Composition and extraction method by means of metals dissolvent with usage of aldoxime or ketoxime extractants

FIELD: metallurgy.

SUBSTANCE: group of inventions concerns composition and method for metal extraction from solution. Composition contains one or more orthohydroxiarilaldoximes and one or more orthohydroxiarilketoximes, and also one or more equilibrium modifier in quantity providing modification extent of presented orthohydroxiarilaldoximes from preliminary 0.2 till 0.61. Equilibrium modifiers correspond alkylphenols, alcohols, esters, alkyl oxides and polyether, carbonate, ketones, nitriles, amides, carbamates, sulfoxides, or amine salts and quaternary ammonium compound. At that one or more equilibrium modifier are chosen from group 2,2,4-trimethyl-1,3-pentanediolmonoisobutyrate, 2,2,4- trimethyl-1,3-pentanedioldibenzoate, dibutyladipate, dipenthyladipate, dyhexyladipate, isobutylheptylketone, nonanon, 2,6,8-trimethyl -4-nonanon, diundecylketone, 5,8-diethyldodecane-6,7-dion, tridecanol and nonyl phenol.

EFFECT: increasing of metals extraction ratio.

11 cl

 

The present invention relates to compositions for solvent extraction, the extraction solvent and, in particular, to a method of extraction of metals, particularly copper, from aqueous solutions, in particular solutions obtained by leaching ores.

Known extraction of metals, particularly copper, from aqueous solutions containing the metal in the form of, for example, salts, by contacting this aqueous solution with an extractant solution-solvent in a water-immiscible organic solvent and then separating the phases of solvent saturated with metal, i.e. containing at least part of the metal in the form of a complex. Then the metal can be removed by washing (Stripping) solution with a lower pH, followed, for example, electrochemical extraction. In most cases, the aqueous metal-containing solution for the extraction of it is produced by acid leaching of ores. However, it is known that some metals, especially copper, can be leached from certain ores ammonia solutions. This has the advantage that the result is solutions containing very high concentrations of copper, and that is a slight contamination of this solution with iron.

Extractants-solvents that were found in the past th is s, particularly favorable for the extraction of copper from aqueous solutions include Aksinya reagents, especiallyabout-hydroxyarylalkyl andabout-hydroxyalkyloxy. Although these reagents has been found to work well for the recovery of copper from solutions, one of the problems encountered when using such reagents is that aldoxime and ketoxime reagents can to such an extent closely associated with metals, which may deteriorate the efficiency of transfer of the metal from the solution from leaching into the wash solution. In order to overcome such problems, with aldoxime or ketoxime reagent frequently used modifiers to affect the binding efficiency of the extractants. Typical modifiers are disclosed in WO96/25525 and, in particular, the class of strongly branched ester modifiers disclosed in EP-A-0202833.

Methods of extraction solvents used in various situations, and has done much work on the establishment of suitable compositions extractants.

In particular, US 4507268 and US 4544532 reveal that when using aldoxime compositions that contain ketoximes reagent, efficient extraction of copper can be achieved in the case when use much smaller amounts of kinetic modifiers and modifications the Directors equilibrium, than when used purely aldoxime composition. Furthermore, according to the US 4507268 and US 4544532 preferably not attended any of the modifiers in the case of those aldoxime compositions which additionally contain ketoximes reagent.

However, it has been unexpectedly found that compositions containing a mixture of aldoxime/ketoxime must contain at least comparable and often superior quantity of kinetic modifiers and modifiers equilibrium compared with the amounts that would be required, if used alone aldoxime.

According to the first aspect of the present invention proposed composition for solvent extraction (solvent extraction)containing one or more orthokeratology and one or more orthokeratosis, and one or more equilibrium modifiers in an amount to provide a degree of modification of the present orthokeratology from approximately 0.2 to 0.61.

Such compositions preferably also contain a water-immiscible organic solvent.

Compositions according to the present invention can contribute to a higher transfer of copper in liquid schemes of extraction. Higher migration of copper can be transformed into increased extraction of metal is a, that may result in fewer relationships of quantities of organic and aqueous phase (O/A) or lower concentrations of the reagent for the degree of extraction. The composition according to the present invention may find particular application of the wash solutions with lower concentrations of acid.

Connection orthokeratosis used in this invention are essentially insoluble in water and preferably have the formula:

Formula (1)

where R1represents an optionally substituted hydrocarbon group,

R2represents an optionally substituted ortho-hydroxyaryl group,

and their salts.

Connection orthokeratology used in this invention are essentially insoluble in water and preferably have the formula:

Formula (2)

where R3represents an optionally substituted ortho-hydroxyaryl group,

and their salts.

Although the invention is described here with reference to compounds of the Formulas (1) and (2), it should be understood that it relates to the aforementioned compound in any of the possible tautomeric forms, as well as to the complexes formed between orthokeratology and orthokeratosis and metals is, in particular copper.

Optionally substituted hydrocarbon group, which may be represented by R1preferably include optionally substituted alkyl and aryl groups, including combinations thereof, such as optionally substituted kalkilya and alkaline group.

Examples of optionally substituted alkyl groups which may be represented by the group R1include groups in which the alkyl component may contain from 1 to 20, in particular from 1 to 4, carbon atoms. The preferred orthokeratosis is one in which R1represents an alkyl, preferably containing up to 20, in particular up to 10, and particularly preferably up to 3, saturated aliphatic carbon atoms, and most preferably R1represents a methyl group.

Examples of optionally substituted aryl groups which may be represented by R1include optionally substituted phenyl group. When R1represents an aryl group, preferably unsubstituted phenyl group.

Optionally substituted ortho-hydroxyaryl groups, each of which independently may be represented by R2andR3include optionally substituted phenols. Examples neoba is consequently substituted phenols, each of which independently may be represented by R2andR3include phenols of the formula:

where R4-R7, each independently, represent H or a linear or branched alkyl group with C1C22preferably with C7C15. Particularly preferably, only R6represents an alkyl group, a C1-22more preferable is an alkyl group with C7C15while R4, R5and R7represent H.

When any one of R1, R2or R3is substituted, the substituent(s) shall be such as to not adversely affect the ability orthokeratology or orthokeratosis to form a complex with metals, especially copper. Suitable substituents include halogen, nitro, cyano, a hydrocarbon radical, such as C1-20-alkyl, in particular C1-10-alkyl; hidrocarburos, such as C1-20-alkoxy, especially C1-10-alkoxy; hydrocarbostyril, such as C1-20-alkoxycarbonyl, in particular, C1-10-alkoxycarbonyl; acyl, such as C1-20-alkylsulphonyl and arylcarbamoyl, in particular, C1-10-alkylsulphonyl and phenylcarbinol; acyloxy, such as C1-20-alkylcarboxylic andarylcarboxylic, in which osobennosti C 1-10-alkylcarboxylic, phenylcarbamoyloxy. May be more than one Deputy, and in this case, the substituents may be the same or different.

There are many ways embodiment orthokeratosis represents the reaction of 5-(C8-C14alkyl)-2-hydroxyacetophenone, more often - oxime 5-(C9-C12alkyl)-5-hydroxyacetophenone, and in particular the oxime 5-nonyl-2-hydroxyacetophenone.

There are many ways embodiment orthokeratology represents 5-(C8-C14alkyl)-2-hydroxybenzylidene, more often - 5-(C9-C12alkyl)-2-hydroxybenzylidene, and in particular 5-nonyl-2-hydroxybenzylidene.

Compositions often contain more than one different orthokeratology and/or more than one different orthokeratosis,in which the nature of the groups of the substituents represented by R1and R2varies between components orthokeratosis, and/or groups to the substituents represented by R3vary between components orthokeratology, especially in the case when the components orthokeratology and/or orthokeratosis are isomeric. Such isomeric mixtures can have better solubility in organic solvents than in that case, it is when there is only orthokeratosis and only orthokeratology.

Orthokeratology and orthokeratosis often present in a total amount of up to 60% by weight of the composition, typically not more than 50%and usually not more than 40 wt.%. Often, the total number orthokeratology and orthokeratosis is at least 1 wt.%, typically at least 2.5 wt.%, and typically at least 5 wt.% by weight of the composition, and preferably ranges from 7.5 to 20%, for example about 10% by weight of the composition.

The equilibrium modifiers used in this invention are essentially insoluble in water. Suitable modifiers equilibrium can be ALKYLPHENOLS, alcohols, esters, ethers and polyethers, carbonates, ketones, NITRILES, amides, carbamates, sulfoxidov, and salts of amines and Quaternary ammonium compounds.

ALKYLPHENOLS, which can be used as modifiers in conjunction with the extractant include alkyl phenols containing from 3 to 15 alkyl carbon atoms, for example, 4-tertbutylphenol, 4-heptylphenol, 5-methyl-4-pentylphenol, 2-chloro-4-Nonylphenol, 2-cyano-4-Nonylphenol, 4-dodecylphenol, 3-pentadecanol and 4-Nonylphenol and mixtures thereof. Preferred phenols include alkyl groups having from 4 to 12 carbon atoms, in particular - mixed 4-nonylphenols, obtained by condensation of the Enola and propylene trimer.

The alcohols which can be used as modifiers in conjunction with the extractant include saturated and unsaturated hydrocarbon alcohols and polyols containing from 14 to 30, preferably from 15 to 25, carbon atoms. The alcohols are preferably highly branched with a hydroxyl group, located approximately in the middle of the hydrocarbon skeleton. Especially preferred are alcohols with branched-chain, which can be obtained by condensation of alcohols with short circuit by way of the Emblem, and such alcohols are sometimes referred to as alcohols Arms. Alcohols optionally may contain an aromatic group or another functional group, in particular ester group.

Particularly suitable alcohols can be synthesized from highly branched precursors, leading to highly branched alcohols Emblem containing a large number of terminal methyl groups. Examples of particularly effective alcohol modifiers include highly branched isohexadecane alcohol and ISO-octadecenoyl alcohol, the latter is a 2-(1,3 .3m-trimethylpentyl)-5,7,7-trimethyloctane-1-ol.

Esters that can be used as modifiers in conjunction with the extractant include saturated and unsaturated alipac the economic and aromatic-aliphatic esters, containing from 10 to 30 carbon atoms. Esters can be difficult monoamine or polyesters, in particular complex diesters. Preferred esters are highly branched. Optional esters can contain other functional groups, in particular hydroxyl group or ether group. In those cases where the ester is the reaction product of an alcohol and a monocarboxylic acid, it is preferable that the alcohol was alkilany alcohol contains from 1 to 6 carbon atoms and monocarboxylic acid contains from 2 to 16 carbon atoms. In the case where an ester is the reaction product of an alcohol and a dicarboxylic acid, it is preferable that the alcohol was alkilany alcohol contains from 1 to 6 carbon atoms, and dicarboxylic acid contains from 4 to 12 carbon atoms. In the case where an ester is the reaction product of diol and monocarboxylic acid, preferably diol was alkilany diola and contained up from 6 carbon atoms and monocarboxylic acid contains from 6 to 16 carbon atoms. In the case where an ester is trialkylphosphates, each of the alkyl groups typically contain from 4 to 14 carbon atoms. Examples of applicable esters include isodecanoate, metalmechanic, 2-pantolactone,n-hexyl who hexanoate, metrizoate, 1,4-balantiocheilos, dibutyltin, diisobutylamine, Dementieva, vexillaria,bis-2-ethoxyethylacetate, dipropylenetriamine, propilenglikolstearat, tributyl phosphate, trioctylphosphine, triethylhexanoin, 2,2,4-trimethyl-1,3-potentialinvestors, 2,2,4-trimethyl-1,3-pentanedionate and, in particular, 2,2,4-trimethyl-1,3-potentialization and 2,2,4-trimethyl-1,3-potentiellement.

Ethers which may be used as modifiers in conjunction with the extractant include simple hydrocarbon ethers and polyethers containing from 12 to 30, preferably from 15 to 25 carbon atoms. Examples of applicable ethers and polyethers include benzyl-2-(2-butoxyethoxy)-ethyl ester and benzyl-2-butoxyethoxy ether.

Carbonates, which can be used as modifiers in conjunction with the extractant include carbonates containing from 4 to 16 carbon atoms. Typically, the carbonates are alkalicarbonate. Examples of applicable carbonates include isobutylketone, isotridecanol and the mixture of carbonates containing a mixture of C8and C10alkyl groups.

Ketones, which can be used as modifiers in conjunction with the extractant include alkylene in which Alki the other group contains from 1 to 20 carbon atoms. Examples of applicable ketones include isobutylacetate, nonanone, 2,6,8-trimethyl-4-nonanone, vandellen and 5.8-diethyltoluene-6,7-dione.

The NITRILES which may be used as modifiers in conjunction with the extractant include aliphatic and analiticheskie hydrocarbonates, which contain from 10 to 36 carbon atoms. Examples of applicable NITRILES include undecylenate and olecontrol.

Amides that can be used as modifiers in conjunction with the extractant include amides containing from 8 to 20 carbon atoms. Amides include products that can be obtained by the reaction of primary or secondary amines with mono - or dicarboxylic acid or its equivalent, in particular phosgene or equivalents. Examples of applicable amides include N,N'bis-2-ethylhexylamine, N,N'bis-2-ethylhexyl-2-ethylhexane, N-hexyl-2-ethylhexanate, N,N'-dibutylamine, N,N'-dibutylamine, N,N'-dimethylacetamide and N,N'bis-2-ethylhexylamine.

Carbamates, which can be used as modifiers in conjunction with the extractant include alkyl and arylcarbamates. Examples of applicable carbamates include N-attributeelement and isotridecyl-N-talkabout.

The sulfoxidov which can be used as modifiers in conjunction with the extractant, include alkylsulfonic. An example of applicable sulfoxide is di-2-ethylhexyladipate.

Salts of amines and Quaternary ammonium compounds that can be used as modifiers in conjunction with the extractant include tertiary amines and Quaternary ammonium compounds containing alkyl groups having from 8 to 18 carbon atoms and their salts sulfonic acid. Examples of sulfonic acids include dinonylnaphthalenesulfonic acid and toluensulfonate acid.

In the context of the present invention, the term "highly branched"applied to alcohols and ethers, means that the ratio of the number of methyl carbon atoms to nemetalni carbon atoms is more than 1:5 and more preferably 1:3.

If desired, as modifiers can be used a mixture of compounds selected from the group consisting of alkyl phenols, alcohols, esters, ethers, polyethers, carbonates, ketones, NITRILES, amides, carbamates, sulfoxidov, salts of amines and Quaternary ammonium compounds. Especially preferred are mixtures containing a first compound selected from the group consisting of alkyl phenols, alcohols, esters, ethers, polyethers, carbonates, ketones, NITRILES, amides, carbamates, is sulfoxides, salts of amines and Quaternary ammonium compounds, and a second compound selected from the group consisting of alkanols having from 6 to 18 carbon atoms, an alkylphenol in which the alkyl group contains from 7 to 12 carbon atoms, and tributyl phosphate.

Preferably use one or more equilibrium modifiers selected from 2,2,4-trimethyl-1,3-pentacyanonitrosylferrate, 2,2,4-trimethyl-1,3-pantonvalentine, 2,2,4-trimethyl-1,3-potentialization, 2,2,4-trimethyl-1,3-pentanedionate, dibutylamine, Dementieva, vexillata, isobutylketone, nonanone, 2,6,8-trimethyl-4-nonanone, cinderellaman, 5,8-diethyltoluene-6,7-dione, tridecanol and Nonylphenol. One or more equilibrium modifiers are present in an amount which provides a degree of modification of the present orthokeratology from approximately 0.2 to 0.61, more preferably from about 0.3 to 0,59, and most preferably from about 0.4 to 0.6.

Used herein, the term "degree of modification" refers to the inverse ratio of (a) the level of the copper content in the washed solvent in the form of hydroxyarylalkyl extractant at equilibrium (expressed in units of grams of copper per liter"), extracted with an aqueous solution containing a fixed concentration of copper and sulfuric acid, (b) the contents of the honey is washed in a solvent in the form of the same extractant under the same conditions, when there is a selected additive modifier equilibrium. According to this definition, the presence of relatively small amounts of modifier equilibrium will slightly shift the equilibrium extraction, which will lead to a small reduction in the copper content in the washed aldoxime the solvent at equilibrium, what will be reflected by the value of the modification degree of approaching to 1.0, for example 0,99. Increased effective amount of modifier under other identical conditions will lead to a more clearly pronounced shift in the balance of extraction and more clearly pronounced reduction in the copper content in the washed aldoxime the solvent at equilibrium, what will be reflected by the degree of modification, respectively component is less than 1.0.

We should expect that the degree of modification resulting from using a specified molar ratio of modifier to balance aldoxime in the reagent will vary depending on such factors as the degree of purity of the composition of the extracting agent used in the formulation of the reagent, the aromaticity of the solvent, and, perhaps most significantly, the chemical identity of the used modifier equilibrium. It will also greatly depend on the conditions used to determine the levels of copper content in the washed solvent. Sledovatel is, in order to determine the degree of modification aldoxime this modifier equilibrium should adhere to the following test conditions. The temperature at which carry out the determination, should be about 24°C. the Molar concentration aldoxime (or mixture aldoxime) in the diluent should be approximately 0,184, as defined by the loading of copper and titration, and should be used in the source aldoxime approximately 94% pure (the rest is essentially amounts to the remainder of the source material alkylphenol). The diluent should be Escaid 100, or a mixture of aliphatic and aromatic hydrocarbons, similar to Escaid 100. To determine the copper content should be applied the method of atomic absorption. The composition of the wash solution should include 150 g/l sulfuric acid and 30 g/l Cu2+. When determining the degree of modification according to the present invention should be applied to the above conditions, because they are the conditions that are very similar to those in most cases are available in industrial equipment for solvent extraction, designed for the extraction of copper.

Organic solvents that may be present in the composition include any low-viscosity organic solvent or mixture of solvents, which are immiscible with the DOI and inert in relation to other present materials in the conditions of extraction. The preferred organic solvent has a low content of aromatic hydrocarbons.

Preferred organic solvents are the hydrocarbon solvents include aliphatic, alicyclic and aromatic hydrocarbons and mixtures thereof, and chlorinated hydrocarbons such as trichlorethylene, perchlorethylene, trichloroethane and chloroform.

Highly preferred organic solvents having a low content of aromatics include solvents and solvent mixtures in which the amount of aromatic hydrocarbons located in the organic solvent is less than 30%, usually about 23% or less, often less than 5%and often less than 1%.

Examples of applicable organic solvents include ESCAID 110, ESCAID 115, ESCAID 120, ESCAID 200 and ESCAID 300, commercially available from Exxon (ESCAID is a trademark), SHELLSOL D70 and D80 300, commercially available from Shell (SHELLSOL is a trademark), CONOCO 170, commercially available from Conoco (CONOCO is a trademark). Suitable solvents are hydrocarbon solvents, including solvents with a high ignition temperature and solvents with a high content of aromatics, such as SOLVESSO 150, commercially available from Exxon (SOLVESSO is a trademark).

Preferable I have are solvents with a low content of aromatics. Some suitable solvents with a low content of aromatics, having a content of aromatics <1 wt.%, for example, hydrocarbon solvents such as ESCAID 100, commercially available from Exxon (ESCAID is a trademark), and ORFOM SX10 and ORFOM SX11, commercially available from Phillips Petroleum (ORFOM is a trademark). From the point of view of the low toxicity and wide availability, particularly preferred are hydrocarbon solvents with relatively low content of aromatics, such as kerosene, for example, ESCAID 100, which is the product of the distillation of crude oil with a total content of aromatics 23%, commercially available from Exxon (ESCAID is a trademark), or ORFOM SX7, commercially available from Phillips Petroleum (ORFOM is a trademark).

There are many ways embodiment the composition comprises at least 30%, often at least 45 wt.%, preferably from 50 to 95 wt.%, water-immiscible hydrocarbon solvent. Mainly may be preferable to prepare and deliver such a composition in the form of concentrate. Then, the concentrate may be diluted by adding organic solvents described above, to obtain compositions in the ranges of the compositions described herein above. If the concentrate contains a solvent, it is preferable to use the same solvent for razvalini the concentrate to be used "when used" concentration ranges. Many variations of the embodiment in the composition of the concentrate is up to 30%, often up to 20 wt.%, preferably up to about 10 wt.%, water-immiscible hydrocarbon solvent. Often in the concentrate composition is more than 5 wt.% water-immiscible hydrocarbon solvent. For some very "strong" (i.e. having a large concentration) concentrates may be necessary to use a higher than normal content of aromatic hydrocarbons. In such cases, when the concentrate is used a solvent with a high content of aromatic hydrocarbons, for dilution of this concentrate to be used "when used" concentration ranges may be used a solvent with a very low content of aromatic hydrocarbons.

According to the second aspect of the present invention, a method of extraction of a metal from a solution in which the acid solution containing the dissolved metal is brought into contact with the composition for solvent extraction, whereby at least part of the metal is extracted into the organic solution, wherein the composition for solvent extraction contains a water-immiscible organic solvent, one or more orthokeratology and one or more orthokeratosis, and so is E. one or more equilibrium modifiers in number, provides a degree of modification of the present orthokeratology from approximately 0.2 to 0.61.

Metals that can be extracted according to the method according to the second aspect of the present invention include copper, cobalt, Nickel, manganese and zinc, and most preferred is copper.

Orthokeratology, orthokeratosis, modifiers balance and water-immiscible organic solvents are as described previously.

The aqueous acidic solution, from which is extracted metals using the method according to the second aspect of the present invention usually has a pH in the range from -1 to 7, preferably from 0 to 5, most preferably from 0.25 to 3.5. It is preferable that in the case where the extracted metal is copper, the pH was less than 3 and were chosen so that the copper is extracted essentially free from iron, cobalt or Nickel. Such a solution can be obtained in the leaching of ores or can be obtained from other sources, for example from metal-containing waste streams, such as copper pickling baths.

The concentration of the metal, particularly copper, in an acidic aqueous solution will change greatly depending on, for example, from the source of this solution. When the solution obtained from you is aleciane ores, the concentration of metal is often up to 75 g/l, and more often from 1 to 40 g/L. When the solution is a waste stream, the concentration of the metal can vary from 0.5 to 2 g/l in the case of wastewater flows to slightly higher values for other waste streams, for example, waste streams from the production of printed circuit boards, and can reach up to 150 g/l, typically from 75 to 130 g/L.

The preferred compositions for solvent extraction are those that contain 5-(C8-C14alkyl)-2-hydroxybenzylidene and the oxime 5-(C8-C14alkyl)-2-hydroxyacetophenone with respect aldoxime to ketoxime from about 90:10 to about 50:50 and contain one or more modifiers selected from 2,2,4-trimethyl-1,3-pentacyanonitrosylferrate, 2,2,4-trimethyl-1,3-pantonvalentine, 2,2,4-trimethyl-1,3-potentialization, 2,2,4-trimethyl-1,3-pentanedionate, butylacetate, penteledata, vexillata, isobutylketone, nonanone, cinderellaman, 5,8-diethyltoluene-6,7-dione, tridecanol and Nonylphenol, in a quantity sufficient to provide the degree of modification in 0,61 or less.

The method according to the second aspect of the present invention can be carried out by contacting the above-mentioned composition for liquid extraction with said acidic aqueous solution. If desired, can be used in the room or elevated temperature, for example, up to 75°C. is Often used temperature in the range from 5 to 60°s, and preferably from 15 to 40°C. an Aqueous solution and the extractant solvent is typically stirred together in order to maximize the interfacial surface between the two solutions. The volume ratio of the extractant solvent to aqueous solution is usually in the range from 20:1 to 1:20, and preferably in the range from 5:1 to 1:5. Many variations of the embodiment, to reduce the size of the installation (enterprise) and maximizing the use of the extractant solvent, support is close to 1:1 ratio of volumes of organic and aqueous phases by returning to the back of one of the threads.

After contact with the acidic aqueous solution of the metal can be recovered from the extractant solvent by contact with the acidic aqueous wash solution.

Water wash solution used in the method according to the second aspect of the present invention, is usually acidic, having in most cases a pH of 2 or less, and preferably a pH of 1 or less, for example, a pH in the range from -1 to 0.5. Usually wash solution contains a mineral acid, in particular sulfuric acid, nitric acid or chloroethanol acid. Many variations of the embodiment, in particular for sulfuric acid, used is concentratie acids in the range from 130 to 200 g/l, and preferably from 150 to 180 g/L. when the extracted metal is copper, the preferred washing solutions contain wash or spent electrolyte from the cell (electrolyzer) electrochemical deposition of copper, typically containing up to 80 g/l copper, often more than 20 g/l of copper, and preferably from 30 to 70 g/l of copper, and up to 220 g/l of sulfuric acid, often more than 120 g/l of sulfuric acid, and preferably from 150 to 180 g/l sulfuric the acid.

Volumetric relationship of organic solution to aqueous wash solution in the method according to the second aspect of the present invention are usually selected such as to achieve transfer per liter of wash solution up to 50 g/l of metal, particularly copper, in the wash solution from the organic solution. In many industrial electrochemical methods selection of copper migration often ranges from 10 g/l to 35 g/l and preferably from the organic solution is transferred from 15 to 20 g/l of copper per liter of wash solution. Usually use volumetric relationship of organic solution to aqueous solution is from 1:2 to 15:1, and preferably from 1:1 to 10:1, in particular less than 6:1.

And the process of separation and washing process can be performed on standard single periodic extraction or by using the column mixers, Il is the same technology constant mixing-settling. The latest technology is usually preferred because it is continuously re-used the washed organic phase, which allows the same amount of organic reagent to be re-used for metal recovery.

The preferred embodiment of the second aspect of the present invention includes a method of extraction of metal from acidic aqueous solution, in which:

in phase 1 the composition of the extraction solvent containing water-immiscible organic solvent, one or more orthokeratology and one or more orthokeratosis, and one or more equilibrium modifiers in an amount to provide a degree of modification of the present orthokeratology from approximately 0.2 to 0.61, first brought into contact with an acidic aqueous solution containing the metal;

in step 2 perform the composition Department at the extraction solvent containing complex metal - extractant solvent, the acidic aqueous solution;

in step 3 perform the contacting of the composition for the extraction solvent containing complex metal - extractant solvent, the acidic aqueous wash solution for the implementation of the re-extraction (leaching) of the metal of the water-immiscible phase;

phase 4 vypolnyayuthij depleted metal compositions for solvent extraction from "loaded" water wash solution.

Further, the invention is illustrated but not limited by the following examples.

Examples

The composition of the extracting agent was prepared by mixing 25 g of 2-hydroxy-5-nonylsalicylaldoxime (aldoxime), 25 g of the oxime of 2-hydroxy-5-nonylacetophenone (ketoxime) and variable amounts of 2,2,4-trimethyl-1,3-potentialization (modifier) in 1 liter of Orfom SX7.

Then, to simulate the extraction, 100 ml of the composition of the extract was mixed with 500 ml containing copper ions acidic aqueous solution for 30 minutes After 30 min the composition of the extract was separated and then brought into contact with fresh acidic aqueous solution containing copper ions. This procedure was repeated until such time as continued changes in copper concentrations in the aqueous and organic phases. The sample was then the organic phase was analyzed for copper content.

This procedure was repeated with a different copper-containing acidic aqueous solutions in order to simulate the conditions of extraction and Stripping.

Below the experimental data obtained show the equilibrium values of Cu content in the loaded organic phase and the values of Cu content in the washed (last reextraction) the organic phase.

Experiment 1< / br>
Wagnerstr
Modeling25 g/l aldoxime:

25 g/l ketoxime

Article option. = 1,0

Orge (g/l)
25 g/l aldoxime:

25 g/l ketoxime:

16 g/l modifier

Article option. = 0,58

Orge (g/l)
The increase in migration %
10.2 g/l Cu

pH 2,0
load5,86of 5.82
45 g/l Cu

133,7 g/l H2SO4
flushing2,481,96
transfer3,383,8614,20%

Experiment 2< / br>
An aqueous solution
Modeling25 g/l aldoxime:

25 g/l ketoxime

Article option. = 1,0

Orge (g/l)
25 g/l aldoxime:

25 g/l ketoxime:

16 g/l modifier

Article option. = 0,58

Orge (g/l)
The increase in migration %
5.0 g/l Cu

the pH of 1.65
load5,725,64
45 g/l Cu

133,7 g/l H2SO4
flushing2,481,96
transfer3,243,68of 13.58%

Experiment 3< / br>
An aqueous solutionModeling25 g/l aldoxime:

25 g/l ketoxime

Article option. = 1,0

Orge (g/l)25 g/l aldoxime:

25 g/l ketoxime:

33 g/l modifier

Article option. = 0,38

Orge (g/l)The increase in migration %10.2 g/l Cu

pH 2,0load5,865,76 45 g/l Cu

133,7 g/l H2SO4flushing2,481,58  transfer3,384,1823,67%

Experiment 4< / br>
An aqueous solution
Modeling25 g/l aldoxime:

25 g/l ketoxime

Article option. = 1,0

Orge (g/l)
25 g/l aldoxime:

25 g/l ketoxime:

33 g/l modifier

Article option. = 0,38

Orge (g/l)
The increase in migration %
5.0 g/l Cu

the pH of 1.65
load5,725,52
45 g/l Cu

133,7 g/l H2SO4
flushing2,481,58
transfer 3,9421,60%

Experiment 5< / br>
An aqueous solution
Modeling25 g/l aldoxime:

25 g/l ketoxime

Article option. = 1,0

Orge (g/l)
25 g/l aldoxime:

25 g/l ketoxime:

50 g/l modifier

Article option. = 0,22

Orge (g/l)
The increase in migration %
10.2 g/l Cu

pH 2,0
load5,865,72
45 g/l Cu

133,7 g/l H2SO4
flushing2,481,3
transfer3,384,4230,77%

Experiment 6< / br>
An aqueous solution
Modeling25 g/l aldoxime:

25 g/l ketoxime

Article option. = 1,0

Orge (g/l)
25 g/l aldoxime:

25 g/l ketoxime:

50 g/l modifier

Article option. = 0,22

Orge (g/l)
The increase in migration %
5.0 g/l Cu

the pH of 1.65
load5,72are 5.36
45 g/l Cu 133,7 g/l H2SO4flushing2,48 1,3
transfer3,244,0625,31%

During the experiments, modeling is no evidence of the formation of pollutants when using modifiers was not.

1. Composition for liquid extraction of metal from a solution containing one or more orthokeratology and one or more orthokeratosis, and one or more equilibrium modifiers in an amount to provide a degree of modification of the present orthokeratology from approximately 0.2 to 0.61, and the equilibrium modifiers are ALKYLPHENOLS, alcohols, esters, ethers and polyethers, carbonates, ketones, NITRILES, amides, carbamates, sulfoxidov, or salts of amines and Quaternary ammonium compounds, and one or more equilibrium modifiers selected from the group 2,2,4-trimethyl-1,3-pentacyanonitrosylferrate, 2,2,4-trimethyl-1,3 pentanedionate, dibutylamine, Dementieva, vexillata, isobutylketone, nonanone, 2,6,8-trimethyl-4-nonanone, cinderellaman, 5,8-diethyltoluene-6,7-dione, tridecanol and Nonylphenol.

2. The composition according to claim 1, in which the degree of modification is from about 0.4 to 0.6.

3. The composition according to claim 1 or 2, in which orthokeratosis not only is jut a compound of the formula

(1)

where R1represents an optionally substituted hydrocarbon group,

R2represents an optionally substituted orthokeratology group

and their salts,

and orthokeratology are compounds of the formula

(2)

where R3represents an optionally substituted orthokeratology group

and their salts.

4. The composition according to claim 3, in which orthokeratosis represents the reaction of 5-(C8-C14alkyl)-2-hydroxyacetophenone and orthokeratology represents 5-(C8-C14alkyl)-2-hydroxybenzylidene.

5. The composition according to claim 1, in which orthokeratosis represents the reaction of 2-hydroxy-5-nonylbenzene, orthokeratology represents a 2-hydroxy-5-nonylsalicylaldoxime, and the equilibrium modifier is a 2,2,4-trimethyl-1,3-potentialization.

6. The method of solvent extraction of metal from a solution in which the acid solution containing the dissolved metal is brought into contact with the composition for solvent extraction, whereby at least part of the metal is extracted into the organic solution, wherein the composition for ecostay extraction contains a water-immiscible organic solvent, one or more orthokeratology and one or more orthokeratosis, and one or more equilibrium modifiers in an amount to provide a degree of modification of the present orthokeratology from approximately 0.2 to 0.61, and the equilibrium modifiers are ALKYLPHENOLS, alcohols, esters, ethers and polyethers, carbonates, ketones, NITRILES, amides, carbamates, sulfoxidov, or salts of amines and Quaternary ammonium compounds, and one or more equilibrium modifiers selected from the group 2,2,4-trimethyl-1,3-pentacyanonitrosylferrate, 2,2,4-trimethyl-1,3-pantonvalentine, 2,2,4-trimethyl-1,3-potentialization, 2,2,4-trimethyl-1,3-pentanedionate, dibutylamine, Dementieva, vexillata, isobutylketone, nonanone, 2,6,8-trimethyl-4-nonanone, cinderellaman, 5,8-diethyltoluene-6,7-dione, tridecanol or Nonylphenol.

7. The method according to claim 6, in which the metal is copper, cobalt, Nickel, manganese or zinc.

8. The method according to claim 7, in which the degree of modification is from about 0.4 to 0.6.

9. The method according to any of PP-8, in which orthokeratosis are compounds of the formula

(1)

where R1represents an optionally substituted, uglevodorov the ing group,

R2represents an optionally substituted orthokeratology group,

and their salts,

and orthokeratology are compounds of the formula

(2)

where R3represents an optionally substituted orthokeratology group

and their salts.

10. The method according to claim 9, in which orthokeratosis represents the reaction of 5-(C8-C14alkyl)-2-hydroxyacetophenone and orthokeratology represents 5-(C8-C14alkyl)-2-hydroxybenzylidene.

11. The method according to claim 6, in which orthokeratosis represents the reaction of 2-hydroxy-5-nonylbenzene, orthokeratology represents a 2-hydroxy-5-nonylsalicylaldoxime, and the equilibrium modifier is a 2,2,4-trimethyl-1,3-potentialization.



 

Same patents:

FIELD: metallurgy.

SUBSTANCE: invention concerns copper hydrometallurgy. Particularly it concerns method for copper extraction received, for instance, ore leaching by means of dense, subterranean and vat method and also from concentrates, dumps, sledges, slugs etc. Method for copper extraction from sulfuric solutions includes extraction at blending of sulfuric solutions with solution of cation-exchange organic selective extractant and further separation of mixture by means of sedimentation with receiving of copper-bearing extract and extraction raffinate. Copper re-extraction from extract is implemented by means of blending extract with solution of sulfuric acid cwith further separation with receiving of copper-bearing extract extractant solution. Then it is implemented cleaning of re-extract by flotation with further filtration or coalescing and electro extraction of copper from clean re-extract with receiving of cathode copper and spent electrolyte. Spent electrolyte is used for copper re-extraction.

EFFECT: decreasing of sulfuric acid consumption, increasing of copper extraction, decreasing of copper losses with spent solutions, improving of cathode copper.

11 cl, 2 ex

FIELD: hydrometallurgy of non-ferrous and precious metals, in particular, extraction recovery of palladium from acid solutions.

SUBSTANCE: method involves using extractant such as mixture of following components, % by volume: 10-15% of 5-(1,1,3,3-tetramethyl butyl)-2-oxybenzophenonoxime; 4-7% of trialkyl amine (C7H15-C9H19)3N; 8-10% of isooctyl alcohol in organic solvent. Utilization of the given extractant provides for an increase in extraction recovery of palladium from concentrated acid solutions (up to 8 mol/l of HCl and 6 mol/l of NNO3) of up to 97.0-99.9% and increase in metal capacity of organic phase (up to 10 h/l). Extractant is preferably used for extraction recovery of palladium from solutions having increased acidity and high initial metal content.

EFFECT: increased efficiency in extraction recovery of palladium from acid solutions within wide range of acidity values and increased metal capacity of extractant.

1 tbl, 2 ex

The invention relates to the field of hydrometallurgy of base and precious metals and can be used for extraction and preconcentration of palladium from acidic sulphate, chloride and nitrate solutions,

There is a method of extraction of palladium from acidic aqueous solutions by extraction of secondary amines [1] the Disadvantage of this method is the lack of selectivity, in particular platinum, which leads to the need for a special operation to separate Stripping of platinum and palladium,

There are ways of extraction recovery of palladium from aqueous solutions by diallylsulfide [2,3] however, they also insufficiently selective and requires additional stages suppression extraction iridium his recovery sulfur dioxide (II), which is passed through the solution,

The known method of extraction of palladium from nitric acid solutions of di-2-ethylhexyladipate acid [4] the Disadvantage of this method is the impossibility of separating the extraction of palladium and non-ferrous metal /copper, iron, and other/ and the low stability of the extractant

FIELD: metallurgy.

SUBSTANCE: invention concerns copper hydrometallurgy by extraction method from sulfuric solutions by organic extractants, and elecro extraction. Particularly from solutions of ore leaching by means of dense, subterranean and vat method and also from concentrates, dumps, sledges, slugs etc. Method for copper extraction from sulfuric solutions, containing copper ions and ions of ferrous iron includes treatment of solution by oxidant containing active oxygen forms, and copper extraction by 2-3 stages by blending of treated copper-bearing solution with solution of organic cation-exchange extractant. After extraction it is implemented mixture separation by sedimentation with receiving copper-bearing extract and raffinate. Copper re-extraction from extract is implemented by 1-2 stages of extract blending with solution of sulfuric acid or treated electrolyte with further separation of mixture by sedimentation with receiving re-extract and extractant solution. From re-extract it is implemented re-extraction of copper with receiving of cathode copper and spent electrolyte.

EFFECT: reduction of extractant consumption, increasing of copper extraction selectivity, increasing of cathode copper quality.

8 cl, 2 ex

FIELD: metallurgy.

SUBSTANCE: invention concerns copper hydrometallurgy. Particularly it concerns method for copper extraction received, for instance, ore leaching by means of dense, subterranean and vat method and also from concentrates, dumps, sledges, slugs etc. Method for copper extraction from sulfuric solutions includes extraction at blending of sulfuric solutions with solution of cation-exchange organic selective extractant and further separation of mixture by means of sedimentation with receiving of copper-bearing extract and extraction raffinate. Copper re-extraction from extract is implemented by means of blending extract with solution of sulfuric acid cwith further separation with receiving of copper-bearing extract extractant solution. Then it is implemented cleaning of re-extract by flotation with further filtration or coalescing and electro extraction of copper from clean re-extract with receiving of cathode copper and spent electrolyte. Spent electrolyte is used for copper re-extraction.

EFFECT: decreasing of sulfuric acid consumption, increasing of copper extraction, decreasing of copper losses with spent solutions, improving of cathode copper.

11 cl, 2 ex

FIELD: metallurgy.

SUBSTANCE: invention concerns hydrometallurgical manufacturing and can be used at bioleaching of sulphide products, containing various nonferrous and precious metals. Method of sulphide-bearing ore treatment includes ore leaching stacked on the watertight basis, located at slope, in heap has a form of rustum of pyramid. Leaching is implemented by means of sulfuric acid solution at concentration 2-10 g/l, containing ions of ferric iron by concentration 1-20 g/l, iron-oxidizing bacteria with microelements and sulphur-oxidizing bacteria. After collection of flowing out solution it is implemented iron regeneration in collected solution in separate instrument by immobilized on neutral bearer bacteria with aeration by air. Metals extraction is implemented from leaching solution.

EFFECT: increasing of metals extraction ratio, decreasing of treatment time.

4 cl, 2 ex

FIELD: metallurgy.

SUBSTANCE: method includes mixing of source concentrate with calcium oxide CaO and calcium peroxide CaO2 and burning in two stages. At the first stage burning is carried out at temperature of 350-500°C within 30-40 minutes, at the second stage - at temperature of 500-800°C during 30-60 minutes. After burning there is performed leaching of non-ferrous metals out of cinder. Consumption of calcium oxide CaO is 50-100% from stoichometric required for binding sulphur into gypsum while consumption of calcium peroxide CaO2 is 1-10% from concentrate weight.

EFFECT: increased extraction of non-ferrous metals and reduced duration of cinder leaching.

2 cl, 2 tbl, 2 ex

FIELD: metallurgy.

SUBSTANCE: before leaching ore is broken and ground to size of 60-70% not more, than 3.0 mm. Leaching of ore is carried out in vats at mixing within 60-120 min with solution of sulphuric acid of primary concentration 10-40 g/l and solid phase contents 50-70%. While leaching during the first 40 minutes concentration of sulphuric acid is maintained within limits of not less, than 10 g/l. After completion of leaching solid and liquid phases are separated and copper is extracted out of leaching liquid phase.

EFFECT: increased extraction of copper out of ore and leaching kinetics and reduction of sulphuric acid consumption and duration of leaching.

6 cl, 6 tbl, 5 ex

FIELD: metallurgy.

SUBSTANCE: method includes breaking and grinding of ore to size of not more, than 0.074 mm, and collective flotation of sulphide and oxidised copper minerals into collective flotation concentrate. After dehydration of concentrate there is performed leaching and mixing with participation of oxygen containing ecologically harmless oxidant at contents of solid phase of 10-50% in water solution of sulphuric acid of 10-80 g/dcm3 concentration at temperature 20-70°C and at presence of trivalent iron ions of 2.0-15.0 g/dcm3 concentration. Cake of leaching is dehydrated and washed, after what liquid phase of leaching is merged with cake washing water. Further merged solution is clarified and copper is extracted out of merged solution thus producing cathode copper.

EFFECT: increased extraction of copper and depth of ore processing; producing commercial output in form of cathode copper and increased ecological compatibility.

11 cl, 2 ex

FIELD: metallurgy.

SUBSTANCE: method includes dry breaking and grinding of ore to size of not more, than 1.0-4.0 mm, ore leaching and mixing, when contents of solid phase is 50-70% with solution of sulphuric acid of 10.0 to 40 g/dcm3 within 0.5-2.0 hrs. After leaching generated cake is dehydrated, washed, subject to neutralisation and crushed to size of 60-95% class - 0.074 mm. Flotation of copper minerals with production of flotation concentrate is carried out. Solution after leaching of ore and cake wash water are merged and freed from solid suspension; then cathode copper is extracted out of them.

EFFECT: reduced consumption of sulphuric acid and water for process; increased extraction of copper out of ore and upgraded quality of consumer products.

8 cl, 2 ex

FIELD: metallurgy.

SUBSTANCE: method of vat bacterial leaching consists in leaching of crumbled, sulphide containing product in water solution of sulphuric acid at value of pH 1.5-2.0 and temperature 10-40°C. Leaching is carried out at presence of ions of trivalent iron of concentration 5-20 g/l, iron oxidizing bacteria of concentration 105 kl/ml and microelements aerated with gas mixture of air and ozone. Contents of ozone in gas mixture are at amount of up to 0.01 vol %. Leaching solution is divided into solid and liquid phase.

EFFECT: upgraded degree of metal extraction out of sulphide containing product and accelerated rate of leaching.

3 cl, 2 ex

FIELD: metallurgy.

SUBSTANCE: method of extraction of sulphide containing ores includes at first stage feeding of water solution of sulphuric acid onto crumbled ore stacked in heap on impervious bed till concentration of not less, than 2.0 g/dcm3 is achieved in solution after leaching, at second stage there is performed feeding of water solution of sulphuric acid containing ions of trivalent iron of concentration more, than 3 g/dcm3. Then productive solutions flowing out of heap are collected and settled, and bivalent iron is oxidized in them with compounds of active oxygen. After metals have been extracted out of productive solutions they are returned for ore leaching.

EFFECT: upgraded degree of sulphides decomposition and extraction of metals; reduced time of leaching, simplicity and low cost of implementation of method and ecological compatibility of process.

10 cl, 2 ex

FIELD: metallurgy.

SUBSTANCE: invention refers to hydro metallurgy of copper as well as other non-ferrous metals by method of extracting out of sulphuric acid solutions with organic extragent and by means of electro extraction, particularly by heap, underground and vat leaching of ore, as well as concentrates, dumps, tails, slag and so on out of solutions. The technical result of the this invention is reduced costs for processing due to reduced cost and consumption of extragent, upgraded quality of the finished product - cathode copper, increased extraction of copper out of solution. The method of copper extraction out of containing iron sulphate solutions includes extraction of copper with cation exchanging organic extragent and production of copper containing extract and stripped raffinate. Further the extract is washed from iron, and re-extraction of copper out of washed extract is performed with production of re-extract and extragent. Cathode copper and spent electrolyte are produced from re-extract by means of electro extraction.

EFFECT: reduction of process costs due to reduced cost and consumption of extragent, upgraded quality of finished product - cathode copper, increased extraction of copper out of solution.

15 cl, 2 ex

FIELD: non-iron metallurgy, in particular reprocessing of copper containing sulfide materials.

SUBSTANCE: invention relates to reprocessing of copper containing materials to produce solutions useful for copper recovering. Method includes two-step autoclave leaching with sulfuric acid. The first step is carried out with limited copper converting into solution. On the second step precipitate is fully leached with fresh sulfuric acid solution while maintaining specific ratio of liquid and solid phases. Method of present invention makes in possible to produce in both leaching steps copper containing solutions of desired composition.

EFFECT: improved method for copper recovering, reduced capacity of autoclave equipment.

23 ex, 1 tbl

FIELD: hydrometallurgy of heavy non-iron metals.

SUBSTANCE: method includes copper sorption from slurry containing 15-20 mass % of (NH4)2CO3 with ampholytic iminodiacetate without preseparation of solid fraction. Invention is useful for copper recovery and concentration when reprocessing of mine waste and other waste from copper industry.

EFFECT: improved copper purification efficiency.

2 tbl, 1 ex

FIELD: nonferrous metallurgy.

SUBSTANCE: invention concerns copper metallurgy and comprises oxidation of white matt while continuously removing releasing blister copper from the zone wherein blister copper interacts with white matt in amount 1 to 30% of the weight of white matt. Content of oxygen in oxidative gas is maintained within a range of 0.75 to 7.5 kg per each 100 g of white matt. Fire refinement of contaminated white matt during continuous release of blister copper allows recovery of Au, Ag, and platinum metals into first portions of blister copper as well as removal of impurities, in particular Ni, Pb, Sn, Fe, Zn, As, Sb, Bi, Se, and Te.

EFFECT: increased refinement efficiency.

2 tbl

FIELD: non-ferrous metallurgy; melting and molding of blanks from copper and its alloys; manufacture of coolers for blast furnaces, crystallizers and other large-sized equipment.

SUBSTANCE: proposed method is used for production of dense ingots free from inclusions at low level of gas saturation adequate for further conversion, good weldability and high heat conductance. Proposed method includes manufacture of consumable electrode from charge materials, electroslag remelting of this electrode, molding of ingot and its deformation; consumable electrode is made by melting the charge materials in 6- or 12-ton crucible in vacuum induction furnace; electroslag remelting is performed to crystallizer, 500-700 mm in diameter; electric mode of remelting is selected depending on diameter of crystallizer; seven seed crystals are placed on tray: one in center and six over periphery at crystallizer walls; electric contact on seed crystals is distributed as required; after deformation, blank is cooled in air.

EFFECT: enhanced efficiency.

5 cl, 1 tbl, 1 ex

FIELD: reprocessing of industry waste, in particular production of blister copper from recoverable materials.

SUBSTANCE: method for pyrometallurgy reprocessing of copper-containing materials includes charging of fuel as reducing agent and copper-containing material into blast furnace, introducing hot or cold wind into blast furnace; reducing fusion and blister copper separation from dross. As fuel-reducing agent metallurgical and lump oil coke in ratio of (95-0):(5-100) mass % is used.

EFFECT: reduced content of expensive coke in fuel, decreased dross efflux and copper content in dross.

7 cl, 3 tbl

FIELD: copper metallurgy; reduction of copper from sulfide compounds in concentrates, mattes and other materials.

SUBSTANCE: proposed method of reduction of copper from sulfide compounds includes reduction of copper by sulfide sulfur; sulfide copper material is charged with caustic soda at the following ratio: 1 : (0.5-2.0) and is heated at temperature 400-650°C for 0.5-3.5 h. Reduction of copper from its sulfide compounds may be performed at temperature below melting point at exclusion of forming of gaseous sulfur-containing products.

EFFECT: enhanced efficiency.

1 tbl, 7 ex

FIELD: metallurgy of non-ferrous and noble metals.

SUBSTANCE: proposed method includes leaching-out metals from oxidized ores or technogenious wastes and extraction of metals from solutions followed by additional strengthening of depleted solutions with the aid of leaching-out agent. Leaching-out of copper is performed at several stages with the aid of solutions at increasing oxidizing/reducing potential; leaching-out of gold is combined with last stage of extraction of copper. The high efficiency of leaching-out of copper at initial stages is reached in presence of ferric iron; leaching-out of gold and last stage of extraction of copper are performed in presence of active chlorine or oxichlorides; copper and gold are extracted from solution by carburizing and gold is extracted by sorption. Depleted solution is brought to pH=4-5 before additional strengthening with leaching-out agent and is treated with oxygen-containing gas, air for example.

EFFECT: enhanced efficiency.

6 cl, 1 ex

FIELD: pyro - metallurgical processes in non-ferrous metallurgy.

SUBSTANCE: method comprises steps of melting copper-nickel sulfide concentrates in double-zone furnace with common sulfide bath for enriched matte; in melting zone melting concentrates with use of oxygen-containing raw blast and in reducing zone depleting slag by means of gaseous (liquid) and solid reducing agent. It provides enriched matte of desired composition and slag with metal content corresponding to that of tails.

EFFECT: simplified process for producing target- composition products.

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