Method of processing copper-vanadium wastes from purification of titanium tetrachloride
SUBSTANCE: solid copper-vanadium wastes are leached with water to obtain copper-vanadium pulp, to which is added calcium hypochloride or clarified pulp from gas treatment facilities from titanium-magnesium production with concentration of active chlorine equal to 15-90 g/dm3, with ratio of calcium hypochlorite to the copper-vanadium pulp of (1.5-2.0):1. The pulp is held while stirring for 2-5 hours. Hydrochloric acid is added while stirring until achieving solution pH of 2.0-3.0. The suspension is filtered and the copper (II) solution is fed into a cementing apparatus. The precipitate in the form of a mixture of a reducing agent and copper powder is separated into copper powder and a reducing agent. The copper powder is washed, filtered and dried and iron impurities are removed by magnetic separation. After decantation, the reducing agent is returned to the cementing step.
EFFECT: high copper extraction and improved processing properties of the obtained copper powder.
10 cl, 3 ex
The invention relates to ferrous metallurgy, namely metallurgy of titanium, in particular the production of titanium tetrachloride to the recycling of waste generated during the purification of titanium tetrachloride.
One of the methods of purification of titanium tetrachloride from the impurities of vanadium is a chemical method of cleaning a copper powder. The treatment receiving waste - copper-vanadium water containing such valuable components such as copper and vanadium, the disposal of which allows to obtain the finished product and to reduce the emission of harmful components into the environment.
A method of refining chloride slurries of titanium dioxide production, containing titanium, copper and vanadium (autospid of the USSR №1228503, publ. 10.02.2000, bull. No. 4), including leaching waste water water treatment suspension oxidant is chlorine for 60 min, precipitation of hydroxides of the metals of the alkaline reagent is ammonium hydroxide to pH environment of 9.5, separating the precipitate from the solution by filtration and separation of copper from the filtrate by treatment with hydrogen chloride or hydrochloric acid. The precipitate was separated by filtration, washed and dried. The result is a finished product in the form of copper oxychloride. This allows to simplify the technology and to expand the range of products in the form of copper oxychloride.
The disadvantage of this method is that it aims to p the torching of bivalent copper oxychloride, which is a semi-finished product and allows you to get the cementation of copper in the form of marketable products. Use as oxidant ammonium hydroxide leads to the formation of ammonium compounds, which leads, in turn, to additional operations for the disposal and recycling of wastewater, increasing the cost of production of copper oxychloride.
A known method of producing copper powder from a copper-containing chloride solutions (patent RF №2052324, epubl), the number of General features adopted by the closest analogue is the prototype. Copper-vanadium sludge is formed during chemical purification of titanium tetrachloride, dissolved in water at a ratio of 1:3. The solution is injected sodium chloride and/or potassium chloride to the overall concentration of 50-300 kg/m3and hydrochloric acid in the amount of 10-50 kg/m3. The operation of the deposition of copper is carried out in column comentator with the filing of the original solution in the lower part. As metal-reducing use of iron scrap in the form of chips of low-carbon non-alloy steel, of calculation of 0.9-1.1 kg per 1 kg of copper contained in the solution. The resulting powder was washed with 20% hydrochloric acid and then dried in a vacuum drying apparatus at a temperature of 40-80°C for 40-60 minutes. The degree of extraction of copper is of 99.98% with a residual concentration of copper in solution of 0.01 kg/who 3.
The disadvantage of this method of processing copper-vanadium waste treatment process of titanium tetrachloride is that the presence of sodium chloride and/or potassium in the solution reduces the progression of monovalent copper in the divalent. This leads to the fact that the residual copper concentration in the exhaust solutions remains high (see table a patent specification No. 2052324, the index of the last column - 0,01-0,02 kg/m3or in terms of 10-20 mg/DM3). This leads to the pollution of waste water copper compounds that are environmentally harmful to the environment. In addition, particle cementation of copper receive dendritic form - in the form of crystals tree, branching forms, resulting in non-uniform and very fine friable granules (more than 95% of powdered copper get the size 0,016 mm), making it difficult to use, as well as packaging and transport (too much dust).
The technical result is to eliminate the disadvantages of the prototype and allows to increase the degree of extraction of the copper-vanadium waste of divalent copper and thereby reduce the content of copper compounds in the exhaust solutions, improve the particle size of copper powder stable shape and larger in size composition (0,315 mm), thereby to improve the technical properties of the powder is obraznoi copper.
The problem to which the invention is directed, is the reduction of environmental pollution. In addition, the proposed method allows to obtain copper powder superior quality and as a result send to the consumer powdered copper permanent hronologicheskogo composition.
The problem is solved in that in the method of processing copper-vanadium waste treatment process of titanium tetrachloride, comprising leaching the waste water to form a copper-vanadium pulp, processing the obtained slurry with hydrochloric acid, submission to the solution of reducing agent to obtain a precipitate metallic copper, washing and drying the precipitate to obtain the finished product, before applying hydrochloric acid to the slurry under stirring served calcium hypochlorite with a concentration of active chlorine, equal 15-90 g/DM3, stand under stirring for 2-5 hours, then added with stirring, hydrochloric acid until the pH of the solution equal to 2.0 to 3.0, the resulting suspension is filtered, the solution of divalent copper is served in comentator on the surface of the reducing agent, the mixture is heated to a temperature of 40-60°C and under stirring to carry out the recovery process, separating by filtration the precipitate in the form of a mixture of reducing agent and copper powder, the residue is separated by decanting method on a copper powder and restore the spruce, copper powder is treated with a stabilizer, washed, filtered, dried and purified from the impurities of iron magnetic separation.
In addition, as of calcium hypochlorite use bleached pulp of the gas treatment plant of titanium production. In addition, the ratio of calcium hypochlorite to the copper-vanadium pulp is (1,5-2,0):1.
In addition, the reducing agent fed to the recovery process in a quantity above the stoichiometric 1.0-2.0 times.
In addition, processing stabilizer is carried out at a mass ratio of copper powder:stabilizer equal to 1:(100-1000).
In addition, the stabilizer is used mylonaft.
In addition, the stabilizer is used as soap.
In addition, the stabilizer is used glycerin.
In addition, as the reductant used steel shavings.
In addition, the reducing agent after separation of the copper powder return to the stage grouting.
The use of calcium hypochlorite with a concentration of active chlorine, equal 15-90 g/DM3, submitting it to the slurry under stirring and extract with stirring for 2-5 hours allows to fully translate the copper compounds of monovalent form in the divalent form that allows you to more fully precipitate metallic copper from the dissolved soy is ineni copper and thereby reduce its content in the waste solutions from 10-20 up to 0.10-0.20 mg/DM 3.
Download in comentator reducing agent in a quantity above the stoichiometric 1.3-2.0 times and feed on the surface of the reductant solution of divalent copper process recovery when heated to a temperature of 40-60° allows you to more fully carry out the recovery process, and thereby reduce the content of copper compounds in the waste solutions from 10-20 up to 0.10-0.20 mg/DM3.
The process of washing the precipitate by decantation and the processing stabilizer of the copper powder allows you to increase the size of the granules and thereby improve the quality of commercial products.
Conducted by the applicant's analysis of the prior art, including searching by the patent and scientific and technical information sources and identify sources that contain information about the equivalents of the claimed invention, has allowed to establish that the applicant had not found the source, which is characterized by signs, identical all the essential features of the invention. The definition from the list of identified unique prototype as the most similar set of features analogue has allowed to establish the essential towards perceived by the applicant to the technical result of the distinctive features in the claimed method of processing copper-vanadium waste treatment process of titanium tetrachloride contained the claims. Therefore, the claimed invention meets the condition of "novelty."
To verify compliance of the claimed invention the term "inventive step", the applicant conducted an additional search of the known solutions to identify signs that match the distinctive features of the prototype of the characteristics of the claimed device. The stated signs are new and are not derived explicitly for the specialist, as in the prior art, as defined by the applicant, not identified impact provided the essential features of the claimed invention transformations to achieve a technical result. Therefore, the claimed invention meets the condition of "inventive step".
Industrial applicability the present invention is confirmed by examples of its specific implementation.
Copper-vanadium waste (TU 1718-436-05785388-2007) get in the cleaning process of technical titanium tetrachloride copper powder. The result is a solid residue of copper-vanadium water containing copper, chlorides of copper, compounds of titanium and vanadium in the form of oxides and oxychlorides, iron in chloride (see kN.: The production of titanium tetrachloride. - Baibekov M.K., Popov E, Cheprakov MM), metallurgy, 1980, p.53-63) according to the reactions:
In a reactor equipped with a mechanical stirrer, pour 5,7 m3of water and with stirring load of 3.4 t shredded copper-vanadium waste composition, wt.%: Cu - 40, Ti - 4,7, V - 1,25, Fe - 0,16, CL - 40,5, the rest of the mixture. In the resulting slurry gradually under stirring for 5 hours metered 5.0 t solution of calcium hypochlorite waste from cleaning lime milk exhaust gases titanium-magnesium production with a concentration of active chlorine 84 DM3(THE 2147-466-05785388-2001) with a ratio of a solution of calcium hypochlorite to the copper-vanadium pulp, equal to 1.5:1. Calcium hypochlorite is obtained from the exhaust gas cleaning titanium-magnesium production with the milk of lime in the scrubber (see kN.: Production of magnesium. Ivanov A.I., Landres MB Prokofiev OV), metallurgy, 1979, s-362). The oxidation process odnoklasniki copper douglastown copper occurs by the reaction:
After the filing of the calculated quantity of calcium hypochlorite slurry is maintained with stirring for 3 hours. Then for the dissolution of the formed hydroxides of copper and iron in the slurry is added under stirring in the amount of 0.9 tonnes of hydrochloric acid density of 1.1 g/cm3(THE 2122-480-05785388-2009) until the pH of 2.3. The resulting suspension fil the shape on the suction filter. The degree of transfer of copper from copper-vanadium oxide in a solution of divalent copper is 98%. Sediment composition, wt.%: Cu - 12,0, Fe - 1,2, Ti - 10,1, V - 3,5, Cl - 23,8, the rest is sent for further use as an additive in titanium-copper cast iron, and the filtrate, representing a solution duhalista copper with a concentration of 45 g/DM3directed to the process of cementation. The process of cementation is carried out in comentator in the form enamelled tank, equipped with a separated plate with holes and a steam jacket. Steel shavings (GOST 2787-75) in the amount of 1.8 tons in excess of the stoichiometry at 1.34 times, load in chementator, then on the surface of steel shavings pour a solution of divalent copper, the recovery process is carried out at a process temperature of 48°C duration 16 hours under stirring compressed air:
As a result of processing a reducing agent steel - chips - chlorine ions pass into the ferric chloride and copper powder in a mixture with steel shavings deposited on the bottom of comentator. At the end of the recovery process, the mixture is filtered over a suction filter, the filtrate is sent to acid drainage and sediment in the form of a mixture of steel wool and copper powder repulper, again filtered. Then by the method of decanting, the precipitate is separated into copper powder and steel shavings. With the real chips are sent back to the recovery process. The obtained copper powder is weighed and the quantity 1 t sent for processing stabilizer such as mylanta (TU 0258-001-10105154-97) in an amount of 0.015 t and the mass ratio of copper powder:milonoff equal to 1:150. Then the precipitate is washed with water under stirring and filtered on a suction filter. Drying the copper powder is carried out in a vacuum drying Cabinet, then in a muffle furnace at a temperature of 85°C for 4 hours. After drying to remove the steel inclusions of copper powder is subjected to magnetic separation. The result is the cementation of copper in accordance with THE 1793-496-05785388-2009 "Copper cementation" of the following composition, wt.%: 90 Cu, 1,5 Fe, 0.20 chlorides, the rest of the mixture. The finished product is sent back to the cleaning process of technical titanium tetrachloride from vanadium or consumer.
All the same as in example 1, only the stabilizer is used as soap. The obtained copper powder is weighed and the quantity 1 t sent for processing stabilizer, such as soap (GOST 30266-95), in an amount of 0.01 t and the mass ratio of copper powder, soap, equal to 1:100. Then the precipitate is washed with water under stirring and filtered on a suction filter. Drying the copper powder is carried out in a vacuum drying Cabinet, then in a muffle furnace at a temperature of 85°C for 4 hours. After drying for removal the Oia steel inclusions of copper powder is subjected to magnetic separation. The result is the cementation of copper in accordance with THE 1793-496-05785388-2009 "Copper cementation" of the following composition, wt.%: 90 Cu, 1,5 Fe, 0.20 chlorides, the rest of the mixture. The finished product is sent back to the cleaning process of technical titanium tetrachloride from vanadium or consumer.
The obtained copper powder is weighed and the quantity 1 t sent for processing stabilizer such as glycerol (GOST 6824-96, GOST 7482-96), in the amount of 0.001 t and the mass ratio of copper powder:glycerol = 1:1000. Then the precipitate is washed with water under stirring and filtered on a suction filter. Drying the copper powder is carried out in a vacuum drying Cabinet, then in a muffle furnace at a temperature of 85°C for 4 hours. After drying to remove the steel inclusions of copper powder is subjected to magnetic separation. The result is the cementation of copper in accordance with THE 1793-496-05785388-2009 "Copper cementation" of the following composition, wt.%: 90 Cu, 1,5 Fe, 0.20 chlorides, the rest of the mixture. The finished product is sent back to the cleaning process of technical titanium tetrachloride from vanadium or consumer.
Thus, the proposed method allows 20-25 times to reduce the amount of copper compounds in the exhaust solutions that improves the environment, reduces environmental payments C is environmental pollution. In addition, the proposed method allows to obtain copper powder stable shapes and larger sizes hronologicheskogo composition (0,315 mm), which improves the technical properties of powdered copper and allows you to send the consumer powdered copper constant granulometric composition.
1. A method of processing a copper-vanadium waste treatment process of titanium tetrachloride, comprising leaching the waste water to form a copper-vanadium pulp, processing the obtained slurry with hydrochloric acid, submission to the solution of reducing agent to obtain a precipitate metallic copper, washing and drying the precipitate to obtain the finished product, characterized in that before the treatment with hydrochloric acid in the slurry with constant stirring served calcium hypochlorite with a concentration of active chlorine, equal 15-90 g/DM3, stand under stirring for 2-5 hours, then added with stirring, hydrochloric acid until the pH of the solution equal to 2.0 to 3.0, the resulting suspension is filtered, the resulting solution of divalent copper is served in comentator on the surface of the reducing agent, the mixture is heated to a temperature of 40-60°C and under stirring to carry out the recovery process, the resulting suspension is filtered, the precipitate in the form of a mixture of reducing agent and copper powder separated by decanting method on a copper powder and a reducing agent, copper is Orasac process stabilizer, washed, filtered, dried and purified from the impurities of iron magnetic separation.
2. The method according to claim 1, characterized in that the quality of calcium hypochlorite use bleached pulp of the gas treatment plant of titanium production.
3. The method according to claims 1 or 2, characterized in that the ratio of calcium hypochlorite to the copper-vanadium pulp is (1,5-2,0):1.
4. The method according to claim 1, characterized in that the reducing agent fed to the recovery process in a quantity above the stoichiometric 1.0-2.0 times.
5. The method according to claim 1, characterized in that the processing stabilizer is carried out at a mass ratio of copper powder:stabilizer equal to 1:(100-1000).
6. The method according to any one of claims 1 or 5, characterized in that the stabilizer is used mylonaft.
7. The method according to any one of claims 1 or 5, characterized in that the stabilizer is used as soap.
8. The method according to any one of claims 1 or 5, characterized in that the stabilizer is used glycerin.
9. The method according to claims 1 or 4, characterized in that as the reductant used steel shavings.
10. The method according to claims 1 or 4, characterized in that the reducing agent after separation of the copper powder return to the stage of recovery.
SUBSTANCE: invention relates to extraction of metals from flow rich in hydrocarbons and carbon residues with the help of treatment section. Proposed method comprises feeding of said flow to extraction by its mixing with appropriate hydrophilising agent to kill hydrophobic properties of said flow. Mix of said flow and said agent are fed so separation of liquid phase containing major portion of hydrophilising agent and hydrocarbons precipitated from solid phase. Separated solid phase is dried at 350°C to remove medium-light hydrocarbon components. Separated solid phase, preferably dried, is fed for leaching by alkaline solution in the presence of air and/or oxygen, possibly, in the presence of emulsifier or its precursor. Then, leached mix is fed for separation to remove solid residue from leach liquor.
EFFECT: higher yield of valuable metals and hydrocarbons.
13 cl, 3 dwg, 1 tbl, 8 ex
SUBSTANCE: method includes oxidising roasting, percolation leaching of the roasted product with aqueous solution of an oxidising agent or mixtures of oxidising agents to obtain a rhenium-containing solution and an insoluble residue, sorption of rhenium from the rhenium-containing solution in a separate apparatus, drying the insoluble residue, mixing with fluxing agents and fusion on a metal collector. Percolation leaching is carried out at redox potential values of 900-1100 mV and temperature of 50-90°C, with simultaneous sorption of rhenium, followed by desorption and separation of rhenium compounds or rhenium metal from the strippant. The fluxing agents used to fuse the insoluble residue are fluorspar, sodium carbonate and sodium nitrate. Fusion is carried out at temperature of 1200-1800°C on a metal collector in several steps, while discharging the formed slag after each step and fusing the next portion of the mixture on the collector from the previous fusion with separation of the alloy of platinum metals with the collector.
EFFECT: high degree of extraction of rhenium, low reactant consumption, labour input, faster processing of the material, considerable reduction of the volume of solutions which require recycling.
8 cl, 1 dwg, 1 ex
SUBSTANCE: device contains successively installed a feed hopper, an open hearth furnace, an afterburning chamber, a recuperator of combustion air heating, a heat recovery unit, a smoke exhauster and a smokestack, means for fuel supply. The furnace is provided with a bag filter for purification of flue gases from dust and a catalytic apparatus for purification of flue gases from carbon oxides and nitrogen oxides. The catalytic apparatus consists of a vertical case with a conic bottom, inside which from top to bottom placed are: a vertical heat-exchanger, a liquid distributer, an absorption section, a desorption-cooling section, an aspiration hood with a fan and a Venturi tube. A method includes preparation of a charge in the form of a mixture of wastes with flux, loading of the charge and its melting in a bath of the open hearth furnace at a temperature of 1450-1500°C. Performed are: discharge of released combustible components into the afterburning chamber with heat recovery of flue gases, purification of flue gases from dust in the bag filter, purification of smoke gases from carbon oxides and nitrogen oxides is performed in the catalytic apparatus.
EFFECT: method improvement.
2 cl, 2 dwg
SUBSTANCE: group of inventions relates to utilisation of solid mercury-containing wastes, in particular fluorescent lamps. A method of utilisation of solid mercury-containing wastes includes an oxidation stage with further stand, processing a wastes mixture with a demercurised solution of an alkali metal polysulfide with further stand of the reaction mixture. Wastes are divided into two parts. One part, which contains crushed wastes, is processed with an oxidant, and then with a demercurised iodine-alcohol solution or a sodium sulfide solution. The second part of wastes in the form of aeromixture is passed through a nanoporous carbon sorbent NCMS-J. A device for utilisation of mercury-containing wastes contains a unit of loading and crushing, a purification unit and an aeromixture unit. The purification unit is made in the form of a truncated cone, connected by means of a flange to a cylindrical reservoir with a perforated screw, provided with a valve for the solution discharge, and an upper part of the perforated screw is provided with an unloading flange for discharge into a storage hopper. The aeromixture unit is made in the form of a column type adsorber with the nanoporous carbon sorbent NCMS-J.
EFFECT: ensuring reduction of mercury vapour concentration in air and water extract to TLV level, neutralisation of solid wastes of compact fluorescent lamps to IV class of hazard.
7 cl, 1 dwg, 4 ex
SUBSTANCE: furnace includes a housing formed with refractory external side, front and rear end walls, two baths restricted with bottoms, an arch and walls, two drain tap holes, a gas duct and a pedestal, on which all parts are arranged. In the furnace there is external heat insulation of walls, which consists of asbestos tailings and a double layer of asbestos boards. The furnace pedestal has two layers made of light-weight brick with the double layer of asbestos boards between them, a quartz sand layer from below and from above, which is mixed with asbestos tailings, and three layers of asbestos boards on the top, on which bottom block are laid. A casting shoe includes a housing formed with refractory external side, front and rear end walls, a bath, restricted with a bottom, an arch and walls, and drain tap holes. The casting shoe pedestal has two layers made of light-weight brick and separated with an asbestos board layer, and a lower asbestos board layer. The casting shoe has two tap holes made in quick-changeable tap-hole bricks in a box. The furnace has two turning chutes with a turning bowl, which are installed on brackets welded to the casting shoe box, which are turned during liquid metal pouring process for subsequent pouring of molten metal in the furnace to pouring equipment located in a maintenance sector with an angle of 143°. Five injection burners are installed in the furnace and the casting shoe. The furnace operates at natural and artificial draft with a dust and gas cleaning system.
EFFECT: improving efficiency and decreasing heat losses.
5 cl, 12 dwg
SUBSTANCE: electronic waste is crushed on a hammer crusher; crushed copper is added, and then, it is fused in presence of flux during 45-60 minutes at the temperature of 1320-1350°C with air blowdown at its flow rate of 3-4.5 l/h and the obtained slag containing at least 2.6 wt % of precious metals is separated from slag.
EFFECT: effective electronic waste processing with increase of content of precious metals in an alloy.
SUBSTANCE: mixture, consisting of sulphur powder, granules of floatation sulphur pyrite of grade KSF-4 in mixture with broken stone with fraction 20-70 mm or brick crumbs, which are simultaneously agent binding mercury in ionised and neutral forms, taken in ratio 1:9 by weight, and water. After that, mixture is homogenised at rotation rate 20 rev/min, argon is supplied at rate 5.5-6.5 m3/h and then mercury-containing wastes are charged in amount which is at least 50 times less than weight of sulphur powder. Grinding of wastes is carried out to complete binding of metal mercury into water-insoluble compound HgS.
EFFECT: simplification of technology, increase of ecological safety of the process.
SUBSTANCE: method includes combined grinding of wastes with sulphur powder and crushing medium in rotary reactor for binding metal mercury into water-insoluble compound. As crushing medium used is sulphur pyrate with fraction 50-150 mm, which is simultaneously agent, binding mercury in ionised and neutral forms. Before combined grinding mixture of sulphur powder, sulphur pyrate and water is preliminarily homogenised, and reactor is filled with nitrogen, supplied at rate 7.5-8.5 m3/h, in amount which is at least 50 times less than weight of sulphur powder. After that mercury-containing wastes are charged and grinding is carried out to complete binding of metal mercury into water-insoluble compound HgS.
EFFECT: simplification of technology and increase of processing process safety.
SUBSTANCE: oxidised zinc-containing materials with coke dross as a hard carbon reducer are supplied into a rotary tubular furnace and exposed to Waelz process with supply of blow in the form of a steam and air mixture into zone of temperatures 1050-1150°C with content of steam in the mixture 14-25%.
EFFECT: reduced consumption of a reducer and content of zinc and lead in a clinker, eliminates softening of material in a furnace.
2 tbl, 2 ex
FIELD: process engineering.
SUBSTANCE: invention relates to extraction of precious metals. Continuous extraction of precious metal composition from raw stock comprises heating of said stock in plasma kiln to produce slag top layer and fused metal bottom layer. Then, slag layer and fused metal layer are removed. Fused metal removed layer is solidified and fragmented for extraction of precious metals from produced fragments. Note here that said raw stock comprises material containing precious metal and collector metal. The latter is either metal or alloy able to form solid solution, alloy or intermetallide compound with one or several precious metals. Proposed device comprises plasma kiln, teeming table for continuous teeming of fused metal pool to form solidified sheet, fragmentation device and separation unit for extraction of precious metals from sheet fragment alloys.
EFFECT: higher yield.
20 cl, 11 dwg, 2 ex
SUBSTANCE: invention relates to hydrometallurgy of noble metals and can be used for silver extraction from alkaline cyanide solutions by cementation. Proposed method comprises cementation by aluminium as 0.1-2.0 mm thick chips. Cementation is carried out at specific solution feed rate of 1-4 m3/m2·h at concentration of sodium hydroxide of 1.0-10.0 g/l.
EFFECT: higher yield and quality.
3 tbl, 3 ex
SUBSTANCE: proposed method comprises nickel carbonization by forcing nickel salt solution via powder of reduced iron. Said salt solution is forced at the rate of 0.5-1.0 ml/min. Note here that reaction mix is subjected to microwave radiation at frequency of 7.5-10.5 GHz. Said process is conducted at 20-30°C. Nickel salt solution is forced via powder of reduced iron repeatedly at simultaneous microwave radiation effects.
EFFECT: higher degree of nickel extraction.
3 cl, 3 dwg, 1 tbl
SUBSTANCE: method includes copper sedimentation by solution contact with copper-bearing clinker. Before sedimentation clinker is treated with solution containing sulphydric collector, for instance solution containing 0.5-10 g/l of xanthate, during 15-30 minutes. After treatment clinker is contacted with copper-bearing solution.
EFFECT: improving clinker sedimentary capacity, rate and degree of copper sedimentation.
1 tbl, 1 ex
SUBSTANCE: method involves treatment of rock with a sodium cyanide solution with formation of dispersion of rock particles with gold compound in the form of Na[Au(CN)2], which is dissolved in it. Then, particles are removed from the dispersion so that clarified solution of gold compound is obtained. Clarified solution contacts a solid zinc source so that their products are obtained as a result of reactions of ionic exchange and replacement in the form of water solution of zinc compound Na2[Zn(CN)4] and solid phase of gold. Solid phase of gold is separated and processed so that metal gold is obtained. As zinc source there used are particles of zinc hydroxide consisting of a composite sorbent dispersed in water, consisting of cellulose fibres with particles of zinc hydroxide, which are immobilised with them at their chemical deposition. Solid phase of gold is extracted in the form of its hydroxide.
EFFECT: accelerating and simplifying the process.
4 cl, 3 ex
SUBSTANCE: invention can be used for extraction, concentration and cleaning of molybdenum from companion elements (Fe3+, Cu2+, Zn2+, Ni2+, Co2+, Al3+, Sn4+, Sb3+, rare-earth elements3+, etc.) at processing of different liquid and solid molybdenum-containing wastes and middling products. Extraction method of molybdenum from diluted acid solutions containing companion elements of molybdenum involves molybdenum deposition in the form of its salt. Besides, deposition with molybdenum purification is performed in the form of its cesium salt of 12-molybdophosphoric acid containing the following: Cs3-xHxPMo12O40·nH2O (x=0-1, n=9-12). Deposition is performed at heating up to 40-80°C by subsequent addition of orthophosphate-ion in the form of soluble phosphate or orthophosphoric acid, strong acid, for example sulphuric acid or sodium hydroxide up to pH 1-3 and soluble cesium salt, including mother solutions obtained during leaching of pollucite.
EFFECT: increasing extraction degree of molybdenum from process and effluent solutions.
2 dwg, 3 ex
SUBSTANCE: reduction is performed with hydrogen generated in solution; at that, reduction is catalysed with reduced metal itself, which is contained in finely dispersed state. Reduction process is performed in multi-pass reactor at variable pressure that is changed with frequency of 1-5 Hz from maximum to minimum values of 8 kg/cm2 to 0.25 kg/cm2. Extraction plant of metals capable of hydrogen absorption from solutions includes dosing device, modified displacement pump, electrolyser for hydrogen generation and multi-pass reactor in the form of labyrinth.
EFFECT: simplifying the process and improving the purity of extracted metal.
10 cl, 9 dwg, 8 tbl, 4 ex
SUBSTANCE: procedure for treatment zinc containing gold-silver and/or silver-gold cakes consists of sulphuric acid leaching with aeration by air or mixture of gases oxygen-air and in filtration of pulp with production of filtrate containing compounds of zinc, copper and selenium. Selenium is cemented from filtrate with metallic copper. Pulp is filtered and there is produced copper containing selenium cake and the second filtrate. At pH 1.0÷3.0 copper is cemented from the second filtrate with addition of at least one equivalent of metallic zinc. Upon total dissolution of zinc pulp is filtered and there is produced copper containing cake and the third filtrate containing sulphate of zinc. The third filtrate is electrolysed; there is produced cathode zinc. Spent electrolyte is returned to leaching zinc containing gold-silver and/or silver/gold cake.
EFFECT: reduced consumption of sulphuric acid and water at processing zinc containing silver-gold cyanic cakes into commodity silver-gold alloy, metal zinc, metal copper and selenium-cooper product.
16 cl, 1 tbl
SUBSTANCE: here are disclosed 2 versions of fabrication of high porous silver sponge where as source of silver there are used silver salts or silver alloys successively converted into salts. The versions of the procedure consist in preparing concentrated chloride solution whereat silver salt is dissolved in accordance with its solubility at temperature of solution boiling. Salt of polyvalent metal of lead chloride at amount equal to amount of dissolved silver is introduced into prepared solution. Further, silver-lead sponge is settled with zinc. Contaminating substances and lead are removed from settled sponge which is successively washed and dried.
EFFECT: accelerated production of silver sponge due to reduced time for its sedimentation; qualitative stable high porosity of produced silver sponge.
2 cl, 1 dwg, 1 tbl, 3 ex
SUBSTANCE: procedure consists in settling silver with addition of zinc powder. Before sedimentation of silver zinc powder is preliminary activated in 1-5 % solution of HCl at temperature 80-100°C. Lead chloride at amount of 2-15 g/dm3 is added into chloride solution before sedimentation. The procedure of sedimentation consists in adding activated zinc powder to chloride solution heated to 50-60°C and in successive conditioning for forming a lead sponge and sedimentation of silver on it. After conditioning the formed sponge is broken and solution is mixed. Activated powder of zinc is added in big portions.
EFFECT: raised efficiency of chloride solution purification, increased output of silver, reduced consumption of zinc and time of sedimentation, and thereby reduced cost of process.
2 cl, 1 tbl, 3 ex
SUBSTANCE: inventions relate to gold extraction from solutions with low concentration at presence of ions of other metals, for instance cleaning solutions of gold-extracting plants, brines of potassium manufacturing, geothermal water, water of brine lakes and salt water. Essence consists in that through powder of metal-restorative it is passed gold-containing solution with low concentration at presence of ions of other metals during 2-240 hours. In the capacity of metal-restorative it is used lead-plated zinc powder of grade +0.001 mm - 2 mm with lead content 1-90 wt %. or powders of metals, used at temperature of solution not less than 50°C and selected from the group: Zn, Fe, Ni, Pb, Sn, Sb, of grade +0.1 mm - 5 mm. Additionally before cementation powders are placed in cartridge. Received after cementation gold-containing concentrate is separated by means of intensive mechanical agitation, it is treated by nitric or acetic acid. Gold sediment is separated by filtration, dried and molten with fluxing additives with receiving of crude metal.
EFFECT: increase of effectiveness and selectivity of gold extraction from solutions with low concentration.
3 cl, 1 dwg, 3 ex
SUBSTANCE: invention relates to hydrometallurgy and can be used for processing of concentrates, industrial products and solid wastes containing metals. Proposed process comprises leaching of cake 3 n, by HCl solution at 70°C and L:S ratio of 2. Note here that leaching is performed in the presence of table salt of concentration making at least 120-140 g/dm3.
EFFECT: intensified leaching, higher yield.
4 tbl, 2 ex