Method for nickel and other metal recovery from oxidized ore

FIELD: metallurgy, in particular complex metal recovery from oxidized ore.

SUBSTANCE: claimed method includes granulation with sulfuric acid. Obtained granules are sulfated at 250-4500C for 1-2 h in one or two steps. Then leaching of nickel and other metal sulfates are carried out followed by metal recovery using known methods. Invention is useful in reprocessing of oxidized nickel-cobalt ores, as well as laterite ores containing nickel, cobalt, and copper, and iron-manganese nickel-containing nodules.

EFFECT: high yield nickel recovery; inexpensive and usable equipment.

3 cl, 3 tbl, 4 ex

 

The invention relates to a method of extraction of Nickel and cobalt and may be used for complex extraction of metals during the processing of oxidized nickelcontaining ore and laterite ores containing Nickel, cobalt and copper [1], and iron-Nickel nodules [2, 3].

There is a method of pressure acid leaching of oxidized ores [4]. In this way, for example, at the factory MoA Bay ore slurry containing 45% solids, heated in the heating columns with live steam, and then leached in a chain of four proleptic autoclaves. The treatment is carried out at a temperature of 240-250°With (pressure of about 4.0 MPa). Required sulfuric acid (98%) in an amount of about 240 kg/t of ore fed to the first autoclave. Mixing is carried out in autoclaves with live steam. The leaching time 1-2 hours, while the solution passes about 95% Nickel and cobalt. Disadvantages of the process is the high cost of equipment for autoclave leaching, the complexity of the operation of autoclaves.

Closest to the proposed technical solution is the method of extraction of Nickel and cobalt leaching with sulphuric acid at atmospheric pressure Nickel laterite ores with high content of serpentine [5]. By this method under atmospheric pressure, conducting the leaching of Nickel and cobaltous fine raspolojennoi in water ore (ore content 15-33%) sulfuric acid at a temperature of 80-100° C. the Consumption of sulphuric acid is 80-100% by weight of the dry ore. The duration of the leaching - 1 hour. Tested seven samples of ore with content of 1.92-3,34% Nickel and 0.02-0.18% cobalt. Extraction into solution hesitated for Nickel within 71-96%for cobalt - 95-97%. Excess acid is neutralized with limestone for the partial allocation of iron. The disadvantages of the method - significant excess consumption of acid and a wide range of fluctuations in the extraction of Nickel from various ores.

The technical result of the proposed solutions is to achieve a high degree of extraction of the oxidized ores of Nickel and cobalt, and other metals, when used for ore processing very simple equipment.

The technical result is achieved by the fact that according to the proposed method of oxidized ore granularit sulfuric acid is used in an amount necessary for stoichiometric value for transfer to the sulphates contained in the ore metal oxides that react with it. Granules sulfatizing at a temperature of 250-450°C for 1-2 hours in one or two stages. Then spend the leaching of sulphate of Nickel and other metals with water, and then extract the metals from solutions of known methods. The first stage is carried out at a temperature of 250-350°C, the second at a temperature of 350-450°C. the result of the use of the process of granulation of oxidized Nickel ore with sulfuric acid, which ensures good mixing of these components sittin sulfatization leads to intensive interaction sulfuric acid and compounds extracted precious metals with obtaining water-soluble sulfates

Example 1 (the prototype)

To the aqueous slurry of the oxidized concentrate (content, %: 1,25 Ni; 0,44 With; 17,9 Fe) with a ratio of T:W=1:3 introduced sulfuric acid (based on 100%) in an amount of 0.92 t/t ore. Preliminary calculations showed that for a transfer to the sulphates contained in the ore metals (Ni, Co, Fe, Mg and others) according to the stoichiometric ratio must be expended acid 0,5-0,55 t/t ore. So the real amount of acid 1.67-1.84 times the stoichiometric required.

The leaching is conducted at a temperature of 90°C for 1 hour. The solution is extracted, %: 37,9 Ni; 19,1 With; 21,0 Fe.

Example 2

Laterite Nickel ore (example 1) was supranumerary with sulfuric acid at a flow rate of the last of 0.53 to 0.60 t/t ore, pellets processed (sulfamethizole) at a temperature of 200°C for 1-2 hours. Then spent leaching granules with water at a ratio of T:W=1:3 for 3 hours. The temperature of the leaching - 70-80°With (using the heat of the hot pellets). When leaching granules collapsed. The results of leaching are shown in table 1.

Table 1

The dependence of extraction of metals in solution from the consumption of acid and time of sulfatization granules.
The consumption of H2SO4t/tTime, hExtraction into solution, %
  NiCoFe
0,53180,079,163,7
0,60283,282,974,7

Example 3

Laterite Nickel ore (example 1) was supranumerary with sulfuric acid (0.5 to 0,53 t/t) and the resulting granules were sulfamethizole at temperatures from 150 to 400°C for 2 hours. Then spent vivaladiva granules water (T:W=1:3, 90°C, 3 hours). The results are shown in table 2.

Table 2

The dependence of extraction of metals in solution temperature of sulfatization
TemperatureExtraction into solution, %
sulfatization, °NiCoFe
15077.375.358.3
20082.580.159.0
25088.887.763.1
30093.090.163.0
3508.0 87.163.3
45087.586.062.0

As can be seen from the table, the temperature rise of sulfatization above 300°To reduce the degree of translation of Nickel and cobalt sulfates and their extraction into the solution during leaching. This fact can be explained by the loss of sulphuric acid in the process of sulfatization due to the increase of its temperature above the boiling point of sulfuric acid equal to 330°From [6].

Optimal admittedly temperature in the range of 250-350°C, preferably 300°C.

Example 4

Laterite Nickel ore (example 1) was supranumerary with sulfuric acid (0,52-0,60 t/t). The obtained granules were sulfamethizole as follows: one hour and kept at a temperature of 250°With, then increase the temperature to 350 to 450°and stood still for hours. Leaching of sulfated granules held water (T:W=1:3, 70°C, 3 hours). The results are shown in table 3. In addition to Nickel, cobalt and iron solutions contained, in g/l: 0,64 MP; 1,79 SG; 2,0-3,0 A1; 5,5-6,0 Mg.

Table 3

The dependence of extraction of metals in solution temperature phase 2 of sulfatization
ConsumptionTemperature, ° Extraction into solution, %
H2SO4t/tstage 1stage 2NiCoFe
0.60250-88.687.163.2
0.5525035092.891.958.6
0.5925040090.989.956.9
0.5225045093.992.055.6

In this embodiment, the first phase of sulfatization at a temperature of 250°To form sulfates of Nickel, cobalt and iron, the second (at temperatures of 350-450° (C) are exchange reactions between oxides of Nickel and cobalt and ferric sulfate, as evidenced by the decrease in the extraction of the latter in the solution.

The optimum temperature of the second stage of sulfatization - 350-450°C.

As seen from the above examples, the use of the proposed method in the solution are extracted, %, up to 92-94% of Nickel and cobalt, 55-64% of iron and chromium; manganese; magnesium and aluminum. These metals can be separated from solution by the known methods.

In all these examples, the granules when they are leaching dissolved, allowing you to dismiss the SJ from the operation of grinding.

Technical efficiency of the proposed method of processing of laterite Nickel ore is the dramatic reduction of the consumption of sulfuric acid. For carrying out these processes use simple designs and much cheaper and more convenient in operation than autoclaves, equipment granulators, a tubular rotary kiln). When this is achieved a high degree of extraction of Nickel, cobalt and other metals. Provides a high complexity of the use of raw materials.

SOURCES of INFORMATION

1. Siemens Richard E., Coggs John D. Process for recovery of nickel, cobalt and copper from domestic laterites // Mining Congr. J. 1977. Vol.63, N1. P.29 - 34.

2. Pat. 2184163 Russia, IPC722 In 47/00, 3/08. A method of processing iron-ore./ FSUE Central, N.-I. Geologorazvedka. Inst. color. and Belgorod. met. // Publ. 27.06.2002.

3. Kang Siqi, Yaunding Chen. Sulfating roasting of ocean manganese nodule // Erzmetall. 1998. Vol.51.N6. P.415-418.

4. Reznik I.D., Ermakov G.P., Schneerson AM Nickel. M: 000 "Science and technology", 2001. Vol.2: Oxidized Nickel ore.

5. Pat. 6379637 USA, IPC722 In 23/00. Direct atmospheric leaching of highly-serpentinized saprolitic nickel laterite ores with sulphuric acid. / Walter Curlook, W. Curlook // Publ. 30.04.2002, NPK 423/150 .4.

6. Koronovskii IT, Nazarenko, P., Ncrac E.F. Quick reference for chemistry. Kiev: Naukova Dumka, 1987.

1. The method of extraction of Nickel and other metals from oxidized ores, which includes the processing of ore with sulfuric acid translation of the m in a solution of soluble sulfates, characterized in that the ore granularit sulfuric acid granules sulfatizing at a temperature of 250-450°C for 1-2 h in one or two stages, followed by leaching of sulphate of Nickel and other metals with water, and then extract the metals from the solution by the known methods.

2. The method according to claim 1, characterized in that the first stage is carried out at a temperature of 250-300°C, the second at a temperature of 350-450°C.

3. The method according to claim 1, characterized in that sulfatization granules is carried out at the stoichiometric consumption of sulphuric acid.



 

Same patents:

The invention relates to ferrous metallurgy and can be used for processing sulfide concentrates containing heavy non-ferrous metals, smelting in a suspension with a high recovery of valuable metals in the melt - Stein

The invention relates to a method for deposition of Nickel from an aqueous solution containing Nickel sulfate, in the form of a metallic powder, is acceptable as an alloying element for stainless steel

The invention relates to a method for deposition of Nickel from an aqueous solution of a Nickel compound in the form of a metallic powder with hydrogen

The invention relates to the field of non-ferrous metallurgy, in particular to the production of Nickel matte in shaft furnaces
The invention relates to the processing of Nickel-cobalt concentrate and can be used to obtain pure compounds of Nickel and cobalt with the Department related impurity metals such as iron, copper and zinc

The invention relates to ferrous metallurgy, in particular to the technology of smelting of oxidized Nickel ores (NRO)

The invention relates to a method of extracting metal from ore or concentrate containing Nickel and/or cobalt and other metals

The invention relates to the processing of raw materials, in addition to ores, e.g. scrap, to produce ferrous metals or their compounds, in particular, from spent Nickel-cadmium batteries

The invention relates to a hydrometallurgical method of selection, extraction and recovery of valuable components of Nickel, cobalt and copper from sulphide flotation concentrate

The invention relates to ferrous metallurgy and can be used when carrying out high-temperature reduction processes

FIELD: metallurgy, in particular complex metal recovery from oxidized ore.

SUBSTANCE: claimed method includes granulation with sulfuric acid. Obtained granules are sulfated at 250-4500C for 1-2 h in one or two steps. Then leaching of nickel and other metal sulfates are carried out followed by metal recovery using known methods. Invention is useful in reprocessing of oxidized nickel-cobalt ores, as well as laterite ores containing nickel, cobalt, and copper, and iron-manganese nickel-containing nodules.

EFFECT: high yield nickel recovery; inexpensive and usable equipment.

3 cl, 3 tbl, 4 ex

FIELD: cobalt and nickel recovery from ores.

SUBSTANCE: claimed method includes ore granulation with sulfuric acid at stoichiometric ratio. Granules are baked at 650-7000C for 2.5-3.0 h up to soluble iron content of 1.0-3.0 % followed by leaching with water. Before baking granules are sulfated at 200-2500C for 1 h.

EFFECT: high yield metal recovery; decreased sulfuric acid consumption; granulated sulfated product without decomposition during leaching with water.

3 cl, 3 tbl, 4 ex

FIELD: reprocessing of oxidized ore by sulfating.

SUBSTANCE: claimed method includes raw treatment with sulfuric acid, transfer of soluble sulfates into solution and roasted product leaching. Batch is baked in gas medium obtained by oxidizing of elementary sulfur of sulfides with air oxygen. Then gases are recycled into sulfuric acid production. Sulfur oxides released during batch baking are utilized together with sulfur oxidation products charged in oven.

EFFECT: prevention of sulfur oxides losses; cobalt and nickel recovery with high yield; reduced fuel consumption.

1 tbl, 3 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.

FIELD: hydro-metallurgy; reworking iron cakes containing non-ferrous metals, nickel and cobalt in particular; utilization of by-products of hydro-metallurgy for return of valuable components to technological process.

SUBSTANCE: moist cake is subjected to treatment with sulfuric acid in presence of ferric chloride (III) introduced in the amount of 4.5-7.5 mass-% of FeCl3 relative to Fe2O3 contained in pulp. Then, iron is reduced to bivalent state by sodium sulfite solution at concentration of 150-260 g/l at mass ratio of Fe2O3:Na2SO3=(0.18-0.23):1 at simultaneous deposition of iron in form of ferric sulfite (II) which is subjected to thermolysis in boiling mode continued for 0.5-1.5 h for forming hydrated ferrous oxide (II) which is separated from solution by filtration containing ions of non-ferrous metals; then, it is washed and subjected to heat treatment at 400-440°C for 0.5-1.5 h for forming ferric oxide (III). Thermolysis of ferrous oxide (II) may be performed under rarefaction; sulfur dioxide separated at this is neutralized with soda for obtaining sodium sulfite solution which is directed to iron reduction stage. Ferric chloride (III) solution may be obtained through treatment of part of iron cake in the amount of 3.5-5.5 mass-% of concentrated hydrochloric acid taken in stoichiometric amount relative to iron contained in cake. Proposed method makes it possible to increase extraction of non-ferrous metals iron cake to 96.5-98.5% at simultaneous obtaining ferric oxide (III) powder possessing pigment properties at reduced content of admixtures of non-ferrous metals.

EFFECT: facilitated procedure.

6 cl, 6 ex

FIELD: chemical engineering.

SUBSTANCE: method consists in (i) preliminarily reducing laterite particles in reactor, preferably fluidized-bed reactor, to produce in situ reducing gas via addition of reducing, for example carbon material, into fluidized-bed chamber, (ii) fluidizing the bed with oxidizing gas, and (iii) maintained reactor temperature such as to allow partial combustion of coal and formation of reducing medium. Calcined product with carbon level 1.0 to 1.5 is finally discharged from reactor.

EFFECT: enhanced process efficiency.

26 cl, 2 tbl

FIELD: chemistry.

SUBSTANCE: extractant has bi-phosphorus acid and additionally has tri-phosphate with relation of said components (0,5-1,25):1. Method for producing extractant includes adding to 2-ethylhexanole of chlorine oxide of phosphorus with their relation (4,5-5,1):2,0, and with parameters determined by reaching fullness of passing of reaction, after that reaction mixture is exposed until full removal of formed chlorine hydrogen, then to received mixture 1 mole of water is added, mixture is exposed to full hydrolysis. Then mixture is washed ad water layer is separated from organic remainder, containing said bi-phosphoric acid and tri-phosphate.

EFFECT: higher efficiency.

2 cl, 1 dwg, 2 tbl, 4 ex

FIELD: non-ferrous metallurgy; methods of processing of cobalt-bearing manganese-iron crust formations.

SUBSTANCE: the invention is pertaining to non-ferrous metallurgy and may be used at processing of cobalt, nickel, manganese and copper. The cobalt-bearing manganese-iron oceanic crust formations are crushed to the sizes of the source raw - 90 % - 0.074 mm and leached in 2 stages at the air pressure. On the first stage conduct lixiviation by 3.5-7 % solution of sulfuric acid at the temperature of 15-25°C within 0.5-1.5 hours with the subsequent filtration. On the second stage leach a solid phase by the filtrate of the first stage at pH = 2.5-3.5 at presence of a reducing agent at the mass ratio of the reducing agent to the cobalt-bearing manganese-iron oceanic crust formations as (0.01-0.075):1. The gained solution is filtered with production of a filtrate and a solid phase and reprocess the filtrate with extraction of commercial products. In the capacity of the reducing agent use sodium sulfite, sodium bisulfite, permonosulfuric acid, hydrogen peroxide, hydrogen sulfide, monochlorous copper. The invention ensures a decreased consumption of reactants, increased extraction of cobalt, nickel, manganese and copper.

EFFECT: the invention ensures a decreased consumption of reactants, increased extraction of cobalt, nickel, manganese and copper.

2 cl, 1 dwg, 7 tbl

FIELD: combined processing of copper-nickel cobalt-containing sulfide materials at different copper-to-nickel ratio at obtaining anode copper, high-grade matte and waste slag.

SUBSTANCE: proposed method includes pyro-metallurgical processing of copper-nickel cobalt-containing sulfide materials at different copper-to-nickel ratio accompanied by producing anode copper and nickel slags. High-grade matte is obtained both directly in flash smelting furnace at processing materials at low copper-to-nickel ratio and in converters by processing metallized electric furnace matte together with nickel slag. Proposed method makes it possible to reduce cost of production of high-grade matte and losses of non-ferrous and precious metals, to facilitate procedure of utilization of sulfur dioxide from waste gases and enhancing utilization.

EFFECT: enhanced efficiency; increased volumes of processing nickel slag.

7 cl, 3 dwg, 2 tbl, 5 ex

FIELD: metallurgy; nickel and cobalt metallurgy.

SUBSTANCE: the invention is pertaining to the field of metallurgy, in particular, to nickel and cobalt metallurgy. The method of decoppering of nickel or nickel-cobalt converter matte includes: a primary calcination of the converter matte up to the residual mass share of sulfur from 1.5 up to 2.5 %; a sulfate-chlorinating calcination of a cinder at the temperature from 600°C up to 750°C at presence of a chlorine-containing reactant and oxygen; leaching with the help of the sulfuric acid solution of the water-soluble copper compounds from the chlorinated cinder. At that the primary calcinations of the converter matte is conducted up to a residual mass share of sulfur of no more than 0.3 %, and a sulfate-chlorinating calcination of the cinder is conducted at presence of a chlorine-containing reactant, oxygen and an elemental sulfur. The elemental sulfur is introduced in the reactor of chlorination of the cinder in a mass amount from 50 up to 100 % to the mass of copper in the cinder. At that it allows to achieve selectivity of the copper chlorination, because the cupric oxide is chlorinated better, than nickel and cobalt oxides, and the ratio of nickel to copper in the sulfuric acid solution after the subsequent leaching of the chlorinated cinder in the solution of sulfuric acid is three times lower, than it is in the method of the nearest analog.

EFFECT: the invention allows to achieve selectivity of the copper chlorination, a three times lower ratio of nickel to copper in the solution after the subsequent leaching of the chlorinated cinder in the sulfuric acid solution, than in the method of the nearest analog.

2 cl, 3 tbl, 3 ex

Up!