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Process for preparing antimony by electrolyzing slurry of sulfide ore containing antimony

A technology of pulp electrolysis and antimony vulcanization, which is applied in the improvement of process efficiency, photographic technology, instruments, etc., can solve the problems of unsuitability, large volatilization of sodium sulfide, and high leaching temperature, and achieves convenient storage and transportation, and reduces volatilization loss. The effect of competitiveness

Inactive Publication Date: 2002-11-27
BEIJING GENERAL RES INST OF MINING & METALLURGY
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Problems solved by technology

But it has the following disadvantages: 1) there is the accumulation of growth and accumulation of sodium sulfide, the oxidation of polysulfide and the accumulation of sulfate and sulfite in the leaching process; 2) the current efficiency is low, generally 70%, so the power consumption is high (3000 -4000kWh / tSb); 3) High leaching temperature, large volatilization of sodium sulfide, and harsh operating environment; 4) High alkali consumption, complicated process, and complicated sodium sulfide removal and recovery systems are required after antimony concentrate leaching
But for complex antimony lead ore, it is not suitable to use hydrochloric acid-sodium chloride (or calcium chloride) system
When the system is electrolyzed with antimony-lead ore slurry, antimony and lead can be completely leached at the same time, and the leached antimony and lead will complex with chloride ions in the solution to form antimony-lead-chloride complexes, resulting in a relatively high concentration of lead in the system. Large solubility, due to the small difference in redox potential between antimony and lead, antimony and lead can be precipitated at the cathode at the same time, and effective separation of antimony and lead cannot be achieved

Method used

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  • Process for preparing antimony by electrolyzing slurry of sulfide ore containing antimony

Examples

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Effect test

example 1

[0024] Composition of complex antimony concentrate used: Sb23.4%, Fe14.7%, S23.57%, Pb27.8%. The slurry electrolytic leaching conditions are as follows: antimony concentrate particle size -50μm accounts for more than 90%, take 100g ore sample for electrolysis in a 5L slurry electrolytic cell, leaching temperature is 60°C, hydrochloric acid concentration is 30g / L, ammonium chloride concentration is 200g / L, The antimony concentration is 50g / L, and the cathode current density is 150A / m 2 . The amount of electricity supplied is the theoretical amount required by antimony oxide.

[0025] The leaching rate of antimony was 99.12%, the antimony cathode contained 98.78% antimony and 0.02% lead.

Embodiment 2

[0027] Composition of complex antimony concentrate used: Sb16.1%, Fe11.2%, S18.8%, Pb19.8%. The slurry electrolytic leaching conditions are as follows: antimony concentrate particle size -74μm accounts for more than 70%, take 100g of ore samples for electrolysis in a 5L slurry electrolytic cell, the leaching temperature is 30°C, the concentration of hydrochloric acid is 20g / L, and the concentration of ammonium chloride is 150g / L. The antimony concentration is 40g / L, and the cathode current density is 160A / m 2 . The amount of electricity supplied is the theoretical amount required by antimony oxide.

[0028] The leaching rate of antimony was 96.58%, the antimony cathode contained 98.98% antimony and 0.021% lead.

Embodiment 3

[0030] Composition of complex antimony concentrate used: Sb28.5%, Fe16.5%, S24.7%, Pb34.6%. The conditions of pulp electrolytic leaching are as follows: antimony concentrate particle size -74μm accounts for more than 70%, take 100g of ore samples and carry out pulp leaching electrolysis in a 5L pulp electrolytic tank, the leaching temperature is 50°C, the concentration of hydrochloric acid is 15g / L, and the concentration of ammonium chloride is 250g / L L, antimony concentration is 30g / L, cathode current density is 180A / m 2 . The amount of electricity supplied is the theoretical amount required by antimony oxide.

[0031] The leaching rate of antimony was 97.18%, the antimony cathode contained 97.57% antimony and 0.024% lead.

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Abstract

A process for preparing antimony from the slurry of Sb-contained sulfide ore features that the said slurry is electrolyzed in the hydrochloric acid-ammonium chloride medium to produce the metal antimony plate under the conditions that the concentration of hydrochloric acid in slurry is 15-40 g / L, the concentration of ammonium chloride in it is 150-250 g / L, the concentration of Sb in it is 10-50 g / L, the temp. is from ordinary temp of 70 deg.C and current density of cathode is 150-200 A / sq.m. Its advantages are short flow path, one-step production of Sb plate, high metal recovery rate, and selective extraction of Sb.

Description

(1) Technical field [0001] A method for producing antimony by electrolysis of antimony-containing sulfide mineral slurry, involving a method of extracting antimony from antimony concentrate or complex and difficult-to-handle antimony-containing sulfide minerals, such as brittle stibnite, antimony / gold mixed concentrate or arsenic-containing antimony concentrate , especially the method of extracting antimony from the above-mentioned antimony-containing minerals by means of slurry electrolysis technology. (2) Background technology [0002] The traditional wet antimony smelting process is to use antimony concentrate sodium sulfide leaching-leaching solution purification-diaphragm electrowinning to produce electroantimony. But it has the following disadvantages: 1) there is the accumulation of growth and accumulation of sodium sulfide, the oxidation of polysulfide and the accumulation of sulfate and sulfite in the leaching process; 2) the current efficiency is low, generally 70%...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C1/22
CPCY02P10/20
Inventor 江培海王成彦邱定蕃王含渊王忠陈永强
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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