Antimony sulfide concentrate smelting process

A technology for antimony sulfide concentrate and antimony sulfide, which is applied in the field of metallurgy and chemical industry, can solve the problems of high energy consumption and environmental pollution by arsenic-alkali slag, and achieve the effects of clean and efficient separation, improved reduction effect, and efficient extraction.

Active Publication Date: 2019-07-16
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a new process for smelting antimony sulfide concentrate to solve the problem of high energy consumption and low concentration of SO in the current antimony smelting process.

Method used

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  • Antimony sulfide concentrate smelting process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The main components of antimony concentrate provided by a company in Hunan are: Sb 54.68%, Fe 8.76%, SiO 2 11.36%, As0.35%, Pb 0.22%, S 15.66%, Au 87g t -1 .

[0057] Take 100g of the above-mentioned antimony concentrate powder, at a shear strength of 8000 rpm, a leaching temperature of 85°C, chlorine gas as an oxidant, an oxidation potential of 460mV, a solution volume (ml): concentrate mass (g) = 5:1, and a hydrochloric acid concentration of 5mol ·L -1 And sodium lignosulfonate 0.1g / L under the condition of leaching for 90min, the leaching reaction was completed. Then add an appropriate amount of antimony sulfide concentrate to the leached pulp for reduction, the amount of antimony sulfide concentrate will be leaching the Fe in the pulp 3+ and Sb 5+ reduced to Fe 2+ and Sb 3+ 1.2 times the required theoretical amount, continue to react for 60 minutes. After the reaction is finished, the solution is filtered while it is hot to obtain leaching residue and reduced...

Embodiment 2

[0059] Take 100 g of the antimony concentrate powder in the above-mentioned embodiment 1, at a shear strength of 4000 rpm, a leaching temperature of 65° C., chlorine gas as an oxidant, an oxidation potential of 480 mV, solution volume (ml): concentrate mass (g)=4: 1. The concentration of hydrochloric acid is 7mol L -1 and calcium lignosulfonate 1.8g / L under the condition of antimony sulfide concentrate controlled potential shear enhanced leaching (wherein, the chlorine gas used is the dechlorinated back liquid membrane obtained by repeatedly carrying out repeated experiments according to the conditions in the above-mentioned embodiment 1) Chlorine produced by electrolysis). After leaching for 120min, the leaching reaction was ended. Then add an appropriate amount of antimony powder to the leached pulp for reduction. The amount of antimony powder added is the amount of Fe in the leached pulp. 3+ and Sb 5+ reduced to Fe 2+ and Sb 3+ 1.8 times the required theoretical amount...

Embodiment 3

[0061] The main components of antimony concentrate provided by a company in Hunan are: Sb 32.5%, Fe 16.9%, SiO 2 13.7%, As 1.3%, S 32.4%.

[0062]Take 1000g of the above-mentioned antimony concentrate powder, at a shear strength of 10000 rpm, a leaching temperature of 90°C, chlorine gas as an oxidant, an oxidation potential of 490mV, a solution volume (ml): concentrate mass (g) = 7:1, and a hydrochloric acid concentration of 7mol ·L -1 and sodium lignosulfonate 2g / L, after leaching for 200min, the leaching reaction was completed. Then add an appropriate amount of antimony sulfide concentrate and antimony powder (the mass ratio of antimony sulfide concentrate and antimony powder is 1:1) to the leached pulp for reduction, the addition of antimony sulfide concentrate and antimony powder is the Fe 3+ and Sb 5+ reduced to Fe 2+ and Sb 3+ 1.8 times the required theoretical amount, continue to react for 80min. After the reaction is finished, the solution is filtered while it is...

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Abstract

The invention discloses an antimony sulfide concentrate smelting process. The antimony sulfide concentrate smelting process comprises the steps of controlling potential strengthening leaching, hydrolyzing, controlling potential arsenic precipitation, dechlorination, strengthening reduction smelting; firstly, the antimony sulfide concentrate is subjected to strengthening leaching through a controlled potential shear to obtain a leachate and leached residues, the leachate is restored and then cooled to precipitate elemental sulfur, carrying out dilute hydrolysis on the sulfur-removed leachate toobtain the antimony oxychloride and the hydrolyzed liquid, after the hydrolyzed liquid is subjected to the controlling potential arsenic precipitation to remove arsenic and then returning to the hydrolytic liquid for use, removing chlorine from the antimony oxychloride to obtain crude antimony oxide and dechlorinated liquid, the dechlorinated liquid is electrolyzed by a diaphragm to obtain caustic soda and chlorine, the caustic soda is reused for dechlorination of crude antimony oxychloride, the chlorine is used for controlling potential leaching, the crude antimony oxide is subjected to intensified reduction smelting by adopting a low-temperature molten pool to obtain refined antimony, or is treated by a plasma furnace to obtain the high-purity antimony oxide. According to the antimony sulfide concentrate smelting process, the low-concentration SO2 pollution can be eliminated from the source, the generation of arsenic alkali residue is avoided, and the process has the characteristicsof cleanness and environmental protection.

Description

technical field [0001] The invention belongs to the field of metallurgy and chemical industry, and relates to a smelting process of antimony sulfide concentrate. Background technique [0002] At present, most antimony smelting enterprises in my country mainly use the process of "blast furnace volatilization-reverberatory furnace reduction smelting" to produce metallic antimony. That is, after the antimony sulfide concentrate is granulated, it is added to the blast furnace together with coke and flux for volatilization and smelting, so that antimony enters the high-temperature flue gas, and is recovered in the form of coarse antimony oxide after condensation and dust collection. The low concentration of SO produced during the smelting process 2 Empty after desulfurization. Crude antimony oxide is reduced and smelted in a reverberatory furnace to obtain crude antimony, and then refined to remove arsenic and lead to obtain refined antimony. [0003] Blast furnace volatilizati...

Claims

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Application Information

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IPC IPC(8): C22B30/02C22B3/10C22B5/12C01B17/06
CPCC01B17/06C22B3/10C22B5/12C22B30/02Y02P10/20
Inventor 杨建广刘恢唐朝波李陵晨南天翔闫万鹏汪文超
Owner CENT SOUTH UNIV
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