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Method for separating lead and antimony in antimony-containing lead concentrates

A lead concentrate and lead separation technology, applied in the field of antimony in lead sulfide concentrate, can solve the problems of unfavorable antimony recovery, low direct recovery rate of lead and antimony metal, and achieve the effect of reducing harmful effects and concentration

Active Publication Date: 2013-02-06
云南锡业研究院有限公司研究设计院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The direct recovery rate of lead and antimony metals in the fire process is low, and antimony is dispersed in smoke dust, alkaline refining slag and anode slime during the smelting and refining process, which is not conducive to the recovery of antimony

Method used

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  • Method for separating lead and antimony in antimony-containing lead concentrates

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Composition of lead concentrate containing antimony: Pb54.34%, Sb8.20%, S16.87%.

[0019] Prepare 3.00L of 100.00g / L sodium hydroxide solution containing 30.00g / L sodium sulfide, add 1.00Kg of antimony-containing lead sulfide concentrate, stir and mix for 0.5 hours, put the mixture into a closed stirring reactor, and heat to a temperature of 140°C , the pressure in the closed reactor is 0.35~0.4MPa, stirring and reacting for 1.5 hours, filtering to obtain 0.91Kg lead sulfide concentrate and 3.37L leaching solution containing sodium thioantimonite, the lead sulfide concentrate contains 0.76wt% antimony .

Embodiment 2

[0021] Composition of lead concentrate containing antimony: Pb54.34%, Sb8.20%, S16.87%.

[0022] Prepare 3.00L of 120.00g / L sodium hydroxide solution containing 10.00g / L sodium sulfide, add 1.00Kg of antimony-containing lead sulfide concentrate, stir and mix for 0.5 hours, put the mixture into a closed stirring reactor, and heat to a temperature of 160°C , the pressure in the closed reactor is 0.55~0.60MPa, stirring and reacting for 1.0 hour, filtering to obtain 0.93Kg lead sulfide concentrate and 3.43L leachate containing sodium thioantimonite, the lead sulfide concentrate contains 0.97wt% antimony .

Embodiment 3

[0024] Composition of lead concentrate containing antimony: Pb54.34%, Sb8.20%, S16.87%.

[0025] Prepare 3.00L of 80.00g / L sodium hydroxide solution containing 40.00g / L sodium sulfide, add 1.00Kg of antimony-containing lead sulfide concentrate, stir and mix for 0.5 hours, put the mixture into a closed stirring reactor, and heat to a temperature of 120°C , the pressure in the airtight reactor is 0.15~0.2MPa, stirring and reacting for 2.0 hours, filtering to obtain 0.94Kg lead sulfide concentrate and 3.22L leachate containing sodium thioantimonite, the lead sulfide concentrate contains 0.84wt% antimony .

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Abstract

The invention discloses a method for separating lead and antimony in antimony-containing lead concentrates, belongs to the technical field of nonferrous metallurgy, and particularly relates to a method for leaching antimony from antimony-containing lead sulfide concentrates in a pressure manner. The method includes leaching the antimony from antimony-containing lead sulfide concentrates by sodium hydroxide reaction solution containing sodium sulfide in a closed stirred reactor; and separating solution from solid to obtain lead sulfide concentrates and leachate containing sodium thioantimonious acid. The reaction solution contains from 10g / L to 40g / L of the sodium sulfide and from 80g / L to 120g / L of sodium hydroxide. The method has the advantages that the antimony in the lead sulfide concentrates can be effectively removed, the sodium sulfide is prevented from being oxidized in a high-temperature leaching process, and the method is suitable for leaching antimony in antimony-containing lead sulfide concentrates in a complicated mode of occurrence.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal metallurgy, in particular to a method for pressure leaching antimony in antimony-containing lead sulfide concentrate. Background technique [0002] Antimony is a common associated metal in lead sulfide concentrates. In the lead smelting process, 90% of antimony will enter crude lead, and a small amount of antimony in crude lead mainly plays a role in improving the structure of anode slime during lead electrolysis, which is beneficial to the electrolytic refining of lead, but the antimony content in anode lead is too high , the loss of lead in the process of concentrate smelting and crude lead deantimony will increase accordingly, and it will cause the anode lead to contain too much antimony, which will reduce the current efficiency of electrolysis. Therefore, the lead smelting process will affect the antimony content in lead concentrate There are strict restrictions. [0003] For the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/12C22B30/02C22B13/00
CPCY02P10/20
Inventor 崔建明赵惠玲张梅英陈学元潘基泽张家涛李元昌王晓福张振华尹久发杨铣马宇张旭
Owner 云南锡业研究院有限公司研究设计院
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