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Novel method for separating antimony from lead-antimony crude alloy

A crude alloy and separating agent technology, applied in the direction of antimony compounds, chemical instruments and methods, antimony oxide/antimony hydroxide/antimony oxyacid, etc., can solve the problems that cannot be solved completely such as lead-antimony alloy separation, achieve low cost, The effect of simple process

Inactive Publication Date: 2018-10-26
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, none of these processes can solve the complete separation of lead-antimony alloys. Therefore, it is of great significance to study a high-efficiency, low-consumption and environmentally friendly separation method for lead-antimony crude alloys.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Add 8g of powdered PbO to the bottom of the corundum crucible, take 5g of lead-antimony containing 42% antimony and place it roughly on the lead oxide, then put the corundum crucible into a vacuum furnace, and react for 40min at a temperature of 700°C and a pressure of 30Pa. It is measured that the antimony content in the crude lead obtained is 0.34%, and the antimony removal rate is 99.20%.

Embodiment 2

[0012] Add 8g of powdered PbO to the bottom of the corundum crucible, take 5g of lead-antimony containing 42% antimony and place it roughly on the lead oxide, then put the corundum crucible into a vacuum furnace, and react for 40min at a temperature of 750°C and a pressure of 30Pa. It is measured that the antimony content in the crude lead obtained is 0.25%, and the antimony removal rate is 99.40%.

Embodiment 3

[0014] Add 8g of powdered PbO to the bottom of the corundum crucible, take 5g of lead-antimony containing 42% antimony and place it roughly on the lead oxide, then put the corundum crucible into a vacuum furnace, and react for 40min at a temperature of 780°C and a pressure of 30Pa. It is measured that the antimony content in the crude lead obtained is 0.20%, and the antimony removal rate is 99.52%.

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PUM

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Abstract

The invention discloses a novel method for separating antimony from lead-antimony crude alloy. According to the method, under vacuum condition, lead oxide is added to be used as a separating agent, antimony and lead in the lead-antimony crude alloy are separated, antimony is evaporated in the form of antimonous oxide, and antimonous oxide can be used as a high-quality raw material for producing antimony white; when the vacuum degree is 30 Pa, the reaction temperature is 700 DEG C and the reaction time is 40 min, the antimony content of the lead-antimony crude alloy can be decreased from 42% to0.34%, and the antimony removal rate is 99.20%; and when the vacuum degree is 30 Pa, the reaction temperature is 840 DEG C and the reaction time is 40 min, the antimony content of the lead-antimony crude alloy can be decreased from 42% to 0.12%, and the antimony removal rate is 99.71%. Compared with existing lead-antimony crude alloy separation processes, the novel method has the outstanding advantages of being low in energy consumption, complete in separation, simple in process and free of pollution.

Description

technical field [0001] The invention relates to a method for separating antimony from a lead-antimony crude alloy, which belongs to the technical field of nonferrous metallurgy. Background technique [0002] brittle pyrostibite (Pb 4 FeSb 6 S 14 ) is a complex sulfide mineral rich in important metal elements such as Pb, Sb and Ag. Since lead and antimony exist in the form of solid solution in brittle pyroside-antimony ore, they cannot be separated by existing beneficiation methods, so they must be separated through metallurgical processes. At present, the traditional pyrometallurgical process for processing brittle pyrotechnic ore is mainly divided into the following steps: first, put the brittle pyroantimony ore into a fluidized furnace for roasting and desulfurization, and then reduce and smelt it in a blast furnace to obtain a lead-antimony alloy containing about 45% antimony. In the enterprise, this alloy is called lead-antimony crude alloy. At present, the only cur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B13/02C01G30/00
CPCC01G30/005C22B13/02
Inventor 丘克强刘甜甜
Owner CENT SOUTH UNIV
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