A kind of method of separating lead and antimony by vacuum treating brittle pyroprofen ore

A technology for brittle sulphur-lead-antimony ore and vacuum treatment is applied in the field of non-ferrous metal smelting, which can solve the problems of polluting the environment, many returned materials, long process flow, etc. Effect

Active Publication Date: 2018-03-06
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many problems in this smelting method, mainly manifested in the large number of returned materials in the smelting process, long process flow, low metal recovery rate, environmental pollution, etc., which restrict the comprehensive utilization of brittle sulfur-lead-antimony ore

Method used

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  • A kind of method of separating lead and antimony by vacuum treating brittle pyroprofen ore
  • A kind of method of separating lead and antimony by vacuum treating brittle pyroprofen ore

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Embodiment 1

[0031] Embodiment 1: as figure 1 Shown, the method for vacuum treatment of brittle pyroprobite to separate lead and antimony, its concrete steps are as follows:

[0032] (1) Combine the beneficiated brittle lead antimonite and yellow antimonite (Pb 4 FeSb 6 S 14 with Sb 2 o 4 Molar ratio 1: 1.7) mixing;

[0033] (2) Place the mixed material obtained in step (1) in a vacuum furnace, vacuum distill for 2 hours under the conditions of controlling the residual pressure in the furnace to 5Pa and the distillation temperature to 550°C, and then cool it down. When the temperature drops below 100°C, close the Vacuum system, take out material after cooling to obtain volatile Sb 2 o 3 Product and residue PbS and FeS;

[0034] (3) Put the residue PbS and FeS obtained in step (2) in a vacuum furnace, vacuum distill for 2 hours under the condition of controlling the residual pressure in the furnace to be 10Pa, and the distillation temperature is 1000°C, and then cool down. When the ...

Embodiment 2

[0036] Embodiment 2: as figure 1 Shown, the method for vacuum treatment of brittle pyroprobite to separate lead and antimony, its concrete steps are as follows:

[0037] (1) Combine the brittle pyroprobite and pure Sb after beneficiation 2 o 4 (Pb 4 FeSb 6 S 14 with Sb 2 o 4 Molar ratio 1: 1.6) mixing;

[0038] (2) Place the mixed material obtained in step (1) in a vacuum furnace, vacuum distill for 1.5 hours under the conditions of controlling the residual pressure in the furnace to 10Pa and the distillation temperature to 600°C, and then cool it down. When the temperature drops below 100°C, Close the vacuum system, take the material after cooling, and obtain the volatile Sb 2 o 3 Product and residue PbS and FeS;

[0039] (3) Put the residues PbS and FeS obtained in step (2) in a vacuum furnace, vacuum distill for 1 hour under the conditions of controlling the residual pressure in the furnace to be 15Pa and the distillation temperature to be 1200°C, and then cool do...

Embodiment 3

[0041] Embodiment 3: the method for separating lead and antimony from this vacuum treatment brittle pyroprobite ore, its specific steps are as follows:

[0042] (1) Combine the brittle pyroprobite and pure Sb after beneficiation 2 o 4 (Pb 4 FeSb 6 S 14 with Sb 2 o 4 molar ratio 1:1.5) mixing;

[0043] (2) Place the mixed material obtained in step (1) in a vacuum furnace, vacuum distill for 1 hour under the conditions of controlling the residual pressure in the furnace to 20Pa and the distillation temperature to 580°C, and then cool it down. When the temperature drops below 100°C, close the Vacuum system, take out material after cooling to obtain volatile Sb 2 o 3 Product and residue PbS and FeS;

[0044] (3) Put the residue PbS and FeS obtained in step (2) in a vacuum furnace, vacuum distill for 0.5h under the conditions of controlling the residual pressure in the furnace to 5Pa and the distillation temperature to 1400°C, and then cool it down. When the temperature dr...

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Abstract

The invention discloses a method for separating lead and antimony by vacuum treating brittle pyrotite ore. In the method, the brittle pyrotite ore after ore dressing is placed under vacuum conditions to separate lead and antimony, and Sb2O4 or tetroxide is added during the vacuum treatment process. Diantimony minerals generate Sb2O3 at a low temperature of 550~640°C to realize the separation of antimony and lead; the method of the present invention avoids the influence of incomplete separation of lead and antimony in each process of the traditional process, reduces energy consumption, and saves costs. There is no pollution to the environment, and the products are directly Sb2O3 and PbS, which can be directly used to produce metal antimony and metal lead, avoiding the production of lead-antimony alloys in the smelting process.

Description

technical field [0001] The invention relates to a method for separating lead and antimony by vacuum treating brittle pyroprofen ore, belonging to the field of nonferrous metal smelting. Background technique [0002] brittle pyrostibite (Pb 4 FeSb 6 S 14 ) is a complex sulfide ore with polymetallic symbiosis, and it is an important raw material for extracting and recovering antimony (Sb), lead (Pb), silver (Ag) and other valuable metals. The technical key to processing this ore is how to effectively separate lead and antimony. The known treatment method is boiling roasting-reduction smelting, which mainly obtains lead-antimony alloy through high-temperature melting, and then performs repeated oxidation refining and reduction refining on the lead-antimony alloy to obtain metal lead and metal antimony respectively. There are many problems in this smelting method, mainly manifested in the large number of returned materials during the smelting process, long process flow, low ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B13/02C22B30/02C22B5/16
Inventor 邓勇杨斌戴永年熊恒徐宝强刘大春郁青春王飞田阳闫华龙王威董朝望曲涛李一夫蒋文龙王宇栋
Owner KUNMING UNIV OF SCI & TECH
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