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A kind of method for separating lead and antimony from brittle pyrotide ore

A technology of brittle pyro-stibnite and stibnite, which is applied in the field of vacuum metallurgy of non-ferrous metals, can solve the problems of incomplete separation of lead and antimony, low economic benefits, pollution, etc., and achieve the effect of broad industrial application prospects and low production costs

Inactive Publication Date: 2014-10-01
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of incomplete separation of lead and antimony in complex lead-antimony sulfide ores, serious pollution and low economic benefits, the present invention proposes a method for separating lead and antimony in brittle sulfur-lead-antimony ore, which adopts economical and environment-friendly vacuum metallurgy technology, using the differences in the physical and chemical properties of the various phases in the mineral composition, to directly process brittle pyrobenite, to produce galena, stibnite and ferrous sulfide respectively, and to realize the separation of lead and antimony from the source

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Put the brittle pyro-lead-antimony ore after beneficiation (mass percentage: lead 27.56%, antimony 22.90%, iron 9.46%) in the vacuum smelting system, under the pressure of 10-50Pa, the temperature is raised at 5°C / min. Heat to melt the material, then adjust the temperature to 800°C and keep it warm for 20 minutes; then raise the temperature to 1200°C at a heating rate of 10°C / min and keep it warm for 60 minutes; finally cool down at a cooling rate of 8°C / min; when the temperature drops below 100°C , turn off the vacuum system, and take out the material after cooling. The residue is ferrous sulfide, and the volatiles are galena (PbS) and stibnite (Sb 2 S 3 ), that is, to realize the separation of lead and antimony in brittle pyroprobite.

[0016] The obtained galena contained 76.7% lead and 4.87% antimony; the stibnite contained 75.21% antimony and 1.78% lead; the residue contained 54.52% iron, 0.031% lead and 0.043% antimony.

Embodiment 2

[0018] Put the beneficiated brittle sulfur-lead-antimony ore (mass percentage: lead 28.48%, antimony 24.80%, iron 10.58%) in the vacuum smelting system, under the pressure of 10-50Pa, the temperature is raised at 10°C / min. Heat to melt the material, then adjust the temperature to 900°C and keep it warm for 25 minutes; then raise the temperature to 1400°C at a heating rate of 12°C / min and keep it warm for 90 minutes; finally cool down at a cooling rate of 5°C / min; when the temperature drops to 98°C , close the vacuum system, take the material after cooling, the residue is ferrous sulfide, the volatiles are galena (PbS) and stibnite (Sb 2 S 3 ), that is, to realize the separation of lead and antimony in brittle pyroprobite.

[0019] The obtained galena contained 78.97% lead and 1.77% antimony; the stibnite contained 75.50% antimony and 0.54% lead; the residue contained 50.98% iron, 0.026% lead and 0.038% antimony.

Embodiment 3

[0021] Put the brittle pyro-lead-antimony ore after beneficiation (mass percentage: lead 29.82%, antimony 23.54%, iron 11.67%) in the vacuum smelting system, under the pressure of 5-10Pa, the temperature is raised at 15°C / min. Heat to melt the material, then adjust the temperature to 1400°C and keep it for 30 minutes; then raise the temperature to 1000°C at a heating rate of 15°C / min and keep it for 180 minutes; finally cool down at a cooling rate of 10°C / min; when the temperature drops to 95°C , close the vacuum system, take the material after cooling, the residue is ferrous sulfide, the volatiles are galena (PbS) and stibnite (Sb 2 S 3 ), that is, to realize the separation of lead and antimony in brittle pyroprobite.

[0022] The obtained galena contained 79.82% lead and 0.94% antimony; the stibnite contained 76.82% antimony and 0.72% lead; the residue contained 48.62% iron, 0.032% lead and 0.035% antimony.

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Abstract

The invention provides a method for separating lead and antimony of jamesonite. The method comprises the following steps: controlling proper heating temperature and condensing temperature according to the special molecular organization of the jamesonite (Pb4FeSb6S14); and respectively volatilizing and condensing galena (PbS) and stibnite (Sb2S3) by means of a special vacuum environment so as to effectively separate the lead and the antimony from each other. According to the invention, the galena and the stibnite can be directly obtained by directly treating the jamesonite; the jamesonite is treated by using an economic and environment friendly vacuum technology and no reagent needs to be consumed; and the method for separating the lead and the antimony of the jamesonite, provided by the invention, has the advantages of low production cost, no pollution to the environment, no requirement on raw material component content, and wide adaptability; and because no alloy is generated, the product can be directly used for smelting lead-antimony metals.

Description

technical field [0001] The invention relates to a method for separating lead and antimony from brittle pyro-lead-antimony ore, which belongs to the technical field of non-ferrous metal vacuum metallurgy. Background technique [0002] my country is very rich in antimony ore resources, with metal reserves of about 2.2 to 2.5 million tons, ranking first in the world, accounting for 52% of the world's total reserves. Due to the super-intensive mining of antimony ore, the mining of rich and abandoned products, and excessive mining and excessive excavation, the reserves of a single antimony ore have become less and less, and the complex lead-antimony sulfide ore with complex components and difficult separation and smelting has become the main source of metal lead and antimony. raw material. [0003] The lead-antimony complex sulfide ore rich in Guangxi Autonomous Region is one of the main antimony smelting raw materials in my country, accounting for more than 80% of my country's ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B30/02C22B13/02
CPCY02P10/20
Inventor 熊恒杨斌戴卫平徐宝强刘大春陈秀敏邓勇戴永年马文会曲涛李一夫王飞郁青春蒋文龙
Owner KUNMING UNIV OF SCI & TECH
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