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A method for vacuum distillation desulfurization enrichment of copper, silver and antimony from sulfur-containing polymetallic smelting slag

A smelting slag and multi-metal technology, applied in the field of vacuum distillation desulfurization and enrichment of copper, silver and antimony, can solve the problems of long process, difficult liquid-solid separation, high production cost, etc., and achieve the effect of strong adaptability and simplified process flow

Active Publication Date: 2017-07-07
KUNMING UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The crude lead obtained by the fire recovery process is refined, and the copper matte is recovered from the copper. The fire recovery process has high energy consumption, long process, scattered precious metals, and high production costs.
The wet recycling process produces a large amount of waste water and waste liquid, which increases the cost of sewage treatment
In addition, sulfur-containing polymetallic smelting slag will produce a large amount of lead slag during leaching, which brings great difficulties to liquid-solid separation

Method used

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  • A method for vacuum distillation desulfurization enrichment of copper, silver and antimony from sulfur-containing polymetallic smelting slag
  • A method for vacuum distillation desulfurization enrichment of copper, silver and antimony from sulfur-containing polymetallic smelting slag

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Such as figure 1 As shown, the method for enriching copper, silver and antimony by vacuum distillation desulfurization from sulfur-containing polymetallic smelting slag, its specific steps are as follows:

[0021] Put 500Kg of sulfur-containing polymetallic smelting slag raw materials directly in the vacuum furnace, turn on the vacuum pump and circulating cooling water, and pump the pressure to the ultimate vacuum of 20Pa; then turn on the heating switch to raise the temperature in the furnace to the required 1250°C, and distill at a constant temperature for 5 Hours, the pressure in the furnace is 160Pa, the primary condensate is sulfide and metal alloy, the secondary condensate is crude lead, and the residue in the crucible is naturally cooled to copper-silver-antimony alloy; after the distillation is over, turn off the heating switch and continue the cycle Cooling with cooling water, when the furnace temperature drops below 100°C, stop the furnace and open the vacuum ...

Embodiment 2

[0025] Such as figure 1 As shown, the method for enriching copper, silver and antimony by vacuum distillation desulfurization from sulfur-containing polymetallic smelting slag, its specific steps are as follows:

[0026] Put 500Kg of sulfur-containing polymetallic smelting slag raw materials directly in the vacuum furnace, turn on the vacuum pump and circulating cooling water, and pump the pressure to the ultimate vacuum of 20Pa; then turn on the heating switch to raise the temperature in the furnace to the required 1050°C, and distill at a constant temperature for 8 Hours, the pressure in the furnace is 100Pa, the primary condensate is sulfide and metal alloy, the secondary condensate is crude lead, and the residue in the crucible is naturally cooled to copper-silver-antimony alloy; after the distillation, turn off the heating switch and continue the cycle Cooling with cooling water, when the furnace temperature drops below 100°C, stop the furnace and open the vacuum furnace ...

Embodiment 3

[0030] Such as figure 1 As shown, the method for enriching copper, silver and antimony by vacuum distillation desulfurization from sulfur-containing polymetallic smelting slag, its specific steps are as follows:

[0031] Put 500Kg of sulfur-containing polymetallic smelting slag raw materials directly in the vacuum furnace, turn on the vacuum pump and circulating cooling water, and pump the pressure to the ultimate vacuum of 20Pa; then turn on the heating switch to raise the temperature in the furnace to the required 1000°C, and distill at a constant temperature for 3 Hours, the pressure in the furnace is 100Pa, the primary condensate is sulfide and metal alloy, the secondary condensate is crude lead, and the residue in the crucible is naturally cooled to copper-silver-antimony alloy; after the distillation, turn off the heating switch and continue the cycle Cooling with cooling water, when the furnace temperature drops below 100°C, stop the furnace and open the vacuum furnace ...

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Abstract

The invention relates to a method for removing sulfur and gathering copper, silver and antimony from sulfur-containing multi-metal smelting slag through vacuum distillation and belongs to the technical field of thermometallurgy and vacuum metallurgy of non-ferrous metals. Firstly, the sulfur-containing multi-metal smelting slag is placed in a vacuum furnace; distillation is conducted for 3-8 h under the conditions that the intensity of pressure in the furnace is 20-400 Pa and the distillation temperature is 1000-1250 DEG C; sulfide comprising 8-30wt% of S and metal alloy are obtained on a primary condenser; lead bullion comprising 85-95wt% of Pb and less than 2% of copper is obtained on a secondary condenser; and residues are copper, silver and antimony alloy. According to the method, the sulfur-containing multi-metal smelting slag is used as raw materials, and valuable metals of copper, silver and antimony in the sulfur-containing multi-metal smelting slag are gathered through vacuum distillation; no reagent needs to be added in the process, fractional condensation is conducted on the sulfur-containing multi-metal smelting slag through vacuum distillation, and lead bullion condensate comprising less than 2% of copper, the sulfide comprising 8%-30% of S, the metal alloy and the copper, silver and antimony alloy comprising less than 1% of Pb and less than 0.5% of S can be obtained.

Description

technical field [0001] The invention relates to a method for vacuum distillation desulfurization and enrichment of copper, silver and antimony from sulfur-containing polymetallic smelting slag, and belongs to the technical fields of nonferrous metal pyrometallurgy and vacuum metallurgy. Background technique [0002] Sulfur-containing polymetallic smelting slag is the sulfur-containing smelting slag produced in the process of crude lead smelting to remove copper and sulfur addition to remove copper. In the process of smelting and removing copper, the solubility of Cu in the lead liquid decreases with the decrease of the temperature. When the temperature of the lead liquid drops below 1225K, the precipitated crystal is not pure copper, but a copper-lead solid solution containing Pb. It floats on the surface of lead liquid in a solid state. At the same time, As and Sb in crude lead form copper-arsenic and copper-lead compounds with Cu, and almost all impurity elements such as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/04C22B11/00C22B30/02C22B15/00
CPCY02P10/20
Inventor 蒋文龙刘大春戴卫平杨斌杨崇方徐宝强熊恒李一夫速斌戴永年王宇栋
Owner KUNMING UNIV OF SCI & TECH