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Pyrogenic copper smelting white smoke resource comprehensive utilization method

A technology for smelting copper and white smoke by fire method is applied in the field of comprehensive utilization of solid waste resources, which can solve the problems of worsening furnace conditions, affecting the quality of electrolytic copper products, reducing the ability of smelting furnaces to process copper ore, etc., and achieving the effect of low production cost.

Inactive Publication Date: 2017-06-13
HENAN ZHONGYUAN GOLD SMELTERY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most smelting enterprises return these white fumes to the smelting system for processing, but the accumulation of lead, arsenic and other elements will affect the quality of electrolytic copper products, and at the same time deteriorate the furnace condition and reduce the ability of the smelting furnace to process copper ore

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Add 200g of solid caustic soda into a beaker with 2000ml of water under stirring, then add 500g of white smoke dust (see Table 1 for ingredients), heat, keep warm at 95°C for 2 hours, filter and wash the filter cake with 300ml of water to obtain the filtrate (alkali leaching solution) 1955ml (see Table 2 for the composition of the alkali immersion solution).

[0034] The alkaline immersion solution is heated and evaporated, the volume of the solution is concentrated to about 1L, stop heating, and slowly cool down while stirring, sodium arsenate gradually crystallizes out, filter after the temperature drops to about 20°C, put the filter cake in an oven to dry, and obtain arsenic acid Sodium 189g, sampling analysis sodium arsenate content was 85.5%.

[0035] Add 1000ml of water to the alkali leaching residue, stir and beat, then add 55ml of 98% concentrated sulfuric acid, heat up, keep warm at 95°C for 2 hours, filter and wash the filter cake with water until the washing ...

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Abstract

The invention discloses a pyrogenic copper smelting white smoke resource comprehensive utilization method. The method comprises the following specific steps: white smoke and caustic soda are mixed in proportion; sodium sulfate is added, so that solution has a certain SO42- concentration; air is fed at 80-95 DEG C for oxidation leaching; then, the filtration is performed; and a proper amount of water is used for washing filter cakes. Filtrate has the main component of sodium arsenate, and is evaporated, condensed, cooled, crystallized, filtered and separated to obtain a sodium arsenate double salt product; and mother liquor after separation of sodium arsenate is returned to the white smoke for alkali leaching. The filter cakes in alkali leaching are pulped; sulfuric acid is added for acid leaching at 80-95 DEG C; then, the filtration is performed; the filter cakes have the main component of lead sulfate; and lead sulfate serves as a lead concentrate for lead smelting. Filtrate is copper sulfate solution; iron powder is added for replacement to obtain sponge copper; and the sponge copper is returned to a pyrogenic copper smelting system for refining as electrolyzed copper. The leaching rate of arsenic in the white smoke can reach above 95%; such precious metals as copper, lead, gold and silver are nearly not leached; the leaching rate of copper is higher than 98%; the content of lead in acid leaching slag is higher than 50%; and such precious metals as gold and silver are further enriched.

Description

technical field [0001] The invention relates to a method for comprehensive utilization of solid waste resources, in particular to a method for comprehensive utilization of pyrometallurgical copper smelting white soot resources suitable for treating white soot with the characteristics of high lead, high arsenic and low zinc. Background technique [0002] During the pyrometallurgical copper production process, the trace amount of arsenic contained in the copper concentrate is enriched in the electric field dust, which contains relatively high copper, lead, arsenic, and a certain amount of gold, silver and other precious metals. Most smelting enterprises return these white fumes to the smelting system for processing, but the accumulation of lead, arsenic and other elements will affect the quality of the electrolytic copper products, and at the same time deteriorate the furnace conditions and reduce the ability of the smelting furnace to process copper ore. Therefore, it is impo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/02C22B11/00C22B13/00C22B15/00C01G28/02
CPCC01G28/023C22B7/02C22B11/044C22B13/045C22B15/0071Y02P10/20
Inventor 张福元
Owner HENAN ZHONGYUAN GOLD SMELTERY
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