Wet process for treating lead copper matte

A wet processing, lead matte technology, applied in the direction of improving process efficiency, can solve problems such as inconvenience of operation, achieve the effects of convenient operation, improve metal leaching rate, and simple and easy process

Active Publication Date: 2012-11-21
CHENZHOU CITY JINGUI SILVER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this process can realize the selective leaching of metals and the metal recovery rate is high, but because the process conditions require high temperature and high pressure, it brings great inconvenience to the operation, so it is urgent to invent a new process to process lead matte

Method used

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  • Wet process for treating lead copper matte

Examples

Experimental program
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Effect test

Embodiment 1

[0014] Example 1: Break the lead matte block material, ball mill it until the particle size is less than 50 mesh, leaching with dilute sulfuric acid solution and sodium chloride, continuously feed pure oxygen during the leaching process, and oxidize and leaching copper. The leaching conditions: sulfuric acid concentration 1.2 mol / L, sodium chloride concentration 0.25mol / L, liquid-solid ratio 9:1, temperature 90°C, time 5h; oxygen flow rate 700mL / min. The copper leaching rate is 97.5%, while the lead remains in the slag in the form of lead sulfate and lead chloride; the leaching solution is reduced with iron filings, and the reduction conditions are: pH=1, room temperature, 1.5 times the theoretical amount of iron filings, and time 2h . The copper reduction rate is 97%, and the purity of the obtained sponge copper is 90%.

Embodiment 2

[0015] Example 2: Break the lead matte block material, ball mill it until the particle size is less than 60 mesh, leaching with dilute sulfuric acid solution and sodium chloride, continuously feed pure oxygen during the leaching process, and oxidize and leaching copper. The leaching conditions: sulfuric acid concentration 0.9 mol / L, sodium chloride concentration 0.5mol / L, liquid-solid ratio 6:1, temperature 95°C, time 3h, oxygen flow rate 600mL / min. The leaching rate of copper is 98.5%, while the lead remains in the slag in the form of lead sulfate and lead chloride; the leaching solution is reduced with iron filings, and the reduction conditions are: pH=2, room temperature, 1.8 times the theoretical amount of iron filings, and time 3h . The copper reduction rate is 97.5%, and the purity of the obtained sponge copper is 90.2%.

Embodiment 3

[0016] Example 3: Break the lead matte block material, ball mill it until the particle size is less than 50 mesh, leaching with dilute sulfuric acid solution and sodium chloride, continuously feed pure oxygen during the leaching process, and oxidize and leaching copper. The leaching conditions: sulfuric acid concentration 1.1 mol / L, sodium chloride concentration 1.0mol / L, liquid-solid ratio 8:1, temperature 85°C, time 4 h, the oxygen flow rate is 800mL / min. The leaching rate of copper is 98.5%, while the lead remains in the slag in the form of lead sulfate and lead chloride; the leaching solution is reduced with iron filings, and the reduction conditions are: pH=1, room temperature, twice the theoretical amount of iron filings, and time 2h . The copper reduction rate is 99.2%, and the purity of the obtained sponge copper is 90.2%.

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Abstract

The invention relates to a wet process for treating lead copper matte, and belongs to the field of non-ferrous metal hydro-metallurgy. In the process, the lead copper matte is treated by a normal-pressure leaching wet process; and the lead copper matte is leached by sulfuric acid and sodium oxide, and oxygen is continuously introduced in the leaching process, wherein copper is leached, and the lead in forms of lead sulfate and lead chloride is retained in residue. After the leaching process is finished, liquid-solid separation is carried out and primary separation of metals is implemented; copper-containing leachate is reduced by scrap iron to form copper sponge, and solution after reduction serves as a raw material for recycling iron; and the leaching residue returns to a lead pyrometallurgy system, and valuable elements such as lead, silver, simple sulfur substance and the like are recycled. In the wet process, solution is not discharged, the environment is protected, and the wet process belongs to clean metallurgy; the process is simple and practicable, and is convenient to operate; and the cost is low and the comprehensive recoverability is high.

Description

technical field [0001] The invention relates to a lead matte wet treatment process, which belongs to the field of nonferrous metal hydrometallurgy. technical background [0002] In the production process of oxygen bottom-blowing to blast furnace reduction lead smelting, oxygen bottom-blowing smelting and blast furnace smelting processes will produce a kind of copper sulfide, lead sulfide, ferrous sulfide, etc. in the middle layer between crude lead and slag. The eutectic of sulfide - lead matte, which generally contains 15-30% copper, 50-65% lead, 0.2-0.5% silver, 1-5% iron, and 5-15% sulfur. [0003] At present, lead matte is usually processed by fire method in large enterprises, blowing in a converter to obtain blister copper, and further refining to obtain electric copper, but this method has low metal recovery rate, long process flow and high operating cost , serious environmental pollution and other issues. And this method is difficult to miniaturize, the quantity of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/08C22B15/00
CPCY02P10/20
Inventor 谢兆凤张圣南马辉刘万里曹永贵曹永德
Owner CHENZHOU CITY JINGUI SILVER IND CO LTD
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