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A kind of brass slag recycling process

A slag and brass technology is applied in the field of brass slag recycling and reuse technology to achieve the effect of improving utilization

Active Publication Date: 2017-12-19
GUANGZHOU KECHENG ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In summary, in the prior art, although there are many methods for the treatment of brass slag, for the treatment of brass slag, usually only copper is more effectively recovered, and the copper with higher content cannot be recovered. Therefore, it is very meaningful to develop a method that can effectively recover copper and zinc components in brass slag at the same time.

Method used

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  • A kind of brass slag recycling process
  • A kind of brass slag recycling process
  • A kind of brass slag recycling process

Examples

Experimental program
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Effect test

Embodiment 1

[0053] S1 pickling

[0054] To 1000g brass slag containing 27.12% copper and 41.08% zinc, add 3480mL31% mass fraction hydrochloric acid, stir for 1 hour under the condition of circulating cooling water to keep the reaction temperature below 40°C, slowly add 700mL hydrogen peroxide, and keep the reaction temperature below 40°C. Suction filter and rinse the filter residue to obtain about 400g of filter residue; the obtained filtrate is mixed with washing water to form a copper-zinc mixed acid solution of about 3600mL, containing 75.83g / L copper and 115.49g / L zinc.

[0055] S2 synthesis of basic copper chloride

[0056] Adjust the pH of the copper-zinc mixed acid solution to 2 with 500mL of sodium hydroxide solution with a mass fraction of 50%, then add an appropriate amount of impurity remover, and react for 20 minutes to remove toxic metals such as lead, arsenic, chromium, mercury, etc., and obtain impurity removal The final copper and zinc solution is 4040mL, containing 66.6...

Embodiment 2

[0060] S1 pickling

[0061] Add 4300mL of 31% mass fraction hydrochloric acid to 1000g of brass slag containing 29.9% copper and 44.3% zinc, stir for 1 hour under the condition of circulating cooling water to keep the reaction temperature below 40°C, and slowly add 900mL hydrogen peroxide to keep the reaction temperature low at 40°C. Suction filter and rinse the filter residue to obtain about 387g of filter residue; the obtained filtrate is mixed with washing water to form a copper-zinc mixed acid solution of about 4800mL, containing 70.82g / L copper and 105.4g / L zinc.

[0062] S2 synthesis of basic copper chloride

[0063] Adjust the pH of the copper-zinc mixed acid solution to 1.5 with 450mL of sodium hydroxide solution with a mass fraction of 50%, then add an appropriate amount of impurity remover, and react for 20 minutes to remove toxic metals such as lead, arsenic, chromium, mercury, etc., and obtain impurity removal The final copper and zinc solution is 5250mL, contain...

Embodiment 3

[0067] S1 pickling

[0068] To 1000g brass slag containing 27.12% copper and 41.08% zinc, add 3480mL31% mass fraction hydrochloric acid, stir for 1 hour under the condition of circulating cooling water to keep the reaction temperature below 40°C, slowly add 700mL hydrogen peroxide, and keep the reaction temperature below 40°C. Suction filter and rinse the filter residue to obtain about 400g of filter residue; the obtained filtrate is mixed with washing water to form a copper-zinc mixed acid solution of about 3600mL, containing 75.83g / L copper and 115.49g / L zinc.

[0069] S2 synthesis of basic copper chloride

[0070] Adjust the pH of the copper-zinc mixed acid solution to 2 with 1350mL of ammonia water with a mass fraction of 20%, then add an appropriate amount of impurity remover, and react for 20 minutes to remove toxic metals such as lead, arsenic, chromium, mercury, etc., and obtain copper, 4950mL of zinc solution, containing 54.15g / L copper and 83.68g / L zinc; react the ...

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Abstract

The invention relates to a process for recycling brass furnace slag. The process for recycling the brass furnace slag includes the steps of firstly, acid leaching, secondly, basic cupric chloride synthesis and thirdly, basic zinc chloride synthesis. Due to the selection of the process, the copper element and the zinc element in the brass furnace slag are effectively recycled at the same time, and the resource use rate is increased compared with an existing method that only copper is recycled; the basic cupric chloride and the basic zinc chloride which are manufactured through the whole process meet the feed-grade standard; and waste liquid treatment cost is reduced and the process accords with the principle of recycling economy and comprehensive utilization of resources.

Description

technical field [0001] The invention relates to the field of recovery and treatment of metal smelting waste slag and solid waste, in particular to a process for recovering and reusing brass slag. Background technique [0002] Pyrometallurgy is one of the processes for producing copper by smelting ore. The slag produced per ton of copper products is about 3 to 5 tons. The amount of slag increases with the increase of copper smelting production. Brass slag generally contains 25-35% by mass of copper, 35-45% by mass of zinc, and a large amount of zinc oxide, which is a high-grade secondary resource. Today, with increasingly strict environmental protection requirements and increasingly scarce mineral resources , the comprehensive recovery and utilization of copper slag has attracted people's attention. Existing copper slag treatment technologies include the following: [0003] (1) fire treatment [0004] Patent CN201110382137 crushes copper-containing slag, mixes it with redu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/04C22B15/00C22B19/30
CPCC22B7/04C22B15/0069C22B19/30Y02P10/20
Inventor 吴阳东黄智源査正炯王皓王永成
Owner GUANGZHOU KECHENG ENVIRONMENTAL PROTECTION TECH