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Method for refining zinc by using slag containing zinc

A technology for zinc slag and filtering slag, which is applied in the field of recovering zinc in zinc-containing slag materials, can solve problems such as waste, pollution of land resources and water resources, harmful natural environment, etc., and achieves easy implementation, simple steps, and reduced waste. Effect

Inactive Publication Date: 2009-11-18
甘肃世恒有色资源再利用有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the process of zinc smelting, a large amount of waste slag and waste water will inevitably be produced. Zinc remains in these waste slag and waste water, and metals such as copper, cadmium, nickel and cobalt are also contained. If they are discharged directly, these valuable metal elements It is wasted in vain; moreover, direct discharge of waste residue and waste water containing these metal elements will pollute land resources and water resources, which is very harmful to the natural environment

Method used

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  • Method for refining zinc by using slag containing zinc

Examples

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Effect test

Embodiment 1

[0021] Concrete process is (purification electrowinning step is the same as prior art, omits):

[0022] 1. Alkaline washing to remove chlorine

[0023] 1. Raw materials: zinc-containing slag, soda ash (Na 2 co 3 ),water

[0024] 2. Process purpose: The chlorine content in the zinc-containing slag material exceeds the standard, and directly putting it into production will cause a large amount of chlorine in the liquid to be enriched, which will seriously affect the electrolysis production. The purpose of alkali washing is to remove the chlorine adsorbed in the zinc-containing slag to meet the process requirements of electrolytic production.

[0025] 3. Process conditions: A. Control the liquid-solid ratio to 6-7:1, that is, every 6M 3 ~7M 3 Add 1 ton of zinc-containing slag to the water; B, temperature 70°C to 75°C; C, stirring reaction time: 1 hour to 2 hours; D, Na 2 co 3 The added amount is 4wt% of the amount of ZnO in the zinc-containing slag material.

[0026] 4. O...

Embodiment 2

[0040] Concrete process is (purification electrowinning step is the same as prior art, omits):

[0041] 1. Alkaline washing to remove chlorine

[0042] 1. Raw materials: zinc-containing slag, soda ash (Na 2 co 3 ),water.

[0043] 2. Process purpose: The chlorine content in the zinc-containing slag material exceeds the standard, and directly putting it into production will cause a large amount of chlorine in the liquid to be enriched, which will seriously affect the electrolysis production. The purpose of alkali washing is to remove the chlorine adsorbed in the zinc-containing slag to meet the process requirements of electrolytic production.

[0044] 3. Process conditions: A. Control the liquid-solid ratio to 7-8:1, that is, every 7M 3 ~8M 3 Add 1 ton of zinc-containing slag to the water; B, temperature 75°C to 80°C; C, stirring reaction time: 2 hours to 3 hours; D, Na 2 co 3 The added amount is 4wt% of the amount of ZnO in the zinc-containing slag material.

[0045] 4. O...

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Abstract

The invention provides a method for refining zinc by using slag containing zinc, comprising the steps of washing out chlorine by alkali, acid dipping, removing iron by mediate dipping and purifying electrodeposition. The step of washing out chlorine by alkali comprises the process of using one or a mixture of sodium carbonate, ammonium bicarbonate and sodium hydroxide to wash slag containing zinc by alkali, and then carrying out filter pressing; the step of acid dipping comprises the process of acid dipping slag by electrolytic waste liquid after the filter pressing in the step of washing out chlorine by alkali, and then carrying out filter pressing; the step of removing iron by mediate dipping comprises the process of removing iron from the acid dipping liquid in the step of acid dipping by an alum deposition method and a hydrolyzing method; the step of purifying electrodeposition comprises the process of purifying the liquid without iron after the step of removing iron by mediate dipping and then electrodepositing. The method has simple steps and easy operation, and can recycle the zinc in the slag containing zinc and metal elements such as zinc, copper, cadimium, nickel and cobalt so as to reduce waste of the sources of raw materials and protect environment.

Description

【Technical field】 [0001] The invention relates to non-ferrous metal smelting technology, in particular to a technology for recovering zinc in zinc-containing slag material. 【Background technique】 [0002] In the process of zinc smelting, a large amount of waste slag and waste water will inevitably be produced. Zinc remains in these waste slag and waste water, and metals such as copper, cadmium, nickel and cobalt are also contained. If they are discharged directly, these valuable metal elements Just waste in vain; Moreover, direct discharge of waste residue and waste water containing these metal elements will pollute land resources and water resources, which is very harmful to the natural environment. 【Content of invention】 [0003] The technical problem to be solved by the present invention is to provide a technology for recovering zinc in zinc-containing slag. [0004] In order to solve the above-mentioned technical problems, the present invention provides a method for e...

Claims

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Application Information

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IPC IPC(8): C22B19/00C22B7/04C22B3/04
CPCY02P10/20
Inventor 陆波
Owner 甘肃世恒有色资源再利用有限公司
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