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Wet-process open treatment method of arsenic in copper ashes

A treatment method, copper soot technology, applied in the direction of improvement of process efficiency, etc., can solve problems such as difficulty in opening roads, air pollution, etc., and achieve the effects of simple process, low production cost, and high metal recovery rate

Active Publication Date: 2013-08-07
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, in order to reduce arsenic damage and open the way for impurities such as arsenic, some copper smelters use pre-roasting to remove arsenic to treat copper soot. The arsenic removal rate is only about 80%, and the air pollution is serious.
Some copper smelters have set up comprehensive utilization plants for soot, and use wet process to comprehensively recover valuable metals. However, in the existing wet process, arsenic is dispersed in each process, and there is also an open circuit problem.

Method used

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  • Wet-process open treatment method of arsenic in copper ashes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Copper soot chemical weight composition: lead 50%, arsenic 4.3%, nickel 0.03%, copper 5.6%, zinc 6.2%, iron 0.86%, antimony 3%, bismuth 2.18%, sulfur and oxygen, carbon 30%.

[0022] Add sodium hypochlorite and sodium hydroxide solution to the copper soot, the concentration of sodium hypochlorite solution is 8%, sodium hydroxide is 2%, the liquid-solid ratio is 15:1, the reaction is stirred for 1.5 hours, the reaction temperature is 50°C, and the dearsenized slag and dearsenized residue are obtained by filtration. After liquid, the liquid after arsenic removal is used in the next step.

[0023] The slag after arsenic removal is sent to the current soot plant to recover valuable metals such as copper, lead, zinc, and bismuth. Chemical composition of slag after arsenic removal: lead 56.99%, arsenic 0.18%, nickel 0.06%, copper 6%, zinc 6.85%, iron 0.96%, antimony 3.40%, bismuth 2.32%, sulfur 0.5%, oxygen, chlorine, sodium 20% .

[0024] The arsenic solution is used to pr...

Embodiment 2

[0026] Copper soot chemical composition: lead 10%, arsenic 5%, nickel 0.01%, copper 20%, zinc 2%, iron 1.5%, antimony 5%, bismuth 15%, sulfur and oxygen, carbon 40%.

[0027] Add sodium hypochlorite and sodium hydroxide solution to the copper soot, the concentration of sodium hypochlorite solution is 12%, sodium hydroxide is 2%, the liquid-solid ratio is 10:1, the reaction is stirred for 1 hour, and the reaction temperature is 80°C. After the arsenic removal, the solution will be used in the next step.

[0028] The slag after arsenic removal is sent to the current soot plant to recover valuable metals such as copper, lead, zinc, and bismuth. Chemical composition of slag after arsenic removal: lead 10.99%, arsenic 0.19%, nickel 0.02%, copper 23%, zinc 2.15%, iron 1.7%, antimony 5.6%, bismuth 17%, sulfur 0.9%, oxygen, chlorine, sodium 39% .

[0029] The arsenic solution is used to precipitate arsenic by ferrite method after arsenic removal, the arsenic slag is buried, and the ...

Embodiment 3

[0031] Chemical composition of copper soot: lead 60%, arsenic 2, nickel 0.1%, copper 2, zinc 7%, iron 0.5%, antimony 0.1%, bismuth 1%, sulfur and oxygen carbon 36%.

[0032] Add sodium hypochlorite and sodium hydroxide solution to the copper soot, the concentration of sodium hypochlorite solution is 4%, sodium hydroxide is 10%, the liquid-solid ratio is 20:1, the reaction is stirred for 2 hours, the reaction temperature is 60°C, and the dearsenized slag and dearsenic are obtained by filtration After liquid, the liquid after arsenic removal is used in the next step.

[0033] The slag after arsenic removal is sent to the current soot plant to recover valuable metals such as copper, lead, zinc, and bismuth. Chemical composition of slag after arsenic removal: lead 67%, arsenic 0.1%, nickel 0.06%, copper 2.3%, zinc 7.85%, iron 0.6%, antimony 1.02%, bismuth 1.12%, sulfur 0.3%, oxygen, chlorine, sodium 30% .

[0034] The arsenic solution is used to precipitate arsenic by ferrite me...

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Abstract

The invention discloses an open treatment method of arsenic in copper ashes and relates to a method for open pre-treatment of harmful arsenic impurities in intermediate material ashes in a copper smelting process. The wet-process open treatment method is characterized in that the treatment process comprises the following steps of: adding copper ashes to a solution containing sodium hypochlorite and sodium hydroxide; carrying out arsenic leaching reaction and filtering to obtain arsenic-removed slag and arsenic-removed solution; and recycling valuable metals including copper, lead, zinc and bismuth of the arsenic-removed slag. The wet-process open treatment method disclosed by the invention can be used for carrying out open treatment on the arsenic in the copper ashes before recycling the valuable metals, so that the subsequent recycling process of valuable metals is facilitated. Meanwhile, a utilization way for residual chlorine absorption liquid waste is found, so that the secondary pollution is avoided. Besides, the wet-process open treatment method for arsenic in the copper ashes is low in process cost and high in arsenic removal rate, and has great significance of improving environment protection, resource control and economical benefits.

Description

technical field [0001] An open-circuit treatment method for arsenic in copper soot relates to a method for open-circuit pretreatment of harmful arsenic impurities in soot, an intermediate material in a copper smelting process. Background technique [0002] In the process of copper smelting and production, arsenic is often an associated element of copper concentrate. Due to the fierce competition in the copper raw material market, the resources of high-quality copper concentrate with low arsenic content and other impurities are decreasing day by day. Although the state stipulates that imported copper raw materials contain less than 0.5% arsenic , but in recent years, with the continuous expansion of copper production capacity, the total amount of arsenic entering the copper smelting system is increasing. [0003] According to research, in the copper flash furnace smelting process, 37% of arsenic enters the dust; the dust of electric dust collection contains about 4-6% of arse...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/02C22B3/12C22B13/00C22B15/00C22B19/00C22B30/06C22B30/04
CPCY02P10/20
Inventor 刘玉强吕清华朱纪念王玉华张鹏孙渊君张立岩贺来荣张晗陈彩霞
Owner JINCHUAN GROUP LIMITED
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