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Method for recycling valuable metal through synergistic treatment of copper slag and electroplating sludge

A technology of electroplating sludge and synergistic treatment, which is applied to the improvement of process efficiency, photography technology, instruments, etc., can solve the problems of electroplating sludge waste, high cost, and re-pollution of the environment, and achieve considerable economic benefits and reduce economic costs. Effect

Active Publication Date: 2019-01-18
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this technology will generate more solid waste, and there is a risk of re-pollution to the environment, and it is a great waste for electroplating sludge that can be used as a secondary resource, so it cannot be used as the main direction for the development of electroplating sludge technology in the future
However, the current comprehensive recovery methods for valuable metals generally have problems such as high cost, complicated operation, long process flow, and low purity of the recovered products, while the main problem of the materialization method is that the obtained products are difficult to meet the national standards

Method used

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  • Method for recycling valuable metal through synergistic treatment of copper slag and electroplating sludge

Examples

Experimental program
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Effect test

Embodiment 1

[0075] Such as figure 1 As shown, a method for cooperating copper slag and electroplating sludge of this embodiment to reclaim valuable metals comprises the following steps:

[0076] (1) After the electroplating sludge is dried (moisture in the furnace is less than 8%), it is mixed with copper slag according to a certain ratio (60% of electroplating sludge, 40% of copper slag, and the addition of coal as a reducing agent is 15% of the total mass of raw materials ), reduction smelting in the oxygen-enriched side-blowing reduction bath, reduction smelting at a temperature of 1100 ° C for 90 minutes, and reduction smelting to obtain low-priced ferrochrome slag and tin-nickel-copper alloy.

[0077] (2) Put the tin-nickel-copper alloy into the electrolytic tank for electrolysis. The composition of the electrolytic cell is: the tin-nickel-copper alloy is used as the anode plate, the copper sulfate solution is used as the electrolyte, and the pure copper is used as the cathode plate...

Embodiment 2

[0081] Such as figure 1 As shown, a method for cooperating copper slag and electroplating sludge of this embodiment to reclaim valuable metals comprises the following steps:

[0082] (1) After the electroplating sludge is dried (moisture in the furnace is less than 8%), it is mixed with copper slag according to a certain ratio (65% of electroplating sludge, 35% of copper slag, and the addition of coal as a reducing agent is 17% of the total mass of raw materials ), reduction smelting in the oxygen-enriched side-blowing reduction bath, reduction smelting at a temperature of 1200°C for 120 minutes, and reduction smelting to obtain low-priced ferrochrome slag and tin-nickel-copper alloy.

[0083] (2) Put the tin-nickel-copper alloy into the electrolytic tank for electrolysis. The composition of the electrolytic cell is: the tin-nickel-copper alloy is used as the anode plate, the copper sulfate solution is used as the electrolyte, and the pure copper is used as the cathode plate....

Embodiment 3

[0087] Such as figure 1 As shown, a method for cooperating copper slag and electroplating sludge of this embodiment to reclaim valuable metals comprises the following steps:

[0088] (1) After the electroplating sludge is dried (moisture in the furnace is less than 8%), it is mixed with copper slag according to a certain ratio (40% of electroplating sludge, 60% of copper slag, and the addition of coal as a reducing agent is 10% of the total mass of raw materials ), reduction smelting in the oxygen-enriched side-blowing reduction bath, reduction smelting at a temperature of 1100°C for 120 minutes, and reduction smelting to obtain low-priced ferrochrome slag and tin-nickel-copper alloy.

[0089] (2) Put the tin-nickel-copper alloy into the electrolytic tank for electrolysis. The composition of the electrolytic cell is: the tin-nickel-copper alloy is used as the anode plate, the copper sulfate solution is used as the electrolyte, and the pure copper is used as the cathode plate....

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Abstract

The invention discloses a method for recycling valuable metal through synergistic treatment of copper slag and electroplating sludge. The method comprises the following steps: (1) mixing the copper slag, the electroplating sludge and a reducing agent for carrying out reduction smelting, thus obtaining Sn-Ni-Cu alloy and ferrochrome slag, wherein a mass ratio of the copper slag to the electroplating sludge is (5 to 7):(10 to 12); (2) electrolyzing the Sn-Ni-Cu alloy obtained in step (1), thus obtaining electrolytic copper, tin anode slime and electrolyte; (3) concentrating and crystallizing theelectrolyte obtained in step (2), thus obtaining nickel sulfate and an electrolyzed solution, wherein the obtained electrolyzed solution is enabled to return to step (2) and be used as electrolyte for electrolysis, and the copper slag is solid waste generated during a copper smelting process of Noranda smelting pool. According to the method disclosed by the invention, the valuable metal in low-grade polymetallic copper slag and the electroplating sludge can be subjected to effective resource recycling under the situation that a slag former is not added, and meanwhile, detoxifying treatment iscarried out on toxic substances; the method has the advantages that the process route is simple, the production cost is low, no high-risk solid waste is generated, and the like.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal metallurgy, and in particular relates to a method for synergistically treating low-grade polymetallic copper slag and electroplating sludge to recover valuable metals. Background technique [0002] my country is a big copper smelting country, and its copper output ranks first in the world; at present, 95% of my country's copper is produced by pyrometallurgy, and a large amount of low-grade polymetallic copper slag will be produced during the copper smelting process. According to statistics, as of 2017, my country's The cumulative output of various types of copper slag has exceeded 25 million tons. In addition to a large amount of copper, this type of copper slag also contains valuable metals such as iron, nickel, lead, zinc, cobalt, and a small amount of precious metals such as gold and silver. This type of low-grade polymetallic copper slag has complex components. At present, the processi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04C22B7/00C22B5/10C22B15/00C22B23/00C22B25/06C25C1/12
CPCC22B5/10C22B7/00C22B7/001C22B7/006C22B7/04C22B15/0021C22B15/0089C22B23/021C22B23/0461C22B25/06C25C1/12Y02P10/20
Inventor 刘维梁超谢龙臣龙森刘正良
Owner CENT SOUTH UNIV