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A method for joint processing of copper slag and steel slag

A combined treatment and copper slag technology, applied in the field of smelting, can solve the problems of waste of water resources and large water consumption, and achieve the effect of less energy consumption and low cost

Active Publication Date: 2018-02-09
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the water consumption is large, resulting in the waste of water resources

Method used

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  • A method for joint processing of copper slag and steel slag

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Step 1, 100 parts of copper slag (Fe: 27.2%, SiO 2 : 31.5%), 50 parts of steel slag (CaO: 55.5%), 25 parts of reduced coal (C: 80.8%, S: 0.6%), 5 parts of silica (SiO 2 : 95.3%), 5 parts of bentonite are dried and finely ground to below 200 mesh and mixed and pressed into balls, the pellet size is 30mm, and the pellets are dried.

[0037] Step 2. Put the dried pellets and 28% quicklime (CaO: 88.2%) of the weight of the pellets, the quicklime particle size is 60mm, into the electric furnace for melting, and after being melted and refined for 30 minutes, a silicon-calcium-iron alloy is obtained. During the smelting process Collect the dust to obtain zinc-rich powder (ZnO: 40.2%).

Embodiment 2

[0039] Step 1, 100 parts of copper slag (Fe: 25.3%, SiO 2 : 35.5%), 60 parts of steel slag (CaO: 54.5%), 20 parts of reduced coal (C: 81.2%, S: 0.5%), 18 parts of silica (SiO 2 : 96.8%), 10 parts of bentonite are dried and finely ground to below 200 mesh and mixed and pressed into pellets, the pellet size is 40mm, and the pellets are dried.

[0040] Step 2. Put the dried pellets and 18% quicklime (CaO: 90.2%) of the weight of the pellets, and the quicklime particle size is 40mm, into an electric furnace for melting, and then refine for 40 minutes after melting to obtain a silicon-calcium-iron alloy. During the smelting process Collect the dust to obtain zinc-rich powder (ZnO: 42.3%).

Embodiment 3

[0042] Step 1, 100 parts of copper slag (Fe: 22.6%, SiO 2 : 34.8%), 70 parts of steel slag (CaO: 53.8%), 40 parts of reduced coal (C: 81.7%, S: 0.4%), 25 parts of silica (SiO 2 : 97.3%), 2 parts of bentonite are dried and finely ground to below 200 mesh and mixed to press balls, the pellet size is 60mm, and the pellets are dried.

[0043] Step 2. Put the dried pellets and 12% quicklime (CaO: 90.5%) of the weight of the pellets, the quicklime particle size is 30mm, into the electric furnace for melting, and after the melting, refine for 50min to obtain the silicon-calcium-iron alloy. During the smelting process Collect the soot to obtain zinc-rich powder (ZnO: 45.6%).

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Abstract

The invention discloses a method for combined treatment of copper slags and steel slags. The method comprises the following steps that A, copper slags, steel slags, reduction coal, silica and bentonite are dried and finely ground to 200 meshes or below, mixed to be uniform and pressed into balls, wherein the mass ratio of copper slags to steel slags to reduction coal to silica to bentonite is 100:(50-80):(20-40):(5-25):(1-10); B, the balls and quick lime are molten in an electric furnace, the mass ratio of the balls to the quick lime is 100:(10-30), refining is performed after melting down, and ferro-silicon-calcium alloy is obtained. According to the method for combined treatment of copper slags and steel slags, copper slags, steel slags, reduction coal, silica and bentonite are finely ground and then pressed into balls, the balls are dried and molten with quick lime in the electric furnace, refining is performed after melting down, copper slags and steel slags are recycled, the advantages of being low in cost and energy consumption are achieved, and ferrum, silicon, calcium and zinc elements in copper slags and steel slags are recycled.

Description

technical field [0001] The invention belongs to the technical field of smelting, in particular to a method for jointly treating copper slag and steel slag. Background technique [0002] Precious metal resources are scarce and expensive, and more and more countries around the world pay more and more attention to them. Precious metal industrial waste is a very valuable secondary resource among the precious metal resources that are increasingly scarce in the world today. Effective treatment and utilization of these industrial waste has considerable economic benefits. value. [0003] my country's copper production ranks first in the world. In the process of copper production, a large amount of copper slag is produced, and the copper slag is piled up in the slag yard, which not only occupies land but also pollutes the environment, and is a huge waste of resources. Copper slag contains a large amount of available resources, and the chemical composition of copper slag is SiO 2 : ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/04C22B1/243C22B4/06C22B19/30C22B26/20
CPCC22B1/243C22B4/06C22B7/001C22B7/04C22B19/30C22B26/20Y02P10/20
Inventor 徐刚任中山闫方兴曹志成薛逊吴道洪
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST