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System and method of comprehensively utilizing industrial solid wastes

A technology of industrial solid waste and mixed materials, which is applied in the field of metallurgy, can solve the problems of waste of resources, costing a lot of manpower and material resources, etc., and achieve the effects of improving the environment, solving stockpiling problems, and reducing costs

Pending Publication Date: 2017-08-29
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the calcium carbide slag produced in the production process is treated as waste. Therefore, the processing of these calcium carbide slag wastes not only requires a lot of manpower and material resources, but also causes a waste of resources.

Method used

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  • System and method of comprehensively utilizing industrial solid wastes
  • System and method of comprehensively utilizing industrial solid wastes

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] This embodiment adopts figure 1 system shown and figure 2 The shown process flow prepares magnetic iron powder, as follows:

[0076] The non-ferrous metallurgical slag is made of nickel tailings in a flash furnace, and its iron content is 40.47% and sulfur content is 0.24%; the Fe content of red mud is 40.47%. 2 O 3 Content 35.33%, Na 2 O content 2.75%, K 2 O content 0.62%, TiO 2 content of 1.74%; CaO content of carbide slag is 59.77%, MgO content is 0.04%, K 2 O content 0.07%, Na 2 O content 0.05%, TiO 2 Content 0.08%.

[0077] First, the flash furnace nickel tailings and carbide slag raw materials are respectively ground to 75% below 200 mesh, and the red mud raw materials are dried to a moisture content of 8%. The three materials are mixed uniformly according to a certain proportion to make pellets. The amount of carbide slag is based on the sulfur content in the non-ferrous metallurgical slag and the SiO content in the non-ferrous metallurgical slag. 2 Th...

Embodiment 2

[0083] This embodiment adopts figure 1 system shown and figure 2 The shown process flow prepares magnetic iron powder, as follows:

[0084] The non-ferrous metallurgical slag adopts pyrometallurgical copper slag flotation tailings, and its iron content is 42.08% and sulfur content is 0.68%; the Fe content of red mud is 42.08%. 2 O 3 Content 38.28%, Na 2 O content 4.85%, K 2 O content 0.24%, TiO 2 content of 2.11%; CaO content of carbide slag is 60.01%, MgO content is 0.09%, K 2 O content 0.05%, Na 2 O content 0.02%, TiO 2 Content 0.04%.

[0085] First, the pyrometallurgical copper slag flotation tailings and carbide slag raw materials are respectively ground to 75% below 200 mesh, and the red mud raw materials are dried to a moisture content of 10%. The three materials are mixed uniformly according to a certain proportion to make pellets. The amount of carbide slag is based on the sulfur content in the non-ferrous metallurgical slag and the SiO in the metallurgical s...

Embodiment 3

[0091] This embodiment adopts figure 1 system shown and figure 2 The shown process flow prepares magnetic iron powder, as follows:

[0092] Non-ferrous metallurgical slag adopts pyrometallurgical copper slag tailings, and its iron content is 43.21% and sulfur content is 0.90%; the Fe content of red mud is 0.90%. 2 O 3 Content 37.51%, Na 2 O content 4.11%, K 2 O content 0.37%, TiO 2 content of 2.75%; CaO content of carbide slag is 57.42%, MgO content is 1.45%, K 2 O content 0.04%, Na 2 O content 0.02%, TiO 2 Content 0.06%.

[0093] First, the flotation tailings and calcium carbide slag of pyrometallurgical slag are respectively ground to 75% below 200 mesh, and the raw material of red mud is dried to a moisture content of 5%. The three materials are mixed uniformly according to a certain proportion to make pellets. The amount of carbide slag is based on the sulfur content in the non-ferrous metallurgical slag and the SiO content in the non-ferrous metallurgical slag. ...

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Abstract

The invention discloses a system and a method of comprehensively utilizing industrial solid wastes. The system includes a mixing device, which is provided with a non-ferrous metallurgical slag inlet, a red mud inlet, a carbide slag inlet, and a mixed material outlet; a shaping device, which is provided with a mixed material inlet and a pellet outlet, the mixed material inlet connected to the mixed material outlet on the mixing device; an oxidization roasting device, which is provided with a pellet inlet, an oxidizing gas inlet, and an oxidized pellet outlet, wherein the pellet inlet is connected to the pellet outlet on the shaping device; a reduction roasting device, which is provided with an oxidized pellet inlet, a reducing gas inlet and a crushed pellet outlet, wherein the oxidized pellet inlet is connected to the oxidized pellet outlet on the oxidization roasting device; a cooling device, which is provided with a crushed pellet inlet and a pulverized material outlet, wherein the crushed pellet inlet is connected to the crushed pellet outlet on the reduction roasting device; and a magnetic separation apparatus, which is provided with a pulverized material inlet, a magnetic iron powder outlet and a non-magnetic substance outlet, wherein the pulverized material inlet is connected to the pulverized material outlet on the cooling device. The produced magnetic iron powder outlet has high iron grade.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to a system and method for comprehensively utilizing industrial solid waste. Background technique [0002] Non-ferrous metallurgical slag refers to the slag produced by pyrotechnic extraction of non-ferrous metals such as copper and nickel, which contains about 40% iron, which is mainly composed of fayalite (2FeO·SiO) 2 ) in the form of, and a small amount in the form of magnetite (Fe 3 O 4 ) form exists. Since the direct reduction of fayalite is difficult, and the sulfur content in this type of metallurgical slag is generally high, if iron is extracted directly by reduction, the sulfur element will enter the iron and become a product impurity. [0003] Red mud is the most important solid residue produced after bauxite extraction of alumina. It is red because it contains a large amount of iron oxide, so it is called red mud. At present, red mud is mostly stored in open-air ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02C22B1/248C22B1/26C21B13/00
CPCC22B1/02C21B13/00C22B1/2406C22B1/248C22B1/26
Inventor 王欣刘占华陈文亮王岩丁银贵曹志成吴道洪
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST