Method of producing metal ferronickel powder and diopside slag powder

A technology of diopside and metallic nickel, which is applied in the fields of metallurgy, inorganic non-metallic materials and solid waste treatment. It can solve the problems of poor stability, red mud slag reuse restrictions, and lateritic nickel slag difficult to use. It achieves low reaction temperature, Low energy consumption, compact and efficient process flow

Pending Publication Date: 2018-05-15
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The typical characteristics of laterite nickel slag are high magnesium, high silicon, low aluminum, and low calcium. Due to the high content of MgO and poor stability, it is difficult to use laterite nickel slag.
Red mud slag is a by-product of iron extraction from red mud, and its main chemical components are CaO and SiO 2 、Al 2 o 3 、Na 2 O etc., due to Na 2 The presence of O causes many restrictions in the reuse of red mud slag

Method used

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  • Method of producing metal ferronickel powder and diopside slag powder
  • Method of producing metal ferronickel powder and diopside slag powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] The laterite nickel ore (each component and content is: Ni 1.25wt%, TFe 26.8wt%, SiO 2 38.6wt%, MgO21.2wt%), red mud (each component and content are: TFe 18.6wt%, CaO 42wt%, Al 2 o 3 18.4wt%, SiO 2 16.5wt%, Na 2 O+K 2 O 3.6wt%), dried at 105°C for 24h, and the dried material was finely ground to obtain laterite nickel ore powder and red mud powder. The laterite nickel ore powder and red mud powder are mixed to form the second mixed material, the second mixed material is composed of: 60 parts by weight of laterite nickel ore powder, 40 parts by weight of red mud powder, the second mixed material, reduced coal powder, The bentonite was mixed according to the mass ratio of 100:11:4 to obtain the first mixed material, and the first mixed material was put into a disc pelletizer to obtain pellets, and the diameter of the pellets was controlled to be 10 mm. Control of CaO, MgO, SiO in the first mixed material 2 The mass ratio is 0.5:0.5:1, while controlling (Na 2 O+K ...

Embodiment 2

[0073] The laterite nickel ore (each component and content is: Ni 1.16wt%, TFe 19.6wt%, SiO 2 42.3wt%, MgO17.65wt%), red mud (each component and content are: TFe 21wt%, CaO 41.2wt%, Al 2 o 3 11.4wt%, SiO 2 15.4wt%, Na 2 O+K 2O 2.6wt%), dried at 110° C. for 12 hours, and the dried material was finely ground to obtain laterite nickel ore powder and red mud powder. The laterite nickel ore powder and the red mud powder are mixed to form the second mixed material. The second mixed material is composed of: the laterite nickel ore powder is 65 parts by weight, and the red mud powder is 35 parts by weight. The second mixed material, reduced coal powder, The bentonite was mixed according to the mass ratio of 100:15:3 to obtain the first mixed material, and the first mixed material was put into a disc pelletizer to obtain pellets, and the diameter of the pellets was controlled to be 40mm. Control of CaO, MgO, SiO in the first mixed material 2 The mass ratio is 0.3:0.6:1, while co...

Embodiment 3

[0076] The laterite nickel ore (each component and content is: Ni 1.34wt%, TFe 24.6wt%, SiO 2 38.6wt%, MgO2 2.1wt%), red mud (each component and content are: TFe 17.5wt%, CaO 43.2wt%, Al 2 o 3 13.4wt%, SiO 2 17.8wt%, Na 2 O+K 2 O 4.6wt%), dried at 120° C. for 2 h, and the dried material was finely ground to obtain laterite nickel ore powder and red mud powder. The laterite nickel ore powder and the red mud powder are mixed to form the second mixed material. The second mixed material is composed of: the laterite nickel ore powder is 70 parts by weight, and the red mud powder is 30 parts by weight. The second mixed material, reduced coal powder, The pregelatinized starch was mixed according to the mass ratio of 100:18:4.4 to obtain the first mixed material, and the first mixed material was put into a disc pelletizer to obtain pellets, and the diameter of the pellets was controlled to be 15 mm. Control of CaO, MgO, SiO in the first mixed material 2 The mass ratio is 0.5:0...

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Abstract

The invention discloses a method of producing metal ferronickel powder and diopside slag powder. The metal ferronickel powder and magnetic separation residues are obtained through pretreatment of laterite nickel ore and red mud, material mixing and pelletizing, reducing roasting, water quenching, drying of metallized pellets, and magnetic separation, and then the diopside slag powder is obtained by conducting water-leaching sodium removal on the magnetic separation residues. According to the production method, iron and nickel resources in the laterite nickel ore and the red mud can be efficiently extracted, meanwhile, the diopside slag powder applicable to multiple purposes can be obtained, and thus the purpose of comprehensively using the laterite nickel ore and the red mud is realized.

Description

technical field [0001] The invention relates to the fields of metallurgy, inorganic non-metallic materials and solid waste treatment, in particular to a method for producing metallic nickel-iron powder and diopside slag powder. Background technique [0002] Laterite nickel ore is also called nickel oxide ore, due to Fe 2 o 3 The content is high and the appearance is red, so it is called laterite nickel ore. Laterite nickel ore is formed by long-term weathering of olivine bedrock containing nickel, iron, and magnesium silicate rocks. The upper part is generally limonite with a high degree of alteration. The ore type, the lower part is the silicon-magnesium-nickel ore with a lower degree of alteration (mainly serpentinite type), and the middle is the transition zone. Laterite ore generally contains 1%-4% nickel. It is difficult to enrich nickel element through ore dressing. Since nickel exists in the form of NiO in minerals, it is difficult to smelt nickel through convention...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/24C22B1/02B03C1/015B03C1/02C03C6/10C03C10/00C04B33/132C04B35/622
CPCB03C1/015B03C1/02C03C1/002C03C10/0063C04B33/132C04B35/62204C22B1/02C22B1/2406Y02P40/60
Inventor 陈士朝边妙莲孙辉马冬阳苏双青李亚奇陈永洲曹志成吴道洪
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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