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Method and system for treatment of nickel laterite ore

A technology of laterite nickel ore and cobalt nickel, applied in the field of metallurgy, can solve the problems of waste, unutilized cobalt elements, low added value of products, etc., and achieve the effect of improving purity

Pending Publication Date: 2017-07-18
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no large-scale industrial application of nickel-iron powder, and its research only stays at the level of using its briquette as a raw material for converter steelmaking or as a raw material for smelting stainless steel after melting to obtain a nickel-iron alloy. The added value of the product is not high
Moreover, the cobalt element in the laterite nickel ore has not been utilized in the whole process, resulting in waste
[0004] Therefore, the existing direct reduction roasting-grinding magnetic separation technology for laterite nickel ore needs further development

Method used

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  • Method and system for treatment of nickel laterite ore
  • Method and system for treatment of nickel laterite ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] The laterite nickel ore (0.04% Co mass fraction, 2.0% Ni mass fraction, 20% Fe mass fraction), reduced coal, limestone and sodium carbonate were mixed and formed in a weight ratio of 100:15:10:3 to obtain mixed pellets, The mixed pellets were subjected to direct reduction treatment in a rotary hearth furnace, reduction conditions: reduction temperature 1250°C, reduction time 35 minutes. Metallized pellets are obtained after the reduction, and the metallized pellets are subjected to grinding and magnetic separation after water quenching to obtain cobalt-containing nickel-iron powder (0.20% by mass fraction of Co, 6.3% by mass fraction of Ni, and 70% by mass fraction of Fe) and tailings. The cobalt-containing nickel-iron powder is subjected to oxidative sulfurization roasting, roasting conditions: SO 2 Volume concentration 5%, O 2 The volume concentration is 5%, the roasting temperature is 500°C, and the roasting time is 20 minutes. After the calcination, the sulfide ro...

Embodiment 2

[0097] The laterite nickel ore (0.1% Co mass fraction, 1.6% Ni mass fraction, 25% Fe mass fraction), reduced coal and lime were mixed and formed in a weight ratio of 100:20:3 to obtain mixed pellets, and the mixed pellets were Carry out direct reduction treatment in a rotary hearth furnace, reduction conditions: reduction temperature 1320°C, reduction time 40min. Metallized pellets were obtained after reduction, and the metallized pellets were subjected to grinding and magnetic separation after water quenching to obtain ferronickel powder (0.35% Co, 9.3% Ni, 75% Fe) and tailings. The cobalt-containing nickel-iron powder is subjected to oxidative sulfurization roasting, roasting conditions: SO 2 Volume concentration 8%, O 2 The volume concentration is 8%, the roasting temperature is 600°C, and the roasting time is 40 minutes. After the calcination, the sulfide roasted product is subjected to water immersion treatment, and after the water immersion, the solid and liquid are se...

Embodiment 3

[0099] The laterite nickel ore (0.15% Co mass fraction, 1.2% Ni mass fraction, 40% Fe mass fraction), reduced coal, slaked lime and sodium sulfate were mixed and formed in a weight ratio of 100:25:10:5 to obtain mixed pellets, The mixed pellets were subjected to direct reduction treatment in a rotary hearth furnace, reduction conditions: reduction temperature 1350°C, reduction time 20 minutes. Metallized pellets were obtained after the reduction, and the metallized pellets were subjected to grinding and magnetic separation after water quenching to obtain nickel-iron powder (0.15% by mass fraction of Co, 3.3% by mass fraction of Ni, and 80% by mass fraction of Fe) and tailings. The cobalt-containing nickel-iron powder is subjected to oxidative sulfurization roasting, roasting conditions: SO 2 Volume concentration 10%, O 2 The volume concentration is 10%, the firing temperature is 700°C, and the firing time is 60 minutes. After the calcination, the sulfide roasted product is s...

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Abstract

The invention discloses a method and system for treatment of nickel laterite ore. The method includes the steps that the nickel laterite ore, reduction coal and an addition agent are subjected to mixed forming treatment so that mixed pellets can be obtained; the mixed pellets are subjected to direct reduction treatment so that metallized pellets can be obtained; the metallized pellets are subjected to ore grinding magnetic separation treatment, and accordingly nickel / iron powder containing cobalt and tailings are obtained; the nickel / iron powder containing cobalt is subjected to oxidizing-sulphidizing roasting treatment, so that a sulphidizing roasting product is obtained; the sulphidizing roasting product is subjected to water logging treatment and solid-liquid separation, so that cobalt-nickel leaching liquor and leaching residues are obtained; and the cobalt-nickel leaching liquor is subjected to cobalt and nickel extraction treatment, and accordingly a cobalt product and a nickel product can be obtained. By the adoption of the method and system, the cobalt in the nickel laterite ore can be effectively recovered; and meanwhile the recovery rate of the nickel can be increased, and the enrichment effect of the nickel can be improved.

Description

technical field [0001] The invention belongs to the field of metallurgy, in particular, the invention relates to a method and a system for processing laterite nickel ore. Background technique [0002] As an important strategic metal, nickel has good mechanical strength, ductility and chemical stability. There are two types of nickel resources that can be mined in the world, one is sulfide deposits, and the other is laterite nickel ore. Due to the mature extraction process of sulfide ore, 60% of nickel production comes from sulfide ore. However, there are not many sulfide ore resources available for development in the world in the near future. In addition, the exploration cycle and construction cycle of sulfide ore resources are relatively long, so it is relatively difficult to develop and utilize them. It is mature and can produce various intermediate products such as nickel oxide, sulfur nickel, and ferronickel. The ore source is close to the sea and is easy to transport....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/24C22B1/02C22B23/02C22B23/00
CPCC22B1/02C22B1/24C22B23/005C22B23/021C22B23/0407C22B23/0476Y02P10/20
Inventor 宋文臣王静静李红科曹志成汪勤亚吴道洪
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST