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Method and system for processing high-iron laterite nickel ore

A technology of lateritic nickel ore and high iron, which is applied in the field of metallurgy, can solve the problems of low yield and low nickel grade, achieve the effects of reducing processing capacity, reducing acid consumption, and solving low nickel grade

Active Publication Date: 2016-09-07
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To this end, an object of the present invention is to propose a method and system for processing high-iron laterite-nickel ore, which can solve the problems of low nickel grade and low yield of products obtained by traditional smelting processes, and can effectively utilize high-iron laterite-nickel ore. Laterite nickel ore

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  • Method and system for processing high-iron laterite nickel ore
  • Method and system for processing high-iron laterite nickel ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] The high-iron laterite nickel ore (containing 1.2wt% of nickel, 0.09wt% of cobalt, and 41.2wt% of iron) is pressed according to the weight ratio of 100 parts by weight of high-iron laterite nickel ore, 10 parts by weight of coal, and 10 parts by weight of limestone. After drying, the pellets are placed in a rotary hearth furnace for reduction at 1200°C for 20 minutes, and the high-temperature flue gas discharged from the rotary hearth furnace is returned to the furnace front system for drying of laterite nickel ore raw materials and pellets. Metallized pellets are subjected to grinding and magnetic separation after water quenching to obtain ferronickel material, and the above-mentioned ferronickel material is evenly sent into a closed tank with stirring, continuously blowing air or oxygen and stirring continuously, and at the same time adding Sodium salts are used as rust catalysts to speed up the rate of selective iron removal, so that the metallic iron in the mine is "...

Embodiment 2

[0083] The high-iron laterite nickel ore (containing 1.1wt% of nickel, 0.1wt% of cobalt, and 32.2wt% of iron) is pressed according to the weight ratio of 100 parts by weight of high-iron laterite nickel ore, 15 parts by weight of coal, and 20 parts by weight of carbide slag. After drying, the pellets are put into the rotary hearth furnace and reduced for 50 minutes at 1300°C. The high-temperature flue gas discharged from the rotary hearth furnace is returned to the furnace front system for drying of laterite nickel ore raw materials and pellets, and is discharged from the discharge port. The metallized pellet products are water-quenched and then subjected to grinding and magnetic separation to obtain ferronickel-containing materials. The above-mentioned ferronickel-containing materials are evenly sent into a closed tank with stirring, continuously blowing air or oxygen and stirring continuously, and at the same time Add potassium salts as rust catalysts to speed up the rate of ...

Embodiment 3

[0085] After the high-iron laterite nickel ore (containing 0.98wt% of nickel, 0.11wt% of cobalt, and iron 34.5wt%) is mixed according to the weight ratio of 100 parts by weight of high-iron laterite nickel ore, 25 parts by weight of coal, and 25 parts by weight of lime and sodium carbonate Pressing balls, the pellets are dried and put into the rotary hearth furnace for reduction for 30 minutes at 1250°C. The high-temperature flue gas discharged from the rotary hearth furnace is returned to the furnace front system for drying of laterite nickel ore raw materials and pellets. The metallized pellet product discharged from the feed port is water-quenched and then subjected to grinding and magnetic separation to obtain ferronickel-containing material. The above-mentioned ferro-nickel-containing magnetic material is evenly sent into a closed tank with stirring, continuously blasting air or oxygen and Stir continuously, and at the same time, add sodium salts as rust catalysts to speed...

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Abstract

The invention discloses a method and system for processing high-iron laterite nickel ore. The content of iron in the high-iron laterite nickel ore is not lower than 30 wt%. The method comprises the steps that 1, the high-iron laterite nickel ore, reducing agents and additives are mixed to prepare a ball, and a mixed pellet is obtained; 2, the mixed pellet is dried, and a dried pellet is obtained; 3, the dried pellet is subjected to reducing roasting processing, and a metalized pellet is obtained; 4, the metalized pellet is subjected to water quenching processing; 5, the metalized pellet which is subjected to water quenching processing and obtained through the step 4 is subjected to ore grinding magnetic separation processing, and an iron material containing nickel and tailings are obtained; 6, the iron material containing the nickel is subjected to rusting processing, and hydrated ferric oxide and a leaching agent rich in the nickel and cobalt are obtained; and 7, the leaching agent rich in the nickel and the cobalt is subjected to separation and purification, and metal nickel and metal cobalt are obtained. By means of the method for processing the high-iron laterite nickel ore, the problems that obtained product nickel is low in grade and production rate when the high-iron laterite nickel ore is processed through a traditional smelting technology can be solved, and the high-iron laterite nickel ore can be effectively used.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, in particular, the invention relates to a method and system for processing high-iron laterite nickel ore. Background technique [0002] Nickel is an important non-ferrous metal, mainly smelted from laterite nickel ore and nickel sulfide ore. Due to the continuous increase of nickel consumption and the continuous decrease of nickel sulfide ore reserves in recent years, the development of nickel laterite ore has been paid more and more attention. The lateritic nickel ore is basically divided into two types, one is limonite type, located in the upper part of the deposit, due to the result of weathering and leaching, there is more iron, less silicon, less magnesium, lower nickel, but higher cobalt content , this kind of ore should be treated by hydrometallurgical process, and the slag produced by smelting ferronickel is used for steel production; the other type is silicon-magnesium-nickel ore, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B23/00C22B3/08C22B1/02C22B1/24
CPCC22B1/02C22B1/2406C22B23/005C22B23/043Y02P10/20
Inventor 李红科王静静宋文臣曹志成薛逊吴道洪
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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