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Flash roasting treatment method for nickel laterite ores

A laterite nickel ore and flash roasting technology, applied in the metallurgical field, can solve the problems of large investment, high energy consumption, and low nickel reduction rate of products.

Active Publication Date: 2015-03-25
TIANJIN FLASH IRONMAKING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, these reduction methods all have the defects of large investment, serious gas leakage, large dust, high energy consumption, and low nickel reduction rate of the product.

Method used

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  • Flash roasting treatment method for nickel laterite ores

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as figure 1 As shown, the laterite nickel ore is crushed to obtain laterite nickel ore powder ore with a particle size of 200 microns; the temperature in the flash roaster is controlled at 1200 degrees Celsius, and pulverized coal and oxygen are added to a suspension smelting pool with a diameter of 4 meters to make Wherein the atmosphere reaches the content of the reducing gas within 60±2%; the laterite nickel ore powder ore is sprayed into the flash roasting furnace for roasting treatment.

[0032] Through calculation, it is obtained that the reduction rate of nickel and cobalt in the product reaches more than 99%, and the comprehensive energy consumption is 179.77kg standard coal / ton ore.

Embodiment 2

[0034] Such as figure 1 As shown, the laterite nickel ore is crushed to obtain laterite nickel ore powder ore with a particle size of 200 microns; the temperature in the flash roaster is controlled at 1100 degrees Celsius, and pulverized coal and oxygen are added to a suspension smelting pool with a diameter of 4 meters to make The atmosphere reaches a reducing gas content of 35±2%. The laterite nickel ore powder is sprayed into the flash roasting furnace for roasting treatment, and a mixture containing nickel-cobalt-iron alloy and ferrous oxide is obtained.

[0035] By calculation, the reduction rate of nickel and cobalt reaches more than 90%, and the comprehensive energy consumption is 130kg standard coal / ton ore.

Embodiment 3

[0037] Such as figure 1As shown, the laterite nickel ore is crushed to obtain laterite nickel ore powder ore with a particle size of 200 microns; the temperature in the flash roaster is controlled at 1000 degrees Celsius, and pulverized coal and oxygen are added to a suspension smelting pool with a diameter of 4 meters to make Wherein the atmosphere reaches a reducing gas content of 28±2%; the laterite nickel ore powder ore is sprayed into the flash roasting furnace for roasting treatment.

[0038] By calculation, the reduction rate of nickel and cobalt reaches more than 80%, and the comprehensive energy consumption is 120kg standard coal / ton ore.

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Abstract

The invention discloses a flash roasting treatment method for nickel laterite ores. The method comprises the following steps: performing roasting treatment on the nickel laterite ores in a flash roasting furnace in a reducing gas-containing atmosphere to obtain a nickel, cobalt and iron-containing product, wherein the roasting treatment is carried out at 800 to 1,200 DEG C, and the atmosphere contains less than 65 percent of reducing agent. According to the method, the flash roasting furnace is used for the roasting treatment of the nickel laterite ores, so that energy consumption can be remarkably reduced, the roasting efficiency of the nickel laterite ores can be improved, and the reduction rate of nickel is greatly increased.

Description

technical field [0001] The invention belongs to the field of metallurgy, in particular, the invention relates to a flash roasting treatment method of laterite nickel ore. Background technique [0002] The direct reduction of laterite nickel ore on the existing market mainly adopts rotary kiln, followed by rotary hearth furnace and shaft furnace. However, at present, these reduction methods all have the defects of large investment, serious gas leakage, large dust, high energy consumption, and low nickel reduction rate of the product. Therefore, there is an urgent need for further improvement on the smelting method of laterite nickel ore. Contents of the invention [0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. Therefore, an object of the present invention is to propose a flash roasting treatment method of laterite nickel ore with energy saving, high efficiency and no caking. [0004] According to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02
CPCC22B1/02
Inventor 不公告发明人
Owner TIANJIN FLASH IRONMAKING TECH CO LTD
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