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Treatment method of laterite-nickel ore

A lateritic nickel ore and treatment method technology, applied in the field of smelting, can solve the problems of low grade nickel production, process environmental pollution, and low reduction temperature, and achieve the effects of increasing output and quality, wide application range, and reducing reduction temperature

Inactive Publication Date: 2014-03-26
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional methods of smelting ferronickel have the following deficiencies: the process environment is seriously polluted, the energy consumption is high, and it violates the restrictions of the national environmental protection policy and energy policy; the ore raw materials are required to have a higher nickel grade; the reduction temperature of the rotary kiln is low, Easy to form loops; low-grade finished nickel; low yield
[0003] Therefore, the current method of processing laterite nickel ore still needs to be improved

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] The raw material is laterite nickel ore with a nickel grade of 1.34% by weight and an iron grade of 17.52% by weight. According to the weight ratio of 100 parts by weight of laterite nickel ore, 10 parts by weight of coal, and 10 parts by weight of limestone, the pellets are pressed after being evenly mixed, and the pellets are dried. Put it into a rotary hearth furnace and reduce it for 20min at 1320°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 products discharged from the rotary hearth furnace are screened and crushed after water quenching, and the products smaller than 4mm are evenly fed into the jig machine to obtain Nickel-iron grains, tailings after jig sorting are wet-milled in a ball mill, the grinding concentration is controlled to 60% by weight, the particles with a grinding particle size below 0.074mm account for 38.89% by weig...

Embodiment 2

[0065] The raw material is laterite nickel ore with a nickel grade of 1.27% by weight and an iron grade of 21.85% by weight. According to the weight ratio of 100 parts by weight of laterite nickel ore, 15 parts by weight of coal, and 10 parts by weight of limestone, the pellets are pressed after being evenly mixed, and the pellets are dried. Put it into a rotary hearth furnace and reduce it for 15 minutes at 1380°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 products discharged from the rotary hearth furnace are screened and crushed after water quenching, and the products smaller than 6mm are evenly fed into the jig machine to obtain Nickel-iron pellets, the tailings after jig sorting are wet-milled in the ball mill, the grinding concentration is controlled to 50% by weight, the particles with a grinding particle size below 0.074mm account for 42...

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Abstract

The invention provides a treatment method of laterite-nickel ore. The method comprises the following steps: pelleting laterite-nickel ore, a reducer and additives to obtain laterite-nickel ore pellets; carrying out reducing roasting on the laterite-nickel ore pellets in a rotary hearth furnace to obtain a reduction product; quenching the reduction product with water; crushing the quenched reduction product; carrying out separation on the crushed reduction product by using a jigging machine to obtain nickel iron granules and tailings; and carrying out wet ball milling and wet magnetic separation on the obtained tailings to obtain nickel iron refined powder and tailings. The method can be utilized to obviously enhance the yield and quality of the product.

Description

technical field [0001] The invention relates to the field of metallurgy. In particular, the present invention relates to a lateritic nickel ore treatment method. Background technique [0002] With the wide application of stainless steel and special steel, the demand for nickel, the raw material for stainless steel production, is increasing. However, the traditional methods of smelting ferronickel have the following deficiencies: the process environment is seriously polluted, the energy consumption is high, and it violates the restrictions of the national environmental protection policy and energy policy; the ore raw materials are required to have a higher nickel grade; the reduction temperature of the rotary kiln is low, Easy to form loops; the grade of finished nickel is low; the yield is low. [0003] Therefore, the current method for processing laterite nickel ore still needs to be improved. Contents of the invention [0004] The present invention aims to solve one o...

Claims

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Application Information

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IPC IPC(8): C22B1/00C22B23/00C22B1/24C22B1/216B03B7/00
Inventor 吴道洪王静静曹志成薛逊
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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