Method for efficiently concentrating cobalt and nickel from low-grade nickeliferous laterite ore

A laterite nickel ore and low-grade technology, applied in chemical instruments and methods, wet separation, magnetic separation, etc., can solve the problems of high operating cost and large investment, and achieve high reaction efficiency, short investment cycle, and quick results Effect

Inactive Publication Date: 2009-08-26
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the above-mentioned several processes all have large investment and high operating costs, and are only suitable for processing laterite ores with higher nickel content (nickel ≥ 1.5%)

Method used

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  • Method for efficiently concentrating cobalt and nickel from low-grade nickeliferous laterite ore
  • Method for efficiently concentrating cobalt and nickel from low-grade nickeliferous laterite ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A. Control the moisture content of the mineral material to be less than 15%, crush it, grind it finely, and pass it through a 100-mesh sieve;

[0036] B. Add 80kg of calcium chloride, 60kg of coal powder, and 30kg of sodium chloride per 1 ton of dry mineral powder, mix well, add appropriate amount of water to moisten, and press into balls with a diameter of 18mm; air cool to remove part of the water;

[0037] C. Add 80kg of magnesium chloride and 80kg of anthracite for every 1 ton of ore balls, and mix them into the roaster;

[0038] D. Control the roasting temperature to 980°C and the roasting time to 40 minutes to roast the material;

[0039] E. Crushing the roasted material, wet grinding, and passing through a 200-mesh sieve; wet magnetic separation, the selected magnetic field strength is 2200 Gauss, and the sweeping magnetic field strength is 3200 Gauss;

[0040] F. Roasting flue gas purification and absorption treatment.

[0041] Through the control of the above...

Embodiment 2

[0043] A. Control the moisture content of the mineral material to be less than 15%, crush it, grind it finely, and pass it through a 100-mesh sieve;

[0044] B. Add 20kg of sodium chloride, 85kg of magnesium chloride, 50kg of coal powder, and 25kg of calcium oxide per 1 ton of dry mineral powder, mix well, add appropriate amount of water to moisten, and granulate into balls with a diameter of 25mm; remove the part by air cooling moisture;

[0045] C. Add 180kg of ferric chloride and 100kg of anthracite for every 1 ton of ore balls, and mix them into the roaster;

[0046] D. Control the roasting temperature to 920°C and the roasting time to 80 minutes to roast the material;

[0047] E. Crushing the roasted material, wet grinding, and passing through a 200-mesh sieve; wet magnetic separation, the selected magnetic field strength is 2400 Gauss, and the sweeping magnetic field strength is 3350 Gauss;

[0048] F. Roasting flue gas purification and absorption treatment.

[0049] ...

Embodiment 3

[0051] A. Control the moisture content of the mineral material to be less than 15%, crush it, grind it finely, and pass it through a 100-mesh sieve;

[0052] B. Add 30kg of sodium chloride, 60kg of magnesium chloride, 50kg of coal powder, and 30kg of calcium oxide per 1 ton of dry mineral powder, mix evenly, add appropriate amount of water to moisten, and pelletize into balls with a diameter of 28mm; remove the part by air cooling moisture;

[0053] C. Add 50kg of magnesium chloride, 120kg of ferric chloride, and 85kg of anthracite for every 1 ton of ore balls, and mix them into the roaster;

[0054] D. Control the roasting temperature to 880°C and the roasting time to 90 minutes to roast the material;

[0055] E. Break the roasted material, add 1860 grams of copper nitrate per ton of material, add water to wet grind and activate the material; control the liquid-solid ratio 4:1, add water and milk of lime, and adjust the pH to 10.2; press "one rough one Flotation is carried ...

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Abstract

The invention provides a method for efficiently concentrating cobalt and nickel from a low-grade nickeliferous laterite ore. The method is based on mine-phase reconstruction, and the ore is subject to physical treatment, high temperature chlorination and reduction roasting to convert the nickel and the cobalt in the ore from oxide or composite oxide (silicate and ferrite) mineral into magnetic metal or alloy, magnetic separation method or combined floatation-magnetic separation method is used for separation to concentrate the cobalt and the nickel. The method is used for treating the low-grade nickeliferous laterite ore (Ni is 0.2-2.0%), contents of the nickel ore concentrate is more than ten times of that of the crude nickel ore; and the nickel recovery is more than 80%.

Description

technical field [0001] The invention belongs to the field of nonferrous metallurgy, and relates to a method for extracting nickel from nickel ore, in particular to a method for enriching nickel and cobalt from low-grade laterite nickel ore. Background technique [0002] Nickel is a metal with abundant reserves on the earth. The world's terrestrial nickel reserves are about 470 million tons, of which 60% belong to lateritic nickel deposits, and 40% belong to magmatic copper-nickel sulfide deposits. At present, the nickel produced by the world's nickel industry mainly comes from nickel sulfide ore resources, accounting for about 60% to 65% of the total output, and the rest comes from nickel oxide ore. However, with the depletion of nickel sulfide ore on the earth, the proportion of nickel produced from nickel oxide ore is increasing rapidly. It is estimated that by 2010 the production of nickel from nickel oxide ore will exceed the production of nickel from nickel sulphide or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B23/02C22B1/16C22B1/24B03C1/00B03B7/00
Inventor 胡启阳李新海王志兴郭华军
Owner CENT SOUTH UNIV
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