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Method for producing ferronickel from lateritic nickel ores

A technology of lateritic nickel ore and ferronickel, which is applied in chemical instruments and methods, solid separation, magnetic separation, etc., can solve problems such as difficulty in mastering, low comprehensive recovery rate, complex technology, etc. Low energy consumption effect

Inactive Publication Date: 2012-07-04
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Although the above-mentioned processes have been improved to varying degrees, they may have the disadvantages of complex technology and difficult mastery, or the low comprehensive recovery rate of nickel, cobalt and iron, so they cannot comprehensively utilize laterite nickel ore.

Method used

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  • Method for producing ferronickel from lateritic nickel ores
  • Method for producing ferronickel from lateritic nickel ores

Examples

Experimental program
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Effect test

Embodiment 1

[0033]The treated lateritic nickel ore contains 1.56% nickel, 22% iron, and 3% magnesium. After grinding, 99% is less than 5mm. The mass ratio of ingredients is ore: additive: carbonaceous reducing agent = 100:30:20, sulfuric acid The mass ratio of magnesium, magnesium fluoride, and magnesium oxide is 4:3:3; the diameter of pellets is 10~15mm; the drying temperature is 100°C; the drying time is 1h; the roasting temperature is 1150°C; the roasting time is 1.5h; The intermediate product is obtained after quenching, and then finely ground by a ball mill. The ore particle size is 100% less than 74μm, and the mass concentration of the pulp is 20%. Magnetic separation under a magnetic field of 80mT yields a nickel-iron alloy containing 12.34% nickel and 72.56% iron, nickel The recovery rate is 88%.

Embodiment 2

[0035] The treated nickel laterite ore contains 1.67% nickel, 16.1% iron, and 10.5% magnesium. After grinding, 100% is less than 5mm. The mass ratio of ingredients: ore: additive: carbonaceous reducing agent = 100: 5:10; sulfuric acid in additive The mass ratio of magnesium, magnesium fluoride, and magnesium oxide is 4:3:0; the diameter of the ball is about 20mm; the drying temperature is 150°C; the drying time is 1h; the roasting temperature is 1000°C; the roasting time is 2.5h; the roasted material is quenched by water Finally, the intermediate product is obtained, and after being finely ground by a ball mill, the particle size of the ore is 100% less than 74 μm, the mass concentration of the pulp is 25%, and the nickel-iron alloy containing 10.34% of nickel and 68.56% of iron is obtained by magnetic separation under a magnetic field of 200mT. The recovery rate is 91%.

Embodiment 3

[0037] The treated nickel laterite ore contains 1.89% nickel, 26.1% iron, and 2% magnesium. After grinding, 98% is less than 5mm. The mass ratio of ingredients: ore: additive: carbonaceous reducing agent = 100:20:30, sulfuric acid in additive The mass ratio of magnesium, magnesium fluoride, and magnesium oxide is 4:3:3; the diameter of the ball is about 30mm, the drying temperature is 200°C, the drying time is 1h, the roasting temperature is 900°C, and the roasting time is 5h. The roasted material is quenched by water The intermediate product is obtained, and after being finely ground by a ball mill, the particle size of the ore is 100% less than 74 μm, the mass concentration of the pulp is 15%, and an alloy containing 10.34% nickel and 79.56% iron is obtained by magnetic separation under a magnetic field of 150mT, and the recovery rate of nickel is 95%.

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Abstract

The invention relates to a method for producing ferronickel from lateritic nickel ores, particularly a method for producing ferronickel from lateritic nickel ores by metallizing reduction roasting-magnetic separation. The method is characterized by comprising the following steps: adding additives and a carbonaceous reducing agent into lateritic nickel ores, carrying out reduction roasting, quenching with water, grinding, and carrying out magnetic separation to obtain the ferronickel alloy. In the method, the magnetic separation is directly carried out to obtain the ferronickel alloy powder with high nickel grade; the additives are added to lower the reduction temperature; not all the materials need to be heated to 1500 DEG C, thereby lowering the energy consumption; and the technique has slight influence on the environment, and thus, is an economical method for producing ferronickel from lateritic nickel ores, thereby having wide application prospects.

Description

technical field [0001] The invention relates to a method for producing ferronickel from laterite nickel ore, which relates to a method for producing ferronickel by using laterite nickel ore as raw material through metallization reduction roasting-magnetic separation. Background technique [0002] The processing technology of laterite nickel ore can be divided into two types: fire method and wet method. The pure wet process is mainly an acid leaching process, including conventional atmospheric pressure acid leaching and high temperature pressure acid leaching. The conventional atmospheric pressure acid leaching process has the disadvantages of high acid consumption and low metal recovery, while the high temperature pressure acid leaching , although the metal recovery rate has increased, there are disadvantages of high investment cost, long construction period, and insufficient technical maturity. Therefore, pyrometallurgy will still be the dominant process for processing late...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02C22B23/00C22C33/00B03C1/00
Inventor 王成彦尹飞揭晓武马保中陈永强杨卜阮书峰杨永强李强居中军张永禄
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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