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Method and system for preparing nickel carbonyl powder through laterite-nickel ore

A technology of laterite nickel ore and carbonyl nickel powder, which is applied in the field of metallurgy, can solve the problems of high production cost, long natural process flow, and affecting the purity of nickel powder, and achieve the effect of reducing production cost

Active Publication Date: 2015-12-30
SHENWU TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the raw material nickel hydroxide used in this method is an industrially processed product, which does not directly occur in nature and has a long process flow and high production cost. At the same time, the method has strict restrictions on the iron content of the raw material, and the iron content must be less than 0.3%. Otherwise it will affect the purity of nickel powder

Method used

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  • Method and system for preparing nickel carbonyl powder through laterite-nickel ore
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  • Method and system for preparing nickel carbonyl powder through laterite-nickel ore

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Effect test

Embodiment 1

[0094] Get the laterite nickel ore with a nickel content of 1.45wt%, mix it with coal, limestone and industrial alkali, and then make balls and dry it. Wherein, the mixing ratio of laterite nickel ore, coal, limestone, and industrial alkali is 100:22:20: 3. The dried mixed pellets are placed in a rotary hearth furnace for reduction, the reduction condition is 1300°C, and the time is 35 minutes. The reduced metallized pellets are separated by crushing and magnetic separation to obtain nickel-iron alloy particles and tailings, and then the obtained nickel Ferroalloy particles are subjected to high-temperature atomization treatment to obtain nickel-iron powder (nickel content 8wt%, average particle size 45 μm), and then in the carbonyl reactor, the nickel-iron alloy particles are contacted with carbon monoxide and hydrogen sulfide in countercurrent to generate carbonyl-containing nickel , carbonyl iron, carbon monoxide, hydrogen sulfide first gaseous mixture, carbonylation conditi...

Embodiment 2

[0096] Get nickel content and be the laterite nickel ore of 1.7wt%, blend into coal, limestone and sodium sulfate and mix and then pelletize and dry, wherein, the mixing ratio of laterite nickel ore, coal, limestone and sodium sulfate is 100:15:13: 2. The dried mixed pellets are placed in a rotary hearth furnace for reduction, the reduction condition is 1350°C, and the time is 45 minutes. The reduced metallized pellets are separated by crushing and magnetic separation to obtain nickel-iron alloy particles and tailings, and then the obtained nickel Ferroalloy particles are subjected to high-temperature atomization treatment to obtain nickel-iron powder (nickel content 11wt%, average particle size 30 μm), and then in the carbonyl reactor, the nickel-iron alloy particles are contacted with carbon monoxide and sulfur dioxide in countercurrent to generate carbonylation reaction to generate carbonyl nickel, The first gaseous mixture of carbonyl iron, carbon monoxide and sulfur dioxid...

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Abstract

The invention discloses a method and system for preparing nickel carbonyl powder through laterite-nickel ore. The method comprises the steps that 1, the laterite-nickel ore, coal, limestone and additives are mixed and pelletized; 2, reduction treatment is carried out on mixed pellets; 3, the metallized pellets are subjected to separation treatment, and ferro-nickel particles and tailings are obtained; 4, high-temperature atomization is carried out on the ferro-nickel particles, and ferronickel powder is obtained; 5, the ferronickel powder is in contact with carbon monoxide and sulfur-containing gaseous compounds, and a first gaseous compound containing nickel carbonyl, carbonyl iron, carbon monoxide and the sulfur-containing gaseous compounds, and iron powder are obtained; 6, the first gaseous compound is purified, and gaseous nickel carbonyl and a second gaseous mixture including the sulfur-containing gaseous compounds and carbon monoxide are obtained; 7, gaseous nickel carbonyl is decomposed, and the nickel carbonyl powder and carbon monoxide are obtained. According to the method, the cheap laterite-nickel ore can be effectively utilized for preparing the high-purity nickel carbonyl powder, and therefore production cost can be remarkably reduced.

Description

technical field [0001] The invention belongs to the technical field of metallurgy. Specifically, the invention relates to a method and a system for preparing nickel carbonyl powder from laterite nickel ore. Background technique [0002] With the depletion of nickel sulfide ore, the development of laterite nickel ore has been paid more and more attention. In current industrial production, the most commonly used method for pyrometallurgy of lateritic nickel ore is the RKEF method, and the obtained product is ferronickel alloy, which is used as raw material for steelmaking. This smelting method consumes a lot of energy. Under the current market nickel price conditions, the ferronickel plant is in a state of loss-making and shutdown. The hydrometallurgy of lateritic nickel ore involves environmental pollution such as waste liquid discharge. Therefore, it is necessary to carry out innovative research on the treatment process of laterite nickel ore and develop a new process for ...

Claims

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Application Information

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IPC IPC(8): C01G53/02C22B23/02C21B13/00
Inventor 王静静宋文臣李红科曹志成薛逊
Owner SHENWU TECH GRP CO LTD
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