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Method for preparing high performance nickel powder using shearing and breaking process

A high-performance nickel powder technology is applied in the field of low-cost and non-polluting refinement technology to prepare nickel powder. It can solve the problems of coarse powder particles, coarse particles, and difficulty in meeting market demand. It achieves fine particles, eliminates powder particle agglomeration, low cost effect

Inactive Publication Date: 2005-04-06
长沙市维优金属材料有限公司
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the increasingly widespread industrial application of nickel powder, the demand for fine-grained or ultra-fine-grained nickel powder in various industries is increasing. However, the nickel powder prepared by the traditional redox method usually has coarse powder particles, which are difficult to obtain. To meet the needs of this broad market

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  • Method for preparing high performance nickel powder using shearing and breaking process
  • Method for preparing high performance nickel powder using shearing and breaking process

Examples

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Comparison scheme
Effect test

Embodiment 1

[0016] A dynamic rotary oxidation furnace is used to continuously oxidize the nickel foam raw material. The oxidation temperature is 860°C, the oxidation time is 15 minutes, and the rotation speed of the oxidation furnace is 25rpm. After the initial oxidation, the oxidation product is crushed by a multi-stage shear crusher, and the deformed martensitic strengthened steel Mn13 is used as the material for shearing and crushing blades in the shear crusher. The crushing time is 20 minutes, and the number of crushing stages is 2. Subsequently, the sheared and crushed product was subjected to secondary oxidation. The equipment used was a dynamic rotary oxidation furnace, the oxidation temperature was 860°C, the oxidation time was 10 minutes, and the rotation rate of the oxidation furnace was 35 rpm. The secondary oxidized nickel oxide powder is subjected to a three-stage reduction treatment using a horizontal continuous reduction furnace. The three-stage reduction temperatures are 4...

Embodiment 2

[0018] A dynamic rotary oxidation furnace is used to continuously oxidize the nickel foam raw material, the oxidation temperature is 900°C, the oxidation time is 20min, and the rotation speed of the oxidation furnace is 45rpm. After the initial oxidation, the oxidation product is crushed by a multi-stage shearing crusher, and the material used for the shearing and crushing blades in the shearing crusher is the deformed martensitic strengthened steel Mn13. The crushing time is 30 minutes, and the number of crushing stages is 3. Subsequently, the sheared and crushed product was subjected to secondary oxidation. The equipment used was a dynamic rotary oxidation furnace, the oxidation temperature was 870°C, the oxidation time was 15 minutes, and the rotation rate of the oxidation furnace was 55 rpm. The secondary oxidized nickel oxide powder is subjected to a three-stage reduction treatment using a horizontal continuous reduction furnace. The three-stage reduction temperatures are...

Embodiment 3

[0020] A dynamic rotary oxidation furnace is used to continuously oxidize the nickel foam raw material, the oxidation temperature is 950°C, the oxidation time is 30min, and the rotation speed of the oxidation furnace is 65rpm. After the initial oxidation, the oxidation product is crushed by a multi-stage shearing crusher, and the material used for the shearing and crushing blades in the shearing crusher is the deformed martensitic strengthened steel Mn13. The crushing time is 40min, and the crushing series is 4 grades. Subsequently, the sheared and crushed product was subjected to secondary oxidation. The equipment used was a dynamic rotary oxidation furnace, the oxidation temperature was 880°C, the oxidation time was 20 minutes, and the rotation rate of the oxidation furnace was 70 rpm. The secondary oxidized nickel oxide powder is subjected to a three-stage reduction treatment using a horizontal continuous reduction furnace. The three-stage reduction temperatures are 480°C, ...

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Abstract

The invention relates to a method which is adopted the shearing crushing technology to prepare for producing the nickel powder with high performance. It is gained the oxidation product of the metal nickel packed by the brittle nickel oxide after the foamed metal nickel raw material is conducted the dynamic gyration oxidation treatment. The oxidation product is conducted multistage shearing crushing by the multistage shearing crusher, and generally the number of stages is from one stage to five stages. Then the crushed powder is conducted the re-oxidation treatment to gain the nickel oxide powder with fine grain. The nickel oxide powder is conducted reduction treatment in stages by cracked ammonia. Thus the high quality metal nickel powder with high purity, fine grain, and small loosing ratio is produced. The technology can be widely applied to all of the metal powder preparations adopted the oxidation reduction method. The advantage of The invention discloses that the high quality metal nickel powder with fine grain can be prepared by, the re-oxidation and the later reduction in stages after the shearing crushing of the oxidation intermediate product. The produced metal nickel powder can be widely applied to the sintered metal product (hard alloy, diamond tool, nickel iron alloy product, nickel base product) stainless steel product, battery, and chemical industry product, and so on. The features of the invention are that the non contaminant is discharged; it is good for the environmental protection; the process flow and the cost are reduced.

Description

Technical field: [0001] The invention relates to a method for preparing nickel powder, in particular to a method for preparing nickel powder with a low-cost and pollution-free refinement technology. Background technique: [0002] Metal nickel powder is widely used in powder metallurgy products (tungsten carbide, diamond tools, nickel-iron alloy products, nickel-based products, etc.), stainless steel products, batteries and chemical products, etc. At present, the production methods used to prepare metal nickel powder mainly include redox method, electrolysis method, atomization method, and carbonyl method. Among them, the appearance of the nickel powder prepared by the electrolytic method is dendritic, the powder particles themselves have a large internal stress, and the powder compaction is poor; the nickel powder prepared by the atomization method has a high oxygen content; the nickel powder powder particles prepared by the carbonyl method Small, but toxic inorganic substa...

Claims

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Application Information

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IPC IPC(8): B22F9/04B22F9/22
Inventor 匡怡新贺跃辉
Owner 长沙市维优金属材料有限公司
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