Method for preparing high performance metallic nickel powder using electrochemical passivation-loosing process

Abstract

The invention relates to method which is adopted the electrochemistry purification-loosing to prepare the metal nickel powder. It prepares the high performance metal nickel powder by adopting the electrochemistry purification-loosing processing technology at first, then the oxidation reduction technology. The method is adopts the metal nickel plate with high purity to gain the foamed metal nickel with high porosity and purity after the processing of the electrochemistry purification-loosing. The foamed metal nickel is conducted oxidation treatment with dynamic gyration. The brittle nickel oxide foam is gained after the oxidation. Then the foamy nickel oxide is conducted multistage shearing crushing; the nickel oxide powder with different granularity is gained after the classification by sedimentation method. The nickel oxide powder is conducted reduction treatment in stages by cracked ammonia. Thus the high quality metal nickel powder with high purity, fine crystal grain, and small loosing ratio is produced. The advantages 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; and it can ensure the production of gaining the metal nickel powder with high performance. The metal nickel powder with high performance produced by the preparation method 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.

Description

Technical field: [0001] The invention relates to a preparation method of metal nickel powder. In particular, it relates to a method for preparing high-quality metal nickel powder by using a metal nickel plate. 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. At present, the production methods used to prepare metal nickel powder mainly include redox method, electrolysis method, atomization method, carbonyl method and liquid phase reduction method. These preparation methods themselves often have the following disadvantages: 1. The technological process is too complicated, which increases the production cost and is not conducive to market competition; 2. There are intermediate product discharges or toxic substances in the preparation process, which cause environmental pollution; 3. ...

AI Technical Summary

Problems solved by technology

These preparation methods themselves often have the following disadvantages: 1. The technological process is too complicated, which increases the production cost and is not conducive to market competition; 2. There are intermediate product discharges or toxic substances in the preparation process, which cause environmental pollution; 3. The prepared High-quality nickel powder often has the disadvantages of high porosity ratio, coarse crystal grains, and low purity, so it is difficult to be well used in the above-mentioned industrial fields.