Preparation status of battery grade nickel sulfate

The production and manufacture of battery-grade nickel sulfate usually fall into the following categories:

1, the preparation of nickel sulfate from metallic nickel:

The metal nickel is melted with sulfuric acid, and the crude nickel sulfate crystal is obtained after crystallization.

2. The residual nickel contained in the copper electrolysis is melted into nickel sulfate in the anode, and then the battery grade nickel sulfate crystal is obtained by removing impurities and extracting.

3. Nickel intermediates such as nickel oxide, nickel hydroxide and nickel carbonate are prepared by dissolving in sulfuric acid.

4. Preparation of nickel-containing aqueous solution in cobalt production.

5. It is prepared from nickel-containing waste.

At this stage, metal nickel is mainly used as a raw material overseas to produce battery-grade nickel sulfate, including Australia, Japan, South Korea and Taiwan, China, etc. The advantages are: pure raw materials, stable origin of raw materials, guaranteed quality and total quantity, less residues The obtained nickel sulfate crystals have high quality, clean processing, and little air pollution. The defect is: high product cost.

At this stage, our country mainly produces battery-grade nickel sulfate by other methods than metal nickel raw materials. The advantages are: raw materials come from many sources, and we try to absorb nickel raw materials in all directions, waste utilization, and low-cost production. The disadvantages are: the processing process It is not clean, it is relatively harmful to the environment, and the environmental assessment is not easy to pass, which requires the company to have corresponding strengths. In response to the increasingly strict environmental protection regulations of the country, the production of nickel sulfate in my country has a tendency to transform into metal nickel raw materials. Some The company has already started the actual operation.