Production, Processing and Preparation of Nickel Sulfate
The production and processing of battery grade nickel sulfate usually has the following categories:
1. Preparation of nickel sulfate from metallic nickel
Use sulfuric acid to melt metallic nickel, obtain crude nickel sulfate crystals after crystallization, melt the crystals, remove residues, and then extract the liquid to obtain battery-grade nickel sulfate crystals.
2. The residual nickel often contained in the copper electrolysis method is dissolved in the nickel sulfate in the anode, and after removing the residue and carrying out the extraction, the battery grade nickel sulfate crystal is obtained.
3. Preparation of nickel intermediates such as nickel oxide, nickel hydroxide and nickel carbonate by melting in sulfuric acid.
4. Prepared from nickel-containing solution in cobalt production and processing.
5. Prepared from nickel-containing waste.
At this stage, regions such as Canada, Japan, South Korea and Taiwan mainly use metallic nickel as raw material to produce battery-grade nickel sulfate. The advantages are: authentic raw materials, stable origin of raw materials, guaranteed quality, less residue, and nickel sulfate crystals produced High quality, clean production process, environmental protection. Environmental pollution is small. The defect is: high product cost.
At this stage, in addition to metal nickel raw materials, nickel sulfate is mainly produced in other ways. The advantages of battery-grade nickel sulfate are: raw materials come from various sources, poor nickel digestion and absorption of as many nickel raw materials as possible, waste utilization, production Low-cost processing. The disadvantage is: the production process is not cleaned up, which is very harmful to the environment, the EIA is not easy to pass, and the company needs the corresponding overall strength. In response to the increasingly stringent environmental protection regulations in the country, nickel sulfate is produced in my country to produce raw materials directed metals Trend of nickel raw material conversion. Some companies have already started operations.
