| abstract |
The invention discloses a method for producing battery-grade nickel sulfate by using nickel-iron alloy as raw material, and belongs to the technical field of metallurgy and chemical industry. In the method, the nickel-iron alloy is firstly dissolved in a high temperature static state, so that nickel and iron in the nickel-iron alloy react with dilute sulfuric acid to generate corresponding nickel sulfate and iron sulfate into the solution, and then filter, adjust the pH of the filtrate, and then remove iron through high temperature oxygen pressure, After iron removal, the filtrate contains rich iron oxide resources, which are used as raw materials for steelmaking; the filtrate is cyclically leached to enrich nickel sulfate. The method disclosed by the invention has the advantages of simple process, low equipment requirements, low production cost, green environmental protection, wide application range to the composition of the raw nickel-iron alloy, and can process various kinds of nickel content of 10-90% and iron content of 10-90%. Nickel-iron alloy and nickel sulfate products produced at the same time are of high quality and can be directly used in the preparation of battery materials. |