Study on new technology of producing Nickel and cobalt hydroxide from laterite ore
In this paper,a new process for producing nickel cobalt hydroxide from laterite ore is put forward,that is,the coarse nickel iron powder is directly reduced by fire process,and the nickel cobalt hydroxide is produced by wet treatment with crude nickel iron powder.The wet process route of"Selective leaching of coarse nickel iron with nitric acid,deep removal of iron,chromium and aluminum and nickel cobalt precipitation"produces nickel cobalt hydroxide While recovering nickel and cobalt,iron opens the circuit in the form of iron concentrate.The recovery rate of nickel,cobalt and iron in the whole wet process is 97％,98％and 95％,respectively.The technological process is short,material consumption is low,water and magnesium oxide can be recycled,basically no waste water and waste residue are discharged,and belongs to high-efficiency cleaning and metallurgical technology.
Laterite oreCoarse nickel ironSelective leaching with nitric acidNickel cobalt hydroxide
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