| High pure nickel powder was produced from nickel sulfate which was the by-produced in a domestic copper smelter by hydrogen reduction. The purification of nickel sulfate solution was carried out to remove impurites such as Zn, Pb, Fe, Cu and Co by solvent extraction using D2EHPA as an extractant. The purified nickel sulfate solution was reduced in a autoclave by hydrogen pressure and the effects of various additives such as (NH₄)₂CO₃, Tamol 731, and anthraquinone on the hydrogen reduction and the particle size, morphology, and purity of the nickel powder were investigated. Shpheroidal nickel powder of 99.9% purity was obtained through a series of purification, nucleation with anthraquinone, 10 densifications, and heat treatment in flowing hydrogen. |
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