Phase Analysis of Nickel in Nickel Ore

Nickel in such phases as nickel sulfate,nickeleous oxide,nickel sulfide and nickel silicate are analyzed respectively in the analysis methods.These analysis methods are as follows: Nickel sulfate was leached using sodium acetate and sodium sulfite.Nickeleous oxide was leached using citric acid.Then nickel sulfate and nickel sulfide are leached using saturated bromine water.At last,nickel silicate in the residue was determined.