Patent ID: 8545690

Claim:
A purification method of zinc sulfate leachate, comprising: contacting the zinc sulfate leachate with a zinc powder under a non-oxidizing atmosphere to form solution containing a precipitate of impurity metal, wherein the mean particle size of the zinc powder is between 0.10 mm and 0.11 mm; and removing the precipitate of impurity metal from the solution and getting a purified zinc sulfate leachate, wherein contacting the zinc sulfate leachate with a zinc powder under a non-oxidizing atmosphere further comprising: adding the zinc sulfate leachate into a purification container; subjecting the purification container under a non-oxidizing atmosphere; and adding zinc powder to the zinc sulfate leachate with stirring, wherein the stirring speed is about 250-350 rpm, wherein the non-oxidizing atmosphere is a nitrogen atmosphere, and a pressure of the nitrogen atmosphere is 0.2-0.6 MPa, and the addition amount of the zinc powder is 60˜110 folds greater than the content of the impurity metal.