Patents Assigned to Yunnan Yongchang Pb&Zn Co., Ltd.
  • Purification method of zinc sulfate leachate
    Patent number: 8545690
    Abstract: A purification method of zinc sulfate leachate is provided. The purification method of zinc sulfate leachate comprises contacting the zinc sulfate leachate with a zinc powder under a non-oxidizing atmosphere to form solution containing a precipitate of impurity metal; and removing the precipitate of impurity metal from the solution and getting a purified zinc sulfate leachate. A purified zinc sulfate leachate may be prepared with a higher purification efficiency and a lower energy consumption than prior art.
    Type: Grant
    Filed: May 25, 2012
    Date of Patent: October 1, 2013
    Assignees: Yunnan Metallurgical Group Co., Ltd., Yunnan Yongchang Pb&Zn Co., Ltd.
    Inventors: Jikun Wang, Ying Dong, Guangshen He, Changwu Zhou, Guobang Zhu, Jiancun Wu