With Agitating Or Abrading Patents (Class 75/730)
  • 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
  • Patent number: 6616730
    Abstract: It is possible to activate a physical reaction and/or a chemical reaction in a medium, comprising a solution and solid matter that is freely dispersed in said solution, by placing the mixture in a reactor that has two walls which are located opposite close to each other, whereby the mixture fills the space in between the two walls and forms therein a thin long layer in a direction that is defined by a geometrical axis parallel to the walls, by activating an agitating means that are disposed outside the reactor and capable of acting through said walls on an area of agitation covering part of the layer and having a small dimension in the direction of the geometrical axis, and by simultaneously displacing said agitating means in such a way that the area of agitation substantially spans the entire area located between the two walls.
    Type: Grant
    Filed: July 12, 2001
    Date of Patent: September 9, 2003
    Inventor: GĂ©rard Bienvenu