Patents by Inventor Limei Bai

Limei Bai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Chalcopyrite ore beneficiation process and method
    Patent number: 9475067
    Abstract: The present invention relates to a mineral processing technology and method for refractory chalcopyrite ores, particularly to a mineral processing technology and method for the separation of chalcopyrite from multiple natural types of copper ores containing chalcopyrite, pyrrhotite, talc and serpentine, which belongs to the technical field of mineral processing. It's characterized by: conducting a two-stage grinding on the chalcopyrite ore, with each grinding stage followed by size grading, and treating ores in different size fractions separately, wherein coarse-grain ores are separated in the presence of xanthate, with calcium oxide and CMC controlling the pH and acting as depressor respectively, while fine-grained ores are subjected to rougher in the presence of kerosene, and subsequently subjected to cleaner in the presence of xanthate.
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: October 25, 2016
    Assignee: NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Limei Bai, Yuexin Han, Zhitao Yuan, Yuxin Ma, Guozhen Liu, Meng Li, Libing Zhao, Fusheng Niu, Jinxia Zhang
  • CHALCOPYRITE ORE BENEFICIATION PROCESS AND METHOD
    Publication number: 20160158767
    Abstract: The present invention relates to a mineral processing technology and method for refractory chalcopyrite ores, particularly to a mineral processing technology and method for the separation of chalcopyrite from multiple natural types of copper ores containing chalcopyrite, pyrrhotite, talc and serpentine, which belongs to the technical field of mineral processing. It's characterized by: conducting a two-stage grinding on the chalcopyrite ore, with each grinding stage followed by size grading, and treating ores in different size fractions separately, wherein coarse-grain ores are separated in the presence of xanthate, with calcium oxide and CMC controlling the pH and acting as depressor respectively, while fine-grained ores are subjected to rougher in the presence of kerosene, and subsequently subjected to cleaner in the presence of xanthate.
    Type: Application
    Filed: November 26, 2013
    Publication date: June 9, 2016
    Inventors: Limei Bai, Yuexin Han, Zhitao Yuan, Yuxin Ma, Guozhen Liu, Meng Li, Libing Zhao, Fusheng Niu, Jinxia Zhang