Patent number: 12030814
Abstract: A method for preparing Portland cement includes: respectively weighing iron slag, copper slag, vanadium slag, and nickel slag and grinding, to yield prefabricated iron slag, prefabricated copper slag, prefabricated vanadium slag, and prefabricated nickel slag; weighing mica and kaolinite, mixing, and grinding to obtain aluminous raw materials; evenly mixing the prefabricated iron slag and the aluminous raw materials, and calcining, to yield an iron-aluminum eutectic mineral; weighing the marble, fluorite, dolomite, and quartz, evenly mixing the marble, fluorite, dolomite, and quartz with the prefabricated copper slag, prefabricated vanadium slag, and prefabricated nickel slag to yield a first mixture; grinding the iron-aluminum eutectic mineral to yield powders, and calcining a second mixture of the first mixture and the powders, to yield the cement clinker; and cooling the cement clinker, and grinding a third mixture of the cooled cement clinker and the gypsum, to yield the Portland cement.
Type:
Grant
Filed:
May 11, 2023
Date of Patent:
July 9, 2024
Assignees:
1st Assignee: CHINA BUILDING MATERIALS ACADEMY CO., LTD., 2nd Assignee: CHINA NATIONAL BUILDING MATERIAL GROUP CO., LTD.
Inventors:
Kunyue Zhang, Xiao Zhi, Min Wang, Zhaijun Wen, Xiaopeng An, Wen Huang, Guang Yao, Yang Yu, Xin Shen