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Title:
METHOD AND SYSTEM FOR PRODUCING LOW-ALKALINITY NEW-MINERAL-SYSTEM SULPHOALUMINATE CEMENT WITH STEEL SLAGS
Document Type and Number:
WIPO Patent Application WO/2020/211546
Kind Code:
A1
Abstract:
A method and system for producing low-alkalinity new-mineral-system sulphoaluminate cement with steel slags, comprising the following steps: uniformly mixing and homogenizing pulverized steel slags, dried desulfurized gypsum, aluminum ash and calcium carbide slags according to a set ratio; and conveying the homogenized raw materials to a rotary kiln for calcination to obtain a cement clinker, wherein the calcination temperature is 1200-1270°C, the calcination time is 20-60 min, and the homogenized cement raw material has an alkalinity coefficient of 0.81-0.9 and a Fe2O3 content of 8-13%. The method breaks through requirements for the content of calcium, aluminum and iron in production of traditional sulphoaluminate cement, and realizes a large amount of applications of the solid waste steel slags.

Inventors:
WANG XUJIANG (CN)
WANG WENLONG (CN)
LI JINGWEI (CN)
MAO YANPENG (CN)
ZHANG CHAO (CN)
WU CHANGLIANG (CN)
Application Number:
PCT/CN2020/077135
Publication Date:
October 22, 2020
Filing Date:
February 28, 2020
Export Citation:
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Assignee:
UNIV SHANDONG (CN)
International Classes:
C04B7/32; C04B7/147; C04B7/24; C04B7/36
Foreign References:
CN109987866A2019-07-09
CN106904849A2017-06-30
CN109133684A2019-01-04
CN103922622A2014-07-16
CN106365477A2017-02-01
CN106630703A2017-05-10
CN106810294A2017-06-09
CN107056102A2017-08-18
EP3081546A12016-10-19
EP3199500A12017-08-02
Attorney, Agent or Firm:
JINAN SHENGDA INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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