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1. (WO2018166220) METHOD FOR CO-PRODUCING SULPHOALUMINATE CEMENT AND SULFUR BY USING DESULFURIZED GYPSUM AND ALUMINUM ASH

Pub. No.:    WO/2018/166220    International Application No.:    PCT/CN2017/109612
Publication Date: Fri Sep 21 01:59:59 CEST 2018 International Filing Date: Wed Nov 08 00:59:59 CET 2017
IPC: C04B 7/32
C01B 32/40
C01B 17/04
Applicants: SHANDONG UNIVERSITY
山东大学
Inventors: WANG, Wenlong
王文龙
REN, Changzai
任常在
LI, Guolin
李国麟
WANG, Chaoqian
王超前
SUN, Jing
孙静
MAO, Yanpeng
毛岩鹏
ZHAO, Xiqiang
赵希强
SONG, Zhanlong
宋占龙
Title: METHOD FOR CO-PRODUCING SULPHOALUMINATE CEMENT AND SULFUR BY USING DESULFURIZED GYPSUM AND ALUMINUM ASH
Abstract:
A method for co-producing sulphoaluminate cement and sulfur by using desulfurized gypsum and aluminum ash, comprising: (1) drying aluminum ash, and heating desulfurized gypsum for dehydration to obtain semi-hydrated gypsum; (2) mixing the aluminum ash with the semi-hydrated gypsum according to a preset ratio, pulverizing, and homogenizing; (3) calcining the pulverized and homogenized mixture of the aluminum ash and the semi-hydrated gypsum while adding coal dust to the mixture, and performing oxygen-enriched combustion to obtain a sulphoaluminate cement clinker and sulfur dioxide-containing flue gas; (4) mixing the sulphoaluminate cement clinker and the desulfurized gypsum according to a ratio, and pulverizing to obtain sulphoaluminate cement; and (5) dedusting the sulfur dioxide-containing flue gas, and performing catalytic reduction to obtain a sulfur product, wherein the mass ratio of the aluminum ash to the desulfurized gypsum to carbon powder is (33-39):(61-66):1.