WO 2018/166220 A1

Method for co-producing sulphoaluminate cement and sulfur by using desulfurized gypsum and aluminum ash

(22) 07.11.2017

(43) 20.09.2018

(57) 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 (…).

(71) Shandong University, Shandong (CN)

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