Sulfation of Calcined Raw Meal in the Kiln Inlet Housing for the Cement Industry

Xiao Yan Li; Zhi Juan Hu; Xu Chu Ye; Wei Min Yu; Cong Xi Tao

doi:10.4028/www.scientific.net/AMR.266.98

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 266Sulfation of Calcined Raw Meal in the Kiln Inlet...

Sulfation of Calcined Raw Meal in the Kiln Inlet Housing for the Cement Industry

Abstract:

The sulfation behavior of calcined raw meal was investigated in a laboratory fix-bed reactor under conditions typically for SO2 capture in the kiln inlet housing used in cement production. The initial period is characterized with a fast-increasing conversion, while the second period shows a slow-increasing conversion. A desirable temperature exists for sulfation of calcined raw meal. A smaller particle size favors the sulfation reaction. The initial conversion rate is significantly promoted by a higher SO2 concentration. The SEM examinations show that the sulfation process involves nucleation and growth of CaSO4 grains- the sulfation product. Increasing the temperature and extending the time result in fewer but larger CaSO4 grains in the product layer.