Six kinds of cement raw material were matched to use different coal gangues and different limestones in order to obtain the calcine thermal condition and the reasonable prescription of the gangue instead of clay ingredient which was applied to the cement production. Experiments were conducted under different temperatures in the laboratory chamotte calcine test platform. For the samples of the calcined cement clinker, their mass fractions of free-CaO were measured, and their mineral components were qualitatively analyzed by X-ray diffraction (XRD). Results show that qualified cement clinker can be generated by the utilization of coal gangue instead of clay mixed with middle-calcium limestone, high and middle-calcium limestone; the calcinations temperature are at least lower 50 ℃ than that of clay ingredients, while the high-calcium limestone has no obvious change. A high grade cement clinker can be calcined by mixing the coal gangue with middle-calcium limestone or high and middle-calcium limestone.
QIU Guo-Hua, SHI Zheng-Lun, TU Chun-Jiang, et al. Experimental research on utilization of coal gangue as clay for optimized formula on cement clinker calcination. J4, 2010, 44(2): 315-319.
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