IMPACT OF COAL AND RICE HUSK ASH ON THE QUALITY AND CHEMISTRY OF CEMENT CLINKER
AbstractUtilization of rice husk as an alternative fuel for coal is of interest due to its availability in huge quantities in Pakistan and also because its combustion isÂ environmental pollution friendly as it generates much less SOX due to its much lower sulphur content (0.1-0.3%) compared to sulphur content in coals, particularly indeginous coals ranging from 0.6-14.8%. The purpose of present study was to examine the impact of co-firing of rice husk and coal on the quality of cement clinker so as to substitute expensive imported coal with the abundantly available cheaper rice husk to reduce the cost of production of the cement. For this investigation raw feed mix (mixture of limestone, clay, bauxite and laterite in predetermined proportions) used for cement manufacture was mixed with predetermined varying proportions of coal ash and rice husk ash and placed inside a muffle furnace at 1200oC - 1500oC i-e the temperatures prevailing in the industrial cement kilns, for various periods of time to obtain cement clinker. The quality and chemistry of cement clinker thus produced in the laboratory was experimentally studied to ensure the quality of cement clinker that would be obtained by co-firing of rice husk and coal in different proportions in industrial cement kilns as the coal ash &rice husk ash produced during combustion will get mixed with cement clinker in industrial kilns. The results indicated that there was decrease in the Lime Saturation Factor, Free Lime and Tricalcium Silicate (C3S) content and increase in the Dicalcium Silicate (C2S) content by increasing the rice husk ash and decreasing the coal ash proportion in the clinker.
How to Cite
Nawaz, S., Kanwal, S., Rahim, U., Sheikh, N., & Shahzad, khurram. (2012). IMPACT OF COAL AND RICE HUSK ASH ON THE QUALITY AND CHEMISTRY OF CEMENT CLINKER. Journal of the Pakistan Institute of Chemical Engineers, 40(1), 69–78. Retrieved from http://piche.org.pk/journal/index.php/jpiche/article/view/38
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