Cement and Energy

Miscellaneous problems faced, remedial actions taken and the results achieved are as under : Problem Action taken Result a. CIS (Control Impact Systems) incorporated in cooler b. Grate area increased from High ctinker temperature 60.38 sq/m to 69 sq/m Clinker temperature reduced to 120° C from 200° C c. Bag house replaced by ESP in cooler section d. TA duct area increased From 11 2.85 kWh/ t of cement in 1994-95, the plant's powerconsumption has reduced to 87 kWh/t cement, which very well matches world benchmark. The evolution of this decline is depicted in Fig. I. to the use of imported coal. which would extend the available limestone reserve for a longer period. Thus on the targeted val ues of potential clinker moduli values and phase composition. the 111odified standard raw mix design has given substantial increase in production at every stage. 120 115 112.85 110 c 105 .. E ~ 100 ~ :;: .>t. 95 90 85 80 94·95 95·96 96·97 97·98 98·99 Mar ·99 Fig 1 Decline in power consumption from 1994-95 to 1998-99 Environment The plant has not lagged behind on the environmental front either. Its stack emission which is maintai ned below 50 mg/ m 3 well compares with the limits in the developed countries. For better efficiency in dedusting, the purging sequence of bag hou e has been changed and the modules in bag house increased. The plant has been maintaining a noise level below 80 dB. otable among the measures taken for nurturing ecology arc massive plantation and converti ng solid waste into manure. Qualit~· Control Vertical Roller Mill Conclusion The single-component raw mix design to suit Indian fuel has been changed to a multi component one for adapting In sum. the plant today can boast of energy consumption close to world benchmarks, i.e. 715 kcal/kg clinker and 87 kWh/t cement. Courtesy : Laksl!mi Cement 4