METHOD FOR ESTIMATING THE AMOUNT OF RAISED DUST OF COAL TO BE CHARGED, METHOD FOR ESTIMATING THE THICKNESS OF DEPOSITED CARBON, AND METHOD FOR OPERATING CHAMBER-TYPE COKE OVEN

摘要

PROBLEM TO BE SOLVED: To stably operate a coke oven by precisely estimating the amount of raised dust in consideration of the impact and raising dust effect of fine powder and properly estimating the thickness of deposited carbon based on the estimate.;SOLUTION: Raw material coal is classified into fine powder coal and coarse particle coal. The fine powder coal is agglomerated into agglomerated coal. The agglomerated coal and the coarse particle coal are charged into a coke oven as a coal to be charged for dry distillation. At this time, the amount Hdst (mass%) of raised dust which is raised when coal is charged is estimated by the following formula (1) and the thickness of deposited carbon is properly estimated based on the estimate: Hdst=k1[HGI]+k2+[Gv]+k3[Dp]+k4[M]+k5[OL]+k6[Mrf]+k7[Rsep]+k8[Mcp]+k9 (1), wherein HGI: grindability index of coal, Gv: gas flow rate (m/s), Dp: fineness number of coal, M: moisture content of coal (mass%), OL: oil addition rate to coal (mass%), Mrf: proportion of fine powder in coarse particle coal (mass%), Rsep: classification rate (mass%), Mcp: proportion of 0.3-1 mm in coal to be charged (mass%), and k1-k9: coefficient determined by multiple linear regression analysis.;COPYRIGHT: (C)2011,JPO&INPIT