ESTIMATION METHOD FOR COKE STRENGTH

摘要

PROBLEM TO BE SOLVED: To estimate an inert factor coefficient (f) of low coalification degree coal by a simple method and estimate coke strength by using the same.SOLUTION: There is provided an estimation method of coke strength for blast furnace manufactured by using low coalification degree coal having a volatile component of 30 mass% or more and a total expansion ratio of 0% for a part of blended coal, including calculating an inert factor coefficient (f) from an expansion ratio volume (SV') measured by a rate over 3°C/min. which is a rate of temperature rise defined in JIS-M8801 and further estimating coke strength by using an inert factor (IF) calculated from the following formula (1): IF=1.00-f x, where f: the inert factor coefficient [-], x: blended rate of the low coalification degree coal [%].SELECTED DRAWING: Figure 2