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|Investigations were carried out of burden distribution using a full scale model of the furnace top. Various charging sequences were used and large differences were found between ore charged as sinter-pellets and as pellets-sinter. These were attributed to the differences in the angle of repose between the two materials. Permeability index was defined which was independent of the driving rate from which a furnace resistance index was obtained for use in weekly reports. Results are summarised as a single expression between blast rates and pressures and the values of Qbl and Qmax are continuously measured to aid the operators in controlling the wind rate in the safe AP region. Results also indicate a reserve in capacity of No. 7 BF.|