Blast Furnace Burden Preparation with Reference to High Ash Coke

THE primary objectives in iron smelting are high output, low coke rate and smooth operation.
The aspect of coke economy is somewhat complex when work-ing with an iron rich burden and a high ash coke since the ash of the coke contributes a major part of the total slag.
Where, as in India, the sulphur content of ore and coke is low, the minimum workable slag volume may be taken as 350 Kg. of slag per metric ton of pig iron. It is worth noting that the Fairless works in America has successfully operated with slag volumes as low as 300 Kg. per metric ton.