Abstract
A bell-less top has been installed for the fourth campaign of Chiba No. 2 blast furnace, Kawasaki Steel Corp., in consideration of its high flexibility in controlling burden distribution in the furnace. Before blowing-in, tests were conducted to obtain comprehensive information about the burden distribution by using the full-scale top for No. 2 blast furnace.ITV-system and mechanical profile meter for observing the motion and piling behavior of burden materials have been developed and installed to full utilize the flexibility of the bell-less top. Various charging patterns were tried in the actual operation. As a results, the control method of the burden distribution has been established to meet any operational requirement, either for full-capacity or reduced for the production of steel making pig iron as well as for the production of foundary pig iron. Furthermore, the charging method for small size sinter has been newly developed to reduce the overall cost of pig iron.
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