Verification and Review of Rist Diagram for the Practical Heat- and Mass-Balance Calculation in a Modern Blast Furnace
(Room 404)
16 May 16
10:00 AM
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10:30 AM
Tracks:
BF Modeling, Blast Furnace Operating Improvements
The Rist-diagram was developed several decades ago and was a powerful tool to understand blast furnace (BF) operation. However, the calculation results cannot be easily applied in BF engineering, since the calculation has some extent of uncertainty due to the changes in BF operation over several decades. This article reviews the assumptions in calculation, compares the calculation results with various BF operation data, and clarifies the uncertainty. The review and comparison items are: the assumptions of the Rist-diagram (heat loss, mass loss etc.); the calculated results from the Rist-diagram (coke ratio, blast volume); and the application of heat and mass balance (BF gas amount, surface moisture of raw material). The results may be used for the improvement of the Rist-diagram, and practical heat- and mass-balance calculation in modern BFs.