Control method of and apparatus for material charging at a top o

Details Control method of and apparatus for material charging at a top o Control method of and apparatus for material charging at a top o

1991-11-26

1993-03-23

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Process control responsive to sensed condition

75387, 75469, 266 91, 266199, C21B 724

Patent

active

051960508

ABSTRACT:
In a control method of material dumping at top of a blast furnace, in which material stored in a furnace top bunker is dumped through a flow rate control gate into a blast furnace in a specified time, value of initial material weight before the transfer start, divided by the specified time is set to first target dumping speed, and opening of the flow rate control gate is feedback controlled based on the measured material weight during dumping, so that the actual dumping speed after the dumping start is coincident with the first target dumping speed, and further, if necessary, remaining material weight in the furnace top bunker on the way of dumping is actually measured and value of the remaining material weight divided by the remaining time is set to second target dumping speed, and opening of the flow rate control gate is feedback controlled, based on the measured material weight during dumping, so that the second dumping speed after the measurement of the remaining material weight is coincident with the second target dumping speed, thereby even when physical properties of the material are varied, the material can be dumped at a prescribed dumping speed with good accuracy.

REFERENCES:
patent: 4913406 (1990-04-01), Fukushima et al.
patent: 4986516 (1991-01-01), Lonardi

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