Method of operating cokeless cupola

Details Method of operating cokeless cupola Method of operating cokeless cupola

1993-03-11

1994-03-15

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Process control responsive to sensed condition

75574, C22B 1100

Patent

active

052942430

ABSTRACT:
The conventional operation of a cokeless cupola furnace has a requirement for a low volume of slag to be produced, because of the fact that there is no ash from coke to remove from the charge, and the fact that flux added to the charge to form slag eats away at the furnace lining, and at the bed of refractory spheres. Running the furnace at low slag volumes makes the slag thick and can cause blockage of the slagging and tapping box. The invention adds more flux materials than is conventional, preferably including silica in the form of broken bottles, so as to deliberately increase the volume of slag, improving the flow. Care must be taken not to add too much slag-forming materials.

REFERENCES:
patent: 3802678 (1974-04-01), Taft et al.
patent: 4137071 (1979-01-01), Mrdjenovich
patent: 4896810 (1990-01-01), Maschlanka et al.
patent: 4925489 (1990-05-01), von Bogdandy et al.
Giessert-vol. 66 No. 12, Jun. 11th 1979 Dusseldorf DE. pp. 415-417. No translation available.

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