Continuously tapped cupola furnace

Details Continuously tapped cupola furnace Continuously tapped cupola furnace

1980-05-29

1982-06-29

Rosenberg, P. D.

Metallurgical apparatus

Means for melting or vaporizing metal or treating liquefied...

By separating metal in a molten mass from undesired...

266221, 266236, 266232, 266900, C21B 304

Patent

active

043369227

ABSTRACT:
A hot-blast cupola furnace 1 has an inclined bottom 3 leading directly to a tapping conduit 4. The conduit 4 leads to a forehearth 5 having an iron discharge siphon 13, 14, 15 and two slag discharge siphons 16, 17. The forehearth 5 has an upper slag-holding part 10 and a lower iron-holding part 11, which also contains slag in its upper part down to the level of the tops of the siphons 16, 17. The part 10 is of greater horizontal cross-sectional area than the part 11. In this way the height of the slag column through which the iron passes in the forehearth is reduced and so is the area of the boundary layer in the forehearth. This causes the reaction between the iron and the slag to take place predominantly in the main furnace zone above the bottom 3 and not in the forehearth and in this way the life of the lining of the forehearth, which is a limiting factor on the possible continuous period of operation of the furnace, is prolonged.

REFERENCES:
patent: 1717813 (1929-06-01), Steffe
patent: 2543420 (1951-02-01), Ogg
patent: 2878011 (1959-03-01), Sherban
patent: 2892005 (1959-06-01), Lang
patent: 3539169 (1970-11-01), Higgs
patent: 3558791 (1971-01-01), Grachev
patent: 4238231 (1980-12-01), Dunks
Metallurgist No. 7/8, vol. 19, p. 492.

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