Blast furnace pressure equalizing apparatus

Metallurgical apparatus – With means treating or handling gases exhausted by treating... – By contacting gas with nonmetallic liquid

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Details

266159, C21B 700

Patent

active

040822532

ABSTRACT:
An apparatus located at the top of a blast furnace for equalizing pressure exerted by top gas, generated during operation of the blast furnace, on the bottom surface of the large bell movably mounted in the top of the blast furnace, operable so as to remove pollutants from the top gas and direct the top gas with the pollutants removed therefrom into the large bell hopper at full furnace pressure to exert equalizing pressure on the top surface of the large bell to enable opening of the large bell for feeding charge therethrough into the blast furnace. A stream of water under pressure is directed through a portion of the apparatus so as to generate continuous flow of cleaned top gas into the large bell hopper to maintain full furnace pressure therein, to prevent back flow of top gas into the apparatus upon opening of the large bell for feeding charge therethrough into the blast furnace, and to prevent the formation of pockets of stagnant gas subject to condensing, freezing or exploding due to ambient conditions thereabout. A relief valve is operable so as to vent cleaned top gas to atmosphere in the event that there is a slip in the blast furnace generating a sudden pressure surge, to efficiently relieve the pressure surge and prevent damage to the blast furnace while preventing pollution of the atmosphere.

REFERENCES:
patent: 3041059 (1962-06-01), Powell
patent: 3045996 (1962-07-01), Rice
patent: 3297432 (1967-01-01), Mohr
patent: 3343825 (1967-09-01), Tsutsumi et al.
patent: 3726065 (1973-04-01), Hausberg et al.
patent: 3735970 (1973-05-01), Genge

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