Infrastructure Visakhapatnam Steel Plant
panorama view of vizag steel plant
the prepared coal charge in coal tower drawn charging car on top of batteries , charged ovens per sequence. charged coal gradually heated heating wall of oven in absence of air attain temperature of 1000°-1050 °c @ central axis of coke mass toward end of coking period. coking period specified between 16 hrs , 19 hrs depending on oven condition , production requirement. volatile matter of coal liberated during carbonization collected in gas collecting mains in form of raw coke oven gas passing through stand pipes , direct contact cooling ammonia liquor spray. gas cooled 800 °c drawn coal chemical plant exhauster. residual coke pushed out of oven pusher car through guide coke bucket. red-hot coke taken coke dry cooling plant cooling.there 4 batteries, each having 67 ovens each. each oven can hold 32 tons of dry coal charge. volumetric capacity of each oven 41.6 cum heat carbonation supplied under firing of coke oven gas having cv of 4200 kcal/nm3 of mixture of bf gas & co gas having 900 kcal/nm3. heating system of batteries of under jet, compound type having twin-heating flues re-circulation of waste gases.
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