FIELD: metallurgy.
SUBSTANCE: proposed heater comprises water cooled scrap hopper with inclined bottom and discharge valve connected between furnace roof arch gas duct and gas duct to discharge gas from furnace through scrap contained in hopper. Hopper bottom angle of inclination to horizon in unloading position exceeds scrap angle of natural slipping of steel sheet. Hopper is furnished with two covers, its front face resting upon support with rotary hinge joints. Hopper central part rests upon said support that takes up maximum load. Hopper rear part rests upon hydraulic cylinders that serve to incline hopper load heated scrap into furnace. Unloading valve has inlet opening to feed compressed air during fusion for afterburning of carbon oxide contained in flue gas. Heater incorporates guide flume extending from below hopper bottom before discharging scrap into furnace to protect furnace side against scrap pieces falling thereon.
EFFECT: compact design, higher efficiency, lower specific power consumption.
4 cl, 1 dwg
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