FIELD: technological processes.
SUBSTANCE: invention relates to reflecting tandem furnace for remelting of aluminum scrap. Furnace comprises housing formed by refractory outer side, front and rear end walls, two storage baths and two inclined platforms, limited by hearth and walls, vaults, two drain tap holes, gas duct and welded frame, on which everything is arranged. In furnace there is external heat insulation of walls consisting of two layers of sheet asbestos cardboard. Two inclined platforms, two accumulation baths are laid out of bottom blocks KS-90, laid on two layers of asbestos cardboard with sandy beating, which allows to keep heat in baths of the furnace, preventing its removal to the frame. Furnace frame inside is lined with four rows of light brick and two rows of sheet asbestos cardboard, which reduce heat removal from bath through frame. Furnace casing has on top a layer with double heat-insulating coating, a layer of light-weight brick and a layer of refractory heat-insulating mats on it for additional heat preservation in the furnace. In the side walls of the furnace there are four burners. Two three-row injection 36-mixer burners are directed at angle 22° on inclined platforms and at angle of 25° to furnace axis. Two three-row injection 45-mixer burners are directed at angle of 22° on the hearth and at angle of 25° to furnace axis. Furnace has two tapholes in side walls, made in quick-change taphole bricks, two lined pivoting bowls welded to each lined chute turning through angle of 135°, for pouring metal into pouring equipment located in sector with angle of 135°, and operating window opening and lowering drive, comprising two electric motors, two couplings, two worm gearboxes, four shafts with pulleys, counterweights, ropes, chains, drums and two steel flaps lined with lightweight SHL-0.4 brick and having heat insulation consisting of three layers of asbestos cardboard sheet.
EFFECT: possibility of remelting of aluminum scrap not subjected to cutting and magnetic separation, simplification of design, low heat losses.
8 cl, 9 dwg
