FIELD: metallurgy.
SUBSTANCE: furnace includes a housing formed with refractory external side, front and rear end walls, two baths restricted by bottoms, a roof and walls, two tap holes, a gas duct and a welded frame on which all parts are arranged. The walls of the furnace have external heat insulation, which consists of a double layer of asbestos-sheet cardboard. The furnace casing is laid in two rows of lightweight blocks with two layers of asbestos cardboard between the blocks, the bottoms of the two baths are made from KS-90 corundum blocks, laid on a layer of asbestos cardboard, a steel box is welded to the furnace casing and has insulation between itself and each wall, consisting of a double layer of asbestos-sheet cardboard, the roofs have a refractory heat-insulating coating over the first and second furnace baths and a double layer of refractory heat-insulating mats laid on top of them. Two side walls of the furnace are provided with four injection thirteen-mixer medium pressure burners directed to the bath bottoms at an angle, and two injection thirteen-mixer burners placed in the roof and directed to the first furnace hearth at an angle. The front end wall of the furnace has a door equipped with a hydraulic drive for lifting and lowering the furnace damper, there is one slag door in one side wall and two tap holes in the rear end wall made of quick-change taphole bricks. The furnace is equipped with an afterburning chamber lined in refractory bricks and located in the upper part of the rear wall with a six-mixer injection gas burner, installed inside the chamber and provided with an air flow control device. The furnace has an economizer, 2-stage dust and gas cleaning unit to ensure an environmentally friendly process.
EFFECT: high furnace efficiency, reduced heat and burn-off losses and possibility of ecologically clean remelting of aluminium scrap.
8 cl, 15 dwg, 1 tbl
