RU93035275A - ELECTRIC ARC FURNACE BATTERY LAYING FOR Smelting of Limit Ferrochrome - Google Patents

Claims (1)

The invention relates to structures for lining bathtubs of electric arc furnaces for smelting conversion ferrochrome. The purpose of the invention is the acceleration of the launch of the furnace after overhaul. The inventive in addition to the lining, made of magnesite brick, installed on the bottom in its center is an energy concentrator in the form of a cone of carbon-containing material, and the last row of magnesite bricks of the bottom of the furnace bath is covered with a carbon-containing layer of variable cross section. Due to the use of these additional elements in the design of the furnace lining, the total electrical resistance in the melt section is significantly reduced. This provides an increase in the magnitude of the electric current in this area, which leads to a concentration of electric and thermal energies in the center of the furnace bath. The device includes the last row of magnesite bricks "on the end" and the side part of magnesite bricks. An energy concentrator is installed on the magnesite row in the center of the bath. From the base of the energy concentrator to the side part, a carbon-containing layer is made of blocks of a larger section and carbon-containing blocks of a smaller section. The annular gap between the blocks is clogged with a hearth mass and is made in the form of a blind area. The surfaces of the energy concentrator and the carbon-containing layer are coated on the outside with conductive material in the form of a backfill. The tap hole of the furnace retains its design according to the prototype.