METHOD FOR MAKING CONTINUOUSLY CAST ROOFING CAST-IRON SHEET, BURDEN AND CAST IRON FOR CONTINUOUSLY CAST ROOFING SHEET, ROOFING SHEET OF CONTINUOUSLY CAST IRON (ITS VARIANT) AND PLANT FOR MAKING CONTINUOUSLY CAST ROOFING SHEET Russian patent published in 2000 - IPC

FIELD: metallurgy, namely foundry. SUBSTANCE: method is designed for making roofing sheet of cast iron made by melting and continuously casting in rolls-crystallizers for producing band and sheet subjected to subsequent heat treatment. Ready cast iron sheet has thickness 0.7-1.2 mm. Cast iron is melt in electric arc furnace from solid burden containing (mass%): cast iron (25-50); metallic concentrate (35-60); runners and recovered material- (2-10); ferromanganese (0.1-10); scrap steel or ferrosilicium -(2.5-10). Cast iron includes (mass%): carbon (2.8-3.7); silicium (2.2-2.6); manganese (0.3-0.7); nickel (0.005-0.5); chrome (0.05-0.13); copper (0.01-2.5); phosphorus- up to 0.15; sulfur - up to 0.10, ferrum - the balance. Plant for making roofing sheet includes melting aggregate, metering and pouring apparatus, rolls-crystallizers, disc shears for cutting edges, rolling stand for corrugating, rocking type pressing shears, screw-type packing apparatus for feeding metal to furnace and furnace for heat treatment. EFFECT: lowered consumption of solid cast iron at charging melts, reduced power consumption, enhanced corrosion resistance of cast iron sheet. 17 cl, 1 dwg, 1 tbl