METHOD OF STEEL TOP POURING Russian patent published in 2001 - IPC

FIELD: ferrous metallurgy; applicable in steel casting. SUBSTANCE: prior to pouring, placed onto stool is cone-shaped metal bulk material used in the form of pig iron chips with bulk density of 2.2-2.4 kg/sq.dm in amount of 0.13-0.30% of cast casting weight. Then steel is poured into ingot mold. During 16-20 s since starting of metal pouring, metal is poured at rate of 0.03-0.05 t/s. Further drilling of ingot molds is carried out in full stream. In so doing, upper part of pig iron chips is dissolved in the first portions of metal to cool it and promote its quick solidification. A part of chips located in burnt-out section of stool melts and welds it to prevent premature failure of stool. EFFECT: higher efficiency. 1 tbl, 1 ex