本厂铸工车间於一九四九年初自制一吨半冲天炉装成化铁,那时所用原料系鞍山生铁与一部分废机器生铁。而废钢仅靠本厂冷铁车间切下之废料,为数太少,遇有断面太厚或强度硬度要求较高之铸件,即感废钢不够;又因废钢收购困难。因华东一带废钢多为炼钢厂所收购,然而各地之破烂汽车等 Our foundry workshop made a ton of semi-red cupola made of iron in the beginning of 1949, when the raw materials used were Anshan pig iron and a part of the waste machinery pig iron. The only scrap steel scrap plant cut off the factory, the number is too small, in case of too thick cross-section or the hardness of the higher requirements of the casting, that scrap is not enough; and scrap acquisition difficulties. Most of the scrap in East China was acquired by the steel mills, however, while the broken cars all over the country