我厂原用冲天炉熔炼铬钼铜合金铸铁,生产各种不同规格的活塞环。用冲天炉熔炼活塞环合金铸铁,对原材料(新生铁、废钢、焦炭等)质量要求高,炉内加入铁屑有困难,铁水化学成份和温度难以控制,铸件废品率高。遵照伟大领袖毛主席关于“我们必须打破常规,尽量采用先进技术,在一个不太长的历史时期内,把我国建设成为一个社会主义的现代化的强国”的教导,于一九七一年七月我厂制造成 Our factory used the cupola to melt chromium, molybdenum and copper alloy cast iron, producing a variety of different specifications of the piston ring. The use of cupola melting piston ring alloy cast iron, raw materials (new iron, scrap, coke, etc.) high quality requirements, the furnace is difficult to add iron filings, hot metal chemical composition and temperature control difficult to cast a high rejection rate. In accordance with the teachings of Chairman Mao, the great leader, on “We must break the routine, try to adopt advanced technology and, in a not too long historical period, turn our country into a powerful modern socialist nation”, in July 1991 I plant made into