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化铁炼钢属全国炼钢重要组成部分。1985年全国化铁炼钢750万吨,其中:20个重点企业,地方钢厂705.33万吨;上海化铁炼钢362.3万吨,占全国的48.3％;天钢84万吨;唐钢90.7万吨;青岛、江西分别为32.7万吨和27.32万吨。全国化铁吨钢耗焦157.8kg(指入炉净焦),比1984年增加1.6kg。入炉的原料、燃料供应数量紧俏,质量差,同高炉热装铁水相比,条件较差。1985年全国炼钢化铁炉熔铁生产技术经济指标见表1。 1.化铁操作工艺改进
Iron smelting steel is an important part of the national steelmaking. In 1985, the nationwide iron-smelting steel production reached 7.5 million tons, of which: 20 key enterprises and local steel mills reached 705.33 million tons; Shanghai Shanghai Iron & Steel made 36.23 million tons of steelmaking products, accounting for 48.3% of the national total; Tintek 840,000 tons; Tangshan Steel 907,000 Ton; Qingdao, Jiangxi respectively 327,000 tons and 273,200 tons. Nationalized iron steel consumption of 157.8kg (referring to the furnace net coke), an increase of 1.6kg over 1984. Into the furnace of raw materials, the tight supply of fuel supply, poor quality, compared with hot blast hot metal, the conditions are poor. 1985 national steelmaking iron melting iron production technology and economic indicators in Table 1. 1. Iron and iron operation process improvement