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近一年来,我国一些大中型高炉生产不稳定,技术经济指标下滑。这与2011年上半年全国重点钢铁企业高炉运行状况一致,反应了高炉焦比和燃料比升高,喷煤比和利用系数下降等问题,给联合企业生产带来较大的负面影响。能耗大、成本升高、产量下降、经济效益下滑使企业生产压力加大。1.精料是高炉炼铁的基础国内外炼铁领域公认高炉炼铁应以精料为基础。
In the past year, some large and medium-sized blast furnaces in our country have been instable in production and their technical and economic indicators have declined. This is in line with the blast furnace operating status of key steel enterprises in the first half of 2011, reflecting the problems of higher coke ratio and fuel ratio in the blast furnace, lower PCI ratio, and lower utilization factor, which have a greater negative impact on the joint ventures’ production. Large energy consumption, rising costs, declining production and declining economic efficiency have put pressure on enterprises to increase production. 1 concentrate is the basis of blast furnace ironmaking Iron and steel industry at home and abroad is recognized blast furnace ironmaking should be based on fine material.