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1.前言江苏除地方骨干钢铁企业外,地、县钢铁厂小高炉较大一部分无煤、铁矿基地,生产靠的是吃“百家饭”。由于焦炭供应紧张,有些企业不得不用土焦冶炼,而土焦具有两高两低的特性(灰分高、含硫量高,固定炭低、机械强度低),使用土焦入炉易产生下列不利因素:1).易产生炉缸热制度的急剧波动,因此在生产中硅的控制比较困难(一般都控制在上限水平);
1. Introduction In addition to the local backbone of iron and steel enterprises in Jiangsu, the prefectural steel mill small blast furnace a large part of the coal-free, iron ore base, the production depends on eating “100 rice.” Due to tight supply of coke, some enterprises have to use soot coke, while coke has two characteristics of high and low (high ash, high sulfur content, low fixed carbon, low mechanical strength), the use of coke into the furnace easy to produce the following adverse Factors: 1). Easy to produce sharp fluctuations in furnace heat regime, so in the production of silicon control more difficult (usually controlled at the ceiling level);