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我厂由于入炉原燃料含S高,因而生铁S负荷是比较高的,一般在25kg/T左右。在炉况不顺,焦比高时,S负荷可高达35kg/T,所以我厂合格率低,一直达不到国家要求。1~#高炉第一代平均合格率82.10％,2~#高炉第二代平均合格率88.03％。为了提高生铁合格率,我厂一直采用高炉温(含Si在3％以上)、高碱度(CaO/SiO_21.3—1.7)冶炼铸造铁。由于长期采用这样的操作方针,因而使大量的石墨炭沉积在炉缸中,同时由于碱度过高炉渣
I plant into the furnace due to the original fuel containing S high, so pig iron S load is relatively high, generally about 25kg / T. In the furnace is not smooth, coke high, S load up to 35kg / T, so I pass low plant, has not reached the national requirements. 1 ~ # blast furnace first generation average pass rate of 82.10%, 2 ~ # blast furnace second generation average pass rate of 88.03%. In order to improve the pass rate of pig iron, our factory has been using blast furnace temperature (containing Si in more than 3%), high alkalinity (CaO / SiO_21.3-1.7) smelting cast iron. Due to the long-term use of such guidelines, so a lot of graphite carbon deposition in the hearth, and due to the high alkalinity slag