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一、前言生铁是氧气转炉炼钢的主要金属炉料,其质量优劣,对炼钢成本及质量均有较大影响。对生铁最佳成分的看法在不断变化,由于各国的条件不同,其成分也多种多样。 60年代国外氧气顶吹转炉的实际经验表明,为了很好的成渣、降低炉口粘结金属、减少烟尘中金属损失及粘结氧枪,生铁中锰含量必须保持在0.6～1.0％范围内。由于锰矿缺乏及成本高,在70～80年代用另外的熔剂代替吹炼初期用MnO做稀释剂。目前,苏联、西欧及日本各炼钢厂均使用含0.2％Mn的生铁炼钢。生铁中的硅含量取决于原料条件、高炉
I. Introduction Pig iron is the main converter of oxygen converter steelmaking, its quality advantages and disadvantages, have a greater impact on the cost and quality of steelmaking. The perception of the best composition of pig iron is constantly changing, and its composition is varied due to the different conditions of each country. The practical experience of foreign oxygen top-blown converters in the 1960s shows that the manganese content in pig iron must be kept in the range of 0.6-1.0% for good slag formation, reduction of the binder metal in the furnace mouth, reduction of metal loss in soot and bonding of oxygen lances . As a result of the lack of manganese ore and high cost, another flux was used instead of MnO as a diluent in the early 1980s to the 1980s. At present, steel mills containing 0.2% Mn are used in steel mills in the Soviet Union, Western Europe and Japan. The silicon content in pig iron depends on the raw material conditions, blast furnace