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目前世界上炼铁原料主要是烧结矿和球团矿,在五十年代及六十年代,烧结矿一直处于统治地位,球团矿从六十年代开始,产量直线上升,目前世界上球团矿产量已达2—3亿吨,预计在今后十年内将成倍增长,而相反,烧结矿预计不会再有较大的增长趋势。在球团矿的生产方法中,目前主要有竖炉,带式焙烧机,链篦机——回转窑。在以上三种球团焙烧方法中,尽管竖炉法存在一些缺陷,但由于投资少,经营管理费用低,维护方便,热耗低等特点,所以总的经济成本,国外曾作过经济分析比较,以
At present, the world’s raw materials for ironmaking are mainly sinter and pellet. In the fifties and sixties, sinter was in the dominance. Since the 1960s, the pellet production has risen linearly. At present, pellets in the world Output has reached 200 million tons, is expected to double in the next decade, while on the contrary, sinter is expected to no longer have a greater growth trend. In pellet production methods, the main shaft furnace, belt roaster, grate - rotary kiln. In the above three kinds of pellet roasting method, although there are some defects in the shaft furnace method, but due to less investment, low management and maintenance costs, easy maintenance, low heat consumption, so the total economic cost, foreign economic analysis made To