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近年来为了满足用户需要和提高经济效益,国内外都在研究生产低铝75％硅铁。据报道,一些铁合金厂家用兰炭部分代替或全部代替冶金焦冶炼75％硅铁,既能获得低铝产品,又能降低单位电耗,我厂在气煤焦试验的基础上吸取兄弟厂家的经验,搭用兰炭代替部分气煤焦,取得了一些成效,这在国内还属首次。 1.试验条件 1.1 原料为含SiO_298.06％、AL_2O_30.49％,粒度为25～70mm的硅石以及含铁大于95％的钢屑。所用焦炭其技术条件见表1所列。
In recent years in order to meet the needs of users and improve economic efficiency, both at home and abroad are studying the production of low-aluminum 75% ferrosilicon. It is reported that some ferroalloy manufacturers use blue carbon instead of or in part to replace 75% ferrosilicon metallurgical coke, both to obtain low-aluminum products, but also reduce the unit power consumption, I plant on the basis of gas coal charcoal learn from the brothers and manufacturers Experience, take part of charcoal to replace charcoal, achieved some success, which is the first time in China. 1. Test conditions 1.1 raw materials containing SiO_298.06%, AL_2O_30.49%, the particle size of 25 ~ 70mm silica and iron content greater than 95% of the steel scrap. Coke used in the technical conditions listed in Table 1.