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首钢迁安矿山采用了“细筛再磨”新工艺以后,精矿品位从64.00％提高到68.66％,矿粉中小于200网目的部分提高了15％以上,达88.50％,这样就恶化了烧结料层的透气性,随着精矿品位的提高,矿粉中的SiO_2含量降低,从8.36%降到3.44%,这就使烧结过程中形成的硅酸盐胶接相数量减少,使烧结矿强度变坏。为了解决上述问题,我厂自七八年二季度开始推行“低碳厚料”的烧结制度。两年来烧结料层从220毫米提高到300毫米,烧结矿的强度提高了,矿物组成和粒度组成得到了改善,还
Shougang Qian’an mine using “fine screen and then grinding” a new process, the concentrate grade increased from 64.00% to 68.66%, part of the ore powder less than 200 mesh increased by 15% or more, reaching 88.50%, thus worsening the sintering With the increase of concentrate grade, the content of SiO_2 in the ore powder decreases from 8.36% to 3.44%, which reduces the number of silicate cement phases formed during sintering and makes sinter The strength deteriorates. In order to solve the above problems, I plant since the second quarter of seventy-eight began to implement the “low-carbon thick material” sintering system. The sinter bed has been raised from 220 mm to 300 mm in two years, the strength of the sinter has increased, the mineral composition and the grain size have been improved, and