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为提高焦丁和小烧结矿利用率,通过理论分析和实验研究了唐钢3 200m~3高炉焦丁混装对煤气利用的影响和大小烧结矿分装后料柱透气性的变化。研究结果表明,由单种粒级烧结矿颗粒组成的料床空隙度较大,而大小颗粒混合后则会降低散料层空隙度。随着在25~40mm的焦炭中混入焦丁比例的提高,料柱透气性恶化,当混入比例达40%时,料层压差增大约3倍。小焦丁与烧结矿依次进行分装与混装时,烧结矿还原度分别为86.66%和90.93%,且后者的焦炭溶损反应更为明显。
In order to improve the utilization of coke and small sinter, the influence of coke mixing on the gas utilization in 3 200 m ~ 3 blast furnace of Tangshan Iron and Steel Co., Ltd. and the change of gas permeability of the material column after sizing and sinter subdivision were studied by theoretical analysis and experiment. The results show that the porosity of the material bed composed of single grain size sinter particles is larger, while the size of the particles mixed will reduce the porosity of the bulk layer. With the increase of the proportion of coke in 25 ~ 40mm coke, the air permeability of the column is deteriorated. When the mixing ratio is up to 40%, the material lamination pressure increases about 3 times. Small coke Ding and sinter in turn packing and mixing, the degree of reduction of sinter were 86.66% and 90.93%, respectively, and the latter coke dissolution reaction is more obvious.