攀钢高炉不同炉料相互作用机理试验研究

Research on the interaction mechanism between different burden for blast furnace of Pangang

为探究攀钢高炉不同炉料在软熔过程中的相互作用机理,进行了单种原料及其混合矿软熔性能的测定以及由两种炉料组成的混合矿在特定温度软熔性能测定的中断试验。在试验条件下,块矿的滴落温度T_(d)最低。与球团矿相比,烧结矿的软化终了温度T_(40)低、滴落温度T_(d)高、软化温度区间ΔT_(s)窄、熔化温度区间ΔT_(m)宽。与烧结矿和球团矿相比,混合矿的滴落温度T_(d)明显降低。块矿软熔以后在荷重的作用下渗入烧结矿和球团矿的空隙间,促进其与烧结矿或球团矿中物相的相互侵蚀和元素在不同物相间的迁移,从而加速混合矿的软化熔融。

In order to explore the interaction mechanism between different burdens in the softeningmelting process of the blast furnace in Pangang, the softening-melting properties of different single burdens and their mixed burden were tested. Meanwhile, the interrupt experiment of softening-melting properties of the mixed burden by any two kinds of single burdens at a specific temperature was carried out. Under the experimental conditions, the dropping temperature T_(d)of lump ore is the lowest. Compared with the pellet, the sinter has a lower final softening temperature T_(40), a higher dropping temperature T_(d), a narrower softening temperature range ΔT_(s), and a more comprehensive melting temperature range. Compared with the sinter and pellet, the dropping temperature T_(d)of mixed burden decreases.During softening and melting, the lump ore infiltrates into sinter or pellet under the action of load, conducive to the mutual erosion between lump ore and phases of the sinter or pellet as well as the migration of elements between different phases, thus promoting the softening and melting of mixed burden.