Effect of MgO/Al2O3 and Burden Structure on Droplet Properties of Comprehensive Burden
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摘要: 通过高温熔滴炉模拟实际高炉冶炼条件,研究了MgO/Al2O3及炉料结构对综合炉料熔滴性能的影响。结果表明:MgO/Al2O3由0.9增加到1.0后,炉料软化和熔化温度均升高,炉料的最大压差和总特性值分别由3 057 Pa和202.84 kPa·℃降低到1 911 Pa和116.52 kPa·℃,熔滴性能得到改善;烧结矿配比由68%降低到60%后,炉料软化温度降低,熔化温度变化不大,最大压差和总特性值分别由1 911 Pa和116.52 kPa·℃降低到1 440.6 Pa和75.10 kPa·℃,熔滴性能得到改善。结合炉料熔滴过程中的压差变化及滴落物与未滴落物质量,得出结论:当烧结矿MgO/Al2O3=1.0,炉料结构为68%烧结矿+16%熔剂性球团矿+16%块矿时,综合炉料的熔滴性能最优。Abstract: Effect of MgO/Al2O3 and burden structure on droplet properties of comprehensive burden was studied by simulating actual blast furnace smelting conditions in high temperature drop furnace.The results show that when MgO/Al2O3 increases from 0.9 to 1.0,the softening and melting temperatures of furnace charge increase,the maximum pressure difference and total characteristic values of furnace charge decrease from 3 057 Pa and 202.84 kPa·℃ to 1 911 Pa and 116.52 kPa·℃,respectively,and the droplet properties are improved; when sinter ratio decreases from 68% to 60%,the softening temperature of furnace charge decreases,the melting temperature changes little,the maximum pressure difference and total characteristic values are respectively.From 1 911 Pa and 116.52 kPa·℃ to 1 440.6 Pa and 75.10 kPa·℃,the droplet performance was improved.Combining the pressure difference change and the droplets and non-droplets in the process of droplet melting,it is concluded that when sinter MgO/Al2O3=1.0 and burden structure is 68% sinter+16% flux pellet+16% lump ore,the droplet performance of the comprehensive burden is the best.
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Key words:
- sinter /
- MgO/Al2O3 /
- charge structure /
- droplet performance
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