摘要:
利用高温熔滴炉模拟实际高炉软熔带的运行情况,探讨承钢炉料结构条件下,不同碱度对含钒钛高炉炉料软化温度、熔化温度、最大压差、熔滴综合指标等高温物理性能的影响。试验结果表明:碱度在1.38~1.68变化时,随着碱度的升高炉料软化开始温度(T10)升高,由1 180℃升高到1 197℃;软化区间(ΔT1)变窄,由197℃下降到124℃。熔化开始温度(Ts)升高,由1 240℃升高到1 263℃;熔化区间(ΔTds)变窄,由175℃下降到134℃。最大压差(ΔPmax)降低,由14.70 k Pa降低到8.71 k Pa,料层透气性得到改善。熔滴综合指标(S值)降低,由1 301 k Pa·℃降低到638 k Pa·℃,炉料熔滴性能变好。当碱度超过1.68后炉料部分熔滴性能指标变差,因此碱度1.68是承钢现有炉料结构条件下最适宜的碱度。
关键词:
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高炉 /
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钒钛炉料 /
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熔滴性能 /
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碱度
Abstract:
Experiments were carried out in the lab to simulate dropping zone of blast furnace in a high temperature oven,and the effect on charge softening temperature range,melting temperature range,maximum pressure,droplet comprehensive index and other high temperature physical properties at different basicity had been discussed. The results showed when the basicity had been increased within the range of 1.38~1.68,softening temperature were increased from 1 180 ℃ to 1 197 ℃,cohesive zone were narrowed down from 197 ℃ to 124 ℃,melting temperature were increased from 1 240 ℃ to 1263℃,dropping zone were narrowed down from 175 ℃ to 134 ℃,the maximum pressure (ΔPmax) were decreased from 14.70 k Pa to 8.71 k Pa which improved the blast furnace permeability,and the droplet comprehensive performance (S value) were decreased from 1 301 k Pa·℃ to 638 k Pa·℃,thusburden droplet became better. But part of indexes went downward after basicity exceeding 1.68,therefore basicity at 1.68 is the most reasonable for existing burden.
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