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TiO2/SiO2对含钒钛高炉炉料的软化温度、熔化温度、最大压差等高温物理性能的影响。试验结果表明:TiO2/SiO2比值由0.17增大到0.45后,炉料的软化开始温度(T10)升高了56℃,软化终了温度(T40)升高了35℃,说明软熔带位置较低;炉料的熔化开始温度(Ts)升高了40℃,滴落温度(Td)升高了30℃;炉料的最大压差(ΔPmax)升高,炉料透气性变差;炉料熔滴的总特性值(S值)增大,熔滴性能变差。试验范围内随着TiO2/SiO2比值的增大炉料的熔滴性能变差,建议在承钢现有炉料结构条件下,应适当降低TiO2/SiO2比值。
Abstract:
Experiments were carried out in the lab to simulate dropping zone of blast furnace in a high temperature oven,the effect of different TiO2/SiO2 on charge softening temperature range,melting temperature range,maximum pressure and other high temperature physical properties had been respectively discussed. The results showed that with the increase of TiO2/SiO2 from 0.17 to 0.45 starting softening temperature of furnace charge was increased by 56 ℃,and the end softening temperature was increased by 35 ℃,which indicated the lower position of the cohesive zone; at the same time the renewed pressure temperature was increased by 40 ℃,and dropping temperature was increased by 30 ℃; the maximum pressure (ΔPmax) increased,which led to worse burden permeability; the total characteristic droplet value was increased,which resulted in low droplet performance. It can be concluded that with the increase of TiO2/SiO2 droplet performance got worse. Therefore,TiO2/SiO2 should be appropriately reduced under the existing burden structural conditions of Cheng steel.
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