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利用高温熔滴炉模拟实际高炉软熔带的运行情况,探讨TiO_2/SiO_2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:TiO_2/SiO_2比值由0.17增大到0.45后,炉料的软化开始温度(T_(10))升高了56℃,软化终了温度(T_(40))升高了35℃,说明软熔带位置较低;炉料的熔化开始温度(T_s)升高了40℃,滴落温度(T_d)升高了30℃;炉料的最大压差(ΔP_(max))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TiO_2/SiO_2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TiO_2/SiO_2比值。
The effect of TiO_2 / SiO_2 on high temperature physical properties such as softening temperature, melting temperature and maximum pressure difference of the vanadium-bearing blast furnace slag was investigated by simulating the operation of the actual blast furnace refractories with a high-temperature drop-casting furnace. The results show that when the ratio of TiO_2 / SiO_2 increases from 0.17 to 0.45, the softening temperature (T_ (10)) increases by 56 ℃ and the final softening temperature (T_ (40)) increases by 35 ℃ The melting zone temperature was lower by 40 ℃ and the dropping temperature (T_d) was increased by 30 ℃. The maximum pressure drop (ΔP max) of the charge increased and the gas permeability of the charge changed Poor; the drop of the charge of the total property value (S value) increases, the droplet performance deterioration. With the increase of TiO 2 / SiO 2 ratio, the droplet properties of the charge become worse within the test range. It is suggested that the ratio of TiO 2 / SiO 2 should be properly reduced under the existing charge structure of Cheng Steel.