As a distinctive unshaped refractory material used in steelmaking induction furnace linings,significant variations in raw material performance,particularly erosion resistance,have been observed across silica sources f...As a distinctive unshaped refractory material used in steelmaking induction furnace linings,significant variations in raw material performance,particularly erosion resistance,have been observed across silica sources from different regions.To clarify the causes of performance discrepancies and reveal the erosion resistance mechanisms,erosion resistance experiments were conducted on three quartzite raw materials from distinct regions.Furthermore,the enhancement effects of mineralizers on the raw material with the poorest performance were investigated,and the erosion resistance mechanisms of representative raw materials and mineralization effects in silica ramming materials were proposed.The results demonstrated that the presence of dolomite and iron oxide in raw materials is critical for improving the erosion resistance of silica ramming materials.However,the material with 1 wt.%dolomite as a standalone mineralizer exhibited optimal erosion resistance compared to iron oxide composite mineralizers.This improvement is attributed to the formation of uniformly distributed tridymite and an appropriate liquid phase,which mitigates volume expansion effects caused by quartz phase transformation,thereby minimizing aggregate cracking.Additionally,magnesium derived from dolomite plays a specialized role in the operational environment,with the synergistic effects of these two factors collectively enhancing the material’s erosion resistance.展开更多
基金the National Natural Science Foundation of China(U24A20101).
文摘As a distinctive unshaped refractory material used in steelmaking induction furnace linings,significant variations in raw material performance,particularly erosion resistance,have been observed across silica sources from different regions.To clarify the causes of performance discrepancies and reveal the erosion resistance mechanisms,erosion resistance experiments were conducted on three quartzite raw materials from distinct regions.Furthermore,the enhancement effects of mineralizers on the raw material with the poorest performance were investigated,and the erosion resistance mechanisms of representative raw materials and mineralization effects in silica ramming materials were proposed.The results demonstrated that the presence of dolomite and iron oxide in raw materials is critical for improving the erosion resistance of silica ramming materials.However,the material with 1 wt.%dolomite as a standalone mineralizer exhibited optimal erosion resistance compared to iron oxide composite mineralizers.This improvement is attributed to the formation of uniformly distributed tridymite and an appropriate liquid phase,which mitigates volume expansion effects caused by quartz phase transformation,thereby minimizing aggregate cracking.Additionally,magnesium derived from dolomite plays a specialized role in the operational environment,with the synergistic effects of these two factors collectively enhancing the material’s erosion resistance.
