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通过热力学计算,讨论了影响高熔点Ti(C,N)在炉内沉积的因素以及可能导致钛矿护炉效果不佳的原因。结果表明,铁水中的硅含量限制了铁水中的钛含量(w([Ti])≤0.2 w([Si])),所以控制适合的冶炼温度促进渣中TiO2还原的同时还要提高铁水中的硅含量,以保证铁水中有足够的钛;另一方面,要通过降低侵蚀炭砖表面温度来降低钛的溶解度,促进侵蚀部位铁水中钛的析出。通过钛平衡计算得知,护炉时需要长期加入含钛炉料,使得含钛保护层脱落后能在短时间内迅速形成。
Through the thermodynamic calculation, the factors affecting the deposition of high melting point Ti (C, N) in the furnace and the possible reasons for the poor titanium recovery are discussed. The results show that the content of silicon in molten iron limits the content of titanium in molten iron (w ([Ti]) ≤0.2 w ([Si])). Therefore, controlling the suitable smelting temperature can promote the reduction of TiO2 in slag, Of the silicon content in order to ensure that there is enough titanium in the molten iron; on the other hand, the titanium solubility in the molten iron should be reduced by reducing the surface temperature of the carbon brick and the precipitation of titanium in the molten iron in the erosion site should be promoted. Calculated by the balance of titanium that protect the furnace long-term need to join the titanium-containing charge, making the titanium-containing protective layer off quickly formed in a short time.