【摘要】 利用Factsage热力学软件及数据库，计算分析了引入氧气对碳化钛渣中TiC和钙镁氧化物氯化的影响，以及加氧选择性强化碳化渣中TiC氯化反应的同时减少或抑制钙镁氧化物氯化反应的调控方案。结果表明，加氧低温氯化可促进渣中TiC的氯化反应进程，提高TiC的氯化率；当低温氯化反应温度为500℃时，在Cl₂/TiC摩尔比为1.80～3.50范围内，MgO不发生氯化反应，氧气的引入可以使CaO氯化反应受到抑制，降低CaO氯化率；氯氧气体摩尔比为4.00:1.00，氯化反应使碳化渣中TiC质量分数减小至4.02%时，可将氯化气体切换为氯气与氮气的混合气体，进一步氯化渣中残留的TiC直至2.50%以下；此加氧分步氯化与不加氧直接氯化相比，氯气总消耗量可减少25.69%,CaO总氯化率可减少37.74%。更多还原

【Abstract】 Based on the Factsage thermodynamic software and database, the effects of introducing oxygen on the TiC and calcium magnesium oxide chlorination in titanium carbide slag are analyzed, and the regulatory scheme of adding oxygen to selectively enhance the chlorination reaction of TiC in the slag while reducing or inhibiting the chlorination reaction of calcium and magnesium oxides are studied. The results show that the oxygenated low-temperature chlorination can promote the chlorination process and increase the chlorination rate of TiC in the slag. When the low-temperature chlorination reaction temperature is 500 ℃ and the molar ratio of Cl₂/TiC is 1.80～3.50, MgO does not chlorinate, and the introduction of oxygen can inhibit the CaO chlorination reaction and reduce the CaO chlorination rate. When the molar ratio of chlorine-oxygen gas is 4.00:1.00, and the mass fraction of TiC with chlorination reaction in carbonization slag is reduced to 4.02%, the chlorinated gas can be switched to a mixture of chlorine gas and nitrogen gas to further chlorinate the residual TiC in the slag to less than 2.50%. Compared with direct chlorination without adding oxygen, the total chlorine consumption can be reduced by25.69% and the total chlorination rate of CaO can be reduced by 37.74%.更多还原