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在向 TiCl_4中加入一定的 AlCl_3以后,氯化法钛白工艺中的氧化过程就变成了由 Ti-Al-O-Cl 四元系的热化学过程.应用 SOLGASMIX 和 H-S-C 计算化学软件对该四元系不同工艺条件下热化学平衡组分的计算结果表明,该四元系中,元素 Ti、Al 的氧化特性与体系的条件有着非常紧密的关系,即当体系的温度、TiCl_4中 AlCl_3的数量、以及配氧系数变化时,Ti 和 Al 的氧化特性同时也要发生相应的变化,特别是 AlCl_3的氧化特性,出于当温度升高时,AlCl_3的氧化存在一个陡降区,所以,为了使加入的 AlCl_3能在氧化过程中起到转化剂的作用,氯化法钛白中氧化工艺参数的选择,必须避开此陡降区.
After adding a certain amount of AlCl 3 into TiCl 4, the oxidation process in the chlorination titanium dioxide process becomes the thermochemical process of the Ti-Al-O-Cl quaternary system.Using SOLGASMIX and HSC computational chemistry software, The calculation results of the thermochemical equilibrium components under different process conditions show that the oxidation characteristics of Ti and Al in this quaternary system are closely related to the system conditions. That is, when the temperature of the system, the amount of AlCl 3 in TiCl 4 , As well as the oxidation coefficient changes, the oxidation characteristics of Ti and Al should also change accordingly, especially the oxidation characteristics of AlCl_3, because when the temperature rises, AlCl_3 oxidation there is a steep drop zone, so in order to make Addition of AlCl3 can play a role in the process of oxidation of the conversion agent, the chlorination of titanium dioxide oxidation process parameters, you must avoid this steep drop zone.