【摘要】 应用SOLGAS软件测算了氯化法钛自工艺中TiCl₄的氧化体系以及不同条件下热化学平衡产物的种类和组成。为验证该计算的结果,对氧化产物TiO₂粒子中元素铝的分布进行了测定,并据此讨论了氧化过程中AlCl₃的晶型转化作用以及AlCl₃加入量与氧化工艺条件的关系。更多还原

【Abstract】 The chloride route production is an important technology to produce futile-type TiO₂. In order to form futile-type TiO₂ during the oxidation process of TiCl₄, AlCl₃ is added into the TiCl₄ as a crystal conversion agent of TiO₂ before the oxidation reaction of TiCl₄. This paper calculates the thermochemical composition of TiCl₄ oxidation system using a SOLGAS program under different conditions. It has been found that some Al₂O₃·TiO₂ is formed under a specified condition. To confirm the calculated results, the profile of element Al in a TiO₂ particle produced in a domestic chloride plant is measured. Differing from TiO₂ of Du Pont R902, the element Al has not been detected in the centre area of the TiO₂ particle made in the domestic chloride plant. Based on the calculation and the profile of element A1 in TiO₂ particles, the mechanism of AlCl₃ promoting TiO₂ crystal conversion and the quantity of AlCl₃ in TiCl₄ at certain conditions are discussed.更多还原