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首页> 外文会议>T. T. Chen honorary symposium on hydrometallurgy, electrometallurgy and materials characterization >A NEW METHOD FOR PRODUCTION OF TITANIUM DIOXIDE PIGMENT - ELIMINATING DIRECT CO_2 EMISSIONS
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A NEW METHOD FOR PRODUCTION OF TITANIUM DIOXIDE PIGMENT - ELIMINATING DIRECT CO_2 EMISSIONS

机译：生产二氧化钛颜料的新方法-消除直接的CO_2排放

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Titanium dioxide (TiO_2) has been widely used as pigment in paints, paper and cosmetic products, as well as high-tech applications such as PV Cells, semiconductors, biomedical devices and air purification. TiO_2 pigment is primarily produced by the high temperature chloride process, resulting in considerable CO_2 emissions. A novel hydrometallurgical process for making TiO_2 pigment without direct CO_2 emission is investigated. The new method promises to eliminate direct CO_2 emissions, consume significantly less energy, and produce minimal environmental waste. The novel process involves molten salt roasting of titania slag, with subsequent washing, leaching, solution purification, hydrolysis, calcination and post-treatment stages, resulting in high-purity anatase or rutiie pigments while realizing significantly reduced environmental impacts. Pigment whiteness is critically sensitive to trace amounts of discoloring impurities such as iron and chromium. Several methods for reducing the levels of these impurities are investigated. Energy consumption and emission models are also developed.
机译：二氧化钛（TiO_2）已被广泛用作油漆，纸张和化妆品中的颜料，以及诸如光伏电池，半导体，生物医学设备和空气净化等高科技应用。 TiO_2颜料主要通过高温氯化物工艺生产，导致大量的CO_2排放。研究了一种新型的湿法冶金法，该工艺制备了不直接排放CO_2的TiO_2颜料。新方法有望消除直接的CO_2排放，消耗的能源大大减少，并减少对环境的浪费。新工艺涉及二氧化钛炉渣的熔融盐焙烧，以及随后的洗涤，浸出，溶液纯化，水解，煅烧和后处理阶段，从而产生高纯度的锐钛矿或红宝石颜料，同时显着降低了对环境的影响。颜料白度对痕量的褪色杂质（例如铁和铬）极为敏感。研究了减少这些杂质含量的几种方法。还开发了能耗和排放模型。

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