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首页> 外文会议>32nd Annual Hydrometallurgy Meeting and International Conference on the Practice and Theory of Chloride/Metal Interaction, Vol.2, Oct 19-23, 2002, Montreal, Quebec, Canada >Upgrading of Titania Slags by Selective Chlorination in Molten Salts
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Upgrading of Titania Slags by Selective Chlorination in Molten Salts

机译：熔融盐中选择性氯化法提纯二氧化钛渣

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摘要

The principal use of titanium minerals is for the manufacture of titanium dioxide, which is a major pigment employed in the paint, plastic and rubber industries. These pigments are manufactured either by the sulphate or chloride processes. For both processes, the use of high grade, low impurity containing materials has become standard practice in recent years, due to technical and environmental reasons. In this way, titania slag is today one of the preferred feedstocks by the TiO_2 pigment manufacturers. Slags made by the electro-smelting of hard rock ilmenites, however, can not be employed in the chloride process because of their high contents of liquid chloride forming elements, especially calcium and magnesium. In this paper an alternative process for the upgrading of titania slags is presented. The process consists in selective chlorination of the slag in a molten salt bath, followed by separation of the chlorinated slag from the fused medium and leaching of the upgraded product in water. As a result, the impurities contained in the slag are converted into chlorides that either volatilise or dissolve in the molten salt.
机译：钛矿物的主要用途是用于生产二氧化钛，二氧化钛是用于油漆，塑料和橡胶行业的主要颜料。这些颜料是通过硫酸盐或氯化物工艺制造的。对于这两种方法，由于技术和环境原因，近年来使用高品位，低杂质含量的材料已成为标准做法。这样，二氧化钛渣是当今TiO_2颜料生产商的首选原料之一。然而，由于硬岩钛铁矿的电冶炼产生的炉渣不能用于氯化物工艺，因为它们含有大量的液态氯化物形成元素，尤其是钙和镁。本文提出了另一种提纯二氧化钛渣的方法。该方法包括在熔融盐浴中对炉渣进行选择性氯化，然后从熔融介质中分离出氯化炉渣，并在水中浸出提质产品。结果，炉渣中包含的杂质被转化为氯化物，该氯化物挥发或溶解在熔融盐中。

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