除钒油的选型对海绵钛中氧碳含量的影响研究

Study on the influence of selection of vanadium-removing oil on oxygen and carbon content in titanium sponge

植物油和矿物油作为TiCl_(4)除钒效果较好的有机物,在钛白粉和海绵钛行业应用广泛。本文通过大量的实验研究发现,7#、8#、9#矿物油和进口植物油在加入量低于0.07%时,可把VOCl_(3)除去,且植物油的除钒效果更快更好。但应用到生产中时,由于植物油主要成分为不饱和脂肪酸,含有氧元素,因此生产的海绵钛氧含量偏高。但钛白粉行业对氧无要求,因此得出结论,在钛白粉行业,没有氧含量的要求,使用植物油除钒速率更快。而在海绵钛行业,氧碳作为杂质元素,对除钒油的要求更严格,因此在粗TiCl_(4)除钒环节,选用除钒油加入量不超过0.07%,碳数分布最高为C30、闪点为200℃左右的7#矿物油除钒效果更佳。

Vegetable oil and mineral oil,as organic compounds with good vanadium removal effect of TiCl_(4),are widely used in titanium dioxide and titanium sponge industry.In this paper,through a large number of experimental studies,7#,8#,9#mineral oil and imported vegetable oil can remove VOCl_(3)when the addition amount is lower than 0.07%.Moreover,the vanadium removal effect of vegetable oil is faster and better.However when applied to production,because the main component of vegetable oil is unsaturated fatty acid which contains oxygen element,the oxygen content of titanium sponge produced is high,but titanium dioxide industry has no requirement for oxygen,so it is concluded that the effect of using vegetable oil is better in titanium dioxide industry,since it has no requirement for oxygen.However,in the titanium sponge industry,oxygen and carbon as impurity elements,the requirements for vanadium removal oil are stricter.Therefore,in the vanadium removal process of crude TiCl_(4),7#mineral oil has better vanadium removal effect,with no more than 0.07%vanadium removal oil,the highest carbon distribution of C30 and the flash point at about 200℃.