Study on the Organics Pretreatment of Crude Titanium Tetrachloride with High Content of Vanadium for Vanadium Removal

The crude titanium tetrachloride obtained from the titanium recovering process of Pangang blast furnace slag has a high vanadium content （4.9‰）,which cannot be effectively removed by the existing process with aluminum powder. To solve this problem,this paper proposes a pretreatment method by organics for vanadium removal before the following process of vanadium elimination by aluminum powder,and the main technological parameters influencing vanadium removal efficiency,e.g. the species and dosage of organics,temperature and time,were optimized. The results show that the vanadium content of crude titanium tetrachloride can be decreased to 1.667‰ after the pretreatment at 45 ℃ for 30 min with 3% mineral oil. The slurry produced in pre-processing has a good settling property,and the titanium tetrachloride after separation of the slurry meets the feedstock requirements of vanadium removal process by aluminum powder. Moreover,the slag obtained by drying the slurry of vanadium removal has a high recovery value since it contains a high concentration of vanadium（8.06%）.