钨钼冶炼过程中除钒

V removal in tungsten or molybdenum smelting process

针对钨钼冶炼过程中钒难以深度除去的难题，借鉴海洋化学研究中的元素迁移规律，研究采用高价水合氧化物从钨钼冶炼过程中除钒。结果表明：从钨酸钠溶液中除钒，当铁盐添加量按Fe与v摩尔比为40、溶液pH值为8．5～9．0时，除钒率均能达到99％以上。而在相同条件下，当采用水合铝氧化物和锰氧化物作为除钒剂时，除钒率分别只能达到90％和60％，除钒效果明显不及采用铁盐时的。另外，用于在钼酸钠溶液除钒，当铁盐添加量按Fe与V摩尔比为40、溶液pH值7．5～10．8时，除钒率可达到97％，铝损失率小于5％。而在钼酸铵溶液中，当铁盐添加量按Fe与V摩尔比为10、溶液pH为8．6～9．0时，除钒率在96％以上，同时几乎没有钼损失；当铁盐添加量按Fe与V摩尔比增加到20时，除钒率均高于97％，钼损失率也小于2％。在钨钼冶炼过程中，铁盐可以作为一种有效的除钒试剂。

In view of the problem for vanadium removal efficiently in the tungsten or molybdenum smelting process, the V removal by adopting the high valence hydrated oxide was reached by the transferring regularity of elements in the thalassochemistry. The effect of different reagents on the V removal from tungstate solution was firstly investigated. The results show that when different ferric salts are used to remove V, the V removal rate can reach 99% under the conditions of n（Fe）/n（V）=40 and pH 8.5-9.0. Under the same conditions, when the hydrous aluminous oxide and hydrous manganic oxide are used to remove V, the V removal rate only reaches 90% and 60%, respectively. Compared with using ferric salts, hydrous ferric oxide has better vanadium-removal effect. The effect of ferric salt on the V removal from molybdate solution was also investigated. The results show that, as the addition amount of ferric salt （molar ratio of Fe to V） is 40, 97% of V can be removed from sodium molybdate under the conditions ofpH 7.5-10.8 and reaction time 60 min, and the Mo loss rate is below 5%. In the ammonium molybdate, the V removal rate can reach 96% under the conditions of n（Fe）/n（V）=lO, pH 8.6-9.0 and reaction time 60min, and there is almost no loss of Mo. As the addition of ferric （n（Fe）/n（V）） increases to 20, the V removal rate exceeds 97% and the Mo loss rate is below 2%. The ferric salt is effective reagent for removing V in the process of tungsten and molybdenum smelting.