中文摘要：

对从石煤碱法提钒过程产生的高硅钒浸出液中回收硅和钒资源及浸出剂的再生进行研究。首先通入CO2气体调节浸出液pH至8．5，使浸出过程中所积累的大量硅杂质以水合二氧化硅沉淀的形式脱除，并经进一步处理后制备成白炭黑副产品：然后，采用溶剂萃取的方法从净化后的浸出液中回收钒；提钒后留下的余液再通过苛化反应实现浸出剂的再生。研究结果表明：浸出液按上述工艺进行净化一提钒一苛化处理后，脱硅率达到99．43％，钒回收率大于95．00％；制备的无定形白炭黑产品SiO2纯度大于98％，比表面积高达450m2／g；再生浸出液返回浸矿时，钒的浸出率为81．7％。对于整个工艺，每生产1tV2O5可以获得白炭黑副产品10t，并可实现总量75％浸出剂的再生。

英文摘要：

A novel procedure of extracting vanadium and silicon from stone coal alkali leaching liquor was investigated. The procedures mainly consisted of three steps. Firstly, the silicon impurities were precipitated in the form of hydrated silica from the leaching liquor through introducing CO2 gas to maintain its pH 8.5. From the precipitates, carbon-white was made through further processes. Then, vanadium was extracted from the leaching liquor after precipitation by solvent extraction. Lastly, the lixiviant was recycled from the leaching liquor after two steps above through causticizing reaction. The results show that through the procedures of purification-extraction of vanadium-causticization, the desilication rate and recovery of vanadium of the leaching liquor reach 99.43% and 95.00%, respectively.And the purity and specific surface area of the amorphous carbon-white produced are up to 98% and 450 m2/g, respectively. The leaching rate of the recycled lixiviant solution is 81.7%. It is estimated that through this procedure 10 t of carbon-white are produced and 75% of lixiviant is recycled in the production of 1 t V2O5.