知识与财富的链接
针对目前采用"焙烧—碱浸提钒"工艺从石煤钒矿中提取钒存在碱消耗大、浸出时间长和浸出液杂质含量高等问题,研究采用高压碱浸法浸出石煤钒矿焙砂。试验考察碱用量、液固比、浸出时间、循环浸出等因素对钒浸出率的影响。结果表明,在NaOH用量为矿重的3.5%,液固比为1.5∶1,180℃下,2 h浸出,钒的浸出率达到86%,浸出液中钒硅质量浓度比为0.65,浸出液pH值约为12.1。高压碱性浸出具有钒浸出率高,杂质浸出率低等优点,为石煤提钒提供了一个新的途径。
Considering that extracting V2O5 from coal-stone by roasting-alkali leaching process exist some serious problems such as abundant alkali consumption,long leaching time and leaching solution with high impurity content and so on,the experiment of extracting V2O5 from stone coal calcine by pressure alkaline leaching was investigated,and effects of dosage of sodium hydroxide,liquid-solid ratio,leaching time,recycle leaching on the vanadium leaching were studied.The results showed that when sodium hydroxide 3.5...
