摘要
考察焙烧温度及硫酸浓度对某云母型石煤中钒浸出率的影响。结果表明,钒主要以三价呈类质同象形式赋存于云母类矿物中,部分云母与粗粒石英紧密共生,是钒浸出率不高的根本原因。对原矿进行焙烧在破坏云母结构的同时使钒转为高价,溶液中二氧化硅的析出会造成部分钒损失。增加硫酸浓度,不仅可以有效提高钒的浸出率,而且可以避免溶液中钒的损失。
The effects of roasting temperature and sulfuric acid concentration on vanadium extraction from mica-type stone coal were investigated.The results indicate that vanadium exists with trivalence in micas mineral in the form of isomorphism.Low leaching rate of vanadium is caused by tightness symbiosis of part of mica and coarse quartz.Roasting of raw ores can break crystal structure of mica and turn vanadium to high valence state.Separation of silica from solution will cause some loss of vanadium.Increasing concentration of sulfuric acid can improve vanadium leaching rate and avoid loss of vanadium adsorbed by silica gel in lixivium.
出处
《有色金属（冶炼部分）》
CAS
北大核心
2015年第8期34-38,共5页
Nonferrous Metals（Extractive Metallurgy)
基金
"十二五"国家科技支撑计划项目(2015BAB03B05)
国家自然科学基金资助项目(51404177)
关键词
石煤
钒
石英
stone coal
vanadium
quartz
作者简介
蒋谋锋（1989-），男，湖北恩施人，硕士研究生；
通信作者：张一敏（1954-），男，河南许昌人，教授，博导．
