摘要
针对我国石煤沸腾炉渣钒、硅含量很高的特点,提出一种新的工艺进行硅与钒的分步高效提取。取一定量碳酸钠混匀于石煤烧渣中,经1 400℃高温熔融后进行水淬;得到的水淬渣在100℃用NaOH溶液进行浸出,可制得水玻璃溶液,原料中硅的浸出率达80.5%;产生的碱浸渣用10%硫酸在60℃下进行酸浸,加入一定量氧化剂后,钒的浸出率可达93.1%。该工艺在高效提取钒的同时,实现了石煤烧渣中硅的综合利用,可减少约70%的尾渣排放量。
A new efficient step-by-step process of extracting vanadium and silicium from stone coal cinder was pro- posed, which overcomes the tendency of stone coal slag to contain vanadium and high silicium during the power gener- ation process in China. The results show that when the stone coal cinder blending with the fight amount of sodium car- bonate is melted at 1 400℃ for two hours and then is poured into water, then the resulting cinder is leached in sodium hydroxide solution at 100℃ ,water glass solution can be produced,and the leaching rate of silicium in raw material is 80.5%. At the same time,the obtained alkaline leaching residue is leached in 10% sulfuric acid solution at 60℃, adding small amount of oxidant, the leaching rate of vanadium is 93.1%. As well as effectively extracting vanadium, this process could realize the comprehensive utilization of silicium in stone coal, and reduce tailing by 70%.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2013年第1期150-155,共6页
Journal of China Coal Society
基金
国家自然科学基金资助项目(50974133)
关键词
石煤烧渣
熔融
水淬渣
浸硅
浸钒
stone coal cinder
melting
water quenching slag
leaching silicium
leaching vanadium
