摘要
提出了伴生明矾石矿尾矿中温焙烧低浓度酸浸处理工艺,尾矿经700℃焙烧3h后,在液固比为6mL/g,10%硫酸中90℃水溶搅拌3h,Al和K浸取率分别达83%和93%.通过自然结晶和蒸发结晶分别得到了明矾和水合硫酸铝晶体,出钒率超过20%,以氧化物记的明矾及水合硫酸铝的回收率均达到65%左右,初步实现了铝、钾产品的分离,在保持较高Al,K浸取率的前提下降低了能耗、酸耗.
A medium temperature calcination-low concentration acid leaching process was introduced to treat the associated alunite ore tailings. After calcination of the tailings at 700℃ for 3 h, and following leaching at 90℃ for 3 h in 10% sulfuric acid system with the acid/ore ratio of 6 mL/g, the leaching rates of Al and K reached 83% and 93%, respectively. Alum and aluminum sulfate hydrate crystals were obtained through natural and evaporation crystallization. The recovery rate of alum and aluminum sulfate hydrate crystals was up to 65%. This work provides a method to separate aluminum and potassium products preliminarily under the premise of reduction of energy and acid consumption.
出处
《过程工程学报》
CAS
CSCD
北大核心
2013年第2期224-229,共6页
The Chinese Journal of Process Engineering
基金
低品位难处理黄金资源综合利用重点实验室开放基金资助项目(编号:ZJKY2011(B)KFJJ002)
国家杰出青年科学基金资助项目(编号:51125018)
国家自然科学基金重大项目资助(编号:51090380)
关键词
明矾矿
焙烧
酸浸
结晶
Al
K
alunite
calcination
acid leaching
crystallization
Al
K
