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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.
The leaching process of alum ore tailings with moderate temperature calcination was proposed. After the tailings were calcined at 700 ℃ for 3h, the leaching solution was stirred at 90 ℃ for 10h and the liquid-solid ratio was 6mL / g. Al and K leaching The rates were 83% and 93%, respectively.The alum and hydrated aluminum sulfate crystals were obtained by natural and evaporative crystallization, respectively, the vanadium output was over 20%, and the recoveries of alum and hydrated aluminum sulfate accounted for about 65% , Initially achieved the separation of aluminum and potassium products, while maintaining high Al, K leaching rate under the premise of reducing energy consumption, acid consumption.