论文部分内容阅读
研究了一种“焙烧-逆流浸出-酸化-二次浸出”新工艺来处理含1.13%BeO的低品位浮选铍精矿。铍精矿于1 050℃下焙烧120min,焙砂磨细至粒度小于0.1mm后,在30℃下按液固比(返回的二次浸出液与焙砂的质量比)4∶1进行逆流浸出60min;然后按酸矿比1∶1在逆流浸出渣中添加浓硫酸混匀,于100℃酸化30min;酸化渣按4∶1的液固比加水后于30℃进行二次浸出60min,浸出渣中BeO含量可降至0.14%,铍浸出率达88.88%,可用于后续提取氧化铍。
A new “roasting - countercurrent leaching - acidizing - secondary leaching” process was developed to treat low grade flotation beryllium concentrate containing 1.13% BeO. Beryllium concentrate was roasted at 1 050 ℃ for 120 min. After calcination to a particle size of less than 0.1 mm, a countercurrent leaching was carried out at 30 ° C for a liquid-to-solid ratio (mass ratio of secondary leachate returned to calcine) 4: 1 ; Then acid-to-mineral ratio 1: 1 in the countercurrent leaching residue was added concentrated sulfuric acid, acidified at 100 ℃ 30min; acid residue by 4: 1 ratio of liquid to solid after the second leaching at 30 ℃ 60min leaching residue BeO content can be reduced to 0.14%, beryllium leaching rate of 88.88%, can be used for subsequent extraction of beryllium oxide.