这是一篇矿物加工工程领域的论文.以新疆某次火山岩型铍矿石为研究对象,进行矿物组成、元素组成分析,查明有用矿物的嵌布粒度及赋存状态,并进行系统的浮选实验.在磨矿过程加入活化剂氟化钠,对磨矿细度、浮选药剂制度进行了优化,当磨矿细度为-0.074 mm 85%、pH值调整剂碳酸钠、抑制剂硅酸钠、捕收剂油酸钠用量分别为 1500、1000、2000 g/t时,可以获得粗选精矿BeO品位 6.03%、回收率 97.02%的粗选指标.将粗选精矿再磨至-0.045 mm 90%,通过两次精选实验,精矿BeO品位达到 8.40%,精矿BeO回收率为 78.09%,粗选尾矿经过一次扫选实验,尾矿BeO含量可降至 0.003%."一粗一扫三精、中矿集中返回粗选"的浮选闭路实验,获得了精矿BeO品位 8.12%、回收率 80.99%的浮选指标,可以实现羟硅铍石的较好富集,满足我国当今铍冶炼工艺对原料BeO含量的要求.
Beneficiation of Bertrandite Ores in Xinjiang
This is an article in the field of mineral processing engineering.The volcanic bertrandite ore used in this study was obtained from Xinjiang,China.Mineral and multi-elemental compositions were characterized to identify the disseminated grain size and occurrence of valuable minerals,and systematic flotation tests were carried out.In the presence of activator sodium fluoride in the grinding process,grinding fineness and reagents dosages were optimized.It was shown that with grinding fineness of-0.074 mm 85%,dosages of pH regulator sodium carbonate,inhibitor sodium silicate,and collector sodium oleate of 1500 g/t,1000 g/t,and 2000 g/t respectively,a coarse concentrate was generated with BeO grade of 6.03%and recovery of 97.02%.This coarse concentrate was reground to-0.045 mm 90%and enriched by two cleaning stages yielding a clean concentrate assaying 8.40%BeO with a BeO recovery of 78.09%,while BeO content of the coarse tailing was degraded to 0.003%after one scavenger flotation.The closed-circuit flotation test of"one-coarse,one-scavenger,three-cleaning separation,and integrated middling recirculated to coarse separation"has generated a concentrate with BeO grade of 8.12%and recovery of 80.99%,meeting the requirements of beryllium process for BeO content in raw materials.
Mineral processing engineeringBertranditeFlotation reagentsGradeBeneficiationGrinding fineness
万方数据
维普
