某低品位黑钨细泥浮-重-浮联合流程分选试验研究

Combined floatation-gravity-floatation flowsheet of a low grade wolframite slime

对某低品位黑钨细泥,采用"预先脱硫浮选-离心机重选富集-黑钨细泥粗精矿再浮选"的工艺流程进行了选矿试验研究.试验结果表明,经二次浮选脱硫、一粗一扫离心机重选预富集、一粗三精二扫黑钨细泥粗精矿再精选的浮-重-浮联合工艺流程处理该黑钨细泥,最终可获得含WO3品位为38.01%、回收率为64.27%的钨精矿,较好地回收了该黑钨细泥中的钨矿物.该工艺由于采取了预先脱硫和离心选矿机的粗选富集措施,使整个浮选工艺药剂总用量大幅下降,更有益于节约选矿成本和环境保护.

This paper studies the flowsheet of ＂pre-desulfurization floatation-centrifuge preenrichment gravity separation-wolframite slime floatation＂ based on the features of a low grade wolframite slime. The test results show that after the application of the flowsheet of twice roughing sulfur removal, roughing-cleaning centrifuge preenrichment by gravity separation, then roughing three times and cleaning twice scavenging separating wolframite by flotation, the tungsten concentrate with the grade of 33.80 % and the recovery of 61.08 % could be obtained. The tungsten minerals are well recoverd from wolframite slime with the recovery rate of 64.27 %. The flowsheet is cost-effective and environment-friendly for reduced beneficiation reagents dosages by adopting roughing enrichment measures of pre-desulfurization and centrifugal separator .