低品位硅质石煤钒矿的选矿试验研究

针对陕西某地低品位石煤钒矿,在工艺矿物学研究的基础上,采用沉降—磁选的工艺技术方案,对沉降和磁选过程进行了工艺技术条件的研究。结果表明:在磨矿细度为-74μm占35.78%,分散剂YZA用量为2.0 kg/t,沉降浓度为35%,沉降时间为5 min的条件下,沉降效果最佳;在一段沉降脱泥的基础上进行二段脱泥流程,可以提高钒的回收率;在磁场强度为1.4 T时,磁选效果最优。通过沉降—磁选联合选别流程,可抛掉V_2O_5品位为0.15%、回收率为16.57%的尾矿,最终获得V_2O_5品位为2.10%、回收率为83.43%的钒精矿。

Mineral Processing Research about Low-grade Siliceous Vanadium-bearing Stone Coal Ore

In this paper, a sedimentation-magnetic separation technique was proposed to deal with a vanadium-bearing stone coal ore in Shanxi on the basis of mineralogical analysis, then the technology conditions of sedimentation and magnetic process were studied.The?results?show?that?when?P35.78%?is?0.074mm, the?usage?of?dispersant?YZA?is?2000g/t, the?concentration?of?solution?is?35%,?sedimentation?time?is?5min,?the? result ?of sedimentation is?optimum.?Meanwhile,?processing?secondary?desliming?after?primary?desliming?can?increase? the?recovery?of?vanadium.?Additionally,?the?optimum?magnetic?processing?result? was?met?when?the?magnetic field?intensity?is?14000 Oe. By?processing?ore?using?sediment-magnetic?separation?united?process,?the tailings grade which is 0.15% and ?the?recovery? is?16.57%?can be thrown away, and a?final concentrate?that?has?2.10%?V2O5?and the?recovery?is?83.43%?can?be?gotten.