密地选钛厂粗粒强磁选别工艺优化研究

Process Optimization of Strong Magnetic Separation of Coarse Grain on Midi Titanium Plant

针对密地选钛厂全浮选成本高、产品粒度偏细的问题,对TiO_2品位16.94%的粗粒一段强磁精矿开展了强磁选别工艺优化研究。试验结果表明:采用0.125 mm筛子进行分级,筛上物采用"螺旋+电选"流程、螺旋中矿和电选中矿以及粗渣经过强磁选别后与筛下物混合浮选的流程,可获得TiO_2品位47.67%、回收率34.25%的电选钛精矿与TiO_2品位47.18%、回收率34.83%的浮选钛精矿,即TiO_2品位47.42%、回收率69.08%的混合钛精矿。通过工艺优化,不仅降低了磨矿量,而且优化了最终产品粒级,为工业化生产提供了理论支撑。

In order to solve the problem of high flotation cost and small particles size of TiO2, the optimization study of strong magnetic separation technology was carried out for one stage of high magnetic separation concentrate with a grade of 16.94% of TiO2. The test results showed that: 0.125 mm sieve was used for classification, and then, the process of u spiral and electric separationn was adopted on oversize product;and mixing floatation was adopted after strong magnetic separation on spiral middings, electricmiddings and coarse slag, finally, a electroselective titanium concentrate with TiO2 grade 47.67% and recovery 34.25% and a flotation concentrate with TiO2 grade 47.18% and recovery 34.83% were obtained ,that is, the mixed titanium concentrate with TiO2 grade of 47.42% and recovery of 69.08%. The process optimization not only reduces the amount of grinding, but also optimizes the final product's particle size, and providing theoretical support for industrial production.