从海滨石英砂尾矿中综合回收锆钛实验

    Experiment on the Comprehensive Recovery of Zirconium and Titanium from Seaside Quartz Sand Tailings

    • 摘要: 实验样品为海南文昌石英砂尾矿,主要矿物为锆英石、钛铁矿、金红石、石英,及少量电气石、长石、镁铁矿等。原矿含ZrO2 0.23%、TiO2 0.47%、SiO2 97.80%,锆、钛矿物主要分布在-0.15+0.063 mm粒级,适合选矿回收。根据矿石性质,采用“螺旋溜槽一粗一扫、重矿物合并摇床精选”的重选预选抛尾工艺流程,获得产率为1.71%,含ZrO2 12.92%、TiO2 23.15%,回收率分别为94.93%、84.13%的预选粗精矿。该预选粗精矿通过“高梯度强磁选-重选”联合流程,得到合格的钛铁矿产品和高品位的锆钛混合矿物;锆钛混合矿物再经浮选分离得到合格的锆英砂和金红石产品。预选尾矿中的石英砂经“重选-强磁选-擦洗-分级”工艺提纯后,获得光伏玻璃用石英砂产品。该工艺实现了尾矿中有价组分的综合回收,为同类型资源的开发利用提供参考。

       

      Abstract: The test sample is quartz sand tailings from Wenchang, Hainan, and the main minerals are zircon, ilmenite, rutile, quartz, and a minor quantity of tourmaline, feldspar, magnesioferrite, and so forth. The original ore contains 0.23% ZrO2, 0.47% TiO2, and 97.80% SiO2, and the zircon and titanium minerals are mainly distributed within the 0.15 mm to 0.063 mm particle size range, making them suitable for beneficiation and recovery. According to the nature of the ore, the re-election pre-election tailing throwing process flow of spiral chute, comprising one roughing and one scanning, heavy mineral combined shaking table selection, yielded a mineral yield of 1.71%, containing ZrO2 12.92%, TiO2 23.15%. The recovery rate of the pre-election rough concentrate was 94.93% and 84.13%, respectively. Furthermore, the pre-selected crude concentrate was subjected to a combined high-gradient strong magnetic separation-heavy separation process, which yielded a qualified ilmenite product and high-grade zircon and titanium mixed minerals. The high-grade zircon and titanium mixed minerals were then subjected to flotation separation, resulting in the production of qualified zircon sand and rutile products. Additionally, the quartz sand present in the pre-selected tailings is purified through the process of "gravity separation-strong magnetic separation-scrubbing-classification", thus providing quartz sand for photovoltaic glass. This process achieves the comprehensive recovery of valuable components from the tailings, providing a reference for the development and utilization of similar resources.

       

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