某含铬钛铁矿强磁粗精矿闪速焙烧试验研究

为降低国外某钛铁矿强磁粗精矿中的铬含量,使其能用于生产氯化钛白,对其进行了闪速焙烧试验研究。冷态模拟试验确定了闪速焙烧的最佳操作气速为0.61~0.69 m/s,热态试验确定了矿样闪速焙烧的最佳焙烧温度、焙烧时间分别为800℃和100 s,气体流速为0.69 m/s,焙烧产品在干式磁选磁场强度318 kA/m、滚筒转速25r/min条件下,最终可获得精矿TiO2品位47.18%、杂质Cr2O3含量0.25%、TiO2回收率87.23%的选别指标,精矿质量符合三级钛铁矿精矿质量要求,研究结果可为含铬钛铁矿资源的合理开发利用提供技术支持。

Flash-Magnetic Roasting Experiments Study on High Intensity Magnetic Concentrate which Contained Chromite

In order to reduce the chromium-content of a certain ilmenite high intensity magnetic concentrate， ensure that it can be economically and reasonably used in titanium dioxide chloride process， the flash-magnetic roasting experiments were carried out. The cold-state simulation studies determined the optimal operation gas velocity was 0.61~0.69 m/s， the high-temperature state studies determined the optimal roasting temperature and roasting time was 800 ℃ and 100 s， respectively the gas velocity was 0.69 m/s. Magnetic concentrate index that TiO₂ grade 47.18%， impurity of Cr₂O₃ content is 0.25% and TiO₂ recovery 87.23% were obtained through the dry high intensity magnetic separation， the concentrate quality meets the grade three of ilmenite concentration quality standard. The research can provide a technical reference for the beneficiation of high chromium ilmenite ore．