微细粒贫赤铁矿重选工艺优化试验研究

发布时间：2019-06-13 18:57

【摘要】：为改善司家营重选工艺中微细粒赤铁矿的回收效果,本文以现场水力旋流器的沉砂为研究对象,进行全粒级入选和窄级别入选两种方案的重选工艺优化试验研究。结果表明,矿样全粒级入选可获得铁品位为64.26%,回收率为77.82%的精矿产品,其分级试验结果表明,+0.1 mm粒级品位仅为32.66%,远远低于其他粒级品位,这是造成重选产品品位偏低的重要因素。在窄级别入选试验中,随着矿粒粒级的减小,其选别的最佳浓度值也逐渐减小,最终得到了品位为67.13%,回收率为77.09%的铁精矿产品。与全粒级入选试验相比,窄级别入选试验的效果更好,在回收率相差不大的情况下,铁品位提高了近3%。
[Abstract]:In order to improve the recovery effect of fine hematite in Sijiaying gravity separation process, the sand settling of field hydrocyclone was taken as the research object, and the optimization test of full grain size selection and narrow grade selection was carried out in this paper. The results show that the concentrate with iron grade of 64.26% and recovery of 77.82% can be obtained. The classification test results show that the grain grade of 0.1 mm is only 32.66%, which is much lower than that of other grain grades, which is an important factor for the low grade of gravity separation products. In the narrow grade selection test, with the decrease of ore particle size, the optimum concentration value of the separation decreased gradually, and finally the iron concentrate product with grade of 67.13% and recovery of 77.09% was obtained. Compared with the full grain size selection test, the effect of narrow grade selection test is better, and the iron grade is increased by nearly 3% under the condition that the recovery rate is not much different.
【作者单位】：华北理工大学矿业工程学院河北省矿业开发与安全技术实验室;天津天狮学院生物与食品工程学院;
【基金】：国家科技部国际合作项目资助(2012DFR70320) 河北省自然科学基金资助项目资助(E2013209308) 华北理工大学科学研究基金项目资助(Z201301)
【分类号】：TD951

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