攀钢选钛厂强磁尾矿再选工艺研究

发布时间：2018-05-12 10:24

本文选题：铁尾矿 + 细粒钛铁矿　；参考：《昆明理工大学》2015年硕士论文

【摘要】：近十年来,攀钢选钛厂通过高效回收钛铁矿的工艺及装备研究,取得了一定成就,提高了选钛回收率。但总的来说,其选钛工艺中存在着设备繁多、流程复杂、药剂量大和成本高等问题,如何有效地提高资源利用率,能够为攀钢集团带来经济效益。考察了攀钢选钛厂细粒级钛精矿生产线,在二段高梯度磁选中通过一次扫选得到的尾矿直接排入了尾矿库。这部分尾矿的钛品位为6%左右,每天的排放量达900吨,其中可利用的钛资源总量较高,直接进入尾矿库造成了极大的资源浪费。本论文以攀钢选钛厂前八系列中,二段强磁选的扫选尾矿为研究对象,进行了研究,包括原子光谱分析、化学多元素分析、钛矿物物相分析以及矿物粒度分析。工艺矿物学研究表明：原矿样中钛品位偏低,仅为5.21%。其中钛矿物的分布相对集中,绝大部分赋存在钛铁矿中,其次是钛磁铁矿。钛矿物粒度较细,分布不均匀,粗粒级的单体解离度偏低,-0.074mm-+0.019mm粒级的占42.18%。针对原矿样的性质,进行了细致的钛回收工艺研究,采用了磁选粗选抛尾,磁精矿经磨矿后进入悬振锥面选矿机重选的工艺流程。研究内容包括：磁选粗选探索试验、磨矿细度试验、工艺参数试验以及精选次数试验,精选次数试验表明只需要二次精选即可获得满意的钛精矿。当设备工艺参数最佳时,通过悬振锥面选矿机二次精选得到的钛精矿品位为42.37%,回收率为43.01%。最后,将钛精矿浮选脱硫,所得硫精矿中S品位为23.52%,回收率达到89.80%；浮硫尾矿中0.16%的S品位说明脱硫有效。在前期开路试验基础上开展了闭路流程试验,最终获得品位44.23%,回收率45.85%的钛精矿。
[Abstract]:In the past ten years, Panzhihua Iron and Steel Co., Ltd has achieved some achievements and improved the recovery rate of titanium through the research on the technology and equipment of high efficiency recovery of ilmenite in Panzhihua Iron and Steel Co. But in general, there are many problems in the titanium separation process, such as various equipment, complicated process, large amount of medicament and high cost. How to improve the utilization ratio of resources effectively can bring economic benefits to Panzhihua Iron and Steel Group. The fine grained titanium concentrate production line of Panzhihua Iron and Steel Co., Ltd was investigated. The tailings obtained by one sweep separation in the second stage of high gradient magnetic separation were discharged directly into the tailings reservoir. The titanium grade of this part of tailings is about 6%, and the daily discharge is 900 tons, among which the total amount of available titanium resources is relatively high, which has caused a great waste of resources by entering the tailings reservoir directly. In this paper, the scavenging tailings of the second stage high magnetic separation in the first eight series of titanium separation plant of Panzhihua Iron and Steel Co., Ltd were studied, including atomic spectrum analysis, chemical multielement analysis, titanium mineral phase analysis and mineral particle size analysis. The technological mineralogical study shows that the titanium grade in the raw ore sample is low, only 5.21. The distribution of titanium minerals is relatively concentrated, most of them occur in ilmenite, followed by ilmenite. The particle size of titanium mineral is fine and the distribution is uneven. The monomer dissociation degree of coarse grained grade is lower than 0.074 mm- 0.019mm particle level, and 42.18%. According to the properties of raw ore, a detailed titanium recovery process was studied, and the process of gravity separation of magnetic concentrate was adopted by rough separation and tail-dressing, and by grinding the magnetic concentrate into the suspended vibration cone concentrator. The research contents include: exploration test of magnetic separation, grinding fineness test, technological parameter test and cleaning times test. The cleaning times test shows that the satisfactory titanium concentrate can be obtained only by twice cleaning. When the process parameters of the equipment are the best, the titanium concentrate grade obtained by the secondary cleaning of the suspended vibration cone concentrator is 42.37 and the recovery rate is 43.01. Finally, the sulfur concentrate is desulphurized by flotation, the S grade of the concentrate is 23.522.The recovery rate is 89.80, and 0.16% S grade in the floating sulfur tailings shows that the desulphurization is effective. The closed circuit test was carried out on the basis of the open circuit test. Finally, the titanium concentrate with a grade of 44.23 and a recovery of 45.85% was obtained.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD926.4

【引证文献】