白云鄂博钪矿物分选试验研究

发布时间：2018-02-28 14:14

  本文关键词： 钪 X射线分选 磁选 反浮选 浮选药剂　出处：《内蒙古科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：白云鄂博矿是我国著名的一座以铁、稀土、萤石为主，并含有钪、铌等特大型复杂共伴生矿床。其中的钪是一种典型的稀散重稀土元素，且在白云鄂博矿中未发现其的独立矿物。钪具有很多优良的物理、化学性质，使其被广泛应用于航天、军事、机械、电子、材料等重要领域。目前对白云鄂博矿中钪资源的利用率为0%，所以，利用传统选矿方法从白云鄂博矿的各种矿石中回收含钪矿物具有重要的经济环保意义，符合当下我国国情。 目前包钢选厂采用的是“弱磁-强磁-浮选”工艺流程，两条路线对白云鄂博矿进行分选回收，一条路线是：弱磁选、强磁选再反浮选综合回收铁与萤石；另一条路线是：强磁选的中矿浮选回收稀土。 近几年，国内许多研究单位、高校对白云鄂博矿铁、稀土、铌、萤石的回收利用有很多相关的报告，如：利用组合抑制剂优化包钢选矿厂稀土浮选药剂，采取选冶联合工艺综合回收白云鄂博资源，白云鄂博尾矿再回收铁、稀土、萤石等研究。关于利于传统选矿的方法回收白云鄂博矿中钪资源长沙矿冶研究院和我校李梅老师课题组等在这方面进行了有关研究，但关于其的研究的报告还是比较少。实现白云鄂博矿中多资源的综合回收利用是发展方向。 本研究利用X射线分选技术对白云鄂博原矿进行含钪矿物分选与依次分选钍、铌、稀土矿物，然后选择X射线依次分选钍、铌、稀土矿物后得到的尾矿代替矿量不足的钪精矿进行分选含钪矿物试验研究，回收含钪矿物试验采用“弱磁-反浮选”工艺流程。本研究得到了如下成果： ⑴根据元素特征X射线的唯一性，利用X射线分选机，在矿石粒级为3-15cm的条件下，进行一次含钪矿物分选得到了250ppm左右的钪精矿；采用先分选钍矿再分选铌矿之后再分选稀土矿的工艺，在阈值为0.13，得到了品位0.04%，回收率30.13%的钍精矿；在阈值为0.2，得到了品位0.21%，回收率14.46%的铌精矿；在阈值为0.62，得到了品位11.27%，回收率25.18%的稀土精矿；得到了钪品位105.89ppm，回收率51.72%的X射线分选尾矿。 ⑵在磨矿细度-200目90%的条件下，采用磁场强度为95.5KA/M对X射线分选尾矿磁选，得到了品位为62.02%，回收率为66.04%的铁精矿及钪品位110.3ppm，回收率72%的磁选尾矿。 ⑶在矿浆浓度40%，矿浆温度40℃，-200目占94.5%，pH=9.5，Na2CO3作pH调整剂，，水玻璃用量3kg/t，油酸用量1.8kg/t的条件下，对磁选尾矿进行粗选试验，得到了品位242.75ppm，回收率50.82%的钪粗精矿；对所得的钪粗精矿进行3次精选最终得到了品位418.72ppm，回收率31.20%的钪精矿。
[Abstract]:The Bayan Obo ore deposit is a famous ore deposit of iron, rare earth, fluorite, and contains SC, NB, etc., among which scandium is a typical dilute and heavy rare earth element. Scandium has many excellent physical and chemical properties, which make it widely used in aerospace, military, mechanical, electronic, etc. At present, the utilization ratio of scandium resources in Baiyunebo Mine is 0. Therefore, it is of great economic and environmental significance to recover scandium bearing minerals from all kinds of ores in Baiyunebo Mine by traditional ore dressing method, which is in line with the current situation of our country. At present, Baotou Iron and Steel Co., Ltd is using the "weak Magnetic-strong Magnetic-flotation" technological process. Two routes are used for separation and recovery of Baiyunebo ore. One route is: weak magnetic separation, strong magnetic separation and reverse flotation comprehensive recovery of iron and fluorite; Another route is: strong magnetic separation of ore flotation recovery of rare earths. In recent years, many domestic research units and universities have reported on the recovery and utilization of iron, rare earth, niobium and fluorite from Baiyunebo Mine, such as optimizing the flotation reagents of rare earth in Baotou Iron and Steel Concentrator by using combined depressants. Comprehensive recovery of Bayan Obo resources by combined processing of processing and metallurgy, and recycling of iron and rare earths from Bayan Obo tailings, On the recovery of Scandium from Baiyunebo Mine by traditional methods of dressing, the Changsha Institute of Minerals and Metallurgy and the teacher Li Mei of our school have carried out relevant studies in this respect. But there are few reports on the research, and it is the development direction to realize the comprehensive recovery and utilization of many resources in Bayan Obo Mine. In this paper, the mineral separation of scandium bearing minerals and the separation of thorium, niobium and rare earth minerals from Baiyunebo raw ore were carried out by using X-ray separation technology, and thorium, niobium and rare earth minerals were sequentially separated by X ray. The tailings obtained from rare earth minerals are used to separate the scandium bearing minerals instead of the scandium concentrate, and the technological process of "weak magnetic field reverse flotation" is used to recover the scandium bearing minerals. The results are as follows:. 1 according to the uniqueness of the elemental characteristic X-ray, the scandium concentrate of about 250ppm was obtained by using X-ray separator under the condition of ore particle size of 3-15cm. The thorium concentrate with a grade of 0.04 and a recovery of 30.13% is obtained by the process of separating thorium ore and then separating niobium ore before separating rare earth ore at the threshold of 0.13, and the niobium concentrate with grade 0.21 and recovery rate of 14.46% is obtained when the threshold value is 0.2. At the threshold value of 0.62, the rare earth concentrate with a grade of 11.27 and a recovery of 25.18% was obtained, and the tailings with a grade of 105.89 ppm of scandium and a recovery of 51.72% were obtained. 2 under the condition of grinding fineness-200 mesh 90%, the magnetic field intensity is 95.5KA / M for the magnetic separation of tailings by X-ray separation, the iron concentrate with grade 62.02and the recovery rate 66.04% and the tailings with SC grade 110.3ppm and 72% recovery are obtained. (3) under the conditions of 40% pulp concentration, 40 鈩

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