碳酸盐型萤石矿浮选选择性抑制及机理研究
发布时间：2019-06-11 22:39
【摘要】：以萤石为原料的氟化学工业产品多达几千种,目前尚无替代品,其需求量逐渐增大,是重要的战略性矿物资源。随着我国高品位、易选、单一型萤石矿资源的枯竭,开发利用难选的萤石矿资源已成为氟化学工业发展的重要课题。论文针对新疆某碳酸盐型萤石矿进行了工艺矿物学研究、浮选试验研究,确定了有效回收萤石的最优工艺流程和药剂制度。通过方解石抑制剂的筛选试验研究,找出高效、选择性好的抑制剂,并对抑制剂抑制机理进行研究。矿石性质研究表明,矿石中主要有用矿物为萤石,主要脉石矿物为方解石,其CaF2、CaCO3含量分别为48.00%、37.27%,属于典型的碳酸盐型萤石矿。矿石赋矿岩石主要为石灰岩,矿石结构简单,萤石主要以半自形及它形粒状结构,脉石矿物主要以碳酸盐矿物为主。萤石的粒度、含量、自形程度不同,粒度变化范围较大,粗粒为主,部分与碳酸盐、石英成共生关系。浮选试验研究获得粗选最佳条件为磨矿细度-0.074mm占85%、矿浆温度28~30℃、矿浆pH为6~6.5、调整剂硫酸铝用量1200g/t、调整剂水玻璃用量600g/t、捕收剂皂化油酸用量600g/t。通过不同碳酸盐抑制剂及抑制剂组合试验,选出抑制效果较好抑制剂为TG-1。采用一段磨矿(-0.074mm占85%)、一粗一扫八精选工艺流程和两段磨矿(粗精矿再磨,一段磨矿-0.074mm占85%,二段磨矿-0.037mm占90%)、一粗两扫九精工艺流程闭路试验,分别获得萤石精矿品位90.01%、回收率92.37%和萤石精矿品位97.24%、回收率70.66%的技术指标。试验研究结果表明该药剂制度可以很好分离萤石和方解石,也说明TG-1是一种具有选择性的高效碳酸盐抑制剂。通过TG-1对萤石和方解石作用的单矿物浮选试验、矿物表面润湿性测试、药剂吸附量变化等方法进行了抑制剂作用机理研究。结果表明抑制剂TG-1对萤石抑制作用较小,而对方解石抑制作用显著。电位测试表明,抑制剂TG-1和捕收剂皂化油酸都显著增加了萤石、方解石的电负性,皂化油酸对萤石作用能力更强,而TG-1对方解石吸附能力更强。TG-1与萤石、方解石的作用前后的红外光谱分析发现吸附后矿物表面出现多个新的碳氢振动吸收峰和羟基伸缩振动吸收峰。研究表明TG-1在两种矿物表面的化学吸附由TG-1分子中羧基等与矿物表面钙离子化学作用形成的。
[Abstract]:There are thousands of fluorochemical industrial products with fluorite as raw material. At present, there is no substitute, and its demand is gradually increasing, which is an important strategic mineral resource. With the depletion of high grade, easy selection and single type fluorite ore resources in China, the development and utilization of refractory fluorite ore resources has become an important topic in the development of fluorine chemical industry. In this paper, the process mineralogy and flotation test of a carbonate fluorite mine in Xinjiang were carried out, and the optimal technological process and reagent system for effective recovery of fluorite were determined. Through the screening test of calcite inhibitors, the efficient and selective inhibitors were found out, and the inhibitory mechanism of the inhibitors was studied. The study of ore properties shows that the main useful mineral in the ore is fluorite and the main gangue mineral is calcite. The CaF2,CaCO3 content is 48.00% and 37.27% respectively, which belongs to typical carbonate fluorite ore. The ore-bearing rocks are mainly limestone, the ore structure is simple, the fluorite is mainly semi-self-shaped and its grain structure, and the gangue minerals are mainly carbonate minerals. The grain size, content and self-shape of fluorite are different, the grain size varies widely, the coarse grain is the main, and part of it is symbiotic with carbonate and quartz. The optimum conditions for rough separation are as follows: grinding fineness-0.074mm 85%, pulp temperature 28 鈮，
本文编号：2497508
[Abstract]:There are thousands of fluorochemical industrial products with fluorite as raw material. At present, there is no substitute, and its demand is gradually increasing, which is an important strategic mineral resource. With the depletion of high grade, easy selection and single type fluorite ore resources in China, the development and utilization of refractory fluorite ore resources has become an important topic in the development of fluorine chemical industry. In this paper, the process mineralogy and flotation test of a carbonate fluorite mine in Xinjiang were carried out, and the optimal technological process and reagent system for effective recovery of fluorite were determined. Through the screening test of calcite inhibitors, the efficient and selective inhibitors were found out, and the inhibitory mechanism of the inhibitors was studied. The study of ore properties shows that the main useful mineral in the ore is fluorite and the main gangue mineral is calcite. The CaF2,CaCO3 content is 48.00% and 37.27% respectively, which belongs to typical carbonate fluorite ore. The ore-bearing rocks are mainly limestone, the ore structure is simple, the fluorite is mainly semi-self-shaped and its grain structure, and the gangue minerals are mainly carbonate minerals. The grain size, content and self-shape of fluorite are different, the grain size varies widely, the coarse grain is the main, and part of it is symbiotic with carbonate and quartz. The optimum conditions for rough separation are as follows: grinding fineness-0.074mm 85%, pulp temperature 28 鈮，
本文编号：2497508
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