菱镁矿正浮选中新型捕收剂的应用研究

发布时间：2018-06-04 19:29

本文选题：菱镁矿 + 浮选　；参考：《辽宁科技大学》2015年硕士论文

【摘要】：我国是世界上镁资源比较丰富的国家,资源类型全,质地优良,分布广泛,我国的菱镁矿资源有着得天独厚的优势。几十年来,我国辽宁省的菱镁矿资源得以大规模的利用,镁产业得到长足发展,以菱镁矿为原料制成的镁质耐火材料取得了举世瞩目的成就。无论是产品的数量、类型,还是产品的质量,我国的已经达到世界较高水平。近年来我国辽南地区已经涌现出一批技术实力和生产能力比较雄厚的镁质材料生产企业,如海城西洋、海城后英、营口青花、营口嘉晨、海城华宇、辽宁中兴及大石桥金龙等集团公司进入中国乡镇企业500强行列,其产品份额及质量均居中国同行前列,部分品种达到世界领先水平,它们为推动辽宁省经济高速增长和中国耐火行业的进步做出了突出贡献。目前,辽宁省的镁质耐火产品已经覆盖了90%的国内市场,得到了全球50多个国家和地区的认可。本课题辽宁海城地区的低品级菱镁矿为原料,经过浮选试验研究和工艺现状分析的基础上,选择合理的浮选工艺流程和药剂制度,实现菱镁矿提纯的目的。本文研究了十二胺、油酸钠、RA-715、MB3新型捕收剂等多种试剂对石英、菱镁矿及杂质矿物浮选行为的影响规律。主要的试验方法有单一矿物可浮性试验、实际矿石浮选分离试验以及试剂与矿物的作用机理研究。单一矿物可浮性试验结果表明,在强碱(pH10)环境中相比于其他试剂MB3新型捕收剂对菱镁矿和白云石浮选有明显的浮游差,对菱镁矿捕收性能较强。反浮选阶段秉着“产率优先,兼顾品位”的原则,选择反浮选精矿指标为产率88.04%、MgO品位46.43%的药剂制度。在反浮选基础上进行正浮选选别,发现使用MB3捕收剂时能达到最优指标:精矿含MgO47.53%;SiO20.12%;CaO、Fe2O3、Al2O3等杂质总含量1.05%;精矿产率达到74.65%。机理研究分析表明:MB3新型阴离子捕收剂能优先吸附于菱镁矿表面,能够较明显地改变菱镁矿表面的电荷;而它在白云石表面上的吸附量要小得多,以此可以达到脱钙的目的。
[Abstract]:Our country is rich in magnesium resources in the world. The resources are of complete type, fine texture and wide distribution. China's magnesite resources have unique advantages. In recent decades, the magnesite resources in Liaoning Province have been utilized on a large scale, and the magnesium industry has been greatly developed. The magnesia refractories made from magnesite as raw materials have made remarkable achievements in the world. Whether it is the quantity, type or quality of products, our country has reached a higher level in the world. In recent years, a number of enterprises producing magnesia materials with relatively strong technical strength and production capacity have emerged in southern Liaoning, such as Haicheng Western Ocean, Haicheng Houying, Yingkou Blue and White, Yingkou Jiachen, Haicheng Huayu, Liaoning Zhongxing, Dashiqiao Jinlong and other group companies are among the top 500 township enterprises in China. Their product share and quality are among the leading in China, and some varieties have reached the leading level in the world. They have contributed significantly to the rapid economic growth of Liaoning Province and the progress of China's refractory industry. At present, the magnesite refractory products in Liaoning Province have covered 90% of the domestic market, and have been recognized by more than 50 countries and regions in the world. In this paper, the low grade magnesite in Haicheng area of Liaoning Province is used as raw material, on the basis of flotation experiment and technological analysis, reasonable flotation process and reagent system are selected to realize the purpose of purification of magnesite. The effects of several reagents, such as dodecylamine, sodium oleate RA-715B _ 3 new collector, on flotation behavior of quartz, magnesite and impurity minerals, have been studied in this paper. The main test methods include the floatability test of single mineral, the flotation separation test of real ore and the mechanism of interaction between reagent and mineral. The results of single mineral floatability test show that the flotation of magnesite and dolomite in the environment of strong alkali pH 10) is obviously worse than that of other reagents MB3, and the recovery property of magnesite is stronger than that of other reagent MB3 in flotation of magnesite and dolomite. In reverse flotation stage, under the principle of "giving priority to yield and giving consideration to grade", the index of concentrate in reverse flotation was selected as the reagent system with yield 88.04 / MgO grade 46.43%. On the basis of reverse flotation, it is found that the optimum index can be achieved when using MB3 collector: the concentrate contains MgO 47.53 SiO 20.12 and the total content of impurities such as CaO47.53 Fe2O3Al _ 2O _ 3 and Al _ 2O _ 3 is 1.05.The concentrate yield reaches 74.65%. The mechanism analysis shows that the new type of anionic collector: MB3 can preferentially adsorb on magnesite surface and can obviously change the charge of magnesite surface, but its adsorption amount on dolomite surface is much smaller, so the decalcification can be achieved.
【学位授予单位】：辽宁科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD923

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