调整剂对菱镁矿浮选的影响研究试验

发布时间：2018-07-05 02:00

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】：本文所采用的菱镁矿取自辽宁省海城市,其菱镁矿矿石的矿物组成相对复杂,且矿物种类较多。其中主要矿物为菱镁矿,其它伴生矿物有石英、滑石、斜绿泥石、白云石等,但含量均较低。菱镁矿具有较高的耐火性、粘结性及其优良的物理化学特性,在冶金、化工、建材、轻工及金属镁提纯等领域有着广泛的应用。本课题进行的调整剂对菱镁矿浮选的影响试验,制定出最优的工艺流程及药剂制度,以便提高精矿中MgO的品位及回收率。长期以来,在菱镁矿的浮选过程中通常选用反—正浮选工艺流程,分别在十二胺和油酸体系下进行。从某种意义上来讲,添加适量的调整剂能够有效地将有用矿物和脉石矿物分选。本课题通过进行调整剂的选择及用量试验的对比,得到了优良的产品指标。本课题采用的海城菱镁矿的矿石,主要镁矿物为菱镁矿,含量达86.55%。其次是滑石,含量为4.83%、白云石含量为1.50%,其它的杂质矿物如石英(含量1.53%,斜绿泥石含量为1.25%,磷灰石含量为0.21%和微量铁质等。论文采用三段反浮选两段正浮选的工艺流程对菱镁矿进行浮选。试验结果表明,反浮选试验条件为pH值为6.3,抑制剂六偏磷酸钠用量150g/t,捕收剂十二胺用量150g/t;正浮选试验条件为pH值为12,调整剂六偏磷酸钠用量为200g/t,水玻璃用量2000g/t,捕收剂MB3用量为400g/t。最终得到精矿指标为:MgO品位为47.24%,MgO回收率为75.69%,有害杂质的含量为:SiO2含量占0.06%,CaO含量占0.70%,Fe2O3含量占0.32%,Al2O3含量占0.13%。综上所述,本课题达到预期浮选效果。
[Abstract]:The magnesite ore used in this paper is taken from Haicheng City Liaoning Province. The mineral composition of magnesite ore is relatively complex and there are many kinds of minerals. The main minerals are magnesite, other associated minerals are quartz, talc, clinachlor, dolomite, etc. Magnesite has been widely used in metallurgy, chemical industry, building materials, light industry and metal magnesium purification due to its high fire resistance, adhesion and excellent physical and chemical properties. In order to improve the grade and recovery rate of MgO in concentrate, the optimal technological process and reagent system were worked out through the experiment of the effect of adjusting agent on magnesite flotation. For a long time the reverse-positive flotation process is usually used in the flotation of magnesite in the system of dodecylamine and oleic acid respectively. In a sense, the addition of a suitable amount of adjuster can effectively separate useful minerals from gangue minerals. Through the selection of adjuster and the comparison of the dosage test, the fine product index is obtained. The main magnesia ore of Haicheng magnesite is magnesite with a content of 86.55. The next is talc, 4.83%, dolomite 1.50, and other impurity minerals such as quartz (1.53), clinopyrite 1.25, apatite 0.21% and trace iron, etc. In this paper, magnesite flotation is carried out by three-stage reverse flotation and two-stage positive flotation. The results show that the conditions of reverse flotation are pH 6.3, sodium hexametaphosphate 150g / t, collector dodecylamine 150g / t, pH = 12, sodium hexametaphosphate 200g / t, water glass 2000g / t, collector MB3 400g / t. The recovery rate of MgO is 47.24%, the content of harmful impurity is 0.06% Sio _ 2, the content of Cao is 0.70%, the content of Fe _ 2O _ 3 is 0.32%, the content of Al _ 2O _ 3 is 0.13%, the content of MgO is 75.69%, the content of harmful impurity is 0.06%, the content of Cao is 0.70%, and the content of Fe _ 2O _ 3 is 0.32%. To sum up, this subject achieves the expected flotation effect.
【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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