助磨剂对石英磨矿效果及浮选行为的影响

Effect of Grinding Aids on Quartz Grinding Efficiency and Flotation Behavior

磨矿作业在矿物加工过程中具有重要地位,添加助磨剂可改善物料的可磨性。为了研究助磨剂对石英粉磨效果及浮选行为的影响,在最佳磨矿条件下以高纯石英作为试验物料,选择三乙醇胺、丙酮、油酸钠、氯化铵和氯化钠作为助磨剂研究了不同助磨剂及其用量对石英磨矿效率的影响,结果表明:三乙醇胺、丙酮、氯化铵和氯化钠4种助磨剂在最佳用量条件下,磨矿产品中-0.074 mm含量分别提高了2.16、2.66、1.22、0.14个百分点,而油酸钠则对石英粉磨起阻磨作用;在此基础上,选择对石英具有助磨作用的三乙醇胺、丙酮、氯化铵和氯化钠研究了助磨剂对石英浮选行为的影响,结果表明,助磨剂三乙醇胺在十二胺体系和油酸钠体系中均可提高石英浮选回收率,分别提高了5.83个百分点和4.94个百分点,其他3种助磨剂则对石英浮选回收率具有不利影响。试验结果可以为助磨剂在石英及其它物料磨矿中的应用奠定基础。

Grinding plays an important role in mineral processing.Adding grinding aids in the grinding process can improve the grindability of materials.In order to study the effect of grinding aids on quartz grinding effect and flotation behavior,the effects of different grinding aids and their amounts on the grinding efficiency of quartz were studied by using high pure quartz as test material under the optimal grinding conditions,and choosing triethanolamine,acetone,sodium oleate,ammonium chloride and sodium chloride as grinding aids.The results showed that the content of-0.074 mm increased by2.16,2.66,1.22 and 0.14 percentage points respectively under the optimal dosage conditions for triethanolamine,acetone,ammonium chloride and sodium chloride.While sodium oleate had resistance effect on quartz grinding.On the basis of above studies,the effects of triethanolamine,acetone,ammonium chloride and sodium chloride on the flotation behavior of quartz were studied.The results showed that triethanolamine could increase the recovery of quartz flotation by 5.83 percentage points and 4.94 percentage points respectively in dodecylamine flotation system and sodium oleate flotation system.But,the other grinding aids had adverse effects on the recovery of quartz flotation.The experimental results laid a foundation for the application of grinding aid in quartz and other materials grinding.