菱镁矿及其主要伴生矿物白云石的浮选动力学研究

Flotation Kinetics of Magnesite and Its Associated Minerals Dolomite

为了研究不同浓度的调整剂(碳酸钠、氯化钙和氯化镁)对菱镁矿和白云石单矿物浮选回收率及浮选速率的影响,在矿浆pH值为12、油酸钠浓度为0.25 mmol/L的浮选体系下,针对-74+38μm粒级的菱镁矿和白云石,进行了分批刮泡浮选试验,并总结出二者最佳浮选分离流程。结果表明,氯化镁(2.0 mmol/L)为调整剂时菱镁矿与白云石的浮游特性差异较显著,通过两次粗选,粗选1时间为1.0 min,粗选2时间为4.0 min的浮选流程实现二者浮选分离。对氯化镁(2.0 mmol/L)为调整剂时单矿物浮选过程模拟分析可知,分速浮选模型可较好地模拟菱镁矿和白云石的浮选过程。

In order to study the effects of different concentrations of modifiers(sodium carbonate,calcium chloride and magnesium chloride)on flotation recovery and flotation rate of magnesite and dolomite single minerals the batch bleb flotation test was summarized.For-74+38μm particles of magnesite and dolomite,set the pulp pH value to 12,the concentration of sodium oleate to 0.25 mmol/L during the flotation test,and the optimum separation process flotation is obtained.The results show that the difference of floatation characteristics between magnesite and dolomite is significant when magnesium chloride(2.0 mmol/L)as a regulator.The flotation separation of two groups is realized by two coarse selection,1 time for coarse selection is 1.0 min,and 2 time for coarse selection is 4.0 min.The flotation process of magnesite and dolomite can be well simulated by the simulation analysis of the single mineral flotation process of magnesium chloride(2.0 mmol/L)as a regulator.