十二胺体系中不同磨矿方式对石英可浮性的影响

立式辊磨机是一种集中碎、粉磨、快速烘干、高效选粉等工序为一体的高效设备。本文研究了立式辊磨、干式球磨和湿式球磨三种磨矿方式下石英的表面特性,并考察了十二胺体系下,不同矿浆pH值、捕收剂和调整剂用量下,三种磨矿方式对石英可浮性的影响。结果表明,不同的浮选条件下,立式辊磨机石英样品的回收率基本都高于球磨干式磨矿和球磨湿式磨矿。较优的浮选工艺参数为矿浆pH值8.5,捕收剂十二胺用量为100mg/L,不添加六偏磷酸钠和水玻璃,金属阳离子CaCl2浓度100mg/L。立式辊磨机石英样品较高的表面粗糙度和比表面积提升了浮选过程中十二胺的吸附能力,从而提升石英的回收率。

Effect of different grinding methods on floatability of quartz in dodecylamine system

Vertical roller mill is an efficient equipment that integrates crushing, grinding, rapid drying, efficient powder separation and other processes. In this paper, the surface characteristics of quartz ground by vertical roller mill, dry-ball mill and wet-ball mill were analyzed. Effects of three grinding methods on the floatability of quartz under different slurry pH values, collector and regulator dosage in the dodecylamine system were further investigated. The results show that under different flotation conditions, the recovery of quartz samples from vertical roller milling is basically higher than that from ball milling dry grinding and wet grinding. The better flotation process parameters are pulp pH 8.5, the dosage of collector dodecylamine is 100mg/L, sodium hexametaphosphate and sodium silicate are not added, and the concentration of metal cation CaCl2 is 100mg/L. The high surface roughness and specific surface area of quartz samples from vertical roller mill improve the adsorption capacity of dodecylamine in the flotation process, thus improving the recovery rate of quartz.