摘要
为了确定某高钙高硅低品位难选萤石矿适宜的选矿工艺流程及药剂制度,获得满意的试验指标,针对该矿石中含CaCO₃矿物含量高,结晶粒度细,大部分萤石矿物结晶粒度粗,少部分萤石与石英矿物相互包裹的特点,进行了浮选工艺探索、粗选磨矿细度、抑制剂种类、再磨位置及磨矿细度条件试验研究。试验结果表明:采用粗磨—粗选—2次精选—精矿再磨—5次精选的两段磨矿流程,粗选磨矿细度为-0.074 mm60%,精选抑制剂采用水玻璃+DDE组合,最佳再磨位置为3次精选后,再磨细度为-0.038 mm75%,闭路试验获得了CaF₂品位97.50%、回收率90.08%的萤石精矿;通过阶段磨矿、阶段选别工艺可有效解决萤石与石英包裹体解离及方解石泥化影响的问题,采用水玻璃+DDE组合抑制剂可替代传统抑制剂,实现对含碳酸钙矿物的有效抑制。
In order to determine the suitable beneficiation process flow and reagent system for a high calcium,high silicon and low grade refractory fluorite ore,and obtain satisfactory test indexes,aiming at the characteristics of high CaCO3 mineral content,fine crystal size,coarse crystal size of most fluorite minerals and mutual encapsulation of a small part of fluorite and quartz minerals in the ore,the flotation process exploration,roughing grinding fineness,inhibitor type,regrinding position and grinding fineness conditions are studied.The test results show that the two-stage grinding process of roughing grinding-roughing-two cleaning-concentrate regrinding-five cleaning is adopted.The grinding fineness of roughing is-0.074 mm 60%.The cleaning inhibitor adopts the combination of water glass and DDE.The best regrinding position is after three cleanings,and the regrinding fineness is-0.038 mm 75%.The fluorite concentrate with CaF2 grade of 97.50%and recovery of 90.08%is obtained in the closed-circuit test.The problem of fluorite and quartz inclusions dissociation and the influence of calcite argillization can be effectively solved by stage grinding and stage separation process.The use of water glass+DDE combined inhibitors can replace traditional inhibitors to achieve effective inhibition of calcium carbonate-containing minerals.
作者
罗麟
周力
LUO Lin;ZHOU Li(Sinosteel Mining Co.,Ltd.)
出处
《现代矿业》
2025年第7期142-144,149,共4页
Modern Mining
关键词
萤石矿
低品位
高钙高硅
阶段磨矿
fluorite ore
low grade
high calcium and high silicon
stage grinding
