高强度调浆对微细粒磷灰石浮选效果的影响  

Influence of high-intensity conditioning on fine-grained apatite flotation performance

作　　者：张福亚 张明 侯孝安 胡森伟 ZHANG Fu-ya;ZHANG Ming;HOU Xiao-an;HU Sen-wei(BGRIMM Machinery&Automation Technology Co.Ltd.,Beijing 100160,China;State Key Laboratory of Mineral Processing,Beijing 102600,China)

机构地区：[1]北矿机电科技有限责任公司,北京100160 [2]矿物加工科学与技术国家重点实验室,北京102600

出　　处：《矿冶》2022年第4期139-145,共7页Mining And Metallurgy

基　　金：国家重点研发计划项目(2021YFC2902901)。

摘　　要：高强度调浆是微细粒矿物浮选前重要的预处理手段。在清水条件下,采用高速摄像和浊度的方法分析调浆机叶轮对油滴分散的影响,发现与普通调浆机叶轮相比,高强度调浆机叶轮对油滴的分散效果更显著,搅拌后形成的乳浊液体系更为稳定。据此,利用开发的容积为30 L的高强度调浆机半工业样机处理承德某地的斜板浓密溢流浮选细粒磷。结果表明:与普通调浆机相比,在相同产率(粗选产率为5%~10%)下,采用高强度调浆机处理可使磷灰石的回收率提高约10%,高强度调浆机最佳调浆时间为6 min,最佳线速度为8.35 m/s,且与普通改质机叶轮和直桨叶轮相比,高强度调浆机的鱼骨型叶轮的调浆效果最好,并且能耗较低。High strength slurry mixing is an important pretreatment method before flotation of fine minerals.Under the condition of clean water,the influence of the impeller of the high-strength mixer on the dispersion of oil droplets was analyzed by means of high-speed camera and turbidity.It was found that the impeller of the high-strength mixer had a more significant effect on the dispersion of oil droplets than the impeller of the ordinary mixer,and the emulsion system formed after mixing was more stable.On this basis,the developed semi-industrial prototype of high-strength pulp mixer with a volume of 30 L was used to treat fine phosphorus in a certain place in Chengde.The results show that the recovery of apatite can be increased by about 10%under the same yield(roughing yield of 5%-10%)comparing with the ordinary mixer.The optimal flotation time of the high-strength mixer is 6 min and the optimal linear speed is 8.35 m/s.Comparing with the ordinary modifier impeller and the straight blade impeller,the fishbone impeller of the high-strength mixer has the best mixing effect and lowest energy consumption.

关 键 词：微细粒 溢流 叶轮 浊度 乳浊液 

分 类 号：TD456[矿业工程—矿山机电]