晶质石墨闪速浮选扩大连续试验研究  

Expanded Continuous Experimental Study on Flash Flotation of Crystalline Graphite

作　　者：张福亚 李红帅 孙伟成 张跃军 郝业飞 Zhang Fuya;Li Hongshuai;Sun Weicheng;Zhang Yuejun;Hao Yefei(BGRIMM Machinery&Automation Technology Co.,Ltd.,Beijing 100160;BGRIMM Technology Group,Beijing 100160)

机构地区：[1]北矿机电科技有限责任公司,北京100160 [2]矿冶科技集团有限公司,北京100160

出　　处：《非金属矿》2024年第3期56-57,62,共3页Non-Metallic Mines

基　　金：“十四五”国家重点研发计划项目(2021YFC2902901)。

摘　　要：为防止石墨鳞片在浮选富集过程中多次磨矿而受到严重破坏,设计开发有效容积5 L的闪速浮选装备,将其应用于磨矿分级回路中提前回收已经单体解离石墨,并开展日处理量1.5 t扩大连选试验,采用1粗1扫8次精选部分中矿集中再选的工艺流程。通过和常规不含闪速浮选流程进行对比发现,在精矿固定碳质量分数和固定碳回收率相当的前提下,采用闪速浮选工艺流程,精矿中+0.15 mm粒级产率提高1.99百分点。说明闪速浮选工艺实施有效防止磨矿分级回路中石墨鳞片过磨,实现了将沉砂中已经单体解离石墨提前回收,对于大鳞片的保护具有重要意义。In order to prevent graphite flakes from being severely damaged during the flotation enrichment process due to multi-stage regrinding operations,a flash flotation equipment with an effective volume of 5 L was designed and developed.It was applied to the early recovery of monomer liberated graphite in the grinding and classification circuit,and an expanded continuous flotation experiment with a daily processing capacity of 1.5 t was carried out.The process flow adopted one stage of roughing,one stage of scavanging,eight stage of cleaning,and some middings were centrally re-concentrated.By comparing with the conventional process without flash flotation,it was found that under the premise of equivalent fixed carbon content and fixed carbon recovery rate of the concentrate,the+0.15 mm particle size yield in the concentrate using the flash flotation process increased by 1.99 percentage points.The implementation of flash flotation technology effectively prevents the overgrinding of graphite flake in the grinding and classification circuit,and realizes the early recovery of graphite that has already been dissociated from the settling sand,which is of great significance for the protection of large flake.

关 键 词：石墨 固定碳 回收率 解离 闪速浮选 鳞片 

分 类 号：TD97[矿业工程—选矿]