摘要
湖南某低品位沉积型海泡石矿中海泡石品位为28.9%,主要脉石矿物为石英、滑石和方解石。为尽可能提高矿石中海泡石品位,简化选矿流程,依据原矿性质,确定采用水浸—筛分—分散—沉降的工艺流程进行选矿试验研究。原矿经水浸后,用筛孔尺寸为74μm的筛子筛分,将筛分得到的细粒级产品进行分散试验,经分散条件优化后,确定了适宜分散剂种类为焦磷酸钠,适宜的添加量为0.8 g/L,分散固液比为1∶10 mg/L,分散时间为20 min,分散机转速为2000 r/min,矿浆pH值为9。全流程试验最终获得海泡石精矿品位92.77%,富集比3.21,实现了该海泡石矿资源的高效提纯。
The grade of a low-grade sedimentary sepiolite ore from Hunan Province is 28.90%,and the main gangue minerals are quartz,talc and calcite.In order to improve the grade of sepiolite as much as possible and simplify the beneficiation process,the flowsheet of water leaching,sieving,dispersion and sedimentation was carried out according to the properties of the raw ore.After water leaching,the raw ore was sieving with a 74μm sieve,and the fine grained products were screened for dispersion test.After optimization of dispersion conditions,the proper dispersant was determined as sodium pyrophosphate,and the proper addition amount was 0.8 g/L.The grade of sepiolite was 92.77%and the enrichment ratio was 3.21 with the dispersion solid-liquid ratio of 1∶10 mg/L,the dispersion time of 20 min,the dispersant speed of 2000 r/min and the slurry pH of 9,which realized the efficient purification of sepiolite resource.
作者
侯凯
郑承辉
张俊华
杨华明
HOU Kai;ZHENG Chenghui;ZHANG Junhua;YANG Huaming(School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,China;Hunan Provincial Key Laboratory of Mineral Materials and Applications,Changsha 410083,China;College of Mining Engineering,Taiyuan University of Technology,Taiyuan 030002,China)
出处
《金属矿山》
CAS
北大核心
2022年第7期181-186,共6页
Metal Mine
基金
国家自然科学基金项目(编号:52104261)
山西省基础研究计划项目(编号:20210302124223)。
关键词
低品位
海泡石
粒度筛析
分散
沉降高度
low grade
sepiolite
particle size screening analysis
dispersion
sedimentation height
