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金属矿山 ›› 2022, Vol. 51 ›› Issue (07): 181-186.

• 矿物工程 • 上一篇    下一篇

某低品位沉积型海泡石提纯试验研究

侯凯1,2,3郑承辉1,2张俊华1,2杨华明1,2   

  1. 1.中南大学资源加工与生物工程学院,湖南 长沙 410083;2.矿物材料及其应用湖南省重点实验室,湖南 长沙 410083;3.太原理工大学矿业工程学院,山西 太原 030002
  • 出版日期:2022-07-15 发布日期:2022-07-31
  • 基金资助:
    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)。

Purification Experiments Research of a Lowgrade Sedimentary Sepiolite

HOU Kai1,2,3ZHENG Chenghui1,2ZHANG Junhua1,2YANG Huaming1,2   

  1. 1.School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,China;2.Hunan Provincial Key Laboratory of Mineral Materials and Applications,Changsha 410083,China;3.College of Mining Engineering,Taiyuan University of Technology,Taiyuan 030002,China
  • Online:2022-07-15 Published:2022-07-31

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74 μm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2 000 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。

关键词: 低品位, 海泡石, 粒度筛析, 分散, 沉降高度

Abstract: 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 74 μm 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 2 000 r/min and the slurry pH of 9,which realized the efficient purification of sepiolite resource.

Key words: low grade, sepiolite, particle size screening analysis, dispersion, sedimentation height