高纯蒙脱石制备工艺试验研究  

Experimental Study on Preparation Technology of High Purity Montmorillonite

作　　者：李彩霞[1] 李俊 徐猛 刘桂祺 洪琰 Li Caixia;Li Jun;Xu Meng;Liu Guiqi;Hong Yan(College of Mining,Liaoning Technical University,Fuxin,Liaoning 123000)

机构地区：[1]辽宁工程技术大学矿业学院,辽宁阜新123000

出　　处：《非金属矿》2021年第2期57-60,共4页Non-Metallic Mines

基　　金：国家自然科学基金青年科学基金(51404133);辽宁工程技术大学创新团队项目(LNTU20TD-34)。

摘　　要：天然膨润土是以蒙脱石为主要成分的黏土矿物,蒙脱石含量决定了天然膨润土的利用价值。本试验采用小锥角水力旋流器-自然沉淀-高速离心联合工艺对天然膨润土进行提纯,利用X射线衍射(XRD)仪、傅里叶变换红外光谱(FTIR)仪和比表面积孔径分析仪对提纯前后膨润土进行表征分析。结果表明,在沉降时间35 h,六偏磷酸钠分散剂用量为0.5%,离心机转速3000 r/min的条件下,提纯后膨润土蒙脱石含量从52%提高到97%,比表面积从23.4613 m2/g增加到67.085 m2/g,吸蓝量从23 g/100 g提升到42.9 g/100 g,提纯效果显著。Natural bentonite is a clay mineral with montmorillonite as the main component.The content of montmorillonite determines the value of natural bentonite.In this paper,a small cone angle hydrocyclone-natural precipitation-high speed centrifugal combined process was used to purify natural bentonite.X-ray diffractometer(XRD),Fourier transform infrared spectrometer(FTIR)and specific surface area pore analyzer were used to characterize and analyze bentonite before and after purification.The results show that under the conditions of a sedimentation time of 35 h,sodium hexametaphosphate dispersant dosage of 0.5%,and centrifuge speed of 3000 r/min,the content of montmorillonite increases from 52%to 97%,the specific surface area increases from 23.4613 m2/g to 67.085 m2/g,and the methylene blue index increases from 23 g/100 g to 42.9 g/100 g,the combined process has a significant purification effect.

关 键 词：膨润土 蒙脱石 提纯工艺 比表面积 吸蓝量 

分 类 号：TD922[矿业工程—选矿] TD97