摘要
为了提高我国低品位膨润土资源的工业附加值,本论文以山东某地低品位膨润土为原料,在工艺矿物学研究基础之上,采用水力旋流器-离心机联合提纯工艺研究了药用蒙脱石的提纯工艺以及提纯产品的药用性能。研究发现膨润土中主要杂质矿物为α-石英和长石,膨润土颗粒粒度大小和蒙脱石含量负相关,蒙脱石主要分布于-325目粒级中,该粒级中蒙脱石分布率达到46.03%。利用水力旋流器-离心机联合分选工艺,在水力旋流器给矿浓度10%,给矿压力0.05MPa,沉砂嘴直径为10mm时进行预选,蒙脱石品位提高到51.41%,相应粗精矿产率为40.98%;预选粗精矿经过离心机一次精选,三次扫选进行深度提纯,在给矿浓度5%,给矿速度1.50m^3/h,离心机转速2 304r/min的工艺条件下,获得综合精矿品位为93.56%,合计产率为9.06%,回收率为22.91%,取得较理想的分选指标,制备出的高纯蒙脱石吸附力(0.48g/g)等各项指标较好的满足了药用蒙脱石的质量指标要求,实现了低品位膨润土资源的高附加值利用。
Based on the study of processing mineralogy,the joint purification by hydrocyclcone and centrifuge is used to study the purification technique of medicinal montmorillonite and the medicinal properties of the purified product. It shows that the main impurity minerals in low- grade bentonite are α-quartz and feldspar. The particle size of bentonite is negatively correlated with the content of montmorillonite and the distribution rate of montmorillonite in 325 meshes is up to 46.03%. The process conditions of hydrocyclone and centrifuge joint purification are 10~ feed concentration,0.05 MPa pumping pressure,and 10 mm underflow diameter of the hydrocyclone. It shows that the grade of the crude concentration increases up to 51.41% and the corresponding yield is 40.98%. Pre-separated crude concentrate is re separated by the centrifuge. After one cleaning and three scavenging circuits under the conditions of feed concentration 5%, feed speed h 50 m^3/h,and centrifuge speed 2 304 r/min,the montmorillonite grade of the comprehen- sive concentrate is 93.56% ,the total yield is 9.06% ,and the recovery rate is 22.91%. The quality indexes of the high-purity montmorillonite,such as the medicinal adsorption capacity (0.48 g/ g) and other indexes,meet the quality requirement of the medicinal montmorillonite. This method improved and increased the added-value of low-grade bentonite.
作者
邱俊
王志明
李国青
陈平
王桂芳
吕宪俊
QIU Jun;WANG Zhiming;LI Guoqing;WANG Guifang;LV Xianjun CHEN Ping(College of Chemical and Environmental Engineering,SDUST,Qingdao 266590,China;School of Resources,Environment and Materials,Guangxi University,Nanning 530004,China;Shandong Institute of Geological Sciences,Jinan 250013,China)
出处
《矿物岩石》
CAS
CSCD
北大核心
2018年第3期1-6,共6页
Mineralogy and Petrology
基金
国家自然科学基金(51774200,51204104)