Flotation separation of quartz from magnesite using carboxymethyl cellulose as depressant  

以羧甲基纤维素为抑制剂浮选分离石英和菱镁矿

作　　者：Yang-ge ZHU Lin-feng YANG Xiao-xing HU Xing-rong ZHANG Gui-bing ZHENG 朱阳戈;杨林峰;胡晓星;张行荣;郑桂兵(矿冶科技集团有限公司矿物加工科学与技术国家重点实验室,北京100160)

机构地区：[1]State Key Laboratory of Mineral Processing,BGRIMM Technology Group,Beijing 100160,China

出　　处：《Transactions of Nonferrous Metals Society of China》2022年第5期1623-1637,共15页中国有色金属学报（英文版）

基　　金：the financial support from the National Natural Science Foundation of China(No.51774041)。

摘　　要：Carboxymethyl cellulose(CMC)was introduced as a depressant in reverse flotation separation of quartz from magnesite.The flotation behavior and surface properties of magnesite and quartz exposed to CMC were studied by zeta potential tests,atomic force microscopy imaging and contact angle measurements.The addition of CMC as the depressant in reverse flotation using dodecylamine(DDA)as the collector exhibited a selectively depressive performance towards magnesite and achieved an improved recovery of magnesite.The study of surface properties demonstrated that CMC and DDA exhibited different adsorption strengths on the surface of magnesite and quartz.It was found that the adsorption of CMC on magnesite surface was stronger than that of DDA,which hindered the subsequent adsorption of DDA on magnesite surface.On the contrary,the quartz surface was strongly adsorbed by DDA instead of CMC,which proved that the addition of CMC did not influence the flotation of quartz.研究羧甲基纤维素(CMC)作为抑制剂在菱镁矿反浮选脱硅过程中的作用,通过动电位测试、原子力显微镜检测和接触角测试考察在CMC作用下菱镁矿与石英的浮选行为与表面性质变化。当以十二胺(DDA)为捕收剂时,以CMC为抑制剂进行菱镁矿脱硅反浮选,CMC的添加对菱镁矿表现出良好的选择性抑制作用,并提高菱镁矿回收率。表面性质研究表明,在菱镁矿和石英表面CMC和DDA的吸附强度存在明显差异,CMC在菱镁矿表面的吸附强于DDA,从而阻碍后续DDA的吸附;而在石英表面则相反,DDA的吸附强于CMC,因此CMC基本不影响石英的可浮性。

关 键 词：flotation separation carboxymethyl cellulose DODECYLAMINE MAGNESITE QUARTZ 

分 类 号：TD923[矿业工程—选矿]