某菱镁矿提纯试验研究  

Research on Purification of Magnesite by Flotation

作　　者：魏茜[1] 刘忠荣[1] 易运来[1] 

机构地区：[1]湖南有色金属研究院,湖南长沙410015

出　　处：《矿产保护与利用》2012年第6期32-34,共3页Conservation and Utilization of Mineral Resources

摘　　要：针对某低品位菱镁矿石中主要杂质矿物石英嵌布粒度极细的特点,试验选择在细磨条件下先反浮选后正浮选的工艺流程,控制磨矿细度-200目占92.6%,反浮选在pH≈5.5、十二胺350 g/t,正浮选在pH=9.5～10、水玻璃3 500 g/t、油酸钠1 500 g/t的条件下进行,得到含MgO 46.85%、SiO21.21%的菱镁矿精矿。For a low-grade magnesite ore with fine disseminated quartz as a main impurity mineral,tests were carried out at fine grinding conditions,and a technological flowsheet including firstly reverse flotation and then direct flotation was adopted.With a grinding fineness of 92.6%-0.074 mm,the reverse flotation was carried out with 350 g/t of lauryl amine solution at around pH 5.5,and the direct flotation was carried out with 3 500 g/t of sodium silicate solution and with 1 500 g/t sodium oleate solution at a pH range from 9.5 to 10.A magnesium concentrate contenting 46.85% MgO and 1.21% SiO2 was obtained.

关 键 词：菱镁矿 脱硅 反浮选 正浮选 

分 类 号：TD973.9[矿业工程—选矿] TD923