四川某硅钙质锰矿石强磁选—浮选试验研究

四川某锰品位为21.83%的硅钙质锰矿石锰品位低、嵌布粒度细、磨矿易泥化。为给该矿石的开发利用提供依据,对其进行了原矿预先脱泥—磨矿—强磁选—再磨—阳离子反浮选—阴离子正浮选工艺流程试验。结果表明:原矿预先脱泥后磨细至-0.075 mm占75%,磨矿产品与矿泥混合后经1粗1扫湿式强磁选,得到锰品位为25.23%、回收率为85.92%的强磁选精矿,强磁选精矿再磨至-0.075 mm占85.14%,以硫酸为p H调整剂、十二胺为捕收剂经1粗2扫反浮选,可以得到锰品位为28.86%、回收率为78.57%的反浮选精矿,反浮选精矿以Na2CO3为p H调整剂、六偏磷酸钠为抑制剂、GJBW为捕收剂经1粗2扫正浮选,获得的最终锰精矿锰品位为33.62%、回收率为72.76%。试验结果可以为该硅钙质锰矿石的利用提供技术参考。

Experiment Research on High Intensity Magnetic-Flotation of a Silica-Calcia Manganese

There is 21. 83% manganese in a silica-calcia low grade manganese ore from Sichuan Province. Manganese is finely disseminated in the ore and easy to be sliming. To provide basis for the development of the ore,beneficiation experiment was conducted on the ore by pre-sliming-grinding-high intensity magnetic separation-regrinding-cationic reverse flotation-anion-ic direct flotation process. Results show that ore via pre-sliming and ground to 75% passing 0. 075 mm,ground products mixed with slime and then via one roughing-one scavenging high intensity magnetic separation, high intensity magnetic concentrate with manganese grade of 25. 23% and recovery of 85. 92% was obtained, high intensity magnetic concentrate reground to 85. 14% passing 0. 074 mm,using sulfuric acid as pH regulator,dodecylamine as collector,via one roughing-two scavenging re-verse flotation, reverse flotation concentrate was obtained with manganese grade of 28. 86%, recovery of 78. 57%, using Na2CO3 as pH regulator,sodium hexametaphosphate as depressor,GJBW as collector via one roughing-two scavenging direct flotation,direct flotation concentrate with manganese grade of 33. 62%,recovery rate is 72. 76% was obtained. Test results can provide technique reference for utilization of the silica-calcia manganese.