中国矿业
中國礦業
중국광업
China Mining Magazine
2015年
11期
135-138
,共4页
高鹏%李国峰%周惠文%李艳军%韩跃新%李朝朋
高鵬%李國峰%週惠文%李豔軍%韓躍新%李朝朋
고붕%리국봉%주혜문%리염군%한약신%리조붕
磁铁矿%磁脉冲%磨矿效率%高效分选
磁鐵礦%磁脈遲%磨礦效率%高效分選
자철광%자맥충%마광효솔%고효분선
magnetite ore%magnetic pulse%grinding efficiency%high efficiency separation
对大孤山磁铁矿石进行了磁脉冲预处理,使矿石内部沿不同矿物界面生成扩展裂纹和裂缝,进而提高磁铁矿的磨矿效率和分选指标。结果表明,在磁脉冲预处理磁场强度为39.81kA/m时,预处理后磨矿产品中-0.074mm含量提高0.25%~2.4%。在适宜的磨矿‐磁选条件下,预处理后精矿的 T Fe品位提高0.41%~2.43%,铁回收率提高0.55%~1.81%。借助扫描电子显微镜和生物显微镜等检测手段,对预处理前后矿样的微观结构及磨矿产品的单体解离度进行分析,探讨了磁脉冲预处理提高铁矿石磨矿效率和分选指标的机理。
對大孤山磁鐵礦石進行瞭磁脈遲預處理,使礦石內部沿不同礦物界麵生成擴展裂紋和裂縫,進而提高磁鐵礦的磨礦效率和分選指標。結果錶明,在磁脈遲預處理磁場彊度為39.81kA/m時,預處理後磨礦產品中-0.074mm含量提高0.25%~2.4%。在適宜的磨礦‐磁選條件下,預處理後精礦的 T Fe品位提高0.41%~2.43%,鐵迴收率提高0.55%~1.81%。藉助掃描電子顯微鏡和生物顯微鏡等檢測手段,對預處理前後礦樣的微觀結構及磨礦產品的單體解離度進行分析,探討瞭磁脈遲預處理提高鐵礦石磨礦效率和分選指標的機理。
대대고산자철광석진행료자맥충예처리,사광석내부연불동광물계면생성확전렬문화렬봉,진이제고자철광적마광효솔화분선지표。결과표명,재자맥충예처리자장강도위39.81kA/m시,예처리후마광산품중-0.074mm함량제고0.25%~2.4%。재괄의적마광‐자선조건하,예처리후정광적 T Fe품위제고0.41%~2.43%,철회수솔제고0.55%~1.81%。차조소묘전자현미경화생물현미경등검측수단,대예처리전후광양적미관결구급마광산품적단체해리도진행분석,탐토료자맥충예처리제고철광석마광효솔화분선지표적궤리。
Magnetite ore from Dagushan was pretreated by magnetic pulse .The cracks and fissures within the ore were generated at the interface of different minerals ,which improved the grinding efficiency and separation index of the magnetite .The testing results showed that the content of -0 .074 mm in the ground product increased 0 .25% ~2 .4% after preprocessing by magnetic pulse with the magnetic intensity of 39 .81kA/m .The grade of iron concentrate increased 0 .41% ~2 .43% and the recovery increased 0 .55%~1 .81% after pretreatment under appropriate condition of grinding‐magnetic separation .Furthermore ,the microstructure of raw materials and the liberation degree of the grinding products before or after pretreatment were investigated by means of biological microscope and the scanning electron microscope , respectively .The function mechanism of magnetic pulse pretreatment improving the grinding efficiency and separation index of iron ore was explained .