立式螺旋搅拌磨在云南某铁精矿再磨中的应用  

Application of Vertical Screw Agitating Mill on Regrinding of One Iron Concentrate in Yunnan

作　　者：李娜 郭芸杉 骆忠 蒋太国 朱有军 朱艳芬 LI Na;GUO Yunshan;LUO Zhong;JIANG Taiguo;ZHU Youjun;ZHU Yanfen(Yuxi Mining Industry Co.,Ltd.,Yuxi,Yunnan 653405,China;Mining Research Institute of Yunnan Copper Co.,Ltd.,Kunming,Yunnan 650000,China)

机构地区：[1]玉溪矿业有限公司,云南玉溪653405 [2]云南铜业股份有限责任公司矿山研究院,云南昆明650000

出　　处：《云南冶金》2024年第3期78-83,共6页Yunnan Metallurgy

摘　　要：针对云南某选厂铁精矿,开展MLA测试和铁精矿再磨再选工艺试验研究。开展立式螺旋搅拌磨磨矿介质对比试验和修正的Levin试验确定最佳磨矿介质,表明1000 gФ8 mm的钢球磨矿效果最好,将物料磨至-38μm占90%时吨功耗为4.61 kW·h/t,比1500 g Bond标准球低7.27 kW·h/t。使用立式螺旋搅拌磨开展流程改造闭路试验,对比流程改造前后指标变化情况,结果表明改造后铁精矿细度达到了-38μm目占90%,相比于改造前上升了6.6个百分点,铁精矿品位上升至66.06%,相比于改造前上升了3.05个百分点,每年可增加1518.70万元的经济效益。MLA tests and regrinding and recleaning process experimental studies of iron concentrate were developed according to the iron concentrate of one dressing plant in Yunnan.MLA test results show,the single separation degree is low,it has big ore grinding optimization space.The comparison tests between vertical screw agitating mill regrinding media and correctional Levin test were carried out to confirm the best ore grinding media,the results of the tests show that 1000 gΦ8 mm steel ball has the best ore grinding results when the materials were ground to-38μm,accounting for 90%,its power consumption per ton is 4.61 kW.h.t-1,it 7.27 kW.h.t-1 lower than 1500 g Bond standard ball.The vertical screw agitating mill was adopted for the development of process transformation closed circuit test,according to the indicators variation before and after process transformation,the results show,that when the transformation finished,the fineness of iron concentrate reached-38μm,accounting for 90%,compared to data before transformation,it is increased by 6.6%,the grade of iron concentrate increased by 66.06%,compared to the data before transformation,it is increased by 3.05%,then the economic benefits can be increased by￥15.187 million yuan per year.

关 键 词：铁精矿 立式螺旋搅拌磨 Bond功指数 单体解离度 再磨再选 磨矿介质 

分 类 号：TD451[矿业工程—矿山机电]