干式预选技术在低品位磁铁矿选矿中的应用  

Application of dry preseparation technology in benefication of low grade magnetite

作　　者：杨少燕[1] 米夏夏 程永维 何荣权[1] 姜永丰 YANG Shao-yan;MI Xia-xia;CHENG Yong-wei;HE Rong-quan;JIANG Yong-feng(China ENFI Engineering Co.Ltd.,Beijing 100038,China;General Research Institute of Mining&Metallurgy(BGRIMM)Technology Group,Beijing 100160,China;University of Science and Technology Beijing School of Civil and Resource Engineering,Beijing 100083,China;Waitoushan Iron Mine of Benxi Iron and Steel Group Co.Ltd.,Benxi 117006,Liaoning,China)

机构地区：[1]中国恩菲工程技术有限公司,北京100038 [2]矿冶科技集团有限公司,北京100160 [3]北京科技大学土木与资源工程学院,北京100083 [4]本钢集团有限公司歪头山铁矿,辽宁本溪117006

出　　处：《矿冶》2022年第6期60-63,86,共5页Mining And Metallurgy

摘　　要：干式预选技术可充分体现“能丢早丢、多碎少磨”的节能理念,是低品位磁铁矿进入磨选作业前实现节能降耗的一个必要措施。针对本钢集团歪头山铁矿采场矿石、排土场回收矿石的混合矿,采用新型节能干式预选技术进行干选抛废。实验室在原矿TFe品位27%左右、磁性铁占有率78%~83%的条件下,两段干选总抛废率可达42%以上,废石mFe品位低于1%;工业生产在原矿TFe品位20%~22%、磁性铁占有率60%~62%的条件下,两段干选总抛废率为40%~43%,废石mFe品位低于1%,单位原矿CO_(2)排放量降幅达21.43%,节能减碳效果显著。Dry preseparation technology can fully reflect the energy-saving concept of“early discarding,more crushing and less grinding”,which is a necessary measure to save energy and reduce consumption before low grade magnetite enters the grinding and separation operation.Aiming at the mixed ore from the pit and dump of Waitoushan Iron Mine of Benxi Iron and Steel Group Co.Ltd.,a new energy-saving dry preseparation technology was adopted for dry separation and waste disposal.Under the conditions of raw ore TFe grade of 27%and magnetic iron ratio of 78%-83%,two stages of dry preseparation were adopted in the laboratory and more than 42% of the waste rock could be discarded with the waste rock mFe grade lower than 1%.Under the condition of TFe grade of raw ore of 20%—22% and magnetic iron ratio of 60%—62%in the industrial production,40%—43% of the waste rock could be discarded with the waste rock mFe grade lower than 1%,and the CO_(2) emission per unit of raw ore was reduced by 21.43%.The effect of energy saving and carbon reduction is remarkable.

关 键 词：节能 低品位磁铁矿 干式预选 高压辊 强化干式筛分 

分 类 号：TD951[矿业工程—选矿]