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迄今为止,中国已经在20多个非洲国家开展了地质钻探方面的工作,近年来,我国已经在纳米比亚、加纳、马里等十几个国家开展了找矿活动。现在需要进一步扩大合作范围,以便在矿业资源开发的合作中开辟新的领域。针对矿石性质,采用湿式弱磁选—尾矿再磨—强磁选联合工艺流程进行选别。在原矿磨至-200目占60%,磁场强度92KA/m条件下经一段湿式弱磁选获得铁精矿1;弱磁选尾矿再磨至-200目占90%,磁场强度800KA/m条件下经一段强磁选获得铁精矿2;精矿1和精矿2合并得到TFe品位为60.89%、回收率82.88%,mFe品位41.48%、回收率99.31%的铁精矿产品。
So far, China has conducted geological drilling work in more than 20 African countries. In recent years, China has conducted prospecting activities in over a dozen countries such as Namibia, Ghana and Mali. Now we need to further expand the scope of cooperation in order to open up new areas of cooperation in mining resources development. For the nature of the ore, the use of wet weak magnetic separation - tailings regrinding - strong magnetic separation combined with the selection process. Iron ore concentrate 1 was obtained through a wet weak magnetic separation at a magnetic field strength of 92KA / m from ore mill to -200 mesh, magnetic field intensity was 800KA / m Iron concentrate 2 was obtained by a strong magnetic separation. Concentrate 1 and concentrate 2 were combined to obtain an iron concentrate product with TFe grade of 60.89%, recovery rate of 82.88%, mFe grade of 41.48% and recovery rate of 99.31%.