大颗粒立环脉动高梯度磁选机的研制与工业应用  

Development and Industrial Application of Coarse Particle Vertical Ring High Gradient Magnetic Separator

作　　者：李泽萍 饶宇欢 解志锋 丁利 万鹏 熊大和 曾招科 LI Zeping;RAO Yuhuan;XIE Zhifeng;DING Li;WAN Peng;XIONG Dahe;ZENG Zhaoke(SLon Magnetic Separator Ltd.,Ganzhou 341000,China)

机构地区：[1]赣州金环磁选设备有限公司,江西赣州341000

出　　处：《金属矿山》2021年第7期193-197,共5页Metal Mine

摘　　要：传统立环脉动高梯度磁选机仅用于处理微细粒级矿物,为适应实际生产需求,开发研制了大颗粒立环脉动高梯度磁选机,实现了对2~5 mm大颗粒物料的直接分选,并使强磁选设备可应用于弱磁性物料的预先抛尾,大大降低了后续作业的生产负荷。针对安徽周油坊铁矿矿石性质,两台SLon-3500大颗粒立环脉动高梯度磁选机在其工艺改造中得到了成功应用,在给料粒度为-4 mm,2次粗选磁感应场强度分别为0.7 T、1.0 T,棒介质直径尺寸为5 mm的条件下,获得了良好的抛废指标;同时,预先分拣产生的大量废石售至建筑用砂行业,经济、社会及环境效益可观。将大颗粒立环脉动高梯度磁选机应用于印度某高品质赤铁矿选厂,在给料粒度为-5 mm,2次选别磁感应强度分别为0.8 T、1.1 T,棒介质直径尺寸为6 mm的条件下,获得了TFe品位62.11%、TFe回收率96.37%的综合粗精矿,指标良好。Traditional vertical ring high gradient magnetic separator(VPHGMS)is used only for processing of fine grained minerals.In order to adapt to the actual production needs,coarse particle VPHGMS was developed for direct separation of coarse particle and the equipment was applied for pre-discarding of the tailings,which greatly reduces the production loading for the following operation.Aiming at the ore properties of Zhouyoufang Iron Mine in Anhui Province,two SLon-3500 coarse particle VPHGMS have been successfully applied in the technological transformation.Under the conditions of the feeding particle size of-4 mm,the magnetic induction intensity of twice roughing separation of 0.7 and 1.0 T respectively and the diameter of rod medium of 5 mm,a good discarding indexes has been obtained.At the same time,a large amount of waste rock generated by pre-discarding is sold to the construction sand industry,which created considerable economic,social and environmental benefits.A coarse concentrate with a TFe grade of 62.11%and a TFe recovery rate of 96.37%was obtained by applying a coarse particle VPHGMS to a high quality hematite concentrator in India under the conditions of feeding particle size of-5 mm,the magnetic induction intensity of twice roughing separation of 0.8 and 1.1 T respectively and rod medium diameter of 6 mm,indicating the better indexes.

关 键 词：大颗粒立环脉动高梯度磁选机 铁矿 预先抛尾 选矿效率 

分 类 号：TD457[矿业工程—矿山机电]