安徽某选矿厂细碎产品干抛试验研究  

Research on Dry Polishing Test of Fine Products from a Mineral Processing Plant in Anhui Province

作　　者：邹宗彬 程传麟 胡黄毛 邓秀兰 方天然 ZOU Zongbin;CHENG Chuanlin;HU Huangmao;DENG Xiulan;FANG Tianran(Nanshan Mining Co.,Ltd.,Anhui Masteel Mining Resources Group)

机构地区：[1]安徽马钢矿业资源集团南山矿业有限公司

出　　处：《现代矿业》2024年第4期147-149,154,共4页Modern Mining

摘　　要：安徽某选厂原矿铁品位为20.65%,有害元素硫含量为3.80%,磷含量为0.21%。原矿中主要含铁矿物磁铁矿分布率为63.13%。为提高入磨料品位,降低选比和选厂运行成本,对细碎产品进行了预先抛废试验,得出细碎产品(-16 mm)干式磁选抛废最佳的工艺参数:磁场强度为278.66 kA/m,分隔板距离为22 cm,皮带线速度为2.0 m/s,该条件下可得到全铁品位为22.58%的干选精矿,尾矿产率为24.42%,尾矿中磁性铁含量为2.92%。模拟生产现场,将干选粗精矿辊压至-5 mm进行湿式粗粒磁选抛尾试验,结果表明,干选精矿经湿式磁选抛尾后,可将入磨品位提高到29.77%,入磨料品位明显提高。试验结果可为现场工艺流程改造提供技术依据。The iron grade of raw ore from a concentrator in Anhui is 20.65%,the sulfur content of harmful elements is 3.80%,and the phosphorus content is 0.21%.The distribution rate of magnetite,the main iron-bearing mineral in the raw ore,is 63.13%.It also contains a small amount of pyrite and iron carbonate.In order to improve the grade of the abrasive,reduce the selection ratio and the operation cost of the plant,the pre-discarding test was carried out on the finely crushed products of the plant.The results show that the optimal process parameters for the discarding of fine products(-16 mm)by dry magnetic separation are as follows:the magnetic field strength is 278.66 kA/m,the separation plate distance is 22 cm,and the belt line speed is 2.0 m/s.Under these conditions,the total iron grade of concentrate is 22.58%,the tailings yield is 24.42%,and the magnetic iron content in the tailings is 2.92%.By simulating the production status,the dry rough concentrate was rolled to-5 mm to carry out the tailings discarding test of wet coarse magnetic separation.The test results show that after the tailings discarding of dry concentrate by wet magnetic separation,the grinding grade can be increased to 29.77%,and the abrasive grade can be significantly improved.The test results can provide technical basis for process transformation.

关 键 词：细碎 干式磁选 预先抛废 磁场强度 

分 类 号：TD951[矿业工程—选矿]