Successful recovery of limonite from iron fines was achieved by using flocculation-high intensity magnetic separation （FIMS） and adding hydrolyzed and causticized flocculants according to the characteristic of iron ...Successful recovery of limonite from iron fines was achieved by using flocculation-high intensity magnetic separation （FIMS） and adding hydrolyzed and causticized flocculants according to the characteristic of iron fines. The separation results of the three iron samples are as follows： iron grade 66.77%- 67.98% and the recovery of iron 69.26%-70.70% by the FIMS process with flocculants. The comparative results show that under the same separation conditions the F1MS process can effectively increase the recovery of iron by 10. 97%- 15.73%. The flowsheet results confirm the reliability of the process in a SHP high intensity magnetic separator. The concentrate product can he used as raw materials for direct reduction iron-smelting. The hydrolyzed and causticized flocculants can selectively flocculate fine feebly-magnetic iron mineral particles to increase their apparent separation sizes. The larger the separation size, the stronger the magnetic force. By comparing the separation results of the three samples it is found that among the three samples the higher the limonite content, the better the separation result. This means that the separation result relates closely to the flocculation process and the adding pattern of the flocculant.展开更多
毛里塔尼亚粉状(+5.0 mm 22.10%)酸性铁矿石铁品位58.65%,硫、磷含量极低,主要杂质成分为硅,铁在各粒级没有明显的富集现象。为确定该矿石的选矿工艺,进行了实验室试验和工业生产试验。结果表明,在磨矿细度-0.074 mm68.75%、强磁选磁感...毛里塔尼亚粉状(+5.0 mm 22.10%)酸性铁矿石铁品位58.65%,硫、磷含量极低,主要杂质成分为硅,铁在各粒级没有明显的富集现象。为确定该矿石的选矿工艺,进行了实验室试验和工业生产试验。结果表明,在磨矿细度-0.074 mm68.75%、强磁选磁感应强度为1.0 T的条件下,可获得铁品位64.09%、铁回收率92.18%的铁精矿;采用闭路磨矿—弱磁选—2次强磁粗选流程进行工业生产试验,可获得产率85.10%、铁品位63.54%、铁回收率92.68%的总精矿,铁品位28.68%的尾矿可作为铁质校正原料销售至周边水泥厂,实现资源的综合利用。展开更多
A new permanent magnetic separator was introduced to treat the ores with the characteristics of weak magnetic iron minerals and in a fine size range. The new machine was applied to the iron removal from potash feldspa...A new permanent magnetic separator was introduced to treat the ores with the characteristics of weak magnetic iron minerals and in a fine size range. The new machine was applied to the iron removal from potash feldspar. The effects of the magnetic field intensity, pulp density and grinding fineness on the iron removal were investigated. The optimized operation parameters were achieved and listed as follows： the -0.074 mm content is 85%, the pulp density is 45% and the magnetic field strength is 2T. A close test of middles regrinding was also carried out to improve concentrate yield. The data show that the grade of TFe（total iron） in potash feldspar product decreased from 1.31% to 0.21% and the concentrate yield reached 85.32%. All the results indicated that the traditonal high-intensity electromagnetic separators can be betterly substituted by the new permanent magnetic separator. This study may provide the theoretical evidence for iron removal from potash feldspar.展开更多
文摘Successful recovery of limonite from iron fines was achieved by using flocculation-high intensity magnetic separation （FIMS） and adding hydrolyzed and causticized flocculants according to the characteristic of iron fines. The separation results of the three iron samples are as follows： iron grade 66.77%- 67.98% and the recovery of iron 69.26%-70.70% by the FIMS process with flocculants. The comparative results show that under the same separation conditions the F1MS process can effectively increase the recovery of iron by 10. 97%- 15.73%. The flowsheet results confirm the reliability of the process in a SHP high intensity magnetic separator. The concentrate product can he used as raw materials for direct reduction iron-smelting. The hydrolyzed and causticized flocculants can selectively flocculate fine feebly-magnetic iron mineral particles to increase their apparent separation sizes. The larger the separation size, the stronger the magnetic force. By comparing the separation results of the three samples it is found that among the three samples the higher the limonite content, the better the separation result. This means that the separation result relates closely to the flocculation process and the adding pattern of the flocculant.
文摘毛里塔尼亚粉状(+5.0 mm 22.10%)酸性铁矿石铁品位58.65%,硫、磷含量极低,主要杂质成分为硅,铁在各粒级没有明显的富集现象。为确定该矿石的选矿工艺,进行了实验室试验和工业生产试验。结果表明,在磨矿细度-0.074 mm68.75%、强磁选磁感应强度为1.0 T的条件下,可获得铁品位64.09%、铁回收率92.18%的铁精矿;采用闭路磨矿—弱磁选—2次强磁粗选流程进行工业生产试验,可获得产率85.10%、铁品位63.54%、铁回收率92.68%的总精矿,铁品位28.68%的尾矿可作为铁质校正原料销售至周边水泥厂,实现资源的综合利用。
基金Funded by the National High-tech R&D Program of China(No.2007AA06Z123)the Hubei Provincial Key Laboratory of Pollutant Analysis and Recycling Project(KY2010G19)the Independent Innovation Research Fund of Wuhan University of Technology(2010-YB-16)
文摘A new permanent magnetic separator was introduced to treat the ores with the characteristics of weak magnetic iron minerals and in a fine size range. The new machine was applied to the iron removal from potash feldspar. The effects of the magnetic field intensity, pulp density and grinding fineness on the iron removal were investigated. The optimized operation parameters were achieved and listed as follows： the -0.074 mm content is 85%, the pulp density is 45% and the magnetic field strength is 2T. A close test of middles regrinding was also carried out to improve concentrate yield. The data show that the grade of TFe（total iron） in potash feldspar product decreased from 1.31% to 0.21% and the concentrate yield reached 85.32%. All the results indicated that the traditonal high-intensity electromagnetic separators can be betterly substituted by the new permanent magnetic separator. This study may provide the theoretical evidence for iron removal from potash feldspar.
