采用微波对矿石进行加热预处理,使得矿物被更好地解离,提高了磁铁矿的磁选精矿产率和精矿品位。结果表明,当微波功率达到3 k W时,磁铁矿的磁选精矿产率由未处理原矿时的44%提高到72%;磁选电流为2.0 A时,磁选精矿产率达到最大,为60%;且...采用微波对矿石进行加热预处理,使得矿物被更好地解离,提高了磁铁矿的磁选精矿产率和精矿品位。结果表明,当微波功率达到3 k W时,磁铁矿的磁选精矿产率由未处理原矿时的44%提高到72%;磁选电流为2.0 A时,磁选精矿产率达到最大,为60%;且经过微波加热处理的矿石在磁选后,其精矿产品品位较原矿(50.2%)提高了6%~8%。展开更多
Pretreatment of high content of Si- and Al-containing cyanide tailings by water leaching to remove some impurities, such as the major impurities minerals of Si and A1, as well as its effect on Fe extraction in the wat...Pretreatment of high content of Si- and Al-containing cyanide tailings by water leaching to remove some impurities, such as the major impurities minerals of Si and A1, as well as its effect on Fe extraction in the water leaching process was investigated. The effects of different parameters on iron recovery were studied, and the reaction parameters were proposed as follows： sodium carbonate content of 30%, water leaching at 60 ~C for 5 min, liquid/solid ratio of 15：1, and exciting current of 2 A. Under these optimal conditions, magnetic concentrate containing 59.11% total iron and a total iron recovery rate of 76.12% was obtained. In addition, the microstructure and phase transformation of the process of water leaching were studied by X-ray powder diffraction technique （XRD）, Electronic image of backscattering （BEI）, X-ray fluorescence （XRF）, and energy dispersive spectrometry （EDS）. The results indicate that the soluble compound impurities generated in the roasting process are washed out, and the dissoluble substances enter into nonmagnetic materials by water leaching, realizing the effective separation of impurities and Fe.展开更多
文摘采用微波对矿石进行加热预处理,使得矿物被更好地解离,提高了磁铁矿的磁选精矿产率和精矿品位。结果表明,当微波功率达到3 k W时,磁铁矿的磁选精矿产率由未处理原矿时的44%提高到72%;磁选电流为2.0 A时,磁选精矿产率达到最大,为60%;且经过微波加热处理的矿石在磁选后,其精矿产品品位较原矿(50.2%)提高了6%~8%。
基金Projects(ZR2010EL006,Y2007F60) supported by the National Science Foundation of Shandong Province of ChinaProject(J12LA04) supported by High Education Science Technology Program of Shandong Province,China
文摘Pretreatment of high content of Si- and Al-containing cyanide tailings by water leaching to remove some impurities, such as the major impurities minerals of Si and A1, as well as its effect on Fe extraction in the water leaching process was investigated. The effects of different parameters on iron recovery were studied, and the reaction parameters were proposed as follows： sodium carbonate content of 30%, water leaching at 60 ~C for 5 min, liquid/solid ratio of 15：1, and exciting current of 2 A. Under these optimal conditions, magnetic concentrate containing 59.11% total iron and a total iron recovery rate of 76.12% was obtained. In addition, the microstructure and phase transformation of the process of water leaching were studied by X-ray powder diffraction technique （XRD）, Electronic image of backscattering （BEI）, X-ray fluorescence （XRF）, and energy dispersive spectrometry （EDS）. The results indicate that the soluble compound impurities generated in the roasting process are washed out, and the dissoluble substances enter into nonmagnetic materials by water leaching, realizing the effective separation of impurities and Fe.
