国外某铜金硫化矿石氧化程度较低,铜、金是主要有价金属,铜矿物主要为黄铜矿,金矿物主要为裸露金,金与铜矿物共伴生关系密切,以裂隙和粒间金的形式存在于黄铜矿中。为高效回收矿石中的铜、金矿物进行了浮选试验。结果表明,矿石在磨矿细...国外某铜金硫化矿石氧化程度较低,铜、金是主要有价金属,铜矿物主要为黄铜矿,金矿物主要为裸露金,金与铜矿物共伴生关系密切,以裂隙和粒间金的形式存在于黄铜矿中。为高效回收矿石中的铜、金矿物进行了浮选试验。结果表明,矿石在磨矿细度为-0.074 mm80%条件下,以石灰为pH调整剂、BK916G为捕收剂、BK204为起泡剂,采用2粗2扫工艺流程混浮铜金,铜金混合粗精矿再磨至-0.038 mm 80%后进行3段精选,最终得到Cu品位23.50%、Cu回收率90.46%、Au品位17.91 g/t、Au回收率76.96%的铜金混合精矿。实现了铜、金的高效回收。展开更多
The effects of Ti-and Mg-bearing minerals on the crystal structure,morphology,particle size distribution,and formation mechanism of efficient desilication product of hydroandradite(HA)during hydrothermal conversion in...The effects of Ti-and Mg-bearing minerals on the crystal structure,morphology,particle size distribution,and formation mechanism of efficient desilication product of hydroandradite(HA)during hydrothermal conversion in a synthetic sodium aluminate solution were investigated via X-ray diffractometer,scanning electron microscope and particle size analyzer.During HA formation,anatase,rutile,and periclase dissolved in sodium aluminate solution engage in ion substitution reactions between Ti4+and Si4+,and between Mg^(2+)and Ca^(2+),respectively.However,dissolved hydromagnesite cannot enter into the HA.The content of HA after the hydrothermal reactions changes slightly with the increase of anatase and periclase contents,but it notably decreases with increased quantities of rutile and hydromagnesite.Ti-bearing minerals reduce the particle size and enhance the specific surface area of HA,whereas Mg-bearing minerals exert the opposite effect.The morphology of HA with Ti-and Mg-bearing minerals changes from spherical particles to flocculent structure and hexagonal plate-like particles.展开更多
The population of surface broken bonds of some typical sulfide, oxide and salt-type minerals which may belong to cubic, tetragonal, hexagonal, or orthorhombic system, were calculated. In terms of the calculation resul...The population of surface broken bonds of some typical sulfide, oxide and salt-type minerals which may belong to cubic, tetragonal, hexagonal, or orthorhombic system, were calculated. In terms of the calculation results, the cleavage natures of these minerals were analyzed, and the relationship between surface broken bonds density and surface energy was also established. The results show that the surface broken bonds properties could be used to predict the cleavage nature of most of minerals, and the predicted cleavage planes agree well with those reported in previous literature. Moreover, this work explored a rule that, surface broken bonds density is directly related to surface energy with determination coefficient（R2） of over 0.8, indicating that the former is a dominant factor to determine the latter. Therefore, anisotropic surface broken bonds density can be used to predict the stability of mineral surface and the reactivity of surface atoms.展开更多
文摘国外某铜金硫化矿石氧化程度较低,铜、金是主要有价金属,铜矿物主要为黄铜矿,金矿物主要为裸露金,金与铜矿物共伴生关系密切,以裂隙和粒间金的形式存在于黄铜矿中。为高效回收矿石中的铜、金矿物进行了浮选试验。结果表明,矿石在磨矿细度为-0.074 mm80%条件下,以石灰为pH调整剂、BK916G为捕收剂、BK204为起泡剂,采用2粗2扫工艺流程混浮铜金,铜金混合粗精矿再磨至-0.038 mm 80%后进行3段精选,最终得到Cu品位23.50%、Cu回收率90.46%、Au品位17.91 g/t、Au回收率76.96%的铜金混合精矿。实现了铜、金的高效回收。
基金financial supports from the National Key R&D Program of China (No.2022YFC2904401)the National Natural Science Foundation of China (Nos.22078055,51774079)the Fundamental Research Funds for the Central Universities,China (No.N2225002)。
文摘The effects of Ti-and Mg-bearing minerals on the crystal structure,morphology,particle size distribution,and formation mechanism of efficient desilication product of hydroandradite(HA)during hydrothermal conversion in a synthetic sodium aluminate solution were investigated via X-ray diffractometer,scanning electron microscope and particle size analyzer.During HA formation,anatase,rutile,and periclase dissolved in sodium aluminate solution engage in ion substitution reactions between Ti4+and Si4+,and between Mg^(2+)and Ca^(2+),respectively.However,dissolved hydromagnesite cannot enter into the HA.The content of HA after the hydrothermal reactions changes slightly with the increase of anatase and periclase contents,but it notably decreases with increased quantities of rutile and hydromagnesite.Ti-bearing minerals reduce the particle size and enhance the specific surface area of HA,whereas Mg-bearing minerals exert the opposite effect.The morphology of HA with Ti-and Mg-bearing minerals changes from spherical particles to flocculent structure and hexagonal plate-like particles.
基金Project(50831006)supported by the National Natural Science Foundation of ChinaProject(2012BAB10B05)supported by the National Key Technologies R&D Program of China
文摘The population of surface broken bonds of some typical sulfide, oxide and salt-type minerals which may belong to cubic, tetragonal, hexagonal, or orthorhombic system, were calculated. In terms of the calculation results, the cleavage natures of these minerals were analyzed, and the relationship between surface broken bonds density and surface energy was also established. The results show that the surface broken bonds properties could be used to predict the cleavage nature of most of minerals, and the predicted cleavage planes agree well with those reported in previous literature. Moreover, this work explored a rule that, surface broken bonds density is directly related to surface energy with determination coefficient（R2） of over 0.8, indicating that the former is a dominant factor to determine the latter. Therefore, anisotropic surface broken bonds density can be used to predict the stability of mineral surface and the reactivity of surface atoms.
