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| 1 | 表面溶解对从不同脉石矿物中浮选分离钛铁矿的动力学参数的影响(英文)显示文摘研究表面酸溶解对钛铁矿(IL)及其常见伴生脉石矿物(包括橄榄石-辉石(Ol-Px)、透闪石-斜绿泥石(Tr-Cch)和石英)浮选动力学的影响。结果表明,通过表面溶解,钛铁矿的吸附速率常数从5.272增大到8.441 mol/(g·min),而Ol-Px、Tr-Cch和石英的吸附速率常数分别从6.332、7.309和7.774mol/(g·min)减小为5.034、6.223和7.371mol/(g·min)。二元混合矿物的浮选实验结果表明,经表面溶解后,从Ol-Px、Tr-Cch和石英中浮选钛铁矿的修正速率常数值分别从36.15、36.52和47.86min^-1增大到41.72、45.78和56.24min^-1,导致从脉石矿物中分离预处理过的钛铁矿过程的动力学选择性指数(SI)增大。ICP-MS分析证实,脉石矿物动力学参数的降低可能是由于其表面Fe^2+、Ca^2+和Mg^2+的去除,导致矿物表面缺乏足够的活性位点与捕集剂组分发生作用。接触角测量结果证实,表面溶解可防止矿物表面形成稳定的疏水层,从而可在矿物和气泡之间发生稳定的附着。一般来说,钛铁矿浮选动力学参数的提高与伴生脉石矿物中的铁含量呈负相关关系。 | Omid SALMANI NURI Mehdi IRANNAJAD Akbar MEHDILO | 2019 | Transactions of Nonferrous Metals Society of China2019，29，12： | 10 |
| 2 | 碳酸钠和氯化钙对软锰矿阳离子浮选中方解石的抑制作用(英文)显示文摘在软锰矿阳离子浮选中添加十二胺,采用浮选实验、红外光谱分析、接触角测量和zeta电位测试等手段研究碳酸钠和氯化钙对方解石矿物的抑制作用。微浮选实验结果表明,这两种抑制剂都能明显地抑制方解石的浮选。而且,碳酸钠作为活化剂,能增加软锰矿的浮选性能。浮选实验和接触角测试结果表明,碳酸钠对方解石的选择性抑制作用要比氯化钙强。Zeta电位和红外光谱分析表明,碳酸钠减少了方解石矿物表面所带的负电荷,从而减少了十二胺在其表面的静电吸附。在pH=7.5,添加2000 g/t十二胺和1500 g/t碳酸钠的浮选条件下,可得到含40%MnO的软锰矿精矿,回收率达71.5%。 | Shima RAHIMI Mehdi IRANNAJAD Akbar MEHDILO | 2017 | Transactions of Nonferrous Metals Society of China2017，27，8： | 2 |
| 3 | 加热预处理对钛铁矿及其伴生脉石矿物的表面改性:在浮选过程中的应用显示文摘通过浮选实验(微量浮选和实验室浮选槽)、XRD、XPS和FT-IR分析以及Zeta电位和接触角测量,研究常规加热预处理对钛铁矿及其伴生脉石矿物表面性质的影响。在600℃、25 min的最佳条件下进行预处理,pH为6.3时钛铁矿的可浮性由73.5%提高到91%。XRD和XPS分析表明,在此预处理条件下,钛铁矿的Fe^(3+)含量提高约16.5%,而没有出现任何相分解和结构变化。FT-IR分析以及接触角和Zeta电位测量结果证明,钛铁矿可浮性的提高是由于捕收剂吸附作用的增强和较难溶的油酸铁疏水层的形成。矿石浮选实验表明,加热预处理使TiO2回收率由65.4%提高到73.7%,而钛铁矿精矿的TiO2含量没有明显变化。 | Akbar MEHDILO Mehdi IRANNAJAD | 2021 | Transactions of Nonferrous Metals Society of China2021，31，9： | 1 |
| 4 | Effect of microwave pretreatment on grinding and flotation kinetics of copper complex ore显示文摘The present study initially investigates the kinetics of microwave-assisted grinding and flotation in a porphyry copper deposit.Kinetic tests were conducted on untreated and microwave-irradiated samples by varying the exposure time from 15 to 150 s.Optical microscopy,energy-dispersive X-ray spectroscopy,and scanning electron microscopy were conducted to determine the mineral liberation and particle surface properties,and to perform mineralogical analyses.Results showed that the ore breakage rate constant monotonically increased by increasing the exposure time,particularly for the coarsest fraction size(400μm)due to the creation of thermal stress fractures alongside grain boundaries.Excessive irradiation time(>60 s)led to the creation of oxidized and porous surfaces along with a dramatic change in particle morphologies that result in a substantial reduction of chalcopyrite and pyrite flotation rate constants and ultimate recoveries.We concluded that MW-pretreated copper ore was ground faster than the untreated variety,but the two types have slightly similar floatabilities. | Hamed Gholami Bahram Rezai Ahmad Hassanzadeh Akbar Mehdilo Mohammadreza Yarahmadi | 2021 | International Journal of Minerals,Metallurgy and Materials2021，28，12： | 1 |
| 5 | Applied Mineralogical Studies on Iranian Titanium Deposits显示文摘Qara-aghaj and Skandian as hard rock titanium deposit and Kahnooj one as a placer deposit were investigated from applied mineralogical point of view. The mineralogical studies were carried out using XRD, XRF, optical microscopy, scanning electron microscopy and microprobe analysis. These studies indicated that ilmenite and magnetite are main valuable minerals in the studied ores. Pyroxene, olivine and plagioclase are the main gangue minerals in Qara-aghaj ore while chlorite and plagioclase are the major gangue minerals in Skandian ore. Plagioclase, clinopyroxene, amphibole, feldspate and some quartz are the important gangue minerals in kahnooj deposit. In all three ores ilmenite is mainly in the form of ilmenite grains but some lamellae of ilmenite with thickness between 0.1 to 20 μm have been occurred as exsolution textures inside magnetite grains, where the magnetite here can be referred to as ilmenomagnetite. In the hard rock ores some fine ilmenites have been disseminated in silicate minerals. The liberation degree of granular ilmenite was determined 150, 140 and 200 μm for Qara-aghaj, Skandian and Kahnooj, respectively. So, only the granular form of ilmenite is recoverable by physical methods. Some sphene and rutile as titanium containing minerals were observed mainly inside ilmenite phase in kahnooj ore. Some fine rutile was also found inside Skandian ilmenite while there were not any other titanium minerals inside Qara-aghaj ilmenite. Apatite is another valuable mineral which was found only in Qara-aghaj ore. Using SEM and microprobe analysis it was found that there are different amounts of exsolved fine lamellae of hematite inside ilmenite in Qara-aghaj and Kahnooj ores while it was not observed in Sckandian one. The average contents of TiO2 in the lattice of Qara-aghaj, Skandian and Kahnooj ilmenite were determined 51.13, 50.9% and 52.02%, respectively. FeO content of ilmenite lattice for all three samples is clearly lower than the theoretical content. This is due to the substitution of Mg and Mn for some Fe2+ ions in the ilmenite lattice. V2O3 content of magnetite lattice is up to 1%. So, magnetite can be a suitable source for production of vanadium as a by-product in all three deposits. | Akbar Mehdilo Mehdi Irannajad Bahram Rezai | 2013 | 矿物学报2013，33，S1： | 0 |
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