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Removing aluminum from a low-concentration lixivium of weathered crust elution-deposited rare earth ore with neutralizing hydrolysis

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Rare Metals 2017年第8期36卷 685-690页

作者： xian-ping luo Li-ping Zou Pei-Long Ma Cai-Gui luo Jing Xu Xue-Kun Tang Faculty of Resource and Environmental Engineering JiangxiUniversity of Science and TechnologyGanzhou 341000China Jiangxi Key Laboratory of Mining and Metallurgy Environmental Pollution Control Gauzhou 341000China Key Laboratory of Southern Ionic-Type Rare Earth Resources Development and Application Ministry of EducationGanzhou 341000China Faculty of Engineering University of AlbertaEdmontonAB T6G2V4Canada

Aluminum,the main impurity in the lixivium of weathered crust elution deposited rare earth ore,not only results in an increasing consumption of precipitant in the rare earth precipitation process,but also lowers the purity of final rare earth *** in the weathered crust elution-deposited rare earth ore lixivium should be *** hydrolysis method was employed to remove aluminum from the *** was found to be the optimum pH regulator for the removal of aluminum in the low *** used to adjust the pH value of the lixivium to 5.0,aluminum in the lixivium can be effectively removed in the form of aluminum hydroxide precipitation with removal rate of 97.60%.It shows that hexamethylenetetramine has a good effect on the removing of aluminum ions from the lowconcentration ***,hexamethylenetetramine in removing aluminum from lixivium has little adverse effect on the RE precipitation process.

关键词： Weathered crust elution-deposited rare earth ore Lixivium, Aluminum removing Hexamethylenetetramine

Kinetics of the electrochemical process of galena electrodes in the diethyldithiocarbamate solution

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International Journal of Minerals,Metallurgy and Materials 2010年第6期17卷 669-674页

作者： Li-li Cheng Ti-chang Sun xian-ping luo Dian-zuo Wang School of Civil and Environmental Engineering University of Science and Technology Beijing Beijing 100083 China School of Resources and Environmental Engineering Jiangxi University of Science and Technology Ganzhou 341000 China Chinese Academy of Engineering Beijing 100038 China

The electrochemical process of galena in a pH 12.8 buffer solution was investigated using chronoamperometry and chronopotentiometry. To establish kinetic parameters on the surface of galena in the diethyldithiocarbamate solution, the exchange current density and the dependence of current density on reaction time were determined. Experimental results demonstrate that the exchange current density of galena is 1.585× 10^-2A/m2 in the diethyldithiocarbamate-free solution. In the diethyldithiocarbamate solution, the thickness of lead diethyldi- thiocarbamate adsorbed on the surface of galena is 3.28 molecular layers, the diffusion coefficient of diethyldithiocarbamate on the surface of galena electrodes is 1.13 × 10^-10 m2/s, and the exchange current density of galena is 0.45 A/m2. Lead diethyldithiocarbamate on the surface of galena is firmly adsorbed.

关键词： galena electrochemistry flotation kinetics

Flotation separation of spodumene and albite with activation of calcium ion hydrolysate components

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Rare Metals 2022年第11期41卷 3919-3931页

作者： xian-ping luo Yong-Bing Zhang He-Peng Zhou Fan-Xin Xie Zhi-Zhao Yang Bo-Yuan Zhang Cai-Gui luo Engineering Research Center for High-Efficiency Development and Application Technology of Tungsten Resources(Jiangxi University of Science and Technology) Ministry of EducationGanzhou341000China Jiangxi Province Key Laboratory of Mining and Metallurgy Environmental Pollution Control Jiangxi University of Science and TechnologyGanzhou341000China

It is difficult to separate spodumene and albite by flotation with calcium ion as *** this study,microflotation experiment,solution chemistry calculation,density functional theory(DFT)calculation and X-ray photoelectron spectroscopy(XPS)analysis were conducted to investigate the effect mechanism of c alcium hydrolysate on the flotation separation of spodumene and *** show that the weak interaction intensity of Ca^(2+)with O atoms on the mineral surface makes it difficult to activate minerals *** O atom in the hydroxyl group of Ca(OH)^(+)and Ca(OH)_(2)can be strongly bonded with Al atom on the mineral surface,which greatly improves the adsorption *** the activation of Ca(OH)^(+),the adsorption forms of collectors on the surface of spodumene and albite are quite different,and the adsorption intensity on the surface of spodumene is higher,which is conducive to the flotation separation of spodumene and *** the action of Ca(OH)_(2),the adsorption of the collector on the albite surface is stronger than that of spodumene,which is not conducive to the flotation separation of the two *** adjusting the initial concentration of calcium ions and pulp pH,Ca(OH)^(+)is the main active component,which is the key to improve the separation effect of spodumene and albite.

关键词： Spodumene Albite Calcium ions Hydrolysate components Flotation Separation

Effectively enhancing recovery of fine spodumene via aggregation flotation

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Rare Metals 2020年第3期39卷 316-326页

作者： He-Peng Zhou Jie Hu Yong-Bing Zhang Yi-Jun Cao xian-ping luo Xue-Kun Tang School of Chemical Engineering and Technology China University of Mining and TechnologyXuzhou221116China Faculty of Resource and Environmental Engineering Jiangxi University of Science and TechnologyGanzhou341000China Chinese National Engineering Research Center of Coal Preparation and Purification China University of Mining and TechnologyXuzhou221116China Henan Province Industrial Technology Research Institute of Resources and Materials Zhengzhou UniversityZhengzhou450001China Western Mining Co. Ltd.Xining810006China

The effects of shear strength on aggregation flotation processes for fine spodumene(particle size less than 19μm)were investigated in this *** oleate was used as a surfactant and *** shear strength was controlled by varying the agitation speed of a selfmade stirring *** aggregation process was studied by measuring the continuous transformations in the size distribution and shape of *** results showed that as the shear strength increased,the distribution of fine spodumene transformed from bimodal to unimodal *** flocs tended to bridge more branches with a high shear strength and form globule-like flocs with very high *** parameter"aggregation degree"was introduced to evaluate the aggregation process as a function of shear *** flotation rate of flocs formed with different shear strengths was also *** results demonstrated that the flotation rate was closely related to shear strength and that there was a close correlation between this and aggregation *** results could be used to guide the actual production of fine particles via shear aggregation flotation.

关键词： Shear strength Fine spodumene Flotation rate Shear aggregation Sodium oleate

Flotation separation of feldspar from quartz using sodium fluosilicate as a selective depressant

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Rare Metals 2024年第3期43卷 1288-1300页

作者： Xin Hu xian-ping luo Zi-Shuai Liu Yong-Bing Zhang He-Peng Zhou Zhi-Zhao Yang Xue-Kun Tang Faculty of Resource and Environmental Engineering Jiangxi University of Science and TechnologyGanzhou341000China Yichun Lithium New Energy Industry Research Institute Jiangxi University of Science and TechnologyYichun336000China

The physical and chemical properties of feldspar and quartz are highly similar,thus they cannot be easily separated *** this work,the flotation separation of feldspar from quartz using sodium fluosilicate(Na_(2)SiF_(6);SF)as a selective depressant was ***,the influence mechanism of SF on the selective flotation separation of feldspar and quartz was investigated via flotation tests,chemical analysis of flotation solution,Fourier transform infrared spectroscopy(FTIR),X-ray photoelectron spectroscopy(XPS)and contact angle *** results of the flotation tests show that feld spar and quartz without SF treatment have good *** SF treatment,feldspar still has good floatability,whereas quartz has significantly reduced *** solution chemical analysis shows that the functional group plays an important role in depressing the quartz is[SiF_(6)]^(2-).FTIR,XPS and contact angle analysis results show that[SiF_(6)]^(2-)is adsorbed only on the surface of ***,a thin hydrophilic SiOF layer is generated on the surface,which interferes with the adsorption of the collector on the surface of the *** phenomenon leads to a significant reduction in quartz's ***,SF has a good ability to separate feldspar from quartz by flotation.

关键词： Flotation separation Depressants Sodium fluorosilicate Quartz Feldspar

三维空间中带非线性阻尼项的等熵欧拉方程组轴对称解的爆破

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数学的实践与认识 2017年第5期47卷 260-266页

作者：熊显萍罗朝辉贵州省兴义民族师范学院数学科学学院贵州兴义562400

研究了三维空间中带非线性阻尼项的可压缩等熵欧拉方程组Dirichlet初边值问题.采用泛函方法,定义几种不同的泛函,当初始速度足够大时分别得到了经典解在某一时间内必定爆破的结论.由于出现了非线性阻尼项,较之线性阻尼的情形,经典解爆... 详细信息

研究了三维空间中带非线性阻尼项的可压缩等熵欧拉方程组Dirichlet初边值问题.采用泛函方法,定义几种不同的泛函,当初始速度足够大时分别得到了经典解在某一时间内必定爆破的结论.由于出现了非线性阻尼项,较之线性阻尼的情形,经典解爆破的难度随之增加.

关键词：非线性阻尼项等熵欧拉方程组轴对称爆破

人工智能文生视频大模型Sora对科技伦理的冲击及应对

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新疆师范大学学报（哲学社会科学版） 2025年第1期46卷 142-148页

作者：曹贤平南昌工程学院马克思主义学院江西南昌330099

Sora的推出是人类社会发展和人工智能进步的标志性事件,凸显出生成式人工智能的强大功能。Sora的爆火离不开规模化数据、先进算法和规模化算力,其内在运行机制紧扣文本输入、文本编码、视频生成和视频输出的基本逻辑,在人类社会具有广... 详细信息

Sora的推出是人类社会发展和人工智能进步的标志性事件,凸显出生成式人工智能的强大功能。Sora的爆火离不开规模化数据、先进算法和规模化算力,其内在运行机制紧扣文本输入、文本编码、视频生成和视频输出的基本逻辑,在人类社会具有广阔应用前景。但Sora在技术更迭和运用过程中可能给科技伦理带来诸如冲击人的主体性地位、导致人们认知的混乱性、冲击伦理规则的适用性、冲击数字隐私伦理并造成数字歧视等风险。因此,要坚持以人为本,运用技术手段增强Sora的数据筛选力度和敏捷治理效度,防止数据泄露和侵犯隐私,进行伦理设计实现科技伦理与时俱进,辅之必要的教育培训,以此提升全民运用人工智能技术的能力。

关键词： Sora 生成式人工智能科技伦理

单光子探测条件下Rb法拉第反常色散滤波器的研究

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中国激光 2004年第8期31卷 967-970页

作者：李若虹孙献平罗军曾锡之詹明生中国科学院武汉物理与数学研究所波谱与原子分子物理国家开放实验室湖北武汉430071

报道了单光子探测条件下的法拉第反常色散滤波器 (FADOF)滤波特性的实验结果。测量结果表明 ,工作在D2 共振线的Rb原子 780nm法拉第反常色散滤波器的翼谱透射率为 2 8% ,滤光带宽为 0 7GHz ,以及最小可探测激光功率为 0 16 pW/cm2 。... 详细信息

报道了单光子探测条件下的法拉第反常色散滤波器 (FADOF)滤波特性的实验结果。测量结果表明 ,工作在D2 共振线的Rb原子 780nm法拉第反常色散滤波器的翼谱透射率为 2 8% ,滤光带宽为 0 7GHz ,以及最小可探测激光功率为 0 16 pW/cm2 。由于使用了单光子探测器测量法拉第反常色散滤波器物理参数的方法 ,极大地提高了实验测量的探测灵敏度。通过实验数据分析 ,给出了相关的讨论。在日光情况下 ,如果使用这种 780nmRb法拉第反常色散滤波器代替干涉滤波片 ,将极大地降低背景光噪声和减少误码率。

关键词：光电子学单光子探测弱激光法拉第反常色散

Comparative Studies of Different Mesoscale Convection Parameterization Schemes in the Simulation of Mei-Yu Front Heavy Rain

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Atmospheric and Oceanic Science Letters 2010年第3期3卷 132-138页

作者： ping Fan luo Zhe-xian Remote Sensing College Nanjing University of Information Science and Technology Nanjing 210044 China Laboratory of Cloud-Precipitation Physics and Severe Storms (LACS) Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China

The mei-yu front heavy rainstorms occurred over Nanjing on 3 5 and 8 9 July 2003 and were simulated in this paper using the Weather Research and Forecasting Model (WRFv3.1) with various mesoscale convection parameterization schemes (MCPSs). The simulations show that the temporal and spatial evolution and distribution of rainstorms can be modeled; however, there was incongruity between the comparative simulations of four different MCPSs and the observed data. These disparities were exhibited in the simulations of both the 24-hour surface rainfall total and the hourly precipitation rate. Further analysis revealed that the discrepancies of vertical velocity and the convective vorticity vector (CVV) between the four simulations were attributed to the deviation of rainfall values. In addition, the simulations show that the mid-scale convection, particularly the mesoscale convection system (MCS) formation, can be well simulated with the proper mesoscale convection parameterization schemes and may be a crucial factor of the mei-yu front heavy rainstorm. These results suggest that, in an effort to enhance simulation and prediction of heavy rainfall and rainstorms, subsequent studies should focus on the development and improvement of MCPS.

关键词： mesoscale convection parameterization schemes vertical velocity the convective vorticity vector the mesoscale convection system