检索结果-南通市图书馆

Intensification of pretreatment and pressure leaching of copper anode slime by microwave radiation

在线全文

学校读者我要写书评

暂无评论

Journal of Central South University 2015年第12期22卷 4536-4544页

作者：杨洪英马致远黄松涛吕阳熊柳 School of Materials and Metallurgy Northeastern University National Engineering Laboratory of Bio-hydrometallurgy General Research Institute for Nonferrous Metals

The application of microwave irradiation for pretreatment of copper anode slime with high nickel content prior to pressure sulfuric acid leaching has been proposed.The microwave-assisted pretreatment is a rapid and efficient process.Through the technology of microwave assisted pretreatment-pressure leaching of copper anode slime,copper,tellurium,selenium and nickel are almost completely recovered.Under optimal conditions,the leaching efficiencies of copper,tellurium,selenium and nickel are 97.12%,95.97%,95.37% and 93.90%,respectively.The effect of microwave radiation on the temperature of copper anode slime and leaching solution is investigated.It is suggested that the enhancement on the recoveries of copper,tellurium and selenium can be attributed to the temperature gradient which is caused by shallow microwave penetration depth and super heating occurring at the solid–liquid interface.The kinetic study shows that the pressure leaching of copper anode slime,with and without microwave assisted pretreatment,are both controlled by chemical reactions on the surfaces of particles.It is found that the activation energy calculated for microwave-assisted pretreatment-pressure leaching(49.47 kJ/mol) is lower than that for pressure leaching which is without microwave assisted pretreatment(60.57 kJ/mol).

关键词： microwave copper anode slime pretreatment pressure leaching

Use of mesophilic and thermophilic bacteria for the improvement of copper extraction from a low-grade ore

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2011年第2期18卷 138-143页

作者： E.Darezereshki M.Schaffie M.Lotfalian S.A.Seiedbaghery M. Ranjbar Department of Mineral Processing Engineering Bahonar University Energy and Environmental Engineering research Center (EERC) Bahonar University Department of Chemical Engineering Bahonar University Industrial Mining research Center (IMRC) Bahonar University hydrometallurgy research unit R & D Center Sarcheshmeh Copper Complex

Bioleaching was examined for copper extraction from a low grade ore using mesophilic and moderate thermophilic bacteria. Five equal size columns were used for the leaching of the ore. Sulfuric acid solution with a flow rate of 3.12 L·m-2·h-1 and pH 1.5 passed through each column continuously for 90 d. In the first and the second column, bioleaching was performed without agglomeration of the ore and on the agglomerated ore, respectively. 28wt% of the copper was extracted in the first column after 40 d, while this figure was 38wt% in the second column. After 90 d, however, the overall extractions were almost the same for both of them. Bioleaching with mesophilic bacteria was performed in the third column without agglomeration of the ore and in the fourth column on the agglomerated ore. After 40 d, copper extractions in the third and the fourth columns were 62wt% and 70wt%, respectively. Copper extractions were 75wt% for both the columns after 90 d. For the last column, bioleaching was performed with moderate thermophilic bacteria and agglomerated ore. Copper extractions were 80wt% and 85wt% after 40 and 90 d, respectively. It was concluded that crushing and agglomeration of the ore using bacteria could enhance the copper extraction considerably.

关键词： bioleaching mesophilic bacteria thermopilic bacteria copper extraction agglomeration.

Targeted regeneration and upcycling of spent graphite by defect‐driven tin nucleation

在线全文

学校读者我要写书评

暂无评论

Carbon Energy 2024年第4期6卷 91-103页

作者： Zhiheng Cheng Zhiling Luo Hao Zhang Wuxing Zhang Wang Gao Yang Zhang Long Qie Yonggang Yao Yunhui Huang Kun Kelvin Fu State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhanChina Key Laboratory of Automobile Materials(Jilin University) Ministry of EducationDepartment of Materials Science and EngineeringJilin UniversityChangchunChina Electronic Materials research Laboratory(Key Lab of Education Ministry) School of Electronic and Information Engineeringand Instrumental Analysis CenterXi'an Jiaotong UniversityXi'anChina Department of Mechanical Engineering University of DelawareNewarkUSA

The recycling of spent batteries has become increasingly important owing to their wide applications,abundant raw material supply,and sustainable development.Compared with the degraded cathode,spent anode graphite often has a relatively intact structure with few defects after long cycling.Yet,most spent graphite is simply burned or discarded due to its limited value and inferior performance on using conventional recycling methods that are complex,have low efficiency,and fail in performance restoration.Herein,we propose a fast,efficient,and“intelligent”strategy to regenerate and upcycle spent graphite based on defect‐driven targeted remediation.Using Sn as a nanoscale healant,we used rapid heating(~50 ms)to enable dynamic Sn droplets to automatically nucleate around the surface defects on the graphite upon cooling owing to strong binding to the defects(~5.84 eV/atom),thus simultaneously achieving Sn dispersion and graphite remediation.As a result,the regenerated graphite showed enhanced capacity and cycle stability(458.9 mAh g^(−1) at 0.2 A g^(−1) after 100 cycles),superior to those of commercial graphite.Benefiting from the self‐adaption of Sn dispersion,spent graphite with different degrees of defects can be regenerated to similar structures and performance.EverBatt analysis indicates that targeted regeneration and upcycling have significantly lower energy consumption(~99%reduction)and near‐zero CO2 emission,and yield much higher profit than hydrometallurgy,which opens a new avenue for direct upcycling of spend graphite in an efficient,green,and profitable manner for sustainable battery manufacture.

关键词： battery recycling spent graphite targeted regeneration upcycling graphite

黄钾铁矾的生成机理及其对嗜酸氧化亚铁硫杆菌有重要作用的离子的影响(英文)

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Transactions of Nonferrous Metals Society of China 2014年第4期24卷 1152-1160页

作者： B.NAZARI E.JORJANI H.HANI Z.MANAFI A.RIAHI Department of Mining Engineering Tehran Science and Research Branch Islamic Azad University hydrometallurgy research Center Sarcheshmeh Copper ComplexNational Iranian Copper Industries Company

黄钾铁矾的生成对Sarcheshmeh生物堆浸硫化铜矿有不利影响。实验研究了在嗜酸氧化亚铁硫杆菌存在的情况下,生长介质中Fe(II)的初始浓度、pH及温度影响黄钾铁矾沉淀形成的机理。产生最多Fe(III)沉淀的条件为:硫酸亚铁浓度50 g/L、初始pH ... 详细信息

黄钾铁矾的生成对Sarcheshmeh生物堆浸硫化铜矿有不利影响。实验研究了在嗜酸氧化亚铁硫杆菌存在的情况下,生长介质中Fe(II)的初始浓度、pH及温度影响黄钾铁矾沉淀形成的机理。产生最多Fe(III)沉淀的条件为:硫酸亚铁浓度50 g/L、初始pH 2.2、温度32°C。Fe(III)沉淀的生成影响了对嗜酸氧化亚铁硫杆菌有重要作用的离子的浓度,比如:Fe3+、SO 2?4、K+、PO 3?4、Mg2+。对于Fe3+和K+,他们有相似的模式,这些离子共沉淀而形成黄钾铁矾的组分。在pH高于1.6时,由于PO 3?4与黄钾铁矾共沉淀以及嗜酸氧化亚铁硫杆菌较快的生长速度而导致合PO 3?4的化合物的溶解度急剧降低。在生物堆浸的初期,由于脉石的溶解,Mg2+浓度增大,随后缓慢降低。

关键词：黄钾铁矾的生成生物浸铜嗜酸氧化亚铁硫杆菌

从低品位铜矿石中生物浸出铜的基于响应面方法的经验模型(英文)

在线全文

学校读者我要写书评

暂无评论

Transactions of Nonferrous Metals Society of China 2015年第12期25卷 4126-4143页

作者： M.YAGHOBI MOGHADDAM S.Z.SHAFAEI M.NOAPARAST F.DOULATI ARDEJANI H.ABDOLLAHI M.RANJBAR M.SCHAFFIE Z.MANAFI School of Mining College of Engineering University of Tehran Department of Mining Engineering Shahid Bahonar University of Kerman Department of Chemical Engineering Shahid Bahonar University of Kerman hydrometallurgy research unit R&D Center Sarcheshmeh Copper Mine Complex

使用响应面方法对在摇动的生物反应器里浸出铜进行模拟和优化。采用中温细菌生物浸出低品位铜矿石,研究浸矿过程参数的影响,包括p H值、矿浆浓度、亚铁离子起始浓度。检测了浸出1、4、9、14和24天后的铜浸出率,对浸出时间对浸出率的影... 详细信息

使用响应面方法对在摇动的生物反应器里浸出铜进行模拟和优化。采用中温细菌生物浸出低品位铜矿石,研究浸矿过程参数的影响,包括p H值、矿浆浓度、亚铁离子起始浓度。检测了浸出1、4、9、14和24天后的铜浸出率,对浸出时间对浸出率的影响进行建模。采用中心组合设计法(CCD)建立模型,以预测最佳参数值。采用二次方程建模对实验范围内浸出22天的参数进行优化,以达到最大铜浸出率。在最佳条件下(初始p H值2.0,矿浆浓度1.59%,亚铁离子浓度为0)模型预测的铜浸出率为85.98%,这非常接近实验结果(84.57%)。对p H值和矿浆浓度之间以及p H值和亚铁离子浓度之间的相互作用的影响进行研究。结果显示,亚铁离子起始浓度和矿浆浓度之间没有明显的相互作用,而且发现在最佳p H值和矿浆浓度下,铜的浸出率与亚铁离子起始浓度值没有关系。

关键词：建模优化细菌浸出响应面方法铜浸出铜矿

Evaluation of adsorption capacities of humic acids extracted from Algerian soil on polyaniline for application to remove pollutants such as Cd(Ⅱ), Zn(Ⅱ) and Ni(Ⅱ) and characterization with cavity microelectrode

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2011年第7期23卷 1095-1103页

作者： Achour Terbouche Chafia Ait Ramdane-Terbouche Didier Hauchard Safia Djebbar Center of Scientific research and Technical in Physical and Chemical Analysis Laboratory of hydrometallurgy and Molecular Inorganic Chemistry Faculty of Chemistry University of Sciences and Technology Houari Boumediene Sciences Chimiques de Rennes UMR CNRS 6226 Ecole Nationale Supe'rieure de Chimie de Rennes avenue du ge'ne'ral Leclerc Universite' Europe'enne de Bretagne 12 Avenue Janvier 35000 Rennes France

The adsorption capacities of new humic acids isolated from Yakouren forest （YHA） and Sahara （Tamenrasset： THA） soils （Algeria） and commercial humic acid （PFHA） on polyaniline emeraldine base （PEB） were studied at pH 6.6. Also the adsorption of heavy metals such as Cd 2＋ , Zn 2＋ and Ni 2＋ on humic acid-polyaniline systems （HA-PEB） was investigated at the same conditions. HA-PEB compounds were characterized by scanning electron microscopy （SEM）, infrared spectrometry and cavity microelectrode. In addition, batch adsorption and cavity microelectrode were used in the adsorption study of Cd 2＋ , Zn 2＋ and Ni 2＋ on HA-PEB. To develop biocaptors of polluting metals using a cavity microelectrode modified by HA-PEB systems, the adsorption kinetic and adsorption capacity were investigated. The SEM analysis showed that the presence of humic acid affected the PEB surface and caused the formation of a granular morphology. The maximum adsorption capacities （q max ） of PFHA, THA and YHA determined by adsorption isotherms were 91.31, 132.1 and 151.0 mg/g, respectively. Batch adsorption results showed that q max of Cd 2＋ , Zn 2＋ and Ni 2＋ on HA-PEB followed the order： THA-PEB YHA-PEB PFHA-PEB. The voltammograms obtained with HA-PEB modified cavity microelectrode showed the appearance of new redox couples reflecting the adsorption of HA on PEB. Metal-humic acid-polyaniline voltammograms were characterized by appearance of oxidation-reduction couples or reduction wave corresponding to metal. Finally, the result may be exploited to develop a biocaptor based on the cavity microelectrode amended by THA-PEB and YHA-PEB.

关键词： adsorption capacity forest and Sahara humic acids polyaniline heavy metal modified cavity microelectrode.

A CFD model for gas uniform distribution in turbulent flow for the production of titanium pigment in chloride process

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2016年第6期24卷 749-756页

作者： Yadong Li Gang Xie Ting Lei Chongjun Bao Lin Tian Yanqing Hou State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Kunming University of Science and Technology Kunming 650093 China Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Kunming 650093 China Kunming Metallurgical research Institute Kunming 650031 China Key Laboratory of Pressure hydrometallurgy Technology Associated Non-Ferrous Metal Resources Kunming 650031 China Kunming Metallurgy College Kunrning 650-033 China

The fluid dynamic behavior of feeding gas(Ti Cl4) in an annular channel affects the combination of O2 and Ti Cl4 in an oxidation reactor, a key piece of equipment in titanium pigment production. The numerical procedure was validated by a 3-dimensional gas flow in the annular channel. Applying the validated model, the flow characteristics of Ti Cl4 in the oxidation reactor with a tangential inlet were simulated and characterized. The flow distribution with five rectifying rings of different structure was simulated and analyzed. The results showed that the rectifying ring improved the distribution uniformity of the pressure and outlet velocity. Compared to the original case without a rectifying ring, the non-uniformity of the pressure and outlet velocity could be reduced by up to91% and 69% respectively. The rectifying ring #5, which can be installed and adjusted easily, is more effective in realizing even distribution. In addition, installation of the rectifying ring effectively reduced the circulating flow in an annular channel as well as the total energy loss.

关键词：流体力学模型数值计算程序气体流动均匀分布生产过程湍流流动钛白粉 TiCl4

Energy recovery and abatement potential of CO_2 emissions for an integrated iron and steel making enterprise

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2010年第1期53卷 129-133页

作者： LI HongFu1,2,BAO WeiJun3,LI HuiQuan3 & CANG DaQiang1 1 Ecology and Recycling Metallurgy Laboratory,Ministry of Education,School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 10083,China 2 Jinan iron & Steel Group Ltd.,Jinan 250101,China 3 National Engineering Laboratory for Clean Production Technology of hydrometallurgy,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China Ecology and Recycling Metallurgy Laboratory Ministry of Education School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing China Jinan iron & Steel Group Ltd. Jinan China National Engineering Laboratory for Clean Production Technology of hydrometallurgy Institute of Process Engineering Chinese Academy of Sciences Beijing China

The typical features for an integrated iron & steelmaking industry are high energy consumption and CO2 emission.The traditional BF-BOF process in an integrated Iron and steelmaking enterprise produces a large amount of residual heat and energy,which has great potential for recovery and abatement potential of CO2 emissions.In this paper,for an integrated Iron & steelmaking enterprise of 10 million tons per year in capacity,the residual heat and energy recovery analysis was conducted.It is indicateded that the residual heat and energy can be recovered as electric power by using present advanced process technology.By means of the distributed power generation,the residual heat and energy can be recovered,with a power generation capacity of 419.5 kWh per ton steel product.Accordingly,the abatement potential of CO2 emissions for an integrated iron & steel making enterprise was also evaluated,which indicated that about 398.5 kg CO2 could be reduced per ton steel product.

关键词： Iron and Steelmaking enterprise residual heat and energy recovery distributed power generation abatement potential of CO2 emission

Recent progress in hydrodynamic characteristics research and application of annular centrifugal extractors

在线全文

学校读者我要写书评

暂无评论

Frontiers of Chemical Science and Engineering 2022年第6期16卷 854-873页

作者： Hang Yang Xiaoyong Yang Xiao Dong Zhaojin Lu Zhishan Bai Yinglei Wang Fulei Gao School of Mechanical and Power Engineering East China University of Science and TechnologyShanghai 200237China Xi'an Modern Chemistry research Institute Xi'an 710000China

The annular centrifugal extractor(ACE)integrates mixing and separation.It has been widely used in many industrial fields because of its low residence time,compact structure,and high mass transfer efficiency.Most of the literature has focused on flow instabilities,flow visualization,and computational fluid dynamics simulations.More recently,research on hydrodynamic behavior and structural optimization has received widespread attention.With the development of ACE technology,applications have been broadened into several new areas.Hence,this paper reviews research progress regarding ACE in terms of hydrodynamic characteristics and the structural improvements.The latest applications covering hydrometallurgy,nuclear fuel reprocessing,bio-extraction,catalytic reaction,and wastewater treatment are presented.We also evaluate future work in droplet breakup and coalescence mechanisms,structural improvements specific to different process requirements,scaling-up methods,and stability and reliability after scaling-up.

关键词： annular centrifugal extractor hydrodynamic characteristics structure optimization the latest application