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Toward high-sulfur-content,high-performance lithium-sulfur batteries:Review of materials and technologies 被引量:8
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作者 Fulai Zhao Jinhong Xue +3 位作者 Wei Shao Hui Yu Wei Huang Jian Xiao 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2023年第5期625-657,I0014,共34页
Lithium sulfur batteries(LSBs)are recognized as promising devices for developing next-generation energy storage systems.In addition,they are attractive rechargeable battery systems for replacing lithium-ion batteries(... Lithium sulfur batteries(LSBs)are recognized as promising devices for developing next-generation energy storage systems.In addition,they are attractive rechargeable battery systems for replacing lithium-ion batteries(LIBs)for commercial use owing to their higher theoretical energy density and lower cost compared to those of LIBs.However,LSBs are still beset with some persistent issues that prevent them from being used industrially,such as the unavoidable dissolution of lithium polysulfide intermediates during electrochemical reactions and large volume expansion(up to 80%)upon the formation of Li_(2)S,resulting in serious battery life and safety limitations.In the process of solving these problems,it is necessary to maintain a high sulfur content in the cathode materials to ensure that the LSBs have high energy densities and excellent cycle performance.In this review,the novel preparation methods and cathode materials used for preparing LSBs in recent years are reviewed considering the sulfur content and cycle performance.In addition,the problems and difficulties in practically applying cathode materials are described,and the development trend is discussed. 展开更多
关键词 Lithium sulfur batteries Cathode material high sulfur content Cycle performance
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Hierarchically porous Fe/N/S/C nanospheres with high-content of Fe-Nx for enhanced ORR and Zn-air battery performance 被引量:1
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作者 Luming Wu Ruge Zhao +5 位作者 Guo Du Huan Wang Machuan Hou Wei Zhang Pingchuan Sun Tiehong Chen 《Green Energy & Environment》 SCIE EI CAS CSCD 2023年第6期1693-1702,共10页
Heteroatom-doped carbon-based transition-metal single-atom catalysts(SACs) are promising electrocatalysts for oxygen reduction reaction(ORR). Herein, with the aid of hierarchically porous silica as hard template, a fa... Heteroatom-doped carbon-based transition-metal single-atom catalysts(SACs) are promising electrocatalysts for oxygen reduction reaction(ORR). Herein, with the aid of hierarchically porous silica as hard template, a facile and general melting perfusion and mesopore-confined pyrolysis method was reported to prepare single-atomic Fe/N–S-doped carbon catalyst(FeNx/NC-S) with hierarchically porous structure and well-defined morphology. The FeNx/NC-S exhibited excellent ORR activity with a half-wave potential(E_(1/2)) of 0.92 V, and a lower overpotential of 320 mV at a current density of 10 mA cm^(-2)for OER under alkaline condition. The remarkable electrocatalysis performance can be attributed to the hierarchically porous carbon nanospheres with S doping and high content of Fe-Nx sites(up to 3.7 wt% of Fe), resulting from the nano-confinement effect of the hierarchically porous silica spheres(NKM-5) during the pyrolysis process. The rechargeable Zn-air battery with FeNx/NC-S as a cathode catalyst demonstrated a superior power density of 194.5 mW cm-2charge–discharge stability. This work highlights a new avenue to design advanced SACs for efficient sustainable energy storage and conversion. 展开更多
关键词 Melting perfusion Nano-confined pyrolysis Hierarchically porous high content of Fe-Nx sites sulfur doping Oxygen reduction reaction
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Regulation of carbon distribution to construct high-sulfur-content cathode in lithium-sulfur batteries 被引量:8
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作者 Meng Zhao Yan-Qi Peng +2 位作者 Bo-Quan Li Xue-Qiang Zhang Jia-Qi Huang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2021年第5期203-208,共6页
Lithium-sulfur(Li-S)battery is regarded as one of the most promising next-generation energy storage systems due to the ultra-high theoretical energy density of 2600 Wh kg^(-1).To address the insulation nature of sulfu... Lithium-sulfur(Li-S)battery is regarded as one of the most promising next-generation energy storage systems due to the ultra-high theoretical energy density of 2600 Wh kg^(-1).To address the insulation nature of sulfur,nanocarbon composition is essential to afford acceptable cycling capacity but inevitably sacrifices the actual energy density under working conditions.Therefore,rational structural design of the carbon/sulfur composite cathode is of great significance to realize satisfactory electrochemical performances with limited carbon content.Herein,the cathode carbon distribution is rationally regulated to construct high-sulfur-content and high-performance Li-S batteries.Concretely,a double-layer carbon(DLC)cathode is prepared by fabricating a surface carbon layer on the carbon/sulfur composite.The surface carbon layer not only provides more electrochemically active surfaces,but also blocks the polysulfide shuttle.Consequently,the DLC configuration with an increased sulfur content by nearly 10 wt%renders an initial areal capacity of 3.40 mAh cm^(-2) and capacity retention of 83.8%during 50 cycles,which is about two times than that of the low-sulfur-content cathode.The strategy of carbon distribution regulation affords an effective pathway to construct advanced high-sulfur-content cathodes for practical high-energy-density Li-S batteries. 展开更多
关键词 Lithium-sulfur batteries high sulfur content high areal loading Double-layer carbon high energy density
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Sulfur phase and sulfur removal in high sulfur-containing bauxite 被引量:15
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作者 胡小莲 陈文汨 谢巧玲 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第7期1641-1647,共7页
The sulfur phase in high sulfur-containing bauxite was studied by an X-ray diffraction analysis and a chemistry quantitative analysis.The methods for the removal of different shaped sulfur were also discussed.The resu... The sulfur phase in high sulfur-containing bauxite was studied by an X-ray diffraction analysis and a chemistry quantitative analysis.The methods for the removal of different shaped sulfur were also discussed.The results show that sulfur phases in high sulfur-containing bauxites exist in the main form of sulfide sulfur (pyrite) or sulfate sulfur,and the main sulfur forms of bauxites from different regions are not the same.Through a combination of an X-ray diffraction analysis and a chemistry quantitative analysis,the sulfur phases of high sulfur-containing bauxite could be accurately investigated.Deciding the main sulfur form of high sulfur-containing bauxite could provide theoretical instruction for choosing methods for the removal of sulfur from bauxite,and an oxidizing-roasting process is an effective way to remove sulfide sulfur from high sulfur-containing bauxite,the content of S^2-in crude ore in the digestion liquor is above 1.7 g/L,but in the roasted ore digestion liquor,it is below 0.18 g/L.Using the sodium carbonate solution washing technology to wash bauxite can effectively remove sulfate sulfur,the content of the total sulfur in ore is lowered to below 0.2% and can meet the production requirements for the sulfur content. 展开更多
关键词 high sulfur-containing bauxite sulfur phase oxidizing-roasting sodium carbonate solution washing technology
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Effects of electrolyte recycling on desulfurization from bauxite water slurry electrolysis 被引量:4
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作者 吕艾静 沈羿麒 +3 位作者 公旭中 王志 汪玉华 王明涌 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2016年第6期1714-1720,共7页
To lower the cost of bauxite electrolysis desulfurization using NaOH solution as the supporting electrolyte, effects of electrolyte recycling on bauxite electrolysis desulfurization were investigated. The results in... To lower the cost of bauxite electrolysis desulfurization using NaOH solution as the supporting electrolyte, effects of electrolyte recycling on bauxite electrolysis desulfurization were investigated. The results indicate that electrode corrosion, cell voltage, the desulfurization rate and the pH value of the electrolyte have no obvious changes with the increase of cycle times. Additionally, there were some transitive valence S-containing ions in electrolyte after the electrolysis, such as SO3^2-,S2O3^2- . However, most of the sulfur in bauxite was eventually oxidized into SO4^2- into the electrolyte, and these S-containing ions did not affect the recycling utilization for electrolyte. 展开更多
关键词 high sulfur bauxite ELECTROLYSIS DEsulfurIZATION ELECTROLYTE RECYCLING
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A crosslinking hydrogel binder for high-sulfur content S@pPAN cathode in rechargeable lithium batteries 被引量:1
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作者 Huanhuan Yuan Cheng Guo +4 位作者 Jiahang Chen Huichao Lu Jun Yang Yanna Nuli Jiulin Wang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2021年第9期360-367,共8页
High-energy density lithium-sulfur(Li-S) batteries have received intensive attention as promising energy storage system.Among diverse sulfur-based cathodes,sulfurized pyrolyzed poly(acrylonitrile)(S@pPAN)cathode deliv... High-energy density lithium-sulfur(Li-S) batteries have received intensive attention as promising energy storage system.Among diverse sulfur-based cathodes,sulfurized pyrolyzed poly(acrylonitrile)(S@pPAN)cathode delivered superior electrochemical performance.However,the sulfur content of S@pPAN is relatively low(<50 wt%),which significantly limits the energy density.Herein,a hydrogel SA-Cu binder was proposed with a crosslinking network constructed by Cu^(2+) ions.The introduction of Cu^(2+) ions enabled excellent electrochemical behaviors of S@pPAN cathode even with high sulfur content of 52.6 wt% via chemical interaction with sulfur and polysulfide.Moreover,a favorable cathode interphase was formed containing electrochemically active and conductive CuSx.S@pPAN/SA-Cu exhibited a high sulfur utilization of 85.3%,long cycling stability over 1000 cycles and remarkable capacity of 1200 mAh g_(s)^(-1) even at10 C.Furthermore,ascribed to the improved electrode structure,high-loading electrode(sulfur loading:4 mg cm^(-2)) displayed stable cycling with areal capacity of 5.26 mAh cm^(-2)(1315 mAh g_(s)^(-1)) after 40 cycles.This study provides new directions to prepare high-sulfur content and high-loading S@pPAN cathode for higher energy density. 展开更多
关键词 Hydrogel binder Crosslinking network Chemical binding agents high sulfur content Lithium-sulfur battery
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Electrochemical behaviors of anode materials and their performance for bauxite desulfurization
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作者 Yingnan Hu Aijing Lü +4 位作者 Mingyong Wang Dong Wang Junhao Liu Zhi Wang Xuzhong Gong 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2019年第4期802-810,共9页
Pyrite inside bauxite could be oxidized into soluble S-containing ions by electrolysis, and thus achieving bauxite desulfurization by using filtration. However, S-containing ions in electrolyte had some corrosion effe... Pyrite inside bauxite could be oxidized into soluble S-containing ions by electrolysis, and thus achieving bauxite desulfurization by using filtration. However, S-containing ions in electrolyte had some corrosion effects on electrode, especially for anode. In this work, six kinds of traditional materials were selected as anode, and their corrosion behaviors were examined by using electrochemistry characterization. Tafel and CV curves from simulating electrolyte suggested that their corrosion potentials were in the following order: Ni﹥C﹥SS﹥Fe﹥Cu﹥Pb–Ag. As expected, the desulfurization ratio and cell voltage from bauxite electrolysis were in the following order respectively: Cu﹥Ni﹥Fe﹥SS﹥C﹥Pb–Ag and Ni﹥Fe﹥SS﹥Cu﹥C﹥Pb–Ag. Finally, Ni was proposed a kind of excellent electrode material for bauxite desulfurization from electrolysis. 展开更多
关键词 Corrosion resistance high sulfur bauxite ELECTROLYSIS DEsulfurIZATION ELECTRODE materials
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Preparation of High Ga Content Cu(In,Ga)Se<sub>2</sub>Thin Films by Sequential Evaporation Process Added In<sub>2</sub>S<sub>3</sub>
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作者 Toshiyuki Yamaguchi Kazuma Tsujita +1 位作者 Shigetoshi Niiyama Toshito Imanishi 《Advances in Materials Physics and Chemistry》 2012年第4期106-109,共4页
High Ga content Cu(In,Ga)Se2 thin films incorporated sulfur were prepared by sequential evaporation from CuGaSe2 and CuInSe2 ternary compounds and subsequently Ga2Se3, In2Se3 and In2S3 binary compounds. The In2S3/(Ga2... High Ga content Cu(In,Ga)Se2 thin films incorporated sulfur were prepared by sequential evaporation from CuGaSe2 and CuInSe2 ternary compounds and subsequently Ga2Se3, In2Se3 and In2S3 binary compounds. The In2S3/(Ga2Se3+ In2Se3) ratio was varied from 0 to 0.13, and the properties of the thin films were investigated. XRD studies demonstrated that the prepared thin films had a chalcopyrite Cu(In,Ga)Se2 structure. The S/(Se+S) mole ratio in the thin films was within the range from 0 to 0.04. The band gaps of Cu(In,Ga)Se2 thin films increased from 1.30 eV to 1.59 eV with increasing the ?In2S3 /(Ga2Se3+ In2Se3) ratio. 展开更多
关键词 Cu(In Ga)Se2Thin Film Solar Cell high GA content sulfur Incorporation SEQUENTIAL Evaporation
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Sulfur polymerization strategy based on the intrinsic properties of polymers for advanced binder-free and high-sulfur-content Li–S batteries 被引量:1
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作者 Zihui Song Tianpeng Zhang +5 位作者 Siyang Liu Wenlong Shao Wanyuan Jiang Runyue Mao Xigao Jian Fangyuan Hu 《SusMat》 2023年第1期111-127,共17页
Lithium-sulfur(Li-S)batteries are the promising next-generation secondary energy storage systems,because of their advantages of high energy density and environmental friendliness.Among numerous cathode materials,organ... Lithium-sulfur(Li-S)batteries are the promising next-generation secondary energy storage systems,because of their advantages of high energy density and environmental friendliness.Among numerous cathode materials,organosulfur polymer materials have received extensive attentions because of their controllable structure and uniform sulfur distribution.However,the sulfur content of most organosulfur polymer cathodes is limited(S content<60%)due to the addition of large amounts of conductive agents and binders,which adversely affects the energy density of Li-S batteries.Herein,a hyperbranched sulfur-rich polymer based on modified polyethyleneimine(Ath-PEI)named carbon nanotubeentangled poly(allyl-terminated hyperbranched ethyleneimine-random-sulfur)(CNT/Ath-PEI@S)was prepared by sulfur polymerization and used as a Li-S battery cathode.The high intrinsic viscosity of Ath-PEI provided considerable adhesion and avoided the addition of PVDF binder,thereby increasing the sulfur content of cathodes to 75%.Moreover,considering the uniform distribution of elemental sulfur by the polymer,the utilization of sulfur was successfully improved,thus improving the rate capability and discharge capacity of the battery.The binder-free,sulfur-rich polymer cathode exhibited ultra-high initial discharge capacity(1520.7 mAh g^(−1) at 0.1 C),and high rate capability(804 mAh g^(−1) at 2.0 C).And cell-level calculations show that the electrode exhibits an initial capacity of 942.3 mAh g^(−1) electrode,which is much higher than those of conventional sulfur-polymer electrodes reported in the literature. 展开更多
关键词 high sulfur content intrinsic viscosity Li-S batteries organosulfur polymers sulfur uniform distribution
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The construction of technical standard system for ultra deep and high sour gas fields in Northeast Sichuan
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作者 Liu Yintao Liao Chengrui Yang Yukun 《Engineering Sciences》 2012年第4期68-75,共8页
To deal with the exploitation difficulties of gas fields in Northeast Sichuan with deep marine strata, after researching the relative standards domestic and abroad extensively, summarizing and promoting the successful... To deal with the exploitation difficulties of gas fields in Northeast Sichuan with deep marine strata, after researching the relative standards domestic and abroad extensively, summarizing and promoting the successful experiences and failure lessons of project construction technology application scientifically, Sinopec has established an integrated technical standard system for the exploration and development of ultra deep and high sour gas fields. The system consists of 51 enterprise standards and covers 7 professions including geophysical prospecting, drilling, drilling log, well logging, gas formation test and production, sour gas gathering and transferring system, and HSE (health,safety,environment). It guides and guarantees the safe, high-quality and high-efficiency project construction effectively by means of enhancing the engineering design criterion, recommending the data processing and interpretation methods, identifying the requirements of operation and field inspection and standardizing the application of technical equipments. 展开更多
关键词 ultra deep high sulfur content natural gas exploration and development enterprise standard
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内蒙古某含碳高硫锌锡矿石选矿试验研究
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作者 张锦仙 吕超 杨林 《金属矿山》 CAS 北大核心 2024年第3期99-104,共6页
内蒙古某含碳高硫锌锡矿石锌品位1.02%、锡品位0.86%,硫和碳含量分别为14.02%、1.68%。矿石矿物组成较复杂,主要有用矿物为闪锌矿、锡石和黄铁矿,脉石矿物主要为石英、绿泥石和绢云母等。为确定矿石合理的开发利用工艺,采用预先脱碳—... 内蒙古某含碳高硫锌锡矿石锌品位1.02%、锡品位0.86%,硫和碳含量分别为14.02%、1.68%。矿石矿物组成较复杂,主要有用矿物为闪锌矿、锡石和黄铁矿,脉石矿物主要为石英、绿泥石和绢云母等。为确定矿石合理的开发利用工艺,采用预先脱碳—浮重联合工艺流程开展选矿试验研究。结果表明,矿石经预先脱碳、1粗1扫1精锌硫混选、1粗1扫3精锌硫分离浮选流程处理,闭路试验可得到Zn品位为45.16%、Zn回收率为71.19%的锌精矿,S品位为46.92%、S回收率81.91%的硫精矿;浮选尾矿采用摇床重选,经粗选、精选、复选和中矿再选,可获得Sn品位45.52%、Sn回收率81.99%的锡精矿,以及Sn品位3.13%、Sn回收率11.09%的锡中矿。所设计试验流程较好地解决了矿石中有机碳对浮选的不利影响,综合回收了有价矿物,可为同类矿石的开发利用提供理论借鉴。 展开更多
关键词 含碳 高硫 锌硫混选 锡石 摇床
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高硫高铁铝土矿脱硫除铁研究进展 被引量:1
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作者 李晓坤 段语嫣 +1 位作者 赵冰 袁帅 《有色金属(选矿部分)》 CAS 2024年第5期1-13,23,共14页
铝是人们现代生活中重要的金属材料,铝土矿是生产铝的主要原料,随着国内铝工业的持续发展,铝土矿资源的需求量在逐年增加。但国内铝土矿资源品质较低,供给不足,铝土矿对外依存度较高,严重制约了我国铝资源的供应安全,对我国铝工业的可... 铝是人们现代生活中重要的金属材料,铝土矿是生产铝的主要原料,随着国内铝工业的持续发展,铝土矿资源的需求量在逐年增加。但国内铝土矿资源品质较低,供给不足,铝土矿对外依存度较高,严重制约了我国铝资源的供应安全,对我国铝工业的可持续性发展产生较大威胁。为了应对我国高品质铝土矿资源的匮乏问题,开发高硫高铁等复杂难选铝土矿资源,对确保我国铝土矿资源的战略安全至关重要。我国高硫高铁等复杂铝土矿资源量大,约15亿t以上,并伴生其他战略金属资源,目前亟待高效开发,利用先进工艺可实现此类典型贫杂铝土矿的工业化应用。铝土矿中过多的硫杂质和铁杂质会对拜耳法提铝工艺产生不可忽视的影响,如腐蚀设备和管道、增加碱耗和赤泥量、影响氧化铝的质量等。因此,从我国高硫高铁铝土矿的资源现状及特点入手,综述了高硫高铁铝土矿脱硫除铁工艺现阶段的研究进展,总结了浮选脱硫、预焙烧脱硫、生物法脱硫、湿法脱硫等主要脱硫技术及物理法除铁、化学法除铁、生物法除铁等主要除铁技术,探讨了各种工艺的工业化应用水平并列举了几个典型高硫高铁铝土矿的工业化应用实例,将为我国开发利用复杂铝土矿资源提供理论支撑,使难利用铝资源得到有效利用,降低我国对国外铝资源的依赖水平,提高铝土矿资源的保障力。 展开更多
关键词 高硫高铁铝土矿 脱硫 除铁 研究现状
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高硫高铁铝土矿悬浮焙烧同步脱硫除铁试验研究
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作者 段语嫣 赵冰 +2 位作者 孙永升 李晓坤 袁帅 《有色金属(选矿部分)》 CAS 2024年第5期89-98,117,共11页
中国铝土矿资源质量每况愈下,高品位铝土矿资源日渐枯竭,资源问题已成为中国铝工业发展的重要难题,而尚未得到工业规模开发利用的高硫高铁铝土矿属于难利用资源,具有巨大的潜在工业价值,对高硫高铁铝土矿开展脱硫除铁基础研究具有重要... 中国铝土矿资源质量每况愈下,高品位铝土矿资源日渐枯竭,资源问题已成为中国铝工业发展的重要难题,而尚未得到工业规模开发利用的高硫高铁铝土矿属于难利用资源,具有巨大的潜在工业价值,对高硫高铁铝土矿开展脱硫除铁基础研究具有重要的理论与实际意义。针对广西高硫高铁铝土矿综合开发利用难题,采用“悬浮氧化焙烧—还原焙烧—磁选”工艺进行了系统的铝土矿脱硫除铁试验,并利用X射线衍射分析(XRD)、化学物相分析和X射线光电子能谱分析(XPS)等方法,研究了焙烧过程中矿物物相的转化。结果表明,矿物中主要含硫和含铁矿物为黄铁矿,采用“悬浮氧化焙烧—还原焙烧—磁选”工艺可同步实现硫元素的高效脱除和铁元素的富集分离。当悬浮氧化焙烧条件为焙烧温度700℃、焙烧时间40min、O2浓度40%、总气量600mL/min,可获得St为0.396%、脱硫率为98.10%的氧化焙烧产品;然后进行悬浮还原焙烧条件为焙烧温度550℃、焙烧时间20min、CO浓度20%、总气量600mL/min、磁场强度150kA/m时,可获得TFe为54.79%的铁精矿和St为0.248%、TFe为4.37和Al2O3含量为75.27%的富铝矿。此技术大幅度提高了高硫高铁铝土矿的Al2O3含量,有利于后续铝土矿溶出,达到了脱硫除铁提铝的技术目标。该工艺为该类难选高硫高铁铝土矿资源的高效利用提供了一种新的技术途径。 展开更多
关键词 高硫高铁铝土矿 悬浮焙烧 脱硫 除铁 黄铁矿
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我国高硫铝土矿脱硫及伴生钴资源综合利用研究进展
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作者 张文谱 王晓慧 +1 位作者 吴威龙 赵开乐 《金属矿山》 CAS 北大核心 2024年第9期75-83,共9页
铝土矿是战略性紧缺矿产资源,我国高硫铝土矿占比高,其高效开发利用有利于减轻我国铝工业原料的供应压力。针对高硫铝土矿的资源特点,对高硫铝土矿脱硫研究现状进行了总结,综述了预先脱硫和氧化铝生产过程中脱硫的优缺点;并基于浮选脱... 铝土矿是战略性紧缺矿产资源,我国高硫铝土矿占比高,其高效开发利用有利于减轻我国铝工业原料的供应压力。针对高硫铝土矿的资源特点,对高硫铝土矿脱硫研究现状进行了总结,综述了预先脱硫和氧化铝生产过程中脱硫的优缺点;并基于浮选脱硫方式,探究了铝土矿中伴生钴资源的综合利用思路。高硫铝土矿脱硫的目标是将硫含量降低到符合氧化铝生产或其他工业应用的要求。焙烧脱硫、浮选脱硫、沉淀法脱硫等是高硫铝土矿脱硫的主要方式。其中,浮选脱硫是脱硫方式中较为成熟的工艺,具有效率高、成本低的优点;浮选脱硫也是伴生钴资源综合利用的关键一步,工业推广前景可观。对高硫铝土矿伴生钴资源进行综合回收,能够提高资源综合利用率,提高国内钴资源的自给率,降低对国外资源的依赖程度。对于高硫铝土矿伴生硫钴资源的回收利用,选冶联合是综合回收硫钴重点攻关方向。 展开更多
关键词 高硫铝土矿 脱硫 钴资源 综合利用
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高硫铝土矿脱硫方法研究进展
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作者 王鸿运 刘燕 +1 位作者 张廷安 李小龙 《中国有色冶金》 CAS 北大核心 2024年第4期13-23,共11页
高品质铝土矿在我国属于紧缺性矿产资源,我国有大量高硫铝土矿资源,但高硫铝土矿冶炼会降低Al_(2)O_(3)溶出率、降低赤泥沉降性能、污染氢氧化铝产品、腐蚀生产设备等,因此高硫铝土矿脱硫技术成为实现其高效综合利用、缓解铝土矿资源短... 高品质铝土矿在我国属于紧缺性矿产资源,我国有大量高硫铝土矿资源,但高硫铝土矿冶炼会降低Al_(2)O_(3)溶出率、降低赤泥沉降性能、污染氢氧化铝产品、腐蚀生产设备等,因此高硫铝土矿脱硫技术成为实现其高效综合利用、缓解铝土矿资源短缺的关键。目前高硫铝土矿脱硫技术主要分为预处理脱硫和溶出过程脱硫。预处理脱硫包括浮选法、焙烧法、电化学脱硫、微生物脱硫等。浮选法适合于含硫较低的铝矿石资源,对于低品位、高硫含量的铝矿石则存在浮选药剂用量大、废水排放量大等问题;焙烧法脱硫效率高,但传统堆积焙烧存在焙烧时间长、能耗高等问题;电化学脱硫具有低温、常压、高脱硫率、无二次污染等优点,但存在能耗高、生产规模受限制等问题;微生物脱硫生产成本和能耗较低、环保性较高,但特定菌种对生长环境要求苛刻,培育菌种周期长。溶出过程脱硫包括氧化蒸发法脱硫、沉淀法脱硫和石灰法脱硫等。氧化蒸发法能够清除铝酸钠溶液中大部分S^(2-),但对其他形态硫氧化效果不明显;沉淀法脱硫操作较为简单,但存在脱硫剂成本高,难以应用于实际生产的问题;石灰法只能脱除溶液中SO_(4)^(2-),对其他类型硫离子并未产生显著去除作用。未来,建议从以下几个方向着手解决高硫铝土矿脱硫问题:开发低温高效、低能耗焙烧工艺;改善或者研发新型脱硫捕收剂;筛选高效、易培育菌种,研究混合菌脱硫效果。 展开更多
关键词 铝冶炼 高硫铝土矿 预处理脱硫 溶出过程脱硫 浮选脱硫 焙烧脱硫 微生物脱硫
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土壤中全硫测定——硫分析仪选择及方法优化
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作者 晋琪 汪洪 《中国土壤与肥料》 CAS CSCD 北大核心 2024年第3期240-246,共7页
全硫含量是土壤调查项目中的必测项目。在燃烧法直接测定固体样品的硫分析仪中,高频红外碳硫仪检测限低,检测速度快,燃烧温度高,测定土壤标准物质的准确度高,是快速测定土壤中全硫的最佳仪器。应用高频红外碳硫仪测定样品过程中,坩埚空... 全硫含量是土壤调查项目中的必测项目。在燃烧法直接测定固体样品的硫分析仪中,高频红外碳硫仪检测限低,检测速度快,燃烧温度高,测定土壤标准物质的准确度高,是快速测定土壤中全硫的最佳仪器。应用高频红外碳硫仪测定样品过程中,坩埚空白、通氧流量、样品称样量、助熔剂添加量、定量方法等均会对测定结果准确度产生影响。通过对上述影响条件进行优化,研究确定了测定土壤中全硫含量的最佳条件:在严格控制坩埚空白的前提下,通氧流量设定为2~3 L/min,依次称取0.1 g样品(精度:0.0001 g)、0.5 g纯铁(精度:0.001 g)和1.0 g钨粒助熔剂(精度:0.001 g)混合后上机分析,对不同浓度样品进行分段校正。值得注意的是,本研究证实了利用化学物质标准品建立工作曲线的可行性,为后期仪器优化和改进提供了宝贵思路。国家土壤标准物质测定结果的相对标准偏差(RSD)小于2%(n=6),测定值与标准值相对误差(RE)的绝对值小于1%(n=6),方法检出限为4.50μg/g,说明方法的准确度和精密度高,适用于低含硫量土壤样品的批量检测。 展开更多
关键词 硫含量 土壤 高频红外碳硫仪 最佳条件
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带报警装置爆破片在高含硫天然气放空系统中的应用
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作者 罗浩 袁艺朗 +2 位作者 翟海龙 黄强 黄英海 《石油化工安全环保技术》 CAS 2024年第1期45-48,I0003,共5页
高含硫天然气生产现场常见爆破片等安全保护装置,标准中规定爆破片更换周期2-3年,期间爆破片破裂难以及时发现,给安全生产带来隐患。基于姜一昌、温殿江等人设计的一种爆破片运行状态监测装置理论研究,在爆破片环缝圆板上设计1根固定报... 高含硫天然气生产现场常见爆破片等安全保护装置,标准中规定爆破片更换周期2-3年,期间爆破片破裂难以及时发现,给安全生产带来隐患。基于姜一昌、温殿江等人设计的一种爆破片运行状态监测装置理论研究,在爆破片环缝圆板上设计1根固定报警导线,爆破片破裂时环缝圆板张开将其上固定的报警导线拉断,通过信号远传让操作人员及时发现爆破片破裂,从而第一时间更换爆破片。现场应用表明:带报警装置爆破片能够让值班室操作人员迅速发现爆破片破裂并及时更换爆破片,可有效预防长明火场站的火源通过破裂的爆破片越过阻火器进入气田水罐,防止安全生产事故的发生,对长明火和阻火器易堵塞的高含硫场站具有一定的推广应用价值。 展开更多
关键词 爆破片 破裂 高含硫 报警器 远传 放空系统
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分子动力学模拟在石油管材腐蚀与防护中的应用
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作者 余凤玲 周普 +1 位作者 胡凌霄 朱世东 《全面腐蚀控制》 2024年第4期146-150,共5页
当前油田开采面临着高温高压、高Cl^(-)、高含硫等日渐复杂的工况环境,石油管材的耐蚀性能以及防护技术的适用性面临较大挑战,分子动力学模拟技术因其不受实验条件的限制且具有广尺度特点可弥补传统评价方法的不足。本文首先简述了分子... 当前油田开采面临着高温高压、高Cl^(-)、高含硫等日渐复杂的工况环境,石油管材的耐蚀性能以及防护技术的适用性面临较大挑战,分子动力学模拟技术因其不受实验条件的限制且具有广尺度特点可弥补传统评价方法的不足。本文首先简述了分子动力学模拟技术的基本原理;并基于分子动力学模拟应用,阐述了管材在Cl^(-)、CO_(2)/H_(2)S等体系中的分子动力学腐蚀机理研究,概述了分子动力学在研究防腐涂层中的研究应用。最后,对分子动力学模拟技术今后在耐蚀材料研发中发展方向进行了展望,以期为油气田用新材料的研制、防护技术的应用提供理论基础与技术支持。 展开更多
关键词 分子动力学 油田 高含硫 腐蚀机理 防护技术
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降低铅冶炼底吹炉高铅渣含硫量的生产实践
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作者 闫友 付高明 +1 位作者 胡卫文 阳自霖 《绿色矿冶》 2024年第1期34-39,共6页
某铅冶炼厂采用“富氧底吹氧化-氧气侧吹还原”工艺进行粗铅冶炼,底吹炉产出的高铅渣含硫量较高,达到1.3%~1.6%,对后续尾气脱硫系统造成一定影响,环保处理成本升高。为了解决该问题,本文结合理论和生产实践分析了铅冶炼底吹炉高铅渣含... 某铅冶炼厂采用“富氧底吹氧化-氧气侧吹还原”工艺进行粗铅冶炼,底吹炉产出的高铅渣含硫量较高,达到1.3%~1.6%,对后续尾气脱硫系统造成一定影响,环保处理成本升高。为了解决该问题,本文结合理论和生产实践分析了铅冶炼底吹炉高铅渣含硫高的主要原因。高铅渣中的硫主要以硫酸根形态存在,这些硫酸根一部分来自入炉物料中的硫酸盐类铅物料,另一部分则是在熔炼过程中由硫化铅精矿发生氧化反应生成的。降低高铅渣含硫量的主要途径是提高熔池熔炼的温度和降低系统中SO_(2)的分压。结合生产实践从渣型、氧料比、入炉粒矿含硫、系统SO_(2)分压等方面探讨了降低底吹炉高铅渣含硫量的途径和方法。在含铅渣料搭配比例30%左右,控制渣温1050~1100℃,控制渣型FeO/SiO_(2)1.4~1.8,CaO/SiO_(2)0.4~0.6;氧料比100~110 Nm^(3)/t,入炉粒矿有效硫12.5%~13.5%及适当负压等相关工艺参数组合条件下,可使高铅渣残硫保持在1.2%以下。 展开更多
关键词 铅冶炼 底吹炉 高铅渣 渣含硫量
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贵州某高硫铝土矿矿物特性研究
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作者 李涵 张覃 《有色金属(选矿部分)》 CAS 2024年第7期12-21,共10页
以贵州某高硫铝土矿作为研究对象,采用X射线荧光光谱(XRF)、X射线衍射(XRD)、矿物参数自动定量分析系统(MLA)等测试手段结合密度泛函理论(DFT)计算,对该矿石的矿物特性进行研究,研究结果表明,该矿石氧化铝品位为60.97%,硫主要以硫化物... 以贵州某高硫铝土矿作为研究对象,采用X射线荧光光谱(XRF)、X射线衍射(XRD)、矿物参数自动定量分析系统(MLA)等测试手段结合密度泛函理论(DFT)计算,对该矿石的矿物特性进行研究,研究结果表明,该矿石氧化铝品位为60.97%,硫主要以硫化物的形态存在,含量为3.35%,为典型高硫铝土矿;主要有用矿物为一水硬铝石,主要脉石矿物为伊利石、绢云母、黄铁矿等,一水硬铝石与硅酸盐矿物共伴生关系复杂,常包含微细粒黄铁矿;基于密度泛函理论计算了主要矿物一水硬铝石、黄铁矿、伊利石的弹性性质,三种矿物均呈脆性且非中心受力,受到外力容易破碎,黏土矿物伊利石的弹性模量远小于黄铁矿和一水硬铝石,硬度及耐磨性差,且伊利石各向异性程度更深,更易形成裂缝。说明磨矿过程中,伊利石相对易磨从而优先解离,一水硬铝石和黄铁矿硬度接近,需要细磨才能充分解离。上述结论有助于深入了解铝土矿的矿物特性,并为该类型高硫铝土矿的开发利用提供参考。 展开更多
关键词 高硫铝土矿 矿物特性 密度泛函理论 弹性性质
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