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Extraction of lithium from the simulated pyrometallurgical slag of spent lithium-ion batteries by binary eutectic molten carbonates

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International Journal of Minerals,Metallurgy and Materials 2022年第9期29卷 1715-1721页

作者： Hui Dang zhidong chang Hualei Zhou Sihang Ma Min Li Jialing Xiang Department of Chemistry and Chemical Engineering School of Chemistry and Biological EngineeringUniversity of Science and Technology BeijingBeijing 100083China

The effective and low-temperature extraction of lithium from the pyrometallurgical slag of spent lithium-ion batteries(LIBs)remains a great ***,potassium carbonate/sodium carbonate(K_(2)CO_(3)/Na_(2)CO_(3)),which could form a eutectic molten salt system at 720℃,was used as a roasting agent to extract lithium from pyrometallurgical *** was successfully extracted from the slag by K_(2)CO_(3)/Na_(2)CO_(3) roasting followed by water *** calculation results indicate that the lengths of Li-O bonds increase after K^(+)/Na^(+)adsorption,resulting in the easy release of Li^(+)from the LiAlSi_(2)O_(6) lattice after roasting with K_(2)CO_(3)/Na_(2)CO_(3).Thermogravimetry-differential scanning calorimetry results indicate that the eutectic phenomenon of K_(2)CO_(3) and Na_(2)CO_(3) could be observed at 720℃ and that the reaction of the slag and eutectic molten salts occurs at temperatures above 720℃.X-ray diffraction results suggest that Li^(+)in the slag is exchanged by K^(+)in K_(2)CO_(3) with the concurrent formation of KAlSiO_(4),while Na_(2)CO_(3) mainly functions as a fluxing *** lithium extraction efficiency can reach 93.87%under the optimal conditions of a roasting temperature of 740℃,roasting time of 30 min,leaching temperature of 50℃,leaching time of 40 min,and water/roasted sample mass ratio of 10:*** work provides a new system for extracting lithium from the pyrometallurgical slag of spent LIBs.

关键词： spent lithium-ion battery lithium recovery silicate structure low roasting temperature binary eutectic carbonates roasting

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Preparation,characterization of Mo,Ag-loaded BiVO_4 and comparison of their degradation of methylene blue

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Science China Chemistry 2012年第9期55卷 1770-1775页

作者： LIU KunJie chang zhidong LI WenJun CHE Ping ZHOU HuaLei Department of Chemistry and Chemical Engineering School of Chemical and Biological EngineeringUniversity of Science and Technology BeijingBeijing 100083China

Two types of metal-loaded visible-light-driven photocatalysts,Mo-BiVO4and Ag-BiVO4,were synthesized by wet impregnation *** poperties were characterized by UV-vis diffuse reflectance spectroscopy,X-ray diffraction,field emission scanning electron microscopy,X-ray photoelectron spectroscopy and low temperature nitrogen *** activity of the obtained materials was investigated through degrading methylene blue(MB) solution under visible-light *** results reveal that both metal loaded-BiVO4catalysts have monoclinic scheelite *** and Ag exist as oxides on the surface of the *** changes of absorption in visible-light region,band gap(E g) and specific surface area(A BET) caused by loading Ag are more obvious than those caused by loading *** the isoelectric point of Ag-BiVO4decreases less than that of *** catalysts show higher photocatalytic activity than pure BiVO4,resulting in the significantly improved efficiency of degradation of *** the degradation efficiency of these two metal-loaded BiVO4photocatalysts is similar to each ***,mechanisms of such enhancement are *** decrease of isoelectric point helps Mo-BiVO4improve the degradation *** for Ag-BiVO4,the augmentation of absorption in visible-light region as well as the abatement of E g plays more important roles.

关键词： Mo-BiVO4 Ag-BiVO4 visible light photocatalyst isoelectric point

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Preferentially selective extraction of lithium from spent LiCoO_(2)cathodes by medium-temperature carbon reduction roasting

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International Journal of Minerals,Metallurgy and Materials 2024年第2期31卷 315-322页

作者： Daixiang Wei Wei Wang Longjin Jiang zhidong chang Hualei Zhou Bin Dong Dekun Gao Minghui Zhang Chaofan Wu School of Chemistry and Biological Engineering University of Science and Technology BeijingBeijing 100083China State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China Anhui Chaoyue Environmental Protection Technology Co. LtdChuzhou 239060China Anhui Huihong Technology Co. LtdChuzhou 239060China

Lithium recovery from spent lithium-ion batteries(LIBs)have attracted extensive attention due to the skyrocketing price of *** medium-temperature carbon reduction roasting was proposed to preferential selective extraction of lithium from spent Li-CoO_(2)(LCO)cathodes to overcome the incomplete recovery and loss of lithium during the recycling *** LCO layered structure was destroyed and lithium was completely converted into water-soluble Li2CO_(3)under a suitable temperature to control the reduced state of the cobalt *** Co metal agglomerates generated during medium-temperature carbon reduction roasting were broken by wet grinding and ultrasonic crushing to release the entrained *** results showed that 99.10%of the whole lithium could be recovered as Li2CO_(3)with a purity of 99.55%.This work provided a new perspective on the preferentially selective extraction of lithium from spent lithium batteries.

关键词： spent LiCoO_(2)cathodes medium-temperature carbon reduction lithium extraction priority crystal transformation macro-scopic transport resistance

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Crystallization of battery-grade lithium carbonate with high recovery rate via solid-liquid reaction

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Particuology 2024年第9期92卷 95-105页

作者： Chaofan Wu Longjin Jiang Wei Wang Bin Dong zhidong chang Daixiang Wei Hira Anwar Minghui Zhang Dekun Gao School of Chemistry and Biological Engineering University of Science and Technology BeijingBeijing100083China Anhui Chaoyue Environmental Protection Technology Co. LtdChuzhou239060China State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing100190China Anhui Huihong Technology Co. LtdChuzhou239060China

Lithium carbonate(Li_(2)CO_(3))stands as a pivotal raw material within the lithium-ion battery ***,we propose a solid-liquid reaction crystallization method,employing powdered sodium carbonate instead of its solution,which minimizes the water introduction and markedly elevates one-step lithium recovery *** kinetic calculations,the Li_(2)CO_(3)solid-liquid reaction crystallization process conforms by the Avrami equation rather than shrinking core model,which means the dissolution rate of Na_(2)CO_(3)is the most important factor affecting the reaction *** effects of reaction conditions such as temperature and stirring speed on the Li_(2)CO_(3)precipitation behavior were *** results indicated that temperature is a most essential parameter than other reaction conditions or stirring *** exceptional 93%recovery of Li_(2)CO_(3)at 90℃with a remarkable purity of 99.5%was achieved by using 1.2 M ratio of Na_(2)CO_(3)/Li_(2)SO_(4).This method provides a new idea for the efficient preparation of battery-grade Li_(2)CO_(3).

关键词： Lithium recovery Lithium sulfate Reaction crystallization Battery-grade lithium carbonate

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Na_(2)SO_(4)-NaCl binary eutectic salt roasting to enhance extraction of lithium from pyrometallurgical slag of spent lithium-ion batteries

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Chinese Journal of Chemical Engineering 2022年第1期35卷 294-300页

作者： Hui Dang zhidong chang Xue Wu Sihang Ma Yifei Zhan Na Li Wenbo Liu Wenjun Li Hualei Zhou changyan Sun Department of Chemistry and Chemical Engineering School of Chemistry and Biological EngineeringUniversity of Science and Technology BeijingBeijing 100083China Institute of Biophysics Chinese Academy of SciencesBeijing 100101China

Effectively extracting lithium at a relatively low temperature from the slag produced by the pyrometallurgical treatment of spent lithium-ion batteries remains a great challenge,which limits the acquirement of ***,we proposed a eutectic system to roast slag at a lower temperature based on sodium sulfate-sodium chloride(Na_(2)SO_(4)-NaCl)binary eutectic *** optimal roasting conditions are as follows:the slag was roasted at 750℃with a(SO_(4)^(2-)+Cl^(-))/Li+molar ratio of 5:1 for 120 *** by aqueous leaching 5 min at room temperature with a water/roasted samples mass ratio of 30:1,it can get 97.07%lithium extraction efficiency.

关键词： Spent lithium-ion battery Lithium recovery Silicate structure Binary eutectic salt roasting

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具有开放几何特征钣金件渐进成形的回弹控制与补偿

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中国机械工程 2020年第22期31卷 2723-2727页

作者：李铭代培培常志东陈军上海交通大学模具CAD国家工程研究中心上海200030 上海交通大学塑性成形技术与装备研究院上海200030 上海模具技术研究所(有限公司) 上海200030

实现了具有开放几何特征钣金件的渐进成形。提出采用工艺参数优化、多道次渐进成形和轨迹补偿等方法提高钣金件的几何精度。设计了多道次渐进成形方法的中间构型,目的在于增大材料塑性变形并减小几何偏差。采用层切法轮廓轨迹形成两道... 详细信息

实现了具有开放几何特征钣金件的渐进成形。提出采用工艺参数优化、多道次渐进成形和轨迹补偿等方法提高钣金件的几何精度。设计了多道次渐进成形方法的中间构型,目的在于增大材料塑性变形并减小几何偏差。采用层切法轮廓轨迹形成两道次成形中第一道次的构型,为了防止第一道次成形时出现破裂,将非固定方向的成形角度设定为75°,第二道次将非固定方向的板料完全成形。采用基于几何补偿的两道次渐进成形方法可以将开放几何特征钣金件的几何偏差控制在0.5 mm左右。

关键词：板料渐进成形开放几何特征工艺参数优化多道次渐进成形几何补偿

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大菱鲆全人工繁育模拟系统研究

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计算机时代 2018年第3期 4-8页

作者：常志东威海海洋职业学院信息工程系山东威海265300

大菱鲆人工繁育在国内已经拥有了较好的技术基础和产业优势,大菱鲆养殖产业也成为中国北方海水养殖的支柱产业。高等职业院校在进行大菱鲆人工繁育技术传授时,受场地、时间、人数等条件限制,难以开展有效的实践教学。大菱鲆全人工繁育... 详细信息

大菱鲆人工繁育在国内已经拥有了较好的技术基础和产业优势,大菱鲆养殖产业也成为中国北方海水养殖的支柱产业。高等职业院校在进行大菱鲆人工繁育技术传授时,受场地、时间、人数等条件限制,难以开展有效的实践教学。大菱鲆全人工繁育模拟系统,是借助计算机技术、软件技术和计算机网络技术,将复杂的过程进行分解,并将分解后的任务通过软件进行模拟,通过完成任务,重现整个繁育过程,让学生系统地掌握技术要点。系统开发采用了***+SQL Server技术,这两项技术成熟、稳定,在许多应用系统的开发中使用。

关键词：大菱鲆人工繁育实践教学计算机软件模拟过程模拟影响因素模拟

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Nonfoaming Bubble Separation for Recovery of Butyl Acetate from Discharged Wastewater During Penicillin Production

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Chinese Journal of Chemical Engineering 2005年第3期13卷 329-333页

作者：孙兴华常志东胡欣申淑锋刘会洲 Laboratory of Separation Science and EngineeringState Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100080China Graduate School of the Chinese Academy of SciencesBeijing 100080China Laboratory of Separation Science and EngineeringState Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100080China

Two nonfoaming bubble separation techniques, air stripping and solvent sublation, are presented and discussed in order to recover butyl acetate (BA) from discharged wastewater after solvent extraction of penicillin. Results show air stripping is not suitable for the recovery of BA from the wastewater. Axial concentration of BA had a noted maximum point along the column. In contrast, solvent sublation is very effective to recover BA from the wastewater. In solvent sublation experiments, axial concentration of BA along the column first increased and then decreased from the bottom to the top because of two primary mass transport processes. One is the transport by adsorption or attachment to ascending bubbles, and the other is by dispersion at water-solvent interface and by water film in organic solvent layer. In order to elucidate the high removal efficiency in solvent sublation, the microstructure of the wastewater was studied with optic microscope, which was showed to be an emulsion of BA in water at large concentration of BA. Solvent sublation can be successfully used in the removal of BA from its emulsion in the wastewater. The surface tension of simulated solution composed of lysozyme and BA was studied to understand mutual effect of biological materials and BA. Results show that lysozyme affects the adsorption of BA at air-water interface and they may form a complex between BA and lysozyme molecules.

关键词： bubble separation air stripping solvent sublation butyl acetate wastewater emulsion

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黄河沿线9省区水土资源生态承载力耦合协调分析

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水资源保护 2023年第6期39卷 121-129页

作者：赵子萌曹永强常志冬王菲辽宁师范大学地理科学学院辽宁大连116029 天津师范大学京津冀生态文明发展研究院天津300387

基于生态足迹模型探讨了黄河沿线9省区水土资源生态足迹和生态承载力时空变化特征,借助耦合协调度模型定量分析了当前水土资源生态承载力协调状况,并进行了耦合协调等级划分。结果表明:2006—2020年9省区人均水资源生态足迹呈下降趋势,... 详细信息

基于生态足迹模型探讨了黄河沿线9省区水土资源生态足迹和生态承载力时空变化特征,借助耦合协调度模型定量分析了当前水土资源生态承载力协调状况,并进行了耦合协调等级划分。结果表明:2006—2020年9省区人均水资源生态足迹呈下降趋势,在0.70~0.78 hm^(2)之间,省区间水资源生态状况差距明显,除四川、青海、陕西3省外,其余6省区均处于水资源不可持续发展状态;2006—2020年9省区人均土地资源生态足迹呈显著上升趋势,在2.87~5.13 hm^(2)之间,土地资源生态状况空间上存在较大差异,除山东、四川和陕西3省外,其余6省区土地资源均处于不可持续发展状态;9省区水土资源生态承载力耦合协调度在0.2~0.6之间,多数省区处于失调状态;总体来看,9省区水土资源生态状况较差,应高度重视水土资源的协调发展。

关键词：生态足迹水土资源生态承载力耦合协调黄河沿线9省区

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泡沫分离回收水中低浓度磷酸三丁酯

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化工冶金 1999年第2期20卷 125-128页

作者：常志东姚宁刘会洲陈家镛中国科学院化工冶金研究所分离科学与工程青年实验室北京100080

以吐温系列表面活性剂采用泡沫法回收水中的微量磷酸三丁酯．实验结果表明，在本实验条件下，泡沫法可以回收水中的磷酸三丁酯，磷酸三丁酯的提浓率与残留率与起始磷酸三丁酯浓度、起始表面活性剂浓度和表面活性剂种类有关。

关键词：泡沫分离磷酸三丁酯吐温表面活性剂

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