Query：
学者姓名：旷戈
Refining：
Year
Type
Indexed by
Source
Complex
Co-
Language
Clean All
Abstract ：
采用空气—双氧水联合氧化工艺选择性浸出废磷酸铁锂材料（废磷酸铁锂电池正极材料粉末）中的锂，经沉锂后以碳酸锂的形式回收。实验结果表明，在液固比为4 mL/g、H_2SO_4与Li的摩尔比为0.5、搅拌转速为250r/min、反应温度为50℃的条件下空气曝气300 min，再于相同反应温度和搅拌转速下滴加H_2O_2(H_2O_2与Li的摩尔比为0.29）反应120 min，锂、铁和磷的浸出率分别为93.47%、17.26%和19.83%。该工艺较单独双氧水氧化工艺可减少75%以上的双氧水用量，大幅降低了回收成本。溶解氧浓度对浸出体系中Fe~(3+)的存在方式有重要影响：在较高浓度（通空气）下以磷酸铁为主；在较低浓度（未通空气但接触空气）下以氢氧化铁为主。
Keyword ：
废磷酸铁锂电池 废磷酸铁锂电池 碳酸锂 碳酸锂 空气氧化 空气氧化 选择性浸出 选择性浸出
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | 刘慧勇 , 杨茜 , 傅云晗 et al. 空气—双氧水联合氧化工艺选择性浸出废磷酸铁锂材料中的锂 [J]. | 化工环保 , 2024 , 44 (02) : 235-241 . |
| MLA | 刘慧勇 et al. "空气—双氧水联合氧化工艺选择性浸出废磷酸铁锂材料中的锂" . | 化工环保 44 . 02 (2024) : 235-241 . |
| APA | 刘慧勇 , 杨茜 , 傅云晗 , 母家林 , 旷戈 . 空气—双氧水联合氧化工艺选择性浸出废磷酸铁锂材料中的锂 . | 化工环保 , 2024 , 44 (02) , 235-241 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
Micron-sized Si-based materials have attracted extensive attention for lithium-ion batteries due to their high theoretical capacity and low cost. However, its large volume expansion and low conductivity limit its further development. Here, a Si/ZnS anode material is prepared, in which ZnS nanoparticles are uniformly attached to the surface of micro-Si particles. The conversion reaction of ZnS generates metal Zn and Li2S, and the alloying reaction of Zn generates LixZn, the metal Zn and LixZn are used as conductive additives to improve the conductivity of the composites, while Li2S is used as an artificial solid electrolyte interfacial phase to promote the stability of the solid electrolyte interface of the composites, so that the prepared micron-sized Si-based anode exhibits excellent cycling stability. At a current density of 0.5 A g-1, the initial coulombic efficiency reaches 78.67 % and the discharge specific capacity is 1540.2 mAh g-1 after 200 cycles.
Keyword ：
Anode material Anode material lithium-ion batteries lithium-ion batteries Micron-sized silicon particles Micron-sized silicon particles ZnS ZnS
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Zhang, Yong , Zhang, Yijin , Deng, Qingsong et al. Improving the performance of lithium-ion batteries by micron-sized silicon particles coated with nano-ZnS anode materials [J]. | JOURNAL OF ENERGY STORAGE , 2024 , 81 . |
| MLA | Zhang, Yong et al. "Improving the performance of lithium-ion batteries by micron-sized silicon particles coated with nano-ZnS anode materials" . | JOURNAL OF ENERGY STORAGE 81 (2024) . |
| APA | Zhang, Yong , Zhang, Yijin , Deng, Qingsong , Kuang, Ge , Lin, Rongying . Improving the performance of lithium-ion batteries by micron-sized silicon particles coated with nano-ZnS anode materials . | JOURNAL OF ENERGY STORAGE , 2024 , 81 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
本发明公开了一种粗制碳酸锂石灰苛化碳化生产高纯碳酸锂的方法，包括步骤：1)将粗制碳酸锂加水除去可溶盐，分离的固体与水、生石灰搅拌反应，固液分离得到氢氧化锂溶液；2)浓缩；3)浓缩液中加入除杂剂搅拌反应，固液分离得到精制液；4)一部分精制液吸收二氧化碳碳化后过滤，获得碳酸氢锂溶液；5)碳酸氢锂溶液与另一部分精制液混合反应，得到高纯级碳酸锂。本发明将传统的氢氧化锂吸收二氧化碳的碳化沉锂的气—液反应过程转化成了液—液反应，可增大溶液中杂质的容忍度，结晶温和，易于控制产品纯度和粒度，不易形成杂质的包裹，减少了洗涤工序，省去了离子交换和碳酸氢锂热解的工序，使投资费用和蒸发负荷大大降低，能够实现较大利润。
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | 旷戈 , 姜昀 , 郑芳妍 et al. 一种粗制碳酸锂石灰苛化碳化生产高纯碳酸锂的方法 : CN202111561905.2[P]. | 2021-12-20 00:00:00 . |
| MLA | 旷戈 et al. "一种粗制碳酸锂石灰苛化碳化生产高纯碳酸锂的方法" : CN202111561905.2. | 2021-12-20 00:00:00 . |
| APA | 旷戈 , 姜昀 , 郑芳妍 , 刘粤 , 李延鹤 , 刘慧勇 . 一种粗制碳酸锂石灰苛化碳化生产高纯碳酸锂的方法 : CN202111561905.2. | 2021-12-20 00:00:00 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
本发明公开了一种沉锂母液冷冻除芒硝回收碳酸锂的方法，包括以下步骤：1.闪蒸降温、2.碳化冷冻析晶、3.热解析锂。本发明的有益效果为 : 通过向沉锂母液中加入二氧化碳与硫酸钠，使沉锂母液中的碳酸根离子碳化后确保闪蒸与冷冻过程中由于溶液中锂浓度提高导致形成碳酸锂沉淀造成锂离子损失的现象不会发生，而且回收碳酸锂的过程仅加入了廉价的二氧化碳，回收碳酸锂过程成本低，过程简单，经济效益可观，适合工业生产。
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | 旷戈 , 刘粤 , 李延鹤 et al. 一种沉锂母液碳化冷冻除芒硝回收碳酸锂的方法 : CN202111344132.2[P]. | 2021-11-15 00:00:00 . |
| MLA | 旷戈 et al. "一种沉锂母液碳化冷冻除芒硝回收碳酸锂的方法" : CN202111344132.2. | 2021-11-15 00:00:00 . |
| APA | 旷戈 , 刘粤 , 李延鹤 , 姜昀 , 郑芳妍 , 刘慧勇 . 一种沉锂母液碳化冷冻除芒硝回收碳酸锂的方法 : CN202111344132.2. | 2021-11-15 00:00:00 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
本发明公开了一种硫酸锂溶液吸附碳化制备高纯碳酸锂的方法，包括以下步骤：先将硫酸锂溶液、硫酸与偏铝酸钠浆料混合搅拌沉锂，过滤得到滤渣和滤液；再将滤渣加水配浆，并将浆液加入碳化反应槽，通入CO2气体反应，过滤得到氢氧化铝和碳酸氢锂溶液；然后将碳酸氢锂溶液进行热解获得高纯碳酸锂。本发明将硫酸锂溶液加入到铝酸钠溶液中，使Li+与Al(OH)4−反应生成LiXA1Y(OH)(3Y+X)∙nH2O复盐沉淀，进行沉锂，再经过碳化工艺除去不溶杂质、氢氧化铝、钠、硫酸根等，得到高纯级碳酸锂，不需离子交换，原料消耗少且来源广，滤渣循环利用，成本低廉，具有成本与技术经济优势。
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | 旷戈 , 姜昀 , 刘粤 et al. 一种硫酸锂溶液吸附碳化制备高纯碳酸锂的方法 : CN202111427276.4[P]. | 2021-11-29 00:00:00 . |
| MLA | 旷戈 et al. "一种硫酸锂溶液吸附碳化制备高纯碳酸锂的方法" : CN202111427276.4. | 2021-11-29 00:00:00 . |
| APA | 旷戈 , 姜昀 , 刘粤 , 郑芳妍 , 李延鹤 , 刘慧勇 . 一种硫酸锂溶液吸附碳化制备高纯碳酸锂的方法 : CN202111427276.4. | 2021-11-29 00:00:00 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
针对当前由粉煤灰制备氧化铝成本高、除杂难度大等问题，提出了以富铝粉煤灰为原料的硫酸加压浸取、钾明矾结晶净化、钾明矾热解生产氧化铝的新技术路线，并对关键环节进行了热力学分析和试验验证。结果表明：该技术路线可实现低物料消耗、低能耗浸出，高效地解决从复杂硫酸盐溶液中分离铝的问题，并实现了反应过程所需硫酸、硫酸钾以及过量硫酸的循环利用。通过与传统拜耳法生产氧化铝工艺对比，本文所述技术路线理论能耗和物料消耗更低、原料来源更广泛，展现了高硅富铝粉煤灰酸法生产氧化铝新工艺的广阔应用前景。
Keyword ：
氧化铝 氧化铝 热解 热解 粉煤灰 粉煤灰 酸法 酸法 钾明矾 钾明矾
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | 王鹏 , 刘慧勇 , 黄海 et al. 基于钾明矾结晶热解的粉煤灰酸法生产氧化铝 [J]. | 中国有色金属学报 , 2022 , 32 (02) : 509-519 . |
| MLA | 王鹏 et al. "基于钾明矾结晶热解的粉煤灰酸法生产氧化铝" . | 中国有色金属学报 32 . 02 (2022) : 509-519 . |
| APA | 王鹏 , 刘慧勇 , 黄海 , 旷戈 , 李欢 . 基于钾明矾结晶热解的粉煤灰酸法生产氧化铝 . | 中国有色金属学报 , 2022 , 32 (02) , 509-519 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
The production of aluminium oxide from coal flay ash, an aluminum-rich and silicate-based solid waste, has been found uneconomic, particularly due to the great challenge for impurity removal. The present study proposes a new process to recover aluminum oxide from coal fly ash using pressure leaching with sulfuric acid, followed by crystallization and pyrolysis of potassium-alum. The thermodynamic and experimental analyses results show the feasibility of obtaining metallurgical-grade aluminum oxide using the new process, with low reagent and energy consumption. In the process, the separation of aluminum from the complicated sulfate leachate can be achieved efficiently. The excess sulfuric acid, potassium sulfate and oxy-sulfide (obtained from pyrolysis) can all be recycled for reused. The comparisons between the new process and the traditional Bayer process indicate that the new process for aluminum oxide production from aluminum-rich and silicate-based materials has a wide application. © 2022, China Science Publishing & Media Ltd. All right reserved.
Keyword ：
Alumina Alumina Aluminum oxide Aluminum oxide Aluminum sulfate Aluminum sulfate Coal Coal Coal ash Coal ash Energy utilization Energy utilization Fly ash Fly ash Potash Potash Pyrolysis Pyrolysis Sulfur compounds Sulfur compounds Sulfuric acid Sulfuric acid
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Wang, Peng , Liu, Hui-Yong , Huang, Hai et al. Production of aluminum oxide from coal fly ash by acidic method based on crystallization and pyrolysis of potassium-alum [J]. | Chinese Journal of Nonferrous Metals , 2022 , 32 (2) : 509-519 . |
| MLA | Wang, Peng et al. "Production of aluminum oxide from coal fly ash by acidic method based on crystallization and pyrolysis of potassium-alum" . | Chinese Journal of Nonferrous Metals 32 . 2 (2022) : 509-519 . |
| APA | Wang, Peng , Liu, Hui-Yong , Huang, Hai , Kuang, Ge , Li, Huan . Production of aluminum oxide from coal fly ash by acidic method based on crystallization and pyrolysis of potassium-alum . | Chinese Journal of Nonferrous Metals , 2022 , 32 (2) , 509-519 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
An acidic mixture of sulfuric and fluosilicic acid (H2SO4+H2SiF6) was employed as lixiviant to enhance leaching of lithium from lepidolite. The H2SiF6 was obtained as a byproduct of anhydrous hydrofluoric acid production, aiming to provide HF molecules. It was found that the HF molecules were the main reaction component and played a key role in strengthening the dissolution of lepidolite. Different factors, including mass ratio of ore/H2SO4+H2SiF6, concentrations of H2SO4 and H2SiF6, leaching temperatures (40-80 degrees C) and time (15-75 min), were investigated. Moreover, an efficient tubular reactor was employed to improve this acid leaching system. Under the optimal conditions (ore/H2SO4+H2SiF6 mass ratio of 1:0.8:1.6, 80 wt.% H2SO4, 15 wt.% H2SiF6, 80 degrees C, 15 min), 97.9% of Li, 96.4% of K, 97.6% of Rb, 96.7% of Cs and 81.4% of Al (mass fraction) were leached. Additionally, a two-step thermal process was proposed to remove fluorine of leaching slurry. This acid treatment using an acidic mixture of H2SO4 and H2SiF6 in a continuous tubular reactor shows potential as an alternative process to extract lithium from lepidolite.
Keyword ：
continuous tubular reactor continuous tubular reactor fluorine chemical method fluorine chemical method fluosilicic acid fluosilicic acid lepidolite lepidolite lithium extraction lithium extraction
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Guo, Hui , Kuang, Ge , Li, Huan et al. Enhanced lithium leaching from lepidolite in continuous tubular reactor using H2SO4+H2SiF6 as lixiviant [J]. | TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA , 2021 , 31 (7) : 2165-2173 . |
| MLA | Guo, Hui et al. "Enhanced lithium leaching from lepidolite in continuous tubular reactor using H2SO4+H2SiF6 as lixiviant" . | TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 31 . 7 (2021) : 2165-2173 . |
| APA | Guo, Hui , Kuang, Ge , Li, Huan , Pei, Wen-tao , Wang, Hai-dong . Enhanced lithium leaching from lepidolite in continuous tubular reactor using H2SO4+H2SiF6 as lixiviant . | TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA , 2021 , 31 (7) , 2165-2173 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
采用硫酸(H_2SO_4)和氟硅酸(H_2SiF_6)的混酸浸出剂强化锂云母中锂的浸出。氟硅酸(H_2SiF_6)作为氢氟酸的副产物,可以提供反应所需的氟化氢(HF)分子。而氟化氢是氟硅酸实际参与反应的主要成分,对锂的强化溶出具有关键作用。探究矿石/硫酸/氟硅酸质量比、硫酸和氟硅酸浓度、浸出温度(40～80℃)、浸出时间(15～75 min)等因素对锂浸出的影响。采用连续管式反应器进一步强化酸浸体系。确定酸浸最优条件为:矿石/H_2SO_4/H_2Si F_6质量比1:0.8:1.6、H_2SO_4浓度80%(质量分数)、H_2Si F_6浓度15%(质量分数),97.9%的锂、96.4%的钾...
Keyword ：
提锂 提锂 氟化学法 氟化学法 氟硅酸 氟硅酸 连续管式反应器 连续管式反应器 锂云母 锂云母
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | 郭慧 , 旷戈 , 李欢 et al. 锂云母连续管式反应器中混酸H_2SO_4+H_2SiF_6体系强化溶出锂（英文） [J]. | Transactions of Nonferrous Metals Society of China , 2021 , 31 (07) : 2165-2173 . |
| MLA | 郭慧 et al. "锂云母连续管式反应器中混酸H_2SO_4+H_2SiF_6体系强化溶出锂（英文）" . | Transactions of Nonferrous Metals Society of China 31 . 07 (2021) : 2165-2173 . |
| APA | 郭慧 , 旷戈 , 李欢 , 裴文涛 , 王海东 . 锂云母连续管式反应器中混酸H_2SO_4+H_2SiF_6体系强化溶出锂（英文） . | Transactions of Nonferrous Metals Society of China , 2021 , 31 (07) , 2165-2173 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
Considering that 2%-8% F contained in lepidolite, an improved sulfuric acid method with introducing fluorine additives has been proposed to enhance its lithium extraction. Herein, an acid mixture of hydrofluoric acid and sulfuric acid (HF/H2SO4) was employed to theoretically investigate the dissolution mechanism due to that the HF molecules are the real reactive components of the fluorine additives. A stepwise heat treatment for fluorine removal has been proposed based on the different boiling point of HF-H2O and H2SO4-H2O subsystems of the acid leaching solution. Effects of heating temperature (200 degrees C-350 degrees C), heating time (6 h, 12 h), initial ratio of ore/H2SO4 (1:1.5-1:3.5 g/mL) and different heating style (one step or stepwise) on fluorine removal and lithium recovery have been carried out. Based on the elemental and composition analysis of liquid and corresponding solid phase, an optimal condition for fluorine removal was established: about 0.68% fluorine remained in leaching slurry after the stepwise heat treatment at 120 degrees C for 3 h and 200 degrees C for 6 h with initial ratio ore/HF/H2SO4 of 1:2:2 g/mL. The retention of Li was remained at a relatively high level as 94.26%. The resulted siliceous residues and undissolved quartz indicates that selective leaching of Li was achieved during this stepwise heat treatment, which is beneficial for subsequent purification and lithium production.
Keyword ：
Fluorine removal Fluorine removal Hydrofluoric acid Hydrofluoric acid Lepidolite Lepidolite Lithium extraction Lithium extraction Stepwise heat treatment Stepwise heat treatment
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Guo, Hui , Lv, Menghua , Kuang, Ge et al. Stepwise heat treatment for fluorine removal on selective leachability of Li from lepidolite using HF/H2SO4 as lixiviant [J]. | SEPARATION AND PURIFICATION TECHNOLOGY , 2021 , 259 . |
| MLA | Guo, Hui et al. "Stepwise heat treatment for fluorine removal on selective leachability of Li from lepidolite using HF/H2SO4 as lixiviant" . | SEPARATION AND PURIFICATION TECHNOLOGY 259 (2021) . |
| APA | Guo, Hui , Lv, Menghua , Kuang, Ge , Cao, Yijun , Wang, Haidong . Stepwise heat treatment for fluorine removal on selective leachability of Li from lepidolite using HF/H2SO4 as lixiviant . | SEPARATION AND PURIFICATION TECHNOLOGY , 2021 , 259 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Export
| Results： |
Selected to |
| Format： |
