Dissolution Kinetics of Magnesium from Calcined Serpentine in NH4Cl Solution
文献类型：期刊论文
| 作者 | Gao, Wencheng1,2; Wen, Jiankang2; Li, Zhibao1 |
| 刊名 | INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
 |
| 出版日期 | 2014-05-14 |
| 卷号 | 53期号:19页码:7947-7955 |
| 关键词 | WASTE SERPENTINE ACID DIGESTION CARBONATION MINERALS BEHAVIOR SEQUESTRATION SILICON |
| ISSN号 | 0888-5885 |
| 其他题名 | Ind. Eng. Chem. Res. |
| 中文摘要 | A process of extracting magnesium from serpentine to produce Mg compounds by using recyclable NH3 was proposed. This process includes calcination of serpentine; dissolution of magnesium by NH4Cl leaching to obtain NH3 and MgCl2-rich solution, and precipitation of Mg(OH)(2) from refined MgCl2-rich solution by feeding NH3. The effects of various factors, such as roasting temperature and time, particle size, concentration of NH4Cl solution, solid-to-liquid ratio, and leaching temperature, on the dissolution kinetics of magnesium of the calcined serpentine were comprehensively investigated. It is found that the extraction rate of magnesium was enhanced by the removal of NH3 generated from the reaction system. Thus, the obtained optimum conditions for magnesium extraction from serpentine are a roasting temperature of 700 degrees C, a roasting time of 1 h, a particle size fraction of -0.20 + 0.10 mm, an initial ammonium chloride concentration of 4.0 M, a solid-to-liquid ratio of 20/500 g/mL, and a reaction temperature of 104 degrees C. With the removal of NH3 in batch leaching study, the maximum recovery of magnesium reached 83.87%, and the concentration of magnesium was similar to 0.63 mol.L-1, satisfying the requirement of Mg(OH)(2) precipitation. Finally, the reaction kinetics of the system was successfully modeled by an empirical diffusion-like equation. The apparent activity energy was obtained to be 23.56 +/- 1.06 kJ.mol(-1). The results from this study provide the fundamentals for magnesium extraction from serpentine by NH4Cl leaching. |
| 英文摘要 | A process of extracting magnesium from serpentine to produce Mg compounds by using recyclable NH3 was proposed. This process includes calcination of serpentine; dissolution of magnesium by NH4Cl leaching to obtain NH3 and MgCl2-rich solution, and precipitation of Mg(OH)(2) from refined MgCl2-rich solution by feeding NH3. The effects of various factors, such as roasting temperature and time, particle size, concentration of NH4Cl solution, solid-to-liquid ratio, and leaching temperature, on the dissolution kinetics of magnesium of the calcined serpentine were comprehensively investigated. It is found that the extraction rate of magnesium was enhanced by the removal of NH3 generated from the reaction system. Thus, the obtained optimum conditions for magnesium extraction from serpentine are a roasting temperature of 700 degrees C, a roasting time of 1 h, a particle size fraction of -0.20 + 0.10 mm, an initial ammonium chloride concentration of 4.0 M, a solid-to-liquid ratio of 20/500 g/mL, and a reaction temperature of 104 degrees C. With the removal of NH3 in batch leaching study, the maximum recovery of magnesium reached 83.87%, and the concentration of magnesium was similar to 0.63 mol.L-1, satisfying the requirement of Mg(OH)(2) precipitation. Finally, the reaction kinetics of the system was successfully modeled by an empirical diffusion-like equation. The apparent activity energy was obtained to be 23.56 +/- 1.06 kJ.mol(-1). The results from this study provide the fundamentals for magnesium extraction from serpentine by NH4Cl leaching. |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Engineering, Chemical |
| 研究领域[WOS] | Engineering |
| 关键词[WOS] | WASTE SERPENTINE ; ACID DIGESTION ; CARBONATION ; MINERALS ; BEHAVIOR ; SEQUESTRATION ; SILICON |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000336078500015 |
| 公开日期 | 2014-08-28 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/10905]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China 2.Gen Res Inst Nonferrous Met, Natl Engn Lab Biohydromet, Beijing 100088, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gao, Wencheng,Wen, Jiankang,Li, Zhibao. Dissolution Kinetics of Magnesium from Calcined Serpentine in NH4Cl Solution[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2014,53(19):7947-7955. |
| APA | Gao, Wencheng,Wen, Jiankang,&Li, Zhibao.(2014).Dissolution Kinetics of Magnesium from Calcined Serpentine in NH4Cl Solution.INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,53(19),7947-7955. |
| MLA | Gao, Wencheng,et al."Dissolution Kinetics of Magnesium from Calcined Serpentine in NH4Cl Solution".INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 53.19(2014):7947-7955. |
入库方式： OAI收割
来源：过程工程研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。