Desilication of synthetic Bayer liquor with calcium sulfate dihydrate: Kinetics and modelling
文献类型：期刊论文
| 作者 | Ma, Jiayu; Zhai, Kunming; Li, Zhibao |
| 刊名 | HYDROMETALLURGY
 |
| 出版日期 | 2011-04-01 |
| 卷号 | 107期号:1-2页码:48-55 |
| 关键词 | Desilication kinetics Modelling Calcium sulfate dihydrate Bayer process Characterization |
| ISSN号 | 0304-386X |
| 通讯作者 | Li, ZB |
| 英文摘要 | The desilication kinetics of synthetic Bayer liquor by use of calcium sulfate dihydrate (CaSO4 center dot 2H(2)O) was studied experimentally and modelled mathematically. Temperature, initial silica concentration, and the dosage of CaSO4 center dot 2H(2)O were found to be the main factors affecting desilication reaction. CaSO4 center dot 2H(2)O was proved to remove up to 95% silica from sodium aluminate solution under the optimum operation conditions. A surface integration kinetic model, assuming that the desilication process follows a pseudo-second-order kinetics, was developed and successfully model the experiment data of desilication process via CaSO4 center dot 2H(2)O at the range of operating conditions investigated. An activation energy of 52 kJ/mol was estimated for the desilication process with CaSO4 center dot 2H(2)O over the temperature of 80-100 degrees C. The desilication reaction products (DSP) were analyzed by XRD and SEM, and found to be mainly Hauyne (3Na(2)O center dot 2CaSO(4)center dot 3Al(2)O(3)center dot 6SiO(2)) and Lazurite (3Na(2)O center dot CaSO4 center dot 0.5Na(2)SO(4)center dot 3Al(2)O(3)center dot 6SiO(2)). The final sulfate concentration in the liquor after desilication with CaSO4 center dot 2H(2)O was similar to 0.021 g/L. (C)0 2011 Elsevier B.V. All rights reserved. |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Metallurgy & Metallurgical Engineering |
| 研究领域[WOS] | Metallurgy & Metallurgical Engineering |
| 关键词[WOS] | ALUMINATE SOLUTIONS ; DIGESTION CONDITIONS ; DIASPORIC BAUXITE ; CRYSTAL-GROWTH ; CANCRINITE ; SODALITE ; SILICA |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000289400800007 |
| 公开日期 | 2013-11-06 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/5055]  |
| 专题 | 过程工程研究所_湿法冶金清洁生产技术国家工程实验室 |
| 作者单位 | Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ma, Jiayu,Zhai, Kunming,Li, Zhibao. Desilication of synthetic Bayer liquor with calcium sulfate dihydrate: Kinetics and modelling[J]. HYDROMETALLURGY,2011,107(1-2):48-55. |
| APA | Ma, Jiayu,Zhai, Kunming,&Li, Zhibao.(2011).Desilication of synthetic Bayer liquor with calcium sulfate dihydrate: Kinetics and modelling.HYDROMETALLURGY,107(1-2),48-55. |
| MLA | Ma, Jiayu,et al."Desilication of synthetic Bayer liquor with calcium sulfate dihydrate: Kinetics and modelling".HYDROMETALLURGY 107.1-2(2011):48-55. |
入库方式： OAI收割
来源：过程工程研究所
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