Study of extracting alumina from high-alumina PC fly ash by a hydro-chemical process
文献类型：期刊论文
| 作者 | Ding, Jian1,2; Ma, Shuhua2; Zheng, Shili2; Zhang, Yi2; Xie, Zongli4; Shen, Shirley4; Liu, Zhongkai2,3 |
| 刊名 | HYDROMETALLURGY
 |
| 出版日期 | 2016-05-01 |
| 卷号 | 161期号:MAY页码:58-64 |
| 关键词 | Fly ash Alumina extraction Kinetics Hydro-chemical process |
| ISSN号 | 0304-386X |
| 英文摘要 | Alumina extraction from high-alumina pulverized coal (PC) fly ash by a mild hydro-chemical process characterized by a high alkaline sodium aluminate solution was studied. A high alumina extraction efficiency of 96.03% has been achieved. The effects of temperature and reaction time on alumina extraction ratio, the phase transformation and the morphology change of the extraction residues have been investigated. The alumina extracting process involves two steps: transformation from mullite and corundum to an intermediate product aluminasilicate, Na8Al6Si6O24(OH)(2)(H2O)(2), and then from the aluminasilicate to calcium sodium hydrate silicate (NaCaHSiO4). The reaction temperature has been found to be critical for the alumina extraction and especially for the decomposition of the intermediate product Na8Al6Si6O24(OH)(2)(H2O)(2) at high temperatures (>250 degrees C). With the aid of a specially designed rapid real-time sampling device, the kinetics of the decomposition of Na8Al6Si6O24(OH)(2)(H2O)(2) at high temperatures has also been studied and fitted by the Avrami-Erofeev equation. Furthermore, some engineering suggestions about the reactors design and prevention of pipe scaling have been proposed based on the kinetic results. (C) 2016 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] | THERMAL-ACTIVATION ; PHASE-CHANGE ; KINETICS ; CHINA ; DISSOLUTION ; RECOVERY ; SYSTEM |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000373542100009 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/20993]  |
| 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 | 1.Northeastern Univ, Sch Met, Shenyang 110819, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China 3.CHALCO, Zhengzhou Res Inst, Zhengzhou 450041, Peoples R China 4.CSIRO Mfg, Private Bag 10, Clayton, Vic 3169, Australia |
| 推荐引用方式 GB/T 7714 | Ding, Jian,Ma, Shuhua,Zheng, Shili,et al. Study of extracting alumina from high-alumina PC fly ash by a hydro-chemical process[J]. HYDROMETALLURGY,2016,161(MAY):58-64. |
| APA | Ding, Jian.,Ma, Shuhua.,Zheng, Shili.,Zhang, Yi.,Xie, Zongli.,...&Liu, Zhongkai.(2016).Study of extracting alumina from high-alumina PC fly ash by a hydro-chemical process.HYDROMETALLURGY,161(MAY),58-64. |
| MLA | Ding, Jian,et al."Study of extracting alumina from high-alumina PC fly ash by a hydro-chemical process".HYDROMETALLURGY 161.MAY(2016):58-64. |
入库方式： OAI收割
来源：过程工程研究所
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