Mineral phase transition of desilicated high alumina fly ash with alumina extraction in mixed alkali solution
文献类型：期刊论文
| 作者 | Sun, Zhenhua; Li, Huiquan; Bao, Weijun; Wang, Chenye |
| 刊名 | INTERNATIONAL JOURNAL OF MINERAL PROCESSING
 |
| 出版日期 | 2016-08-10 |
| 卷号 | 153期号:AUG页码:109-117 |
| 关键词 | Desilicated high alumina fly ash Mixed alkali solution Mineral phase transition Alumina extraction NaCaHSiO4 |
| ISSN号 | 0301-7516 |
| 英文摘要 | High alumina fly ash (HAFA), a main industrial solid waste produced in increasing amounts in western China, is a type of alumina-rich resource that can replace bauxite in the preparation of alumina. A new process of alumina extraction from HAFA is proposed in this paper. This method involved the raw HAFA being treated first by a low concentration alkali solution to form desilicated HAFA and then alumina was effectively extracted from desilicated HAFA in mixed alkali solution (NaOH + Ca(OH)(2)). The effects of the reaction conditions on alumina leaching from desilicated HAFA were investigated. The extraction efficiency of alumina could reach 92.0% under the following optimal conditions: alkali to ash ratio of 6, calcium to silicate ratio of 1.0, and reaction temperature of 280 degrees C. After alumina extracted from desilicated HAFA, the solid residues were collected and characterized to better understand the mechanism of mineral phase transition of desilicated HAFA with alumina extraction in mixed alkali solution. By changing the calcium to silica ratio or alkali to ash ratio, the mineral phases could be transformed from 1.2Na(2)O center dot 0.8CaO center dot Al2O3 center dot 2SiO(2)center dot H2O to NaCaHSiO4. A relatively high alkali to ash ratio or calcium to silicate ratio was preferred for the extraction of alumina from desilicated HAFA. (C) 2016 Elsevier B.V. All rights reserved. |
| WOS标题词 | Science & Technology ; Technology ; Physical Sciences |
| 类目[WOS] | Engineering, Chemical ; Mineralogy ; Mining & Mineral Processing |
| 研究领域[WOS] | Engineering ; Mineralogy ; Mining & Mineral Processing |
| 关键词[WOS] | COAL ; CHINA |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000379634800013 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/21228]  |
| 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, Key Lab Green Proc & Engn, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun, Zhenhua,Li, Huiquan,Bao, Weijun,et al. Mineral phase transition of desilicated high alumina fly ash with alumina extraction in mixed alkali solution[J]. INTERNATIONAL JOURNAL OF MINERAL PROCESSING,2016,153(AUG):109-117. |
| APA | Sun, Zhenhua,Li, Huiquan,Bao, Weijun,&Wang, Chenye.(2016).Mineral phase transition of desilicated high alumina fly ash with alumina extraction in mixed alkali solution.INTERNATIONAL JOURNAL OF MINERAL PROCESSING,153(AUG),109-117. |
| MLA | Sun, Zhenhua,et al."Mineral phase transition of desilicated high alumina fly ash with alumina extraction in mixed alkali solution".INTERNATIONAL JOURNAL OF MINERAL PROCESSING 153.AUG(2016):109-117. |
入库方式： OAI收割
来源：过程工程研究所
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