Stability of 3CaO center dot Al2O3 center dot 6H(2)O in KOH+K2CO3+H2O system for chromate production
文献类型：期刊论文
| 作者 | Wang, Shaona1,2; Zheng, Shili1; Zhang, Yi1 |
| 刊名 | HYDROMETALLURGY
 |
| 出版日期 | 2008-02-01 |
| 卷号 | 90期号:2-4页码:201-206 |
| 关键词 | chromate production sub-molten KOH aluminium removal calcium aluminate decomposition 3CaO center dot AL(2)O(3)center dot 6H(2)O |
| ISSN号 | 0304-386X |
| 其他题名 | Hydrometallurgy |
| 中文摘要 | In the novel clean chromate production process, the alkali liquor recycled to decompose the chromite ore mainly consists of KOH and K2CO3 which accumulates aluminium impurity and affects the quality of the product greatly. Aluminium impurity can be removed by adding CaO to precipitate as 3CaO center dot Al2O3 center dot 6H(2)O (C(3)AH(6)). A study of the effects of various parameters, such as KOH concentration, K2CO3 concentration and temperature on the behaviour Of C(3)AH(6) show that C(3)AH(6) is decomposed to 3CaO center dot Al2O3 center dot CaCO3 center dot 11H(2)O and CaCO3 below 150 g L-1 KOH, and decomposed to Ca(OH)(2) above 150 g L-1 KOH. With K2CO3 concentration increasing, C(3)AH(6) decomposes significantly, which results in more CaCO3 or 3CaO center dot Al2O3 center dot CaCO3 center dot 11H(2)O produced. Temperature has a large positive effect on the decomposition of C(3)AH(6) at 45 g L-1 KOH but has no significant effect at 150 g L-1 KOH. The optimal condition for removing aluminium impurity in the KOH + K2CO3+ H2O system is 150 g L-1 KOH, 50 g L-1 K2CO3 and 80 degrees C. (c) 2007 Elsevier B.V. All rights reserved. |
| 英文摘要 | In the novel clean chromate production process, the alkali liquor recycled to decompose the chromite ore mainly consists of KOH and K2CO3 which accumulates aluminium impurity and affects the quality of the product greatly. Aluminium impurity can be removed by adding CaO to precipitate as 3CaO center dot Al2O3 center dot 6H(2)O (C(3)AH(6)). A study of the effects of various parameters, such as KOH concentration, K2CO3 concentration and temperature on the behaviour Of C(3)AH(6) show that C(3)AH(6) is decomposed to 3CaO center dot Al2O3 center dot CaCO3 center dot 11H(2)O and CaCO3 below 150 g L-1 KOH, and decomposed to Ca(OH)(2) above 150 g L-1 KOH. With K2CO3 concentration increasing, C(3)AH(6) decomposes significantly, which results in more CaCO3 or 3CaO center dot Al2O3 center dot CaCO3 center dot 11H(2)O produced. Temperature has a large positive effect on the decomposition of C(3)AH(6) at 45 g L-1 KOH but has no significant effect at 150 g L-1 KOH. The optimal condition for removing aluminium impurity in the KOH + K2CO3+ H2O system is 150 g L-1 KOH, 50 g L-1 K2CO3 and 80 degrees C. (c) 2007 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] | CLEANER PRODUCTION ; CHROMITE ORE ; CHEMISTRY ; LIME |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000253804000014 |
| 公开日期 | 2013-10-08 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/2869]  |
| 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, Beijing 100080, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Shaona,Zheng, Shili,Zhang, Yi. Stability of 3CaO center dot Al2O3 center dot 6H(2)O in KOH+K2CO3+H2O system for chromate production[J]. HYDROMETALLURGY,2008,90(2-4):201-206. |
| APA | Wang, Shaona,Zheng, Shili,&Zhang, Yi.(2008).Stability of 3CaO center dot Al2O3 center dot 6H(2)O in KOH+K2CO3+H2O system for chromate production.HYDROMETALLURGY,90(2-4),201-206. |
| MLA | Wang, Shaona,et al."Stability of 3CaO center dot Al2O3 center dot 6H(2)O in KOH+K2CO3+H2O system for chromate production".HYDROMETALLURGY 90.2-4(2008):201-206. |
入库方式： OAI收割
来源：过程工程研究所
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