Dechromization Kinetics of Limonitic Laterite Ores by Alkali-roasting Method Using Sodium Hydroxide
文献类型：会议论文
| 作者 | Guo, Q.; Qu, J. K.; Han, B. B.; Wei, G. Y.; Qi, T. |
| 出版日期 | 2011 |
| 会议名称 | International Conference on Chemical Engineering and Advanced Materials |
| 会议日期 | MAY 28-30, 2011 |
| 会议地点 | Changsha, PEOPLES R CHINA |
| 关键词 | Activation pretreatment Alkali-roasting Cr-containing limonitic laterite ores Dechromization kinetics Pressure acid leaching Sodium hydroxide NICKELIFEROUS LATERITES SULFURIC-ACID RESIDUE RECOVERY PRESSURE BEHAVIOR |
| 页码 | 798-804 |
| 中文摘要 | A novel process was proposed for the activation pretreatment of Cr-containing limonitic laterite ores by NaOH roasting. The dechromization kinetics of the laterite ores and the effect of particle size, NaOH-ore ratio, and roasting temperature on Cr extraction were studied in detail. Experimental results indicate that decreasing the particle size and increasing the NaOH-ore ratio and roasting temperature increase the Cr extraction rate. Approximately 96% Cr in the laterite ores could be extracted under the optimal alkali-roasting conditions. The results also indicate that the Avrami model is suitable for the dechromization process and that the apparent activation energy is calculated 11.12 kJ.mol(-1). The 99.5% Cr2O3 was obtained from Na(2)Cra(4) leached in the alkali solution by liquid-phase reduction and then calcining at high temperature. |
| 收录类别 | ISTP |
| 会议网址 | |
| 会议录 | FUNDAMENTAL OF CHEMICAL ENGINEERING, PTS 1-3 丛书: Advanced Materials Research 卷: 233-235 页: 798-804
 |
| 会议录出版者 | Trans Tech Publications Ltd |
| 语种 | 英语 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/11390]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 推荐引用方式 GB/T 7714 |
Guo, Q.,Qu, J. K.,Han, B. B.,et al. Dechromization Kinetics of Limonitic Laterite Ores by Alkali-roasting Method Using Sodium Hydroxide[C]. 见:International Conference on Chemical Engineering and Advanced Materials. Changsha, PEOPLES R CHINA. MAY 28-30, 2011. |
入库方式： OAI收割
来源：过程工程研究所
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