粉煤灰中稀有金属镓-铌-稀土的联合提取

doi:10.3981/j.issn.1000-7857.2015.11.006

Abstract
Figure/Table
References (0)
Related Citation (13)

Download: PDF (823 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract: Alkali sintering-multistep leaching experiments are carried out to extract the rare metals Ga, Nb and REE (rare earth elements) from the fly ash in the circulating fluidized bed (CFB) generated from the Anwen Coal-fired Power Plant in Chongqing, Southwest China. It is shown that, the roasting of the CFB fly ash with 1.5 times Na₂CO₃ under 860℃ for 30 minutes, followed by the water leaching (Solid/Liquid (S/L)=1:10; 90℃; 2 hours) extraction of Ga and the acid leaching (HCl solution, 6 mol/L; S/L= 1:20; 60℃; 2 hours) extraction of REE, can achieve extraction rates of 84.70% and 80.07% for Ga and REE, respectively. The leaching rate of Niobium (Nb) enriched in the acid leaching residue, is lower than 1% in the above two steps. Adsorption and desorption experiments of Gallium from the Ga-rich water leaching filtrate using the D201 ion exchange resin and NH₄Cl solution (0.5 mol/L) are carried out both under a temperature of 40℃. The adsorption rate (27.99%) and the desorption rate (37.33%) of Ga are unsatisfactory. The conditions of the follow-up experiments would be adjusted in order to enhance the separation and extraction effect of Ga. The extraction process of Nb from the acid leaching residue and the separation of REE from the acid leaching solution also need to be further studied. With the above combined extraction technology for Ga, Nb, REE and subsequent studies, a high value-added fly ash product is expected. The environmental pollution pressure caused by the Anwen fly ash might be alleviated.

Key words： fly ash rare metal gallium niobium rare earth elements combined extraction

Received: 16 March 2015

ZTFLH:

X752

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	LIU Huidong
	TIAN Heming
	ZOU Jianhua

Cite this article:

LIU Huidong,TIAN Heming,ZOU Jianhua. Combined extraction of rare metals Ga-Nb-REE from the fly ash[J]. Science & Technology Review, 2015, 33(11): 39-43.

URL:

http://www.kjdb.org/EN/10.3981/j.issn.1000-7857.2015.11.006 OR http://www.kjdb.org/EN/Y2015/V33/I11/39

[1] 岳光溪. 循环流化床技术发展与应用[J]. 节能与环保, 2003(12): 3-4. Yue Guangxi. The development of circulating fluidized bed technology and application[J]. Energy Saving and Environmental Protection, 2003 (12): 3-4.
[2] 史培甫. 工业锅炉节能减排应用技术[M]. 北京: 化学工业出版社, 2009. Shi Peifu. Application technology of energy-saving and emission reduction of the industrial boiler[M]. Beijing: Chemical Industry Press, 2009.
[3] 黄从国. 大气污染控制技术[M]. 北京: 化学工业出版社, 2013. Huang Congguo. Air pollution control technology[M]. Beijing: Chemical Industry Press, 2013.
[4] 姚志通, 夏枚生, 叶瑛, 等. 循环流化床锅炉脱硫灰和普通粉煤灰的特性研究[J]. 粉煤灰综合利用, 2010(1): 6-12. Yao Zhitong, Xia Meisheng, Ye Ying, et al. Study on characteristics of CFB desulfurated fly ash and pulverized fly ash[J]. Comprehensive Utilization of Fly Ash, 2010(1): 6-12.
[5] Dai S, Ren D, Chou C L, et al. Geochemistry of trace elements in Chinese coals: A review of abundances, genetic types, impacts on human health, and industrial utilization[J]. International Journal of Coal Geology, 2012, 94(1): 3-21.
[6] Dai S, Wang X, Zhou Y, et al. Chemical and mineralogical compositions of silicic, mafic, and alkali tonsteins in the late Permian coals from the Songzao coalfield, Chongqing, Southwest China[J]. Chemical Geology, 2011, 282(1-2): 29-44.
[7] Linak W P, Wendt J O L. Trace metal transformation mechanisms during coal combustion[J]. Fuel Processing Technology, 1994, 39(1): 173-198.
[8] 赵毅, 赵英. 从粉煤灰中分离镓的实验研究[J]. 华北电力技术, 1998 (1): 35-37. Zhao Yi, Zhao Ying. Experiment study on the separation of gallium from the fly ash[J]. North China Electric Power Technology, 1998(1): 35-37.
[9] 许富军, 许诺真. 三段碳酸化法生产金属镓[J]. 河南化工, 2002(10): 21-22. Xu Fujun, Xu Nuozhen. Production of gallium by the method of three-section carbonation[J]. Henan Chemical Industry, 2002(10): 21-22.
[10] Abisheva Z S, Zagorodnyaya A N. Hydrometallurgy in rare metal production technology in Kazakhstan[J]. Hydrometallurgy, 2002, 63(1): 55-63.
[11] Kumbasar R A, Tutkun O. Separation and concentration of gallium from acidic leach solutions containing various metal ions by emulsion type of liquid membranes using TOPO as mobile carrier[J]. Hydrometallurgy, 2004, 75(1): 111-121.
[12] 胡明清. 边界品位的调整与低品位矿石资源的回收[J]. 采矿技术, 2006, 6(3): 594-596. Hu Mingqing. Recovery and the adjusting of the boundary of low grade ore resources[J]. Mining Technology, 2006, 6(3): 594-596.
[13] 向永生, 何焕学, 张继林. 低品位矿产资源评价问题研究——以金矿资源为例[J]. 地质与勘探, 2008, 44(3): 79-83. Xiang Yongsheng, He Huanxue, Zhang Jilin. Issues on evaluation of the low-grade mineral resources, taking the golden resources for example[J]. Geology and Exploration, 2008, 44(3): 79-83.
[14] 吕理霞. 氧化铝厂镓的回收[J]. 轻金属, 2002(5): 15-17. Lü Lixia. The recovery of gallium from the alumina smelter[J]. Light Metals, 2002(5): 15-17.
[15] 谢访友, 郭朋成. 用离子交换法从拜耳工艺溶液中提取镓的工业实践[J]. 湿法冶金, 2001, 20(2): 66-71. Xie Fangyou, Guo Pengcheng. Extraction process of gallium from Bayer solution by the ion exchange technology[J]. Hydrometallurgy, 2001, 20 (2): 66 -71.
[16] 杨马云, 蔡军.离子交换法回收镓工艺中螯合树脂的研究[J]. 轻金属, 2007(3): 14-16. Yang Mayun, Cai Jun. Study on ion exchange chelating resin in the process of the gallium recovery[J]. Light Metals, 2007(3):14 -16.
[17] 徐君镐, 李菁华. 用Kelex100由高碱度铝酸钠溶液中萃取镓[J]. 稀有金属, 1994, 18(2): 81-86. Xu Junhao, Li Jinghua. Extraction of gallium from the high alkali sodium aluminate solution by Kelex100[J]. Rare Metals, 1994, 18(2): 81-86.
[18] 陈光, 崔崇, 徐锋, 等. 新材料概论[M]. 北京: 国防工业出版社, 2013 (4): 234-235. Chen Guang, Cui Chong, Xu Feng, et al. New material science[M]. Beijing: National Defence Industry Press, 2013(4): 234-235.