Laboratory and Pilot Scale Studies of Potassium Extraction from K-feldspar Decomposition with CaCl2 and CaCO3

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	Laboratory and Pilot Scale Studies of Potassium Extraction from K-feldspar Decomposition with CaCl2 and CaCO3
	Zhang, Yan 1; Asselin, Edouard 2; Li, Zhibao 1
刊名	JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
	2016-02-01
卷号	49 期号:2 页码:111-119
关键词	Feldspar Potassium CaCl2 CaCO3 Pilot Test
ISSN号	0021-9592
通讯作者	Li, ZB (reprint author), Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China.
英文摘要	Processes for potassium extraction from abundant K-feldspar have recently attracted interest to ensure potash self-sufficiency for developing countries. Concurrently, distiller waste and soda residue formed in the ammonia-soda process (Solvay method) have resulted in serious pollution. A method of potassium extraction from K-feldspar with distiller waste and soda residue as additives is proposed. The effects of roasting temperature, particle size of K-feldspar and the amount of additive on potassium extraction for the K-feldspar-CaCl2-CaCO3 system were studied. The reaction kinetics of the system with mass ratios of K-feldspar (106-160 mu m) : CaCl2 : CaCO3 = 1 : 2 : 2 at 750-850 degrees C were modeled by the diffusion-based Ginstling-Brounshtein equation. The apparent activation energy was approximately 111 kJ.mol(-1). On the basis of the XRD and SEM-EDS analysis, two different reaction mechanisms were proposed below and above the melting point of CaCl2 (772 degrees C). A pilot test was carried out at a roasting temperature of 850 degrees C and the recovery of potassium was approximately 82%. The encouraging results obtained in the laboratory were replicated at the pilot scale.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Engineering, Chemical
研究领域[WOS]	Engineering
关键词[WOS]	SODA-ASH INDUSTRY ; DISTILLER WASTE ; DISSOLUTION ; KINETICS ; WATER
收录类别	SCI
原文出处	SOC CHEMICAL ENG JAPAN
语种	英语
WOS记录号	WOS:000371236900006
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/20645]
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, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China 2.Univ British Columbia, Dept Mat Engn, Vancouver, BC V6T 1Z4, Canada
推荐引用方式 GB/T 7714	Zhang, Yan,Asselin, Edouard,Li, Zhibao. Laboratory and Pilot Scale Studies of Potassium Extraction from K-feldspar Decomposition with CaCl2 and CaCO3[J]. JOURNAL OF CHEMICAL ENGINEERING OF JAPAN,2016,49(2):111-119.
APA	Zhang, Yan,Asselin, Edouard,&Li, Zhibao.(2016).Laboratory and Pilot Scale Studies of Potassium Extraction from K-feldspar Decomposition with CaCl2 and CaCO3.JOURNAL OF CHEMICAL ENGINEERING OF JAPAN,49(2),111-119.
MLA	Zhang, Yan,et al."Laboratory and Pilot Scale Studies of Potassium Extraction from K-feldspar Decomposition with CaCl2 and CaCO3".JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 49.2(2016):111-119.