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Laboratory and Pilot Scale Studies of Potassium Extraction from K-feldspar Decomposition with CaCl2 and CaCO3
Zhang, Yan1; Asselin, Edouard2; Li, Zhibao1
2016-02-01
Source PublicationJOURNAL OF CHEMICAL ENGINEERING OF JAPAN
ISSN0021-9592
Volume49Issue:2Pages:111-119
Abstract

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.

KeywordFeldspar Potassium Cacl2 Caco3 Pilot Test
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1252/jcej.15we078
URL查看原文
Indexed BySCI
Language英语
WOS KeywordSoda-ash Industry ; Distiller Waste ; Dissolution ; Kinetics ; Water
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationScience and Technology Planning Project of Qinghai Province(2012-GY-3492) ; National Basic Research Development Program of China (973 Program)(2013CB632605) ; National Natural Science Foundation of China(21476235 ; U1407112)
WOS IDWOS:000371236900006
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/20645
Collection研究所(批量导入)
Corresponding AuthorLi, Zhibao
Affiliation1.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
Recommended Citation
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.
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