Desilication of concentrated alkali solution by novel desilication reagent calcium hydroferrocarbonate: Part III. Standard thermodynamics investigation of desilication reaction using hydroferrite desilication reagents

doi:10.1016/j.hydromet.2019.05.011

	Desilication of concentrated alkali solution by novel desilication reagent calcium hydroferrocarbonate: Part III. Standard thermodynamics investigation of desilication reaction using hydroferrite desilication reagents
	Hong, Tao 2; Luo, Jun 2; Mumford, Kathryn A.1; Stevens, Geoff W.1; Zheng, Shili 3
刊名	HYDROMETALLURGY
	2019-08-01
卷号	187 页码:212-220
关键词	Hydroferrite agents Desilication Substitution reaction Standard thermodynamic investigation
ISSN号	0304-386X
DOI	10.1016/j.hydromet.2019.05.011
英文摘要	The property of lower soda and alumina contents of iron hydrogarnet can reduce the loss of soda and alumina in Bayer and Sub-molten salt process. Thus, the economic efficiency of alumina production could be improved. How to solve the effective formation of iron hydrogarnet in concentrated caustic aluminate solution and its cycle in the digestion process has become an important research topic. The base of hydroferrire desilication agents (calcium hydroferrite CHF, calcium hydroferrocarbonate CHFC, calcium hydroferrosulfate CHFS) were synthesized, the desilication experiments and desilication products (DSPs) were characterized, the results show that the hydroandradite and aluminum-hydroandradite are the main components in DSPs. The free energy of synthesis reaction of desilication agents and desilication reaction in concentrated caustic solution was investigated using the complex silicate theory. The investigation shows that CHFC has the better desilication performance for hydroferrite desilication agents. The free energy of desilication reaction in concentrated caustic solution using hydroandradite is affected by the initial silica coefficient, the reacted silica coefficient of DSPs, and the reaction temperature. From the point of view of thermodynamics, the substitution reaction between aluminum to iron that occurred in the concentrated caustic aluminosilicate solution main occurs when the higher initial silica coefficient of hydroandradite and the higher alumina coefficient of reaction product.
资助项目	National Natural Science Foundation of China[51304182] ; China Scholarship Council scholarship[201707835003]
WOS关键词	HIGH-SILICA BAUXITE ; BAYER ; DISSOLUTION ; DIGESTION ; CHEMISTRY ; RECOVERY ; ALUMINA ; LIME ; DSP ; KOH
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000477785100022
资助机构	National Natural Science Foundation of China ; China Scholarship Council scholarship
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/30450]
专题	中国科学院过程工程研究所
通讯作者	Hong, Tao; Mumford, Kathryn A.
作者单位	1.Univ Melbourne, Dept Chem Engn, Melbourne, Vic 3010, Australia 2.Xian Univ Architecture & Technol, Sch Met Engn, Shaanxi Engn Res Ctr Met Technol, Xian 710055, Shaanxi, Peoples R China 3.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Hong, Tao,Luo, Jun,Mumford, Kathryn A.,et al. Desilication of concentrated alkali solution by novel desilication reagent calcium hydroferrocarbonate: Part III. Standard thermodynamics investigation of desilication reaction using hydroferrite desilication reagents[J]. HYDROMETALLURGY,2019,187:212-220.
APA	Hong, Tao,Luo, Jun,Mumford, Kathryn A.,Stevens, Geoff W.,&Zheng, Shili.(2019).Desilication of concentrated alkali solution by novel desilication reagent calcium hydroferrocarbonate: Part III. Standard thermodynamics investigation of desilication reaction using hydroferrite desilication reagents.HYDROMETALLURGY,187,212-220.
MLA	Hong, Tao,et al."Desilication of concentrated alkali solution by novel desilication reagent calcium hydroferrocarbonate: Part III. Standard thermodynamics investigation of desilication reaction using hydroferrite desilication reagents".HYDROMETALLURGY 187(2019):212-220.