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Desilication of concentrated alkali solution by novel desilication reagent calcium hydroferrocarbonate: Part III. Standard thermodynamics investigation of desilication reaction using hydroferrite desilication reagents
Hong, Tao1; Luo, Jun1; Mumford, Kathryn A.2; Stevens, Geoff W.2; Zheng, Shili3
2019-08-01
Source PublicationHYDROMETALLURGY
ISSN0304-386X
Volume187Pages:212-220
AbstractThe 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.
KeywordHydroferrite agents Desilication Substitution reaction Standard thermodynamic investigation
DOI10.1016/j.hydromet.2019.05.011
Language英语
WOS KeywordHIGH-SILICA BAUXITE ; BAYER ; DISSOLUTION ; DIGESTION ; CHEMISTRY ; RECOVERY ; ALUMINA ; LIME ; DSP ; KOH
Funding ProjectNational Natural Science Foundation of China[51304182] ; China Scholarship Council scholarship[201707835003]
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
Funding OrganizationNational Natural Science Foundation of China ; China Scholarship Council scholarship
WOS IDWOS:000477785100022
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/30451
Collection中国科学院过程工程研究所
Corresponding AuthorHong, Tao; Mumford, Kathryn A.
Affiliation1.Xian Univ Architecture & Technol, Sch Met Engn, Shaanxi Engn Res Ctr Met Technol, Xian 710055, Shaanxi, Peoples R China
2.Univ Melbourne, Dept Chem Engn, Melbourne, Vic 3010, Australia
3.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
Recommended Citation
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.
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