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Extraction of valuable metals from Ti-bearing blast furnace slag using ammonium sulfate pressurized pyrolysis-acid leaching processes
Bian, Zhen-zhong1; Feng, Ya-li1; Li, Hao-ran2
2020-10-01
Source PublicationTRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
ISSN1003-6326
Volume30Issue:10Pages:2836-2847
AbstractA novel method of extracting valuable metals from Ti-bearing blast furnace slag (TBBF slag) via pressure pyrolysis of recyclable ammonium sulfate (AS)-acid leaching process was proposed. The results show that when pressurized roasting at an AS-to-slag mass ratio 3:1 and 370 degrees C for 90 min, the extraction rates of titanium, aluminum and magnesium reached 94.5%, 91.9% and 97.4%, respectively. The acid leaching solution was subjected to re-crystallization in a boiling state to obtain a titanium product having a TiO2 content of 94.1%. The above crystallization mother liquor was adjusted to pH=6 and pH >= 12.2, respectively, and then qualified Al2O3 and MgO products were obtained. The analysis through XRD and SEM-EDS proves that the main phases in roasted samples were NH4AlSO4, CaSO4 and TiOSO4. The thermodynamic analysis presents that the main minerals of perovskite, spinel and diopside in raw ore could spontaneously react with the intermediate produced by AS under optimal conditions.
KeywordTi-bearing blast furnace slag ammonium sulfate pressurized pyrolysis high value products
DOI10.1016/S1003-6326(20)65425-5
Language英语
WOS KeywordTHERMAL-DECOMPOSITION ; TITANIUM ; RECOVERY ; SERPENTINE ; SEPARATION ; BEHAVIOR ; SI
Funding ProjectChina Ocean Mineral Resources RD Association[DY135-B2-15] ; Major Science and Technology Program for Water Pollution Control and Treatment, China[2015ZX07205-003] ; National Natural Science Foundation of China[21176242] ; National Natural Science Foundation of China[21176026]
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
Funding OrganizationChina Ocean Mineral Resources RD Association ; Major Science and Technology Program for Water Pollution Control and Treatment, China ; National Natural Science Foundation of China
WOS IDWOS:000590076600003
PublisherELSEVIER
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Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/42638
Collection中国科学院过程工程研究所
Corresponding AuthorFeng, Ya-li; Li, Hao-ran
Affiliation1.Univ Sci & Technol Beijing, Sch Civil & Resource Engn, Beijing 100083, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Bian, Zhen-zhong,Feng, Ya-li,Li, Hao-ran. Extraction of valuable metals from Ti-bearing blast furnace slag using ammonium sulfate pressurized pyrolysis-acid leaching processes[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2020,30(10):2836-2847.
APA Bian, Zhen-zhong,Feng, Ya-li,&Li, Hao-ran.(2020).Extraction of valuable metals from Ti-bearing blast furnace slag using ammonium sulfate pressurized pyrolysis-acid leaching processes.TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,30(10),2836-2847.
MLA Bian, Zhen-zhong,et al."Extraction of valuable metals from Ti-bearing blast furnace slag using ammonium sulfate pressurized pyrolysis-acid leaching processes".TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 30.10(2020):2836-2847.
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