Extraction of valuable metals from Ti-bearing blast furnace slag using ammonium sulfate pressurized pyrolysis-acid leaching processes

doi:10.1016/S1003-6326(20)65425-5

	Extraction of valuable metals from Ti-bearing blast furnace slag using ammonium sulfate pressurized pyrolysis-acid leaching processes
	Bian, Zhen-zhong 1; Feng, Ya-li 1; Li, Hao-ran 2
刊名	TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
	2020-10-01
卷号	30 期号:10 页码:2836-2847
关键词	Ti-bearing blast furnace slag ammonium sulfate pressurized pyrolysis high value products
ISSN号	1003-6326
DOI	10.1016/S1003-6326(20)65425-5
英文摘要	A 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.
资助项目	China 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关键词	THERMAL-DECOMPOSITION ; TITANIUM ; RECOVERY ; SERPENTINE ; SEPARATION ; BEHAVIOR ; SI
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000590076600003
资助机构	China Ocean Mineral Resources RD Association ; Major Science and Technology Program for Water Pollution Control and Treatment, China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/42637]
专题	中国科学院过程工程研究所
通讯作者	Feng, Ya-li; Li, Hao-ran
作者单位	1.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
推荐引用方式 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.