Knowledge Management System Of Institute of process engineering,CAS
| Extraction of valuable metals from acidic wastewater and blast furnace slag by a collaborative utilization process | |
| Ju, Jinrong1,2,3; Feng, Yali1; Li, Haoran2,3; Xu, Chenglong1,2,3 | |
| 2022-04-27 | |
| Source Publication | ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING
 |
| ISSN | 1932-2135 |
| Pages | 16 |
| Abstract | Two typical wastes, acidic wastewater and titanium-bearing blast furnace slag, are generated in the smelting process of vanadium-titanium magnetite. Generally, the acidic wastewater is neutralized by lime or limestone and titanium-bearing blast furnace slag is directly stacked in the tailings pond, which not only pollutes the ecological environment but also causes the waste of metal resources. In this study, a collaborative utilization process for efficient extraction of titanium, iron, magnesium, and aluminum from acidic wastewater and low titanium-bearing blast furnace (LTBBF) slag was proposed. At the leaching temperature of 80 degrees C, the leaching time of 50 min, and the liquid-solid ratio of 9:1, 99.26% Ti, 99.47% Mg, and 99.45% Al could be extracted from LTBBF slag by acidic wastewater. Leaching residue mainly composed of Ca and Si could be used as silicon fertilizer. The Ti in the leaching solution could be separated by adding Na3PO4. The precipitation efficiency of Ti reached 98.53% under the molar ratio of Na3PO4 to TiO2 of 1.4, reaction temperature of 85 degrees C, and reaction time of 40 min. The titanium phosphate ((TiO)(2)P2O7) was obtained by calcination of the precipitate at 900 degrees C for 3 h. Adding oxalic acid to the filtrate above, the precipitation efficiency of Fe, Mg, and Mn reached 96.47%, 99.21%, and 99.45%, respectively, under the optimal conditions, while the precipitation efficiency of Al was only .38%. By adjusting the pH of the filtrate to 6.5, 99.83% Al could be precipitated as Al(OH)(3), and the final solution was evaporated to obtain Na2SO4 products. The method proposed realizes the harmless treatment of acidic wastewater and LTBBF slag and recovers the metal resources in both of them. |
| Keyword | acidic wastewater leaching low titanium-bearing blast furnace slag oxalic acid precipitation titanium phosphate |
| DOI | 10.1002/apj.2777 |
| Language | 英语 |
| WOS Keyword | GLASS-CERAMICS ; SULFURIC-ACID ; CRYSTALLIZATION BEHAVIOR ; SELECTIVE ENRICHMENT ; TITANIUM-DIOXIDE ; TI ; KINETICS ; PRECIPITATION ; REDUCTION ; MECHANISM |
| Funding Project | China Ocean Mineral Resources RD Association[JS-KTHT-2019-01] |
| WOS Research Area | Engineering |
| WOS Subject | Engineering, Chemical |
| Funding Organization | China Ocean Mineral Resources RD Association |
| WOS ID | WOS:000787731700001 |
| Publisher | WILEY |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ipe.ac.cn/handle/122111/52885 |
| Collection | 中国科学院过程工程研究所 |
| Corresponding Author | Feng, Yali; Li, Haoran |
| Affiliation | 1.Univ Sci & Technol Beijing, Civil & Resource Engn Sch, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, Key Lab Biochem Engn, Beijing, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Ju, Jinrong,Feng, Yali,Li, Haoran,et al. Extraction of valuable metals from acidic wastewater and blast furnace slag by a collaborative utilization process[J]. ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING,2022:16. |
| APA | Ju, Jinrong,Feng, Yali,Li, Haoran,&Xu, Chenglong.(2022).Extraction of valuable metals from acidic wastewater and blast furnace slag by a collaborative utilization process.ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING,16. |
| MLA | Ju, Jinrong,et al."Extraction of valuable metals from acidic wastewater and blast furnace slag by a collaborative utilization process".ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING (2022):16. |
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