{"title":"以铝酸钙渣为原料生产氧化铝的hcl基冶金新工艺。","authors":"Maria Bagani, Amalia Bempelou, Michail Vafeias, Danai Marinos, Anastasia Pilichou, Dimitrios Kotsanis, Dimitrios Sparis, Efthymios Balomenos, Dimitrios Panias","doi":"10.1007/s40831-025-01100-8","DOIUrl":null,"url":null,"abstract":"<p><p>A novel, HCl-based metallurgical process is investigated aiming at the production of <i>α</i>-Al<sub>2</sub>O<sub>3</sub> from calcium aluminate slags. The process includes the following stages: (a) leaching of the slag with aqueous HCl to dissolve the aluminum content and separate SiO<sub>2</sub> as a filterable precipitate, (b) HCl<sub>(<i>g</i>)</sub> purging precipitation of the dissolved aluminum in the form of aluminum chloride hexahydrate salt (AlCl<sub>3</sub>∙6H<sub>2</sub>O, ACH), (c) partial removal of dissolved metal impurities from the impure ACH by acetone washing and (d) calcination of the higher purity ACH to produce <i>α</i>-Al<sub>2</sub>O<sub>3</sub>. Under optimum leaching conditions, approximately 90% of aluminum is successfully extracted. An ACH purity of 97.5% was achieved after the precipitation and purification process. After calcination of the ACH, <i>α</i>-Al<sub>2</sub>O<sub>3</sub> of 98.5% purity was produced.</p><p><strong>Graphical abstract: </strong></p>","PeriodicalId":17160,"journal":{"name":"Journal of Sustainable Metallurgy","volume":"11 3","pages":"2272-2282"},"PeriodicalIF":3.2000,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12397148/pdf/","citationCount":"0","resultStr":"{\"title\":\"Alumina Production from Calcium Aluminate Slags with a Novel HCl-Based Metallurgical Process.\",\"authors\":\"Maria Bagani, Amalia Bempelou, Michail Vafeias, Danai Marinos, Anastasia Pilichou, Dimitrios Kotsanis, Dimitrios Sparis, Efthymios Balomenos, Dimitrios Panias\",\"doi\":\"10.1007/s40831-025-01100-8\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>A novel, HCl-based metallurgical process is investigated aiming at the production of <i>α</i>-Al<sub>2</sub>O<sub>3</sub> from calcium aluminate slags. The process includes the following stages: (a) leaching of the slag with aqueous HCl to dissolve the aluminum content and separate SiO<sub>2</sub> as a filterable precipitate, (b) HCl<sub>(<i>g</i>)</sub> purging precipitation of the dissolved aluminum in the form of aluminum chloride hexahydrate salt (AlCl<sub>3</sub>∙6H<sub>2</sub>O, ACH), (c) partial removal of dissolved metal impurities from the impure ACH by acetone washing and (d) calcination of the higher purity ACH to produce <i>α</i>-Al<sub>2</sub>O<sub>3</sub>. Under optimum leaching conditions, approximately 90% of aluminum is successfully extracted. An ACH purity of 97.5% was achieved after the precipitation and purification process. After calcination of the ACH, <i>α</i>-Al<sub>2</sub>O<sub>3</sub> of 98.5% purity was produced.</p><p><strong>Graphical abstract: </strong></p>\",\"PeriodicalId\":17160,\"journal\":{\"name\":\"Journal of Sustainable Metallurgy\",\"volume\":\"11 3\",\"pages\":\"2272-2282\"},\"PeriodicalIF\":3.2000,\"publicationDate\":\"2025-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12397148/pdf/\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Sustainable Metallurgy\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1007/s40831-025-01100-8\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2025/5/8 0:00:00\",\"PubModel\":\"Epub\",\"JCR\":\"Q3\",\"JCRName\":\"GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Sustainable Metallurgy","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1007/s40831-025-01100-8","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/5/8 0:00:00","PubModel":"Epub","JCR":"Q3","JCRName":"GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY","Score":null,"Total":0}
Alumina Production from Calcium Aluminate Slags with a Novel HCl-Based Metallurgical Process.
A novel, HCl-based metallurgical process is investigated aiming at the production of α-Al2O3 from calcium aluminate slags. The process includes the following stages: (a) leaching of the slag with aqueous HCl to dissolve the aluminum content and separate SiO2 as a filterable precipitate, (b) HCl(g) purging precipitation of the dissolved aluminum in the form of aluminum chloride hexahydrate salt (AlCl3∙6H2O, ACH), (c) partial removal of dissolved metal impurities from the impure ACH by acetone washing and (d) calcination of the higher purity ACH to produce α-Al2O3. Under optimum leaching conditions, approximately 90% of aluminum is successfully extracted. An ACH purity of 97.5% was achieved after the precipitation and purification process. After calcination of the ACH, α-Al2O3 of 98.5% purity was produced.
期刊介绍：
Journal of Sustainable Metallurgy is dedicated to presenting metallurgical processes and related research aimed at improving the sustainability of metal-producing industries, with a particular emphasis on materials recovery, reuse, and recycling. Its editorial scope encompasses new techniques, as well as optimization of existing processes, including utilization, treatment, and management of metallurgically generated residues. Articles on non-technical barriers and drivers that can affect sustainability will also be considered.
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