{"title":"Substance migration and transformation during the corrosion of magnesia-chromium refractories by municipal solid waste incineration (MSWI) fly ash","authors":"Qinqin Wang, Min Xia, Chao Chen","doi":"10.1007/s41779-025-01211-1","DOIUrl":null,"url":null,"abstract":"<div><p>The corrosion mechanism of municipal solid waste incineration (MSWI) fly ash on magnesia-chromium refractories from the perspective of substance migration and transformation was investigated by using corrosion test at 1400 ℃. XRD, XRF, and SEM-EBSD characterization and thermodynamic software FactSage analysis were utilized. Although thermally stable compound MgCr<sub>2</sub>O<sub>4</sub> can be formed in the refractories mitigating the corrosion, the SiO<sub>2</sub> in the fly ash can convert MgCr<sub>2</sub>O<sub>4</sub> to Mg<sub>2</sub>SiO<sub>4</sub> (forsterite) and MgSiO<sub>3</sub>.The regeneration and transformation of MgCr<sub>2</sub>O<sub>4</sub>, as well as the low melting point and volume expansion properties of Mg<sub>2</sub>SiO<sub>4</sub> and MgSiO<sub>3</sub>, are responsible for the loosening of the refractory structure and the migration of magnesium from the refractory into the ash. When the refractory was corroded by MSWI fly ash repeatedly, the migration of the corrosion products from the refractory to the ash was the key to aggravate the corrosion. Increasing CaO content can mitigate the corrosion and magnesium migration by alleviating the formation of Mg<sub>2</sub>SiO<sub>4</sub> and MgSiO<sub>3</sub>.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 5","pages":"1811 - 1821"},"PeriodicalIF":2.1000,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of the Australian Ceramic Society","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s41779-025-01211-1","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
引用次数: 0
Abstract
The corrosion mechanism of municipal solid waste incineration (MSWI) fly ash on magnesia-chromium refractories from the perspective of substance migration and transformation was investigated by using corrosion test at 1400 ℃. XRD, XRF, and SEM-EBSD characterization and thermodynamic software FactSage analysis were utilized. Although thermally stable compound MgCr2O4 can be formed in the refractories mitigating the corrosion, the SiO2 in the fly ash can convert MgCr2O4 to Mg2SiO4 (forsterite) and MgSiO3.The regeneration and transformation of MgCr2O4, as well as the low melting point and volume expansion properties of Mg2SiO4 and MgSiO3, are responsible for the loosening of the refractory structure and the migration of magnesium from the refractory into the ash. When the refractory was corroded by MSWI fly ash repeatedly, the migration of the corrosion products from the refractory to the ash was the key to aggravate the corrosion. Increasing CaO content can mitigate the corrosion and magnesium migration by alleviating the formation of Mg2SiO4 and MgSiO3.
期刊介绍：
Publishes high quality research and technical papers in all areas of ceramic and related materials
Spans the broad and growing fields of ceramic technology, material science and bioceramics
Chronicles new advances in ceramic materials, manufacturing processes and applications
Journal of the Australian Ceramic Society since 1965
Professional language editing service is available through our affiliates Nature Research Editing Service and American Journal Experts at the author''s cost and does not guarantee that the manuscript will be reviewed or accepted
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
