Iron reduction and diopside-based glass ceramic preparation based on mineral carbonation of steel slag
| Autor: | Songli Liu, Tong Zhibo, Wang Jiang, Tan Zhaojun, Sun Jingting |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Ceramics
Materials science Iron Health Toxicology and Mutagenesis Silicic Acid Industrial Waste 010501 environmental sciences engineering.material Anorthite 01 natural sciences law.invention chemistry.chemical_compound law Environmental Chemistry Ceramic Crystallization 0105 earth and related environmental sciences Minerals Glass-ceramic Diopside Metallurgy Slag Melilite General Medicine Pollution Calcium carbonate chemistry Steel visual_art engineering visual_art.visual_art_medium Glass |
| Zdroj: | Environmental Science and Pollution Research. 28:796-804 |
| ISSN: | 1614-7499 0944-1344 |
| DOI: | 10.1007/s11356-020-10358-2 |
| Popis: | In this article, a new process for treating steel slag and CO2 simultaneously and preparing calcium carbonate, metallic iron, and glass ceramics without wastewater or gas production is proposed. The reduction of iron and preparation of diopside glass ceramics are studied in this paper, and the results show that the carbon thermal reduction product of the original slag does not reach its melting point, and the slag and iron are well separated in the samples containing the leached steel slag and added silica. Part of the parent glass is converted into a glass ceramic after heat treatment, and the crystalline phases of samples are melilite, diopside, and partial melilite, and diopside and anorthite, respectively. The crystallization activation energy of the best sample in this article is E = 660.664 kJ/mol. The Avrami indices calculated at different heating rates are all less than 3, which indicates that the crystallization mode of the glass involves surface crystallization. This finding is consistent with the results for the prepared glass ceramics. |
| Databáze: | OpenAIRE |
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