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Development of a novel process for energy and materials recovery in steelmaking slags
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Li, Juncheng, Bhattacharjee, Debashish, Hu, Xiaojun, Zhang, Dianwei, Sridhar, Seetharaman and Li, Zushu (2017) Development of a novel process for energy and materials recovery in steelmaking slags. Mineral Processing and Extractive Metallurgy , 126 (1-2). pp. 94-105. doi:10.1080/03719553.2016.1259871
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Official URL: http://dx.doi.org/10.1080/03719553.2016.1259871
Abstract
This work aims at gathering fundamental knowledge for the development of a novel process for energy (H2 gas) and materials (magnetite Fe3O4) recovery in hotsteelmaking slags by reacting molten steelmaking slag with steam. Thermodynamic simulation was carried out to calculate the accumulated amount of produced H2 gas as a function of the volume of H2O-Ar gas introduced and the precipitated phases of the molten slags during controlled cooling. Laboratory experiments of crystallisation behaviours of molten slags during cooling were visualized in situ through a confocal laser scanning microscope (CSLM), and the cooled slags obtained were characterised by using SEM-EDS and XRD. CCT diagrams for different slags were created showing the slag crystallisation/phase transformation at different cooling rates. The recovery ratio of H2 gas and the maximum potential recovery ratio of iron oxide in the oxidised slags were calculated, which concludes that with increasing the slag basicity from 1.0 to 1.5 and 2.0, the recovery ratio of H2 was found to increase from 12.6% to 23.7% and 22.6%, and the maximum potential recovery ratio of iron oxide was found to increase from 18.3% to 34.4% and 32.8% under the investigated conditions.
| Item Type: | Journal Article | ||||||
|---|---|---|---|---|---|---|---|
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) | ||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||||
| Library of Congress Subject Headings (LCSH): | Steel -- Thermal properties, Steel -- Hydrogen content , Magnetite | ||||||
| Journal or Publication Title: | Mineral Processing and Extractive Metallurgy | ||||||
| Publisher: | Routledge | ||||||
| ISSN: | 0371-9553 | ||||||
| Official Date: | 18 January 2017 | ||||||
| Dates: |
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| Volume: | 126 | ||||||
| Number: | 1-2 | ||||||
| Page Range: | pp. 94-105 | ||||||
| DOI: | 10.1080/03719553.2016.1259871 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||
| Funder: | Innovate UK, Tata Steel, Engineering and Physical Sciences Research Council (EPSRC), China. Guo jia ke xue ji shu bu [Ministry of Science and Technology] (CMST) | ||||||
| Grant number: | Project No. 102170 (CMST) |
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