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The Use of Steelmaking Slags in Land and Marine Applications / LUCY FISHER
Swansea University Author: LUCY FISHER
PDF | E-Thesis – open access
Copyright: The Author, Lucy V. Fisher, 2023.Download (21.22MB)
DOI (Published version): 10.23889/SUthesis.64999
Iron and steel are essential components of the world’s infrastructure and have applications across all industries. Demand for steel across the world has lead to 1900 million tons being produced annually, with this number expected to keep increasing. This means that the waste coming from the steelmak...
Swansea, Wales, UK
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Iron and steel are essential components of the world’s infrastructure and have applications across all industries. Demand for steel across the world has lead to 1900 million tons being produced annually, with this number expected to keep increasing. This means that the waste coming from the steelmaking process will most likely also keep increasing. Basic oxygen steelmaking (BOS) slag is a waste product from the secondary steelmaking process. However much of the BOS slag goes to landfill and does not get utilised as well as it could be. This thesis explores several different ways BOS slag can be utilised and looks at how effective it is in each application. The first application tested is the ability for the BOS slag to capture CO2 and how this then makes it suitable for applications within the concrete industry. The slag’s reaction to sea water was then assessed and what harmful effects it could possibly have on the environment. Slag is well known for being a good fertiliser for plants due to its desirable composition made up of Calcium, Silicon, Iron and others. The slag was tested to see if this specific kind of slag could provide fertiliser properties. It was also explored if the slag could be functionalised with carboxylic acids in order to become hydrophobic or hydrophilic meaning that when the slag is used as fertiliser for plants, water can be channelled towards the seed and not be absorbed before it reaches the seed.
Steelmaking Slag, Reutilisation, Recycling
Faculty of Science and Engineering