Potential Use of Blast Furnace Slag and Steel Making Slag for Consolidation of Friable Sandstone Reservoirs

Abstract Due to increasing emissions of greenhouse gases into the atmosphere number of methods are being proposed to mitigate the risk of climate change. One of them is mineral carbonation. Blast furnace and steel making slags are co-products of metallurgical processes composed of minerals which represent appropriate source of cations required for mineral carbonation. Experimental studies were performed to determine the potential use of slags in this process. Obtained results indicate that steel making slag can be a useful material in CO2 capture procedures. Slag components dissolved in water are bonded as stable carbonates in the reaction with CO2 from ambient air. In case of blast furnace slag, the reaction is very slow and minerals are resistant to chemical changes. More time is needed for minerals dissolution and release of cations essential for carbonate crystallisation and thus makes blast furnace slags less favourable in comparison with steel making slag.

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Thermodynamic Study on Interfacial Reaction between Blast Furnace Slag and Silicon Carbide

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.723.622 ◽

2016 ◽

Vol 723 ◽

pp. 622-627

Author(s):

Hirohide Okuno ◽

Naotaka Fukami ◽

Nobuya Shinozaki

Keyword(s):

Silicon Carbide ◽

Blast Furnace ◽

Interfacial Reaction ◽

Blast Furnace Slag ◽

Thermodynamic Study ◽

Raw Material ◽

Reaction Products ◽

Steel Making ◽

Sic Ceramic ◽

Furnace Slag

Silicon carbide(SiC) is used as a raw material contained in the refractory that is in contact with molten iron or slag during steel-making processes. In present work, the interfacial reactions between the SiC ceramic substrate and the blast furnace slag were investigated and the thermodynamic study on the reaction products was carried out. The results showed that the Ti component contained in the slag became TiC, and gathered at the whole interface between the SiC substrate and the slag after experiments.

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Characteristics for Improvement of Compressive Strength of Geopolymers Made of Mixed Binders

Journal of Material Science and Technology Research ◽

10.31875/2410-4701.2020.07.05 ◽

2020 ◽

Vol 7 ◽

Author(s):

Tatsuya Koumoto

Keyword(s):

Compressive Strength ◽

Blast Furnace ◽

Fly Ash ◽

Blast Furnace Slag ◽

Melting Furnace ◽

Chemical Mechanism ◽

Portland Cement Concrete ◽

Hard Materials ◽

Steel Making ◽

Furnace Slag

Geopolymers are composite hard materials made by mixing binders, such as fly ash and slags, and activators, such as NaOH and sodium silicate. The chemical mechanism for hardening composite materials, aluminosilicate binders, with alkaline activators is known as a geopolymer reaction. Geopolymers have recently been developed to be used as a replacement for Portland cement concrete. Industrial by-products such as fly ash, steel making slags, and garbage melting furnace slags can be made into geopolymers in a process that emits less carbon dioxide than in the cement making process. This reduction in CO2 emission is important because CO2 is one of the substances known to contribute to global warming. In the future, further uses of these fly ash and slags must be explored. The development of high compressive strength geopolymers using fly ash and slags will strongly contribute to the fields of construction, geotechnical engineering, and architecture. So far, ground blast furnace slag has yielded the highest compressive strength geopolymer among various kind of binders such as fly ash, ground stainless steel-making slag, and garbage melting furnace slags. A potential use for the poor binders, yielding low compressive strength geopolymers, is to combine it with a richer binder to create stronger products. This paper examines the characteristics for improvement of compressive strength of geopolymers for the binders in various mixture ratios of poor binders and the ground blast furnace slag.

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Potential use of blast furnace slag for filtration membranes preparation: A pilot study

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/379/1/012012 ◽

2018 ◽

Vol 379 ◽

pp. 012012 ◽

Cited By ~ 1

Author(s):

V Bílek ◽

P Bulejko ◽

P Kejík ◽

J Hajzler ◽

J Másilko ◽

...

Keyword(s):

Blast Furnace ◽

Pilot Study ◽

Blast Furnace Slag ◽

Filtration Membranes ◽

Furnace Slag ◽

Potential Use

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Comparing Properties of Concrete Containing Electric Arc Furnace Slag and Granulated Blast Furnace Slag

Materials ◽

10.3390/ma12091371 ◽

2019 ◽

Vol 12 (9) ◽

pp. 1371 ◽

Cited By ~ 8

Author(s):

Jin-Young Lee ◽

Jin-Seok Choi ◽

Tian-Feng Yuan ◽

Young-Soo Yoon ◽

Denis Mitchell

Keyword(s):

Blast Furnace ◽

Blast Furnace Slag ◽

Setting Time ◽

Electric Arc Furnace ◽

Electric Arc ◽

Strength Development ◽

Hydration Reaction ◽

Arc Furnace ◽

Steel Making ◽

Furnace Slag

For sustainable development in the construction industry, blast furnace slag has been used as a substitute for cement in concrete. In contrast, steel-making slag, the second largest by-product in the steel industry, is mostly used as a filler material in embankment construction. This is because steel-making slag has relatively low hydraulicity and a problem with volumetric expansion. However, as the quenching process of slag has improved recently and the steel making process is specifically separated, the properties of steel-making slag has also improved. In this context, there is a need to find a method for recycling steel-making slag as a more highly valued material, such as its potential use as an admixture in concrete. Therefore, in order to confirm the possibility of using electric arc furnace (EAF) oxidizing slag as a binder, a comparative assessment of the mechanical properties of concrete containing electric arc furnace oxidizing slag, steel-making slag, and granulated blast furnace (GBF) slag was performed. The initial and final setting, shrinkage, compressive and split-cylinder tensile strength of the slag concretes were measured. It was found that replacing cement with EAF oxidizing slag delayed the hydration reaction at early ages, with no significant problems in setting time, shrinkage or strength development found.

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