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The results show that, for different magnesia, the carbon footprints are 3.937–4.804 kgCO2-eq/kg of fused magnesia, 2.151–3.064 kgCO2-eq/kg of sinter magnesia and 1.440–2.221 kgCO2-eq/kg of ...
Abstract. Recycling of used refractories – in particular closed-loop recycling – gains in importance because of both ecological and economic benefits, such as the conservation of natural resources, reduced landfilling, and the reduction of greenhouse …
The corrosion behaviour of a pitch-bonded magnesia-carbon refractory by an Al2O3 rich (∼15 wt.%) stainless steelmaking slag was investigated by rotating finger tests in a vacuum induction ...
Abstract. Two magnesia-carbon (MgO–C) recyclates were investigated with respect to their utilization as raw materials for MgO–C refractories. X-ray diffraction and …
Recently, Cho et al. [58] performed the experimental study on the corrosion of two typical types of RH refractories, magnesia-carbon, and magnesia-chromite refractories against five different slags at 1600 °C to understand the refractory degradation mechanisms during the RH process: a typical ladle slag, two FeO-rich slags containing 20 and 40 ...
3 Citations. Metrics. A Correction to this article was published on 15 June 2022. This article has been updated. Abstract: This paper reviews the raw materials, …
In 2014, the five production chains of the main magnesia refractory raw materials in Dashiqiao released 13.76 million t GHGs, in which the single-phase process fused magnesia accounted for 24%, while the caustic calcined magnesia and the middle grade dead-burned magnesia for 23% and 23%, respectively.
Magnesia-carbon (MgO-C) bricks have been among the first refractory bricks to be recycled since the mid-90s (Arlt and König, 1998). The working lining of EAF are …
... The benefits of recycling include reduced consumption of natural raw materials, energy savings, less dependence on raw material suppliers, reduced waste to …
The results of this study show that the carbon emissions of repair refractory (magnesia-carbon spray) are much lower than those of the working lining (magnesia-carbon brick). ... The new technology of producing high purity active magnesium oxide with external heating rotary kiln and recycling carbon dioxide. Environ. Prot. and Circ. Econ, …
The results showed that production process was the main phase of carbon emissions of magnesia products production. LCA has been widely used in refractory material recovery, magnesium refractory, and the single process of refractory production. However, there is no LCA study focusing on the Al 2 O 3 –C refractory production.
According to estimates based on 2014 data, the direct carbon footprint resulting from the production of all magnesia products was over 1.66 × 10 7 t CO 2 −eq and the indirect carbon footprint was greater than 1.79 × 10 7 t CO 2 −eq. Therefore, this industry has a large environmental impact on the Liaoning region.
composite refractory, it benefits from the combined properties of magnesia and carbon. High-purity magnesia aggregates (fused as well as sintered), graphite as a carbon …
Investigation of recycled magnesia-carbon aggregate obtained with omitting carbon-removal step Unified International Technical Conference on Refractories (UNITECR …
Utilization of Recycled Material for Producing Magnesia–Carbon Refractories. by. Kirsten Moritz. *, Nora Brachhold., Jana Hubálková., Gert Schmidt. and. Christos G. Aneziris. Institute of …
Mag – carbon used bricks : In the context of non availability of high purity magnesite in India this recycled raw material has become strategic for Indian magnesia carbon refractory product ...
Recycling of waste magnesia refractory brick powder in preparing magnesium phosphate cement mortar: Hydration activity, mechanical properties and long-term performance. ... Characterization of alumina-magnesia-carbon refractory bricks containing aluminium and silicon. Ceramics International, Volume 44, Issue 8, 2018, pp. …
Conclusions. In the presented study, MgO- and MgO-ZrO 2 refractory ceramics made from secondary magnesia clinker obtained from fired spent magnesia-carbon refractories were compared with materials obtained in a traditional way – from commercial raw materials. It has been found that spent MgO-C refractories can be …
Several studies have already been conducted on the recycling of refractory materials. Recycling of MgO refractories from electric arc furnaces was studied by Lule-Gonzalez et al. (2005), the …
The mechanical behavior of magnesia–carbon (MgO–C) refractory materials containing 4, 11, and 19 wt% carbon was investigated by Hertzian indentation tests. No microstructural changes were ...
Recycling of spent refractories could constitute an important new secondary source of refractory raw materials. It is estimated that up to 20% of raw material demand could be met by secondary resources. But although recycling of refractories has increased significantly in Europe in the last decades, it has still far from reached this target.
Therefore, research on introducing nano-carbon in oxide–carbon refractory is going on to obtain high grade low-carbon steel without affecting the refractory properties. Functional refractory components for continuous casting such as slide gate plate, shroud, and submerged entry nozzles include Al 2 O 3 –C/ ZrO 2 –C. Incorporation of non ...
The basis for the structure is for the material to be named according to their alumina or magnesia classification. Although there are a few exceptions. Below is a breakdown of the new naming structure: ... Alumina Carbon ISO: AMC: Alumina Mag Carbon 65: SG Alumina: Alumina Carbon 80: ASC: ... Sustainable Refractory …
Started in the year 2000, Ginni Refractories Pvt. Ltd. is the leading manufacturer of calcined magnesia carbon / High grade in India meeting the requirement of various refractories manufacturing finished goods for various cement, steel and glass plants from manufacturing magnesia carbon to recycling various refractory bricks for converting scrap into …
In this work, the use of a magnesia-carbon (MgO-C) recyclate for the production of MgO-C refractories is investigated. Using fused magnesia, the mentioned MgO-C recyclate, graphite, novolak, and a modified coal tar pitch, test specimens with different recyclate contents (0, 40, 65, and 82 wt%) were prepared on a laboratory scale.
Table 8 compares the average results from EAF's #3 and #4. 224. Figs. 10–12 225. of MgO in the furnace recycling refractory was 9.1% whereas in the furnace with the regular. 226. practice the ...
First Chinese MgO-C refractory plant in US: PRCO America to use high purity Tibet magnesia source Liaoning magnesia supply hit by new dynamite ban The US refractories market is to have its first Chinese-owned magnesia-carbon brick plant, possibly operational by the end of 2020, and consuming recently developed high purity magnesia …
Highlights. •. Magnesia-carbon (MgO-C) refractories are used in the steel industry, where, after their life cycle, they are replaced by new ones. Consequently, a large amount of spent MgO-C is produced and stored in landfills. This waste may be re-used as a potential source of secondary magnesia. In this study, calcined MgO-C waste was used ...
Moreover, the recycling of MgO-C refractories will support sustainable development and the closed circle economy as both magnesia and graphite belong to …
Spent magnesia (MgO)-carbon refractory bricks were repurposed as a permeable reactive barrier reactive media to treat a nickel (5 mg l −1)- and cobalt (0.3 mg l −1)-contaminated groundwater.MgO has been used for decades as a heavy metal precipitating agent as it hydrates and buffers the pH in a range of 8.5–10 associated with …
These bricks, containing up to 10 wt. % of carbon, are the optimal refractory material for the zone of the molten slag attack. The MgO-C bricks consist of sintered magnesia bound 1 Beatrice Plešingerová, Pavol Vadász, The Technical University of Košice, Faculty of Materials, Metallurgy and Recycling, Metallurgy
The development of scientific bases for obtaining new domestic carbon-containing refractory materials using fundamentally new techniques and methods with the involvement of local mineral raw ...
Introduction. Magnesia–carbon (MgO–C) refractories are widely used as lining material for steelmaking applications, such as in Linz–Donawitz converters, electric arc furnaces, and secondary refining furnaces [1], [2], [3].MgO is commonly used as a basic refractory material due to its high melting point and high corrosion resistance—it is able …
Recycling of refractory bricks used in basic steelmaking: a review ... Heightening mechanical properties and thermal shock resistance of low-carbon magnesia-graphite refractories through the catalytic formation of nanocarbons and ceramic bonding phases ... silicon and aluminum antioxidants on microstructure and mechanical …