Improvement in Slag Resistance of No-Cement Refractory
Due to the excellent corrosion resistance to basic slags and good thermo-mechanical properties either in situ forming or pre-formed spinel (MgAl2O4) containing cement bonded refractory castables (low cement castables (LCCs)) have been widely used for steel ladles.
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Analysis and Prediction of Corrosion of Refractory
Oct 23 2020 · Yoshikawa et al. 11 studied the erosion resistance of MgO-based spinel and Al 2 O 3 -based spinel refractories and found that these two refractories can replace Al 2 O 3 -Cr 2 O 3 refractories with low chromium content and are more suitable for alkali furnaces.
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urn nbn se kth diva Improvement of Resistance of
Improvement of Resistance of MgO-Based Refractory to Slag Penetration by In Situ Spinel Formation Wang Huijun KTH School of Industrial Engineering and Management (ITM) Materials Science and Engineering Micro-Modelling.
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Steel Ladle Al2O3-MgO-C RefractoryRS Kiln Refractory Bricks
Steel Ladle Al2O3-MgO-C Refractory Description With the rapid development of steel smelting technique especially with the application of continuous casting and out furnace refining techniques the requirement on ladle refractory material is much higher. So chemical corrosion resistant scouring resistant slag erosion resistant thermal shock resistant and high mechanical strength refractory
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Oxidation Mechanism of C in MgO–C Refractory Bricks
Hassan Gheisari Dehsheikh Salman Ghasemi-Kahrizsangi Performance improvement of MgO-C refractory bricks by the addition of Nano-ZrSiO 4 Materials Chemistry and Physics 10.1016/j.matchemphys.2017.09.055 202 () (2017).
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Improvement of Resistance of MgO-Based Refractory to Slag
Apr 01 2015 · MgO- in situ spinel substrate was prepared at 1773 K (1500 °C) using colloidal alumina suspension and coarse MgO as raw materials. While the addition of 10 mass pct colloidal alumina had limited effect addition of 20 mass pct colloidal alumina into the MgO matrix improved greatly the resistance of the substrate against the slag penetration at 1873 K (1600 °C). The improvement was
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New trends in monolithic refractoriesBioKeram
Due to their high refractoriness mechanical strength thermal shock and corrosion resistance MA (MgAl2O4) spinel containing refractories are increasingly finding new applications and new types of spinel-containing refractories are being developed.
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Production and properties of refractory raw materials
this reason refractory materials based on andalusite either raw or calcined exhibit porosity significantly lower than bauxite or chamotte. When applied in castables this specific behavior of andalusite results in an improved corrosion resistance as well as a lower water demand.
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1.2 MgO-C Refractory MgO-C brick is a composite material based on MgO and C and bonded with high carbon containing pitch and resin with some metallic powder as anti-oxidants to protect the carbon. MgO-C bricks are made by high pressure. These bricks show excellent resistance to thermal shock and slag corrosion at elevated temperatures.
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Improvement in Slag Resistance of No-Cement Refractory
Due to the excellent corrosion resistance to basic slags and good thermo-mechanical properties either in situ forming or pre-formed spinel (MgAl2O4) containing cement bonded refractory castables (low cement castables (LCCs)) have been widely used for steel ladles.
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Proceedings of the Unified International Technical
DANA G. GOSKI PHD is the Director of Research at Allied Mineral Products in Columbus Ohio. Dr. Goski earned her PhD in Engineering from Dalhousie University Canada. She is a member of The American Ceramic Society s (ACerS) Refractories Division a co-inventor on a number of international patents and an ardent supporter of science and engineering educational outreach activities.
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USARefractory compositionGoogle Patents
A refractory composition which is suitable for forming a sliding gate to be used at the bottom of a ladle or tundish is provided. The refractory composition comprises 10 to 30 parts by weight of an alumina-magnesia spinel material containing 40 to 70 by weight of Al 2 O 3 25 to 60 by weight of MgO and 10 or less of impurities and 70 to 90 parts by weight of a magnesia material containing
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Basic Shaped RefractoriesIspatGuru
Based on the conditions used and the quality of the raw materials this can produce materials with MgO contents between around 85 to 98 . For refractory applications besides MgO lime silica and iron contents are also critical.
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Microsilica-bonded magnesia-based refractory castables
submicrometric particles necessary to improve the flow of the castable and to improve the bond of the castable. The three acids are very effective in inhibiting the formation of magnesium hydroxide but affect negatively flow properties and mechanical resistance after cure.
Chat OnlineSteel Ladle Al2O3-MgO-C RefractoryRS Kiln Refractory Bricks
Steel Ladle Al2O3-MgO-C Refractory Description With the rapid development of steel smelting technique especially with the application of continuous casting and out furnace refining techniques the requirement on ladle refractory material is much higher. So chemical corrosion resistant scouring resistant slag erosion resistant thermal shock resistant and high mechanical strength refractory
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Improvement of Resistance of MgO-Based Refractory to Slag
Jan 06 2015 · As a substitute of carbon-bonding MgO·Al 2 O 3 spinel offers a good improvement in both physical and chemical properties of MgO-based refractories such as densification slag penetration resistance and thermal shock resistance. 10 A A number of researchers have focused on the corrosion behavior between spinel-MgO and slag.
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Abstract. Interactions between smelting reduction slags containing titania (0·2-20 wt- TiO 2) and MgO-C refractories have been investigated by stationary immersion and rotary immersion at temperatures of K.The relationship between the concentration of TiO 2 in the slag and the corrosion rate of the refractories the effects of slag basicity (CaO/SiO 2) and the effect of the
Chat OnlineImprovement of Resistance to Slag Penetration in Magnesia
Jun 01 2016 · By addition of colloidal alumina three different particle sizes of dead burnt MgO were employed as raw materials to prepare MgO-based spinel substrates at 1773 K (1500 °C). It was found that the particle size of MgO as well as its size distribution had substantial impact on the resistance of the refractory to the slag penetration at 1873 K (1600 °C).
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Improvement of the refractory lining in the LD- converter
A main part to increase the production in the steel plant was to improve the refractory lifetime of the LD converters. The preparation of Al-AlN bonded corundum based refractory by in situ reaction. Zhu Boquan / Fang Binxiang Ladle heating procedure and its influence on the oxidation resistance of MgO-C refractories. Volkova Olena
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1.2 MgO-C Refractory MgO-C brick is a composite material based on MgO and C and bonded with high carbon containing pitch and resin with some metallic powder as anti-oxidants to protect the carbon. MgO-C bricks are made by high pressure. These bricks show excellent resistance to thermal shock and slag corrosion at elevated temperatures.
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Proceedings of the Unified International Technical
DANA G. GOSKI PHD is the Director of Research at Allied Mineral Products in Columbus Ohio. Dr. Goski earned her PhD in Engineering from Dalhousie University Canada. She is a member of The American Ceramic Society s (ACerS) Refractories Division a co-inventor on a number of international patents and an ardent supporter of science and engineering educational outreach activities.
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Improvement of oxidation resistance in graphite for MgO
Improvement of oxidation resistance in graphite for MgO−C refractory through surface modification Geun-Ho CHO 1 Eun-Hee KIM 1 Jing LI Je-Hyun LEE Yeon-Gil JUNG Yun-Ki BYEUN 2 Chang-Yong JO3 1. School of Materials Engineering Changwon National University Changwon Gyeongnam Korea 2.
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Production and properties of refractory raw materials
outstanding thermal shock resistance of an-dalusite based refractory products. Refractoriness under load The hot behavior of a refractory material is strongly dependent on the mineralogical Refractory properties and performance Given the high alumina content the per-formance of andalusite based products is often compared to mullite and bauxite.
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Production of MgO-X Refractory Material with Cellular
The oxidation resistance of the MgO-C refractory bricks with CaB 6 and Al or Al-Mg alloys is improved because a layer of low porosity is formed in the surface of the material. This layer constitutes mainly of MgO B 2 O 3 formed from MgO reaction with B 2 O 3 16 . The main benefit of the addition of more than one species of anti-oxidant is the
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New trends in monolithic refractoriesBioKeram
Due to their high refractoriness mechanical strength thermal shock and corrosion resistance MA (MgAl2O4) spinel containing refractories are increasingly finding new applications and new types of spinel-containing refractories are being developed.
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showed a potential solution to improve the resistance of MgO-based refractor y to slag pene- tration and to improve steel cleanness. DOI 10.1007/s
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A Review on Recent Advances on Magnesia-Doloma
resistance MgO-CaO refractories are widely used in ferrous non-ferrous and cement industries. However in spite of these advantageous properties the application of MgO-CaO refractory bricks have not been popular due to their tendency to hydration when exposed to the atmosphere 5-10 . Recently Nano-technology was introduced to
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Study of Al2O3 MgO Refractory Castables Corrosion by
In order to understand the wear mechanisms of refractory materials several recipes were tested from a corrosion slag resistance and thermal shock point of view. The results show that the corrosion is extremely limited at the interface slag/refractory for all cases.
Chat OnlineA Review on Recent Advances on Magnesia-Doloma
resistance MgO-CaO refractories are widely used in ferrous non-ferrous and cement industries. However in spite of these advantageous properties the application of MgO-CaO refractory bricks have not been popular due to their tendency to hydration when exposed to the atmosphere 5-10 . Recently Nano-technology was introduced to
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Investigations on the properties of Al2O3–MgO refractory
Aug 15 2018 · Nowadays steel ladle linings below the slag line are usually casted by the calcium aluminate cement bonded Al 2 O 3 –MgO refractory castables due to their improved corrosion resistance and slag penetration resistance associated with the in situ formation of MgAl 2 O 4 spinel in the refractory castables 1–4 but the other parts are constructed with MgO–C refractory bricks.
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