Selection Of Binders For In Situ Spinel Refractory Castables
Refractory Castable EngineeringSBPMat
3 Formulation design with in situ spinel formation 530 3 1 Mechanism of in situ spinel formation 531 3 2 Mastering the microstructure to optimize the spinel forming castable properties 537 4 Final remarks 577 5 References 579 6 Further reading 591 Chapter 9 Carbon containing refractory castables design properties and applications 1
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A comparative study between Direct Spinel Addition and
Binary compounds such as tungsten carbide or boron nitride can be very refractory Hafnium carbide is the most refractory binary compound known with a melting point of 3890 °C The ternary compound tantalum hafnium carbide has one of the highest melting points
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Optimization of Properties for Alumina Spinel Refractory
Aiming at optimizing properties of alumina spinel refractory castables coarse corundum particles were replaced partially with the particles of a novel porous multi component CMA CaO MgO Al2O3 aggregate in the same size Properties including the bulk density apparent porosity strength slag corrosion resistance thermal shock resistance and thermal fatigue resistance of alumina spinel
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Selection principle of refractories binderTechnical
Selection principle of refractories binder Apr 24 2020 1 Material matching principle The selected refractories binder should be compatible with the properties of the refractory raw materials used Such as aluminum silicate and corundum non burning refractory products acidic binders such as phosphoric acid aluminum dihydrogen phosphate
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Working Conditions of Different Types of Refractory Castables
Get Free Quote If the furnace shell requires low temperature it is necessary to use double layer insulation to solve it that is first ceramic fiber and then light insulation castable or directly use ceramic fiber block to solve it However if there is a weight requirement in the insulation area use a specific gravity of 0 6 0 8 as the insulation layer
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FIRE Compendium Series Vol 1 Refractory Castable
3 Formulation design with in situ spinel formation 530 3 1 Mechanism of in situ spinel formation 531 3 2 Mastering the microstructure to optimize the spinel forming castable properties 537 4 Final remarks 577 5 References 579 6 Further reading 591 Chapter 9 Carbon containing refractory castables design properties and applications 1
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Steelplant Refractories Containing Alphabond Hydratable
experience that may be applied to fabricating refractory shapes This paper also describes the opportunities gained by using Alphabond as an alumina source to develop in situ bonding in calcia free no cement castables to form mullite and magnesium aluminate spinels No cement castables containing hydratable alumina binders are now being used
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In Situ Spinel Formation in a Smart Nano Structured
In Situ Spinel Formation in a Smart Nano Structured Matrix for No Cement Refractory Castables Dominika Madej and Karina Tyrała Department of Ceramics and Refractories Faculty of Materials Science and Ceramics AGH University of Science and Technology al A Mickiewicza 30 30 059 Krakow Poland ktyrala agh edu
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Spinel In situ versus PreformedClearing the Myth
4 In situ versus preformed spinel The formulation of castables containing pre reacted spinel and that of spinel forming alumina magnesia castables require in gen eral different approaches whereby the for mulation of alumina magnesia castables is in general more challenging The use of mag nesia as one of the reactants for the spinel formation
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Improving in situ spinel refractory castables using a
Phosphate and sulfate binders are also highly regarded because they create adequate chemical bonds between particles of the refractory materials Prior studies have also shown that tripolyphosphate binders can efficiently improve the performance and strength of
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Selection of binders for in situ spinel refractory castables
Calcium aluminate cement CAC is the typical binder used in in situ spinel refractory castables showing benefits such as suitable working setting and demoulding time and also corrosion resistance 8 Nevertheless CAC additions in these castables may lead to further expansion attributed to CA 2 and mainly CA 6 formation 5 9 10
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A comparative study between Direct Spinel Addition and
The major objective of this work is to study the difference in properties of spinel containing high alumina refractory castables prepared by two different methods namely in situ spinelisation and direct spinel addition Also the effect of two different types of cement having different alumina composition was observed
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Slag attack evaluation of in situ spinel containing
Thus this work addresses the slag attack evaluation of four designed in situ spinel containing castables containing hydratable alumina or calcium aluminate cement as a binder source and 0 or 1 wt of silica fume when in contact with a Fe x O rich industrial slag Corrosion cup tests microstructural characterization and a two step thermodynamic simulation model were used in order to investigate the reactions taking place during the slag–refractory
Get PriceWhat are the commonly used additives and binders for
In refractory castables it is often used to add a small amount of additives to achieve the purpose of sintering and improve certain properties of the product Mineralizers are often used to control the formation or reaction of substances TiO2 is a mineralizer commonly used in the synthesis of magnesia alumina spinel
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Improvement in Slag Resistance of No Cement Refractory
The corrosion resistance of spinel containing cement bonded castables has been extensively investigated in the past However corrosion of no cement refractory castables NCC has not been widely studied since the use of NCC has been relatively limited up till now This paper focuses on the slag resistance of NCCs and the often used spinel containing low cement castable LCC is used as the
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In Situ Spinel Formation in a Smart Nano Structured
In Situ Spinel Formation in a Smart Nano Structured Matrix for No Cement Refractory Castables Dominika Madej and Karina Tyrała Department of Ceramics and Refractories Faculty of Materials Science and Ceramics AGH University of Science and Technology al A Mickiewicza 30 30 059 Krakow Poland ktyrala agh edu
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REFRACTORY 96 Proceedings of the International
23 Bauxite MA Spinel Bricks for Ladle 224 Hong Xueqing Yang Xiwen Chen Jiawei Zhang Changli Liu Wenge 24 The Effect of Spinel on the Properties of Corundum Low Cement Castables 230 He Zhiyong Zhang Xiaojun Li Lin 25 Refractory Selection for Stainless Steelmaking Processes 235 Dr Stradtmann Dr Kuhlmann CD Hahn R C Thomas 26
Get PriceSpinel In situ versus PreformedClearing the Myth
selection of the best suited refractory prod uct The sidewall for example has usually less aluminate spinel is a highly refractory mater ial with a melting point of 2135 °C A strong mulating castables with in situ spinel forma tion 4 In situ versus preformed spinel The formulation of castables containing pre
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is exceeded the refractory loses their protection Another approach is to add a phosphate as it imparts highly non wetting properties to the refractory and does not decompose until temperatures >1500oC are reached 13 In brick it was incorporated into the mix prior to fi ring in castables it can be the bonding agent or supplement it and
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Improvement in Slag Resistance of No Cement Refractory
the cement was replaced by the cement free binders Keywords no cement castables slag resistance 1 Introduction 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
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What are the commonly used additives and binders for
Mineralizer refractory castables In castables it is often used to add a small amount of additives to achieve the purpose of sintering and improve certain properties of the product Mineralizers are often used to control the formation or reaction of substances TiO2 is a mineralizer commonly used in the synthesis of magnesia alumina spinel
Get PriceRefractory castables of the new generation in the
M W Vance G W Kriechbaum R A Henrichsen et al Influence of spinel additives on the performance of high alumina and spinel castables in Tech Bull Alcoa Industrial Chemicals November 1994 21 Ladle furnace and refining ladles Prospectus of the RADEX Company 22 Electrical arc furnace Prospectus of the RADEX Company 23
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Improvement in Slag Resistance of No Cement Refractory
This paper focuses on the slag resistance of NCCs and the often used spinel containing low cement castable LCC is used as the reference Three different NCC binders were designed i Al2O3 MgO alumina bond in situ spinel formation ii Al2O3 SiO2 microsilica gel bond mullite formation and iii Al2O3 MgO SiO2 MgO SiO2 bond
Get PriceEvolution of in Situ Refractories in the 20th Century
Feng Wang Pingan Chen Xiangcheng Li and Boquan Zhu Effect of micro spinel powders addition on the microstructure and properties of alumina refractory castables Ceramics International 10 1016/j ceramint 2018 10 049 2018
Get PriceMgO fumes as a potential binder for in situ spinel
MgO fumes as a potential binder for in situ spinel containing refractory castables
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Latest Development in Refractory Monolithics
impact areas purging plugs and well blocks The reduced erosion resistance of in situ spinel formulations will reduce the life and increase operating cost Recently with a combination of pre formed spinel and in situ spinel improvements were obtained on the following castable properties 0 20 0 00 0 20 0 40 0 60 0 80 1 00 1 20
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Selection of binders for in situ spinel refractory castables
The expansive behavior of alumina–magnesia refractory castables is usually associated with in situ spinel formation Nevertheless when bonded with calcium aluminate cement CAC this class of materials can present additional expansion reactions due to CA 2 and CA 6 formation Considering that these reactions impart a further contribution to the material s overall volumetric change the objective of this work has
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Spinel s springIndustrial Minerals
In China research has indicated that in situ spinel is favouring refractory performance such as is in alumina magnesia castables for steel ladles But Prof Zhou Ningsheng warned Nevertheless the hydration of magnesia remains a concern or a problem
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Investigations on the properties of Al2O3–MgO refractory
In situ carbon containing calcium aluminate cement CCAC was ground and used as binders for Al 2 O 3 –MgO refractory castables and its carbon content determined by an infrared carbon–sulfur analyzer HCS 140 was 1 45 For comparison Secar71 supplied by Kerneos China S71CB prepared by mechanical mixing with carbon black and Secar71 composite powders with a carbon
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What are the commonly used additives and binders for
Mineralizer refractory castables In castables it is often used to add a small amount of additives to achieve the purpose of sintering and improve certain properties of the product Mineralizers are often used to control the formation or reaction of substances TiO2 is a mineralizer commonly used in the synthesis of magnesia alumina spinel
Get PriceSelection principle of binder for refractory materials
The selection principles are as follows The nature of the binder must be compatible with the properties of the refractory material being bonded Acidic neutral and weakly alkaline binders are available for acidic and neutral refractories For alkaline refractories acidic binders cannot be used directly
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Recent advances in refractories aluminate binders and
shotcreting The selection of calcium aluminate binders must be considered carefully in the quest to optimize performance and instal lation success of refractory monolithics The paper discusses recent advances in aluminate binders for high performance castables A specific focus will be the key issues that impact the reliability and
Get PriceWorking Conditions of Different Types of Refractory Castables
Get Free Quote If the furnace shell requires low temperature it is necessary to use double layer insulation to solve it that is first ceramic fiber and then light insulation castable or directly use ceramic fiber block to solve it However if there is a weight requirement in the insulation area use a specific gravity of 0 6 0 8 as the insulation layer
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