The Corrosion Of Refractory Castables Request Pdf
Study on the effect of different sols on high alumina
2 1 Refractory materials 19 2 2 Types of refractories 20 2 3 Refractory castables 20 2 4 Bonding mechanism in castables 21 2 5 Sol Gel bonding in castablesColloidal binders 29 2 6 Silica sol The only commercially used colloidal binder 31 2 7 Alumina sol 32
Get Price
Improved corrosion resistance of Al2O3‐SiC‐C castables
Slag corrosion is one of the main damage modes for refractory castables used in iron and steel metallurgy The matrix plays vital roles for corrosion resistance of refractory castables In the present paper the properties of the Al 2 O 3 SiC C based trough castables with in situ carbon containing calcium aluminate cement CCAC and ball pitch
Get Price
Effects of SnO2 Addition on the Properties of Alumina
Alumina magnesia refractory castables have been widely used in the wall and bottom impact pad of steel ladles The properties of alumina magnesia refractory castables with SnO 2 additive in 05 wt range were investigated The phase composition microstructure physical and mechanical properties of these refractories were studied
Get Price
DOC Monolithic Refractory Erosion corrosion Thermal
The Marangoni effect plays an important role in the local refractory corrosion at the slag metal interface A growing demand for refractory castables with advanced properties has given rise to a continuous technological evolution and highlighted the necessity for secondary raw materials reapplication even in refractory industry
Get Price
Improved Corrosion Resistance of Al 2 O 3 SiC C Castables
In order to improve the corrosion resistance of Al2O3 SiC C castables super fine TiO2 SFT powder was added directly to the castable with the aim of synthesizing TiC/TiN through in situ reactions Thermodynamic calculations carried out by FactSage suggested that it was possible to synthesize TiC/TiN through in situ reactions Analysis performed by X ray diffraction XRD and a scanning
Get Price
SciELOBrasilThe effect of microsilica and refractory
The bonding system in low cement castables is achieved by the use of calcium aluminate cement microsilica and reactive alumina The lime/silica ratio critically impacts the liquid phase formation at high temperatures and subsequently the corrosion resistance and the mechanical and physical properties of the refractory
Get Price
The corrosion of refractory aggregates by molten aluminum
The use of a nonwetting additive is not always a sufficient solution to improve the corrosion resistance of refractories against molten aluminum Once in contact with liquid aluminum the coarse refractory aggregates which do not benefit from the nonwetting additives in the matrix may be corroded In some cases the corrosion of aggregates promotes corrosion in the surrounding matrix even
Get PricePhysical and mechanical properties of low ultralow and
refractory castables are able to present creep and corrosion resistance similar to formed refractories of the same class 1 2 The advantage of using the hydratable alumina as a binder is that it does not need to be cured under high relative humidity When hydratable alumina reacts with
Get Price
Reasons for crack propagation and strength loss in
blems due to the addition of each raw material to a batch of refractory castables after curing and drying at 110°C as well as due to the firing of castables containing these materials In the final section suggestions are made for the production of large heavy weight blocks e g
Get Price
High Performance Castable Refractories for Cupola
The trend in refractory monolithic design has long been aimed towards reducing the cement content of the compositions Concurrently refinement of the particle size distribution additives and dispersants used have been optimised over the years As a result excellent properties of ultra low cement castables have been achieved
Get Price
Improvement in Slag Resistance of No Cement Refractory
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 low cement castables LCCs have been widely used for steel ladles 1 Many
Get Price
Alumina Rich Castables Microstructural and
alumina and calcium hexa aluminate based ones and their influences on the corrosion behavior 2 Materials and Methods 2 1 Refractory Materials Two types of matrix from refractory castables with comparable microstructures and di erent mineral compositions were targeted This allowed us to isolate the e ect of calcium hexa aluminate as a
Get PriceCorrosion Mechanism Analysis of Al2O3 SiC C Castable
The present study aims to analyze the corrosion mechanism of Al2O3 SiC C castables for blast furnace main trough The anti oxidation and corrosion properties of the castable caused by slag were studied with residual lining investigation and microstructure analysis A rapid recognition of grain distribution ingredients and mineral phases was achieved by using cathodoluminescence CL in
Get PriceCORROSION TESTS FOR REFRACTORY MATERIALS
Corrosion tests for refractory materials intended for the steel industryA reiew CeramicsSilikáty 64 3 2020 279 with the precipitation of new phases at the surface of the refractory brick The former direct dissolution mode is usually faster and more aggressive than the latter indirect
Get Price
Improvement in Slag Resistance of No Cement Refractory
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 low cement castables LCCs have been widely used for steel ladles 1 Many
Get Price
CA6 impact on the corrosion behavior of cement bonded
This work focuses on the evaluation of the corrosion behavior of Al 2 O 3 –MgO cement bonded castables based on thermodynamic calculations in order to understand the reaction steps and some scientific and technological issues that still need to be better explained when such materials come into contact with basic industrial slags at high temperatures
Get Price
Low Cement High Alumina Castables Effect of
based on Calcium Aluminate Cements Refractory castables which are used by casting method are premixed combinations of refractory grain matrix components bonding agents and additives The proportions of each component used vary in each castable composition to achieve the desired properties essentially required for the intended application
Get Price
The corrosion resistance of microsilica containing Al2O3
In order to evaluate the microsilica role on the corrosion resistance of cement bonded refractory castables containing in situ or pre formed spinel four compositions were selected as shown in Table I AM 0MS and AM 1MS compositions are alumina–magnesia in situ spinel forming castables differing only regarding the microsilica 971 U Elkem Materials Norway content 0 and 1 wt
Get Price
PDF Recent advances in refractoriesaluminate binders
References indicate that the first refractory concretes can be traced as far back as 1856 when Deville 1856 prepared a refractory crucible using alumina aggregate and alumina cement Calcium aluminate cement CAC and a method for its industrial production were patented by Lafarge in 1908 Soc J A Pavin de Lafarge 1908 The first industrial production of calcium aluminate cement
Get Price
Effect of different additives on the properties of alumina
traditional refractory bricks in many steel making applications such as the EAF electronic arc furnace roof 1 Castables should be used in the electronic arc furnace roof which cover various requirements such as cyclic thermal treatment high temperature and corrosion by slag and smoke respectively The alumina spinel castables
Get Price
Improved corrosion resistance of Al2O3‐SiC‐C castables
Slag corrosion is one of the main damage modes for refractory castables used in iron and steel metallurgy The matrix plays vital roles for corrosion resistance of refractory castables In the present paper the properties of the Al 2 O 3 SiC C based trough castables with in situ carbon containing calcium aluminate cement CCAC and ball pitch
Get PricePDF The Optimisation of Magnesia Containing Castables
Studies by Kantani and Imaiida 3 have shown that the best compromise between ladle slag penetration and corrosion resistance can be achieved when the castable contains about 20–40 magnesium aluminate spinel after firing The spinel can either be added as pre reacted spinel or formed in situ by adding magnesia to the castable Furthermore it was discovered that the penetration resistance
Get PriceTHE EFFECT OF NANO TITANIA ADDITION ON THE
Generally refractory castables can be considered as composites with the aggregates >100 μm fine 1 100 μm and superfine <1 μm refractory grains together with bonding phase being the matrix 6 The most common binder used in refractory castables is calcium aluminate cement CAC Refractory castables are mixed with water
Get Price
Review of Matrix Aluminas for Refractory Formulations
were used in refractory formulations in both shaped and unshaped products At that time the flow properties of castables were enhanced by the use of silica fume This was followed later by the development of fully ground reactive aluminas which contributed to the design of the matrix below 63µm
Get Price
Corrosion resistance of alumina magnesia castable to
Key words Refractory Corrosion resistance Castable Slag Steel ladle Received June 10 2011 Accepted August 30 2011 1 Introduction Alumina magnesia castables have been used as refractory for lining steel ladles 1 2 The castables are composed of alumina aggregates and fine grain matrix consisting of alumina magnesia
Get Price
The corrosion of refractory aggregates by molten aluminum
The use of a nonwetting additive is not always a sufficient solution to improve the corrosion resistance of refractories against molten aluminum Once in contact with liquid aluminum the coarse refractory aggregates which do not benefit from the nonwetting additives in the matrix may be corroded In some cases the corrosion of aggregates promotes corrosion in the surrounding matrix even
Get PriceAcid Resistance CastableRongsheng Refractory
Acid Resistant Castables Definition The acid resistant castable is made up of 60 70 of acid resistant aggregate 30 40 of powder and 13 16 of sodium silicate solution with density of 1 38 1 42g/cm3 When the agent is added the amount of the refractory material which is 10 to 12 of the mass of the sodium silicate solution and which is
Get Price
Effects of SnO2 Addition on the Properties of Alumina
Alumina magnesia refractory castables have been widely used in the wall and bottom impact pad of steel ladles The properties of alumina magnesia refractory castables with SnO 2 additive in 05 wt range were investigated The phase composition microstructure physical and mechanical properties of these refractories were studied
Get PriceAlkalic corrosion of castablesCORE
Alkalic corrosion of castables One entire chapter details the corrosion of refractory concrete which we want to minimize All types of corrosion are described here and the manner of their formation and subsequently some corrosion tests To submit an update or takedown request for this paper please submit an Update/Correction/Removal
Get Price
Enhanced slag resistance of magnesia refractory castables
1 Introduction Magnesia refractory castables are widely used in continuous casting tundish and cement rotary kilns owing to their high refractoriness and corrosion resistance against basic slag However their low resistance to slag penetration weakens the service performances and the resultant service life in the above mentioned high temperature industrial fields
Get Price
Acid Resistance CastableRongsheng Refractory
Acid Resistant Castables Definition The acid resistant castable is made up of 60 70 of acid resistant aggregate 30 40 of powder and 13 16 of sodium silicate solution with density of 1 38 1 42g/cm3 When the agent is added the amount of the refractory material which is 10 to 12 of the mass of the sodium silicate solution and which is
Get Price
CA6 impact on the corrosion behavior of cement bonded
This work focuses on the evaluation of the corrosion behavior of Al 2 O 3 –MgO cement bonded castables based on thermodynamic calculations in order to understand the reaction steps and some scientific and technological issues that still need to be better explained when such materials come into contact with basic industrial slags at high temperatures
Get PriceOptimization of Properties for Alumina Spinel Refractory
spinel refractory castables containing CMA aggregates were evaluated contrastively The results demonstrated that the incorporation of CMA aggregates can significantly improve thermal shock resistance and thermal fatigue resistance of castables although companying with slight decrease in the bulk density and strength
Get Price
Research on the Mathematical Models for Refractory
In this paper refractory castables was used for the simulated erosion experiment of RH snorkel in the laboratory then these data which were got from experiment were analyzed by using spss software and two mathematical models at slag gas interface and slag steel interface of refractory castables were obtained this models established two relations between slag compositions and erosion degree
Get Price
CORROSION MECHANISMS IN REFRACTORY CASTABLES
CORROSION MECHANISMS IN REFRACTORY CASTABLES BY LIQUID OXIDES L Tadeo Ibarra1 A M Guzmán1 D I Martínez1 G Alan Castillo1 1Faculty of Mechanical and Electrical Engineering Autonomous University of Nuevo Leon Pedro de Alba S/N Cd Universitaria San Nicolás de los Garza Nuevo León
Get Price
Research on the Mathematical Models for Refractory
In this paper refractory castables was used for the simulated erosion experiment of RH snorkel in the laboratory then these data which were got from experiment were analyzed by using spss software and two mathematical models at slag gas interface and slag steel interface of refractory castables were obtained this models established two relations between slag compositions and erosion degree
Get Price
