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iraq spinel castables

Magnesium Aluminate Spinel Raw Materials for High

202247 Fig 3 shows the results of a slag corrosion test of various alumina and aluminaspinel castables in an induction furnace available in western desert of

PDF Corrosion of Corundum–MgAl2O4 SpinelBased

20211129 Corundum–MgAl 2 O 4 spinelbased castables bonded with calcium aluminate cement CAC and hydratable alumina HA were studied to evaluate their performance as gas purging plugs in steel ladles The thermomechanical properties and corrosion behavior of the asprepared castables were investigated The results indie that the cold crushing strength and

Effect of different additives on the properties of alumina

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 aluminaspinel castables show good properties such as high modulus of rupture low porosity high density good resistance to thermal sock high

Applied Sciences Free FullText Fundamental

This study investigated the effect of the CaO/SiO2 mass ratio of steel slag on the corrosion behavior of spinelforming aluminabased castables with a content of MgO 3–7 wt Equiweight mixtures of castables and slags were calculated by FactSage observed by HMTA fired at 1350 °C and investigated by XRD From these results we conclude that the presence of SiO2rich

Thermal Expansion Characteristics of Alumina–Magnesia

20041220 The thermal expansion of Al 2 O 3 MgO castables containing 55 wt MgO and 136 wt CaO and Al 2 O 3 spinel castables containing 20 wt spinel having 95 wt Al 2 O 3 and 17 wt CaO was measured in the temperature range of 8001650°C by dilatometry A sharp increase in expansion from around 1425° to 1525°C followed by a sharp decrease with further

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Corrosion of high alumina spinel castables by steel ladle

alumina spinel castables sintered at 1500 and 1600uC against steel ladle slag have been examined Samples of alumina spinel castables were chosen with two different

Fabriion and characterization of anodic aluminum

202176 The corrosion mechanism of aluminaspinel castables with CMA aggregates addition has been demonstrated by Wöhrmeyer et al The results indied that a thin densified zone formed and blocked the slag penetration into the porous matrix and the porous aggregates However the comprehensive performance of castables was critical for the appliions

The Impact of In SituFormed Spinel on the Porosity of No

The paper focuses on the determination of how insitu formed magnesiaalumina spinel MA spinel content in corundum refractory castables influences the final properties and pore size distribution of nocement refractory castables The motivation for this research was the continued pressure on increasing the utility properties of refractory castables namely their corrosion

Aggregate Effects on the Thermal Shock Resistance of

The performance of spinel forming refractory castables is mainly related to their slag corrosion and thermal shock behaviors Concerning the thermal shock resistance the aggregate selection is an important issue as it can reduce the crack propagation and refractory damage Therefore this work addresses the effect of different aggre

PDF SpinelCoated Graphite for Carbon Containing

J Am Ceram Soc 92 8 1895–1900 2009 DOI 101111/j15512916200903133x r 2009 The American Ceramic Society Journal SpinelCoated Graphite for Carbon Containing Refractory Castables Sunanda Mukhopadhyayw Sarbasree Dutta Sheikh A Ansar Sumita Das and Susmita Misra Department of Chemical Technology University of Calcutta Kolkata 700 009

PDF Spinelcontaining aluminabased

202244 Due to their high corrosion resistance to basic slags either preformed or in situ spinel MgAl2O4 containing refractory castables are nowadays

PDF Study of SpinelContaining High Alumina Castable

The XRD patterns at aient temperature and at 1500 degrees C showed that the spinel in the Al2O3MgO castables fired at 1500 degrees C for 3 h

Optimization of magnesiabased cementfree spinel

The optimization of magnesiabased cementfree and spinel bonded MgOAl2O3 castables with more than 70 magnesia and 5 hydratable alumina as binder has been conducted The major aspects which have been covered during this study are flowability volume stability physical and mechanical properties and corrosion resistance Flowability tests have been carried out to

Insulating Castable RS Refractory Castable

Insulating castable is the refractory castable with low bulk density high porosity and sound insulating performance in Rongsheng refractory materials manufacturerInsulating castables is made of highquality aggregate super

Corrosion of high alumina spinel castables by steel ladle

201863 2006 Corrosion of high alumina spinel castables by steel ladle slag Ironmaking Steelmaking Vol 33 No 2 pp 151156

Fabriion of Microporous CorundumSpinel Refractory

Microporous corundumspinel castables with high strength and low thermal conductivity have been fabried by foamgelcasting methods A systematical investigation on different properties of samples such as porosity pore size distribution thermal conductivity cold modulus of rupture and cold crushing strength has been taken in this paper and scanning electron microscopy

Corrosion of high alumina spinel castables by steel ladle

201863 2006 Corrosion of high alumina spinel castables by steel ladle slag Ironmaking Steelmaking Vol 33 No 2 pp 151156

PDF Post mortem study of aluminaspinel castables of an

refractories in many steelmkaing appliions One of the most common spinel only In table 1 the chemical compounds added in alumina castables in composition of the aluminaspinel castable a family of mixed oxide spinels is a is given magnesiaalumina spinel Mg Al2O4 having a

Thermal Expansion Characteristics of Alumina–Magnesia

20041220 The thermal expansion of Al 2 O 3 MgO castables containing 55 wt MgO and 136 wt CaO and Al 2 O 3 spinel castables containing 20 wt spinel having 95 wt Al 2 O 3 and 17 wt CaO was measured in the temperature range of 8001650°C by dilatometry A sharp increase in expansion from around 1425° to 1525°C followed by a sharp decrease with further

Reaction behavior of slag and spinel in steel ladle castables

In the present work the spinel phase in ASp and AM castables was analyzed in detail The reaction behavior between spinel and slag was investigated and the high durability of AM castable for slag penetration and corrosion was discussed 2 Experiments 21 Preparation of ASp and AM castables The formulations of ASp and AM castables used

Volume Stability of SpinelBonded Magnesia Castables

Volume Stability of SpinelBonded Magnesia Castables p1818 StrengthCompositionMicrostructure Relationships in Silicon Nitride Bonded Silicon Carbide Refractory Materials p1821 Alumina Refractory Masses Hardened at Normal Temperatures by Coagulation p1825 Ceramic Materials in the System ZrO 2TiO

Optimization of Properties for AluminaSpinel Refractory

202163 1 Introduction Aluminamagnesia and aluminaspinel castables have been widely used in steel ladle linings below the slag zone the well block of purging plugs and injection lances due to their excellent slag resistance and mechanical properties 12In view of the increasing ratio of scrap to steel higher working temperature and prolonged refining time the

Thermal Shock Resistance of SilicaFree Alumina–Spinel

2021224 Physical Properties The comparison of change in BD AP MOR and PLC with 2–10 cement bonded alumina–spinel castables at different temperature are given in Fig 1a–d As expected the MOR of the castables continuously increase with the increase in CAC content after drying at 110 ℃ for 24 h Fig 1c This improved castable strength with the higher CAC

Optimization of magnesiabased cementfree spinel

The optimization of magnesiabased cementfree and spinel bonded MgOAl2O3 castables with more than 70 magnesia and 5 hydratable alumina as binder has been conducted The major aspects which have been covered during this study are flowability volume stability physical and mechanical properties and corrosion resistance Flowability tests have been carried out to

Corrosion of Corundum–MgAl2O4 SpinelBased Castables

20211129 Corundum–MgAl2O4 spinelbased castables bonded with calcium aluminate cement CAC and hydratable alumina HA were studied to evaluate their performance as gas purging plugs in steel ladles The thermomechanical properties and corrosion behavior of the asprepared castables were investigated The results indie that the cold crushing strength and modulus