mechanism reaction between materials anddirect mineralogical composition of a mgo c refractory
Hydration mechanisms of magnesia-based refractory bricks
Oxide MgO A1 2 0 3 Si0 2 CaO C r 2 0 3 Fe 2 0 3 MCI 40.86 8.44 13.66 2.57 9.60 24.86 MC2 39.40 11.29- 13.15 36.15 MC2 is of the same type as MCI and of similar mineralogical composition i.e. complex spinel (Mg Fe) (Cr Al Fe)20.4 and periclase (MgO) but the grain boundary does not indicate the presence of silicate-containing phases
Get PriceAnalysis and Prediction of Corrosion of Refractory
Oct 23 2020 · The corrosion mechanism of Na 2 CO 3 Na 2 SO 4 and NaCl on refractory materials at different temperatures (600 °C–1200 °C with a temperature step of 100 °C) was investigated. The refractory materials components of MgO·Cr 2 O 3 MgO·Al 2 O 3 Al 2 O 3 MgO and Cr 2 O 3 and 3-sodium salts of 1mol were input in the table of the FactSage TM
Get PriceIn-Situ Synthesis of Mullite Fibers Reinforced Zircon
May 06 2015 · 2.3. Chemical and Mineralogical Composition of Raw Clay Samples The compounds present in the samples were determined by x-ray fluorescence (XRF). The results obtained are presented in Table 3. The mineralogical phases present in the samples were also determined using x-ray diffractometry (XRD). The phases present are reported in Figure 1 and
Get Price(PDF) Tialite type solid solutions formation in the MgO
Mineralogical composition determined by X-ray diffraction patterns showed that a ternary solid solution (Fe Al)2TiO5 was formed in all cases at temperature of 1250°C. For the samples with a content of 10-20 wt of magnesium and iron oxide magnesium spinel and pseudobrookite were identified that solubilised in tialite and a (Mg Fe Al)2TiO5
Get PricePhase Equilibria in the System MgO‐Cr2O3‐SiO2KEITH
Studies of phase equilibria by the method of quenching show that there are no ternary compounds at liquidus temperatures in the system MgO‐Cr 2 O 3 ‐SiO 2.There is an extensive two‐liquid region and the stability fields of periclase picrochromite and chromic oxide extend across most of the diagram.
Get PriceEPD Congress 1996The Minerals Metals Materials Society
The diagram illustrates the compositions of various refractories in the MgO-Cr 2 O 3-Fe 2 O 3-Al 2 O 3 system tested in contact with fayalite slag to determine how refractory composition affected the wetting angle and interfacial reaction with the fayalite slag. MgO showed low wettability and good chemical resistance to the slag the formation
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tions between refractory materials and molten metal and slag. Our study was based on the principles of the metasoma- tic zonality theory developed by D. S. Korzhinskii l for natural processes and on our own studies of reactions between periclase-chromite refractories and nickel converter matte 2 and between mineral rocks and magmatic melts
Get PriceDepth-dependent peridotite-melt interaction and the origin
Feb 17 2021 · For basalt-peridotite reaction the model results (Fig. 5) indicate that reaction between basalt and peridotite leads to a decrease in the MgO content of the residue resulting in lower Mg# at all
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Effect of Particle Composition of Magnesite on Fracture Properties of MgO-C Brick 572 Wang Runze and Liu Yanling Luoyang Institute of Refractories Research China Reaction Kinetics in the MgO-C Refractory Materials at High Temperature 580 Under Vacuum Jiang Mingxue Xi an Institute of Metallurgy and Construction Engineering China
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composition regardless of the slag type and the steel composition. These studies can develop depending on the slag composition of steel and steel mills specific conditions 5 . Local corrosion was studied on alumina-graphite refractory interface and slag by immersion tests and direct observation technique using high temperature X-ray.
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Field surveys were conducted in which six samples of clay were collected and characterized. The results of the mineralogical analysis carried out by X-ray diffractometry on total powder and on the clay powder reveal the presence of kaolinite illite and chlorite clay minerals with the clay color predominantly reddish. The non-clay minerals identified were quartz goethite gibbsite feldspar
Get PriceAddition of ceramics materials to improve the corrosion
Jun 25 2019 · This review shows that adding ceramic materials such as ZrO2 ZrSiO4 TiO2 SiO2 Cr2O3 etc. to abase alumina refractory clay improves the corrosion resistance under the presence of acid (H2SO4 HCl HNO3 etc) and/or alkaline (NaOH KOH Na2O Ca(OH)2 etc) solutions. Characterization techniques such as SEM XRD ICP-MS analysis and weight loss show individual or
Get PriceDepth-dependent peridotite-melt interaction and the origin
Feb 17 2021 · For basalt-peridotite reaction the model results (Fig. 5) indicate that reaction between basalt and peridotite leads to a decrease in the MgO content of the residue resulting in lower Mg# at all
Get PriceA Brief Review of Metallothermic Reduction Reactions for
In order to investigate the phenomenon of heat resisting alloys that contain elements which enter easily into reaction with the oxides of the refractory crucible and to establish the crucible composition that has least effect on the alloys tests were undertaken with crucibles containing ZrO/sub 2/ BeO MgO Al/sub 2/O/sub 3/ and (Al/sub 2/O
Get PriceMineralogical Magazine Volume 62Issue 3 Cambridge Core
Cambridge CoreMineralogical MagazineVolume 62Issue 3. We use cookies to distinguish you from other users and to provide you with a better experience on our websites.
Get Price2 carbonation and performance of MgO cements C. Unluera
1 1 The role of brucite ground granulated blastfurnace slag and magnesium silicates in the 2 carbonation and performance of MgO cements 3 4 5 C. Unluera. .1 A. Al-Tabbaaa 6 7 8 a Department of Engineering University of Cambridge Trumpington Street Cambridge CB2 1PZ UK 9 Corresponding author. Tel. 65 E-mail address ucise ntu.edu.sg
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as TS33 and TS20 specifi c examples of Type B1 and Type B2 inclusions respectively. Both are clinopyroxene-rich types of refractory inclusions found in CV3 chondrites the former having more normative melilite due to their lower SiO 2 contents than the latter. The bulk composition of ETEG was chosen to be undersaturated with respect to spinel
Get PriceChemical wearing mechanism of refractory materials in a
Studies of the reactions between the MgO-C refractory and a CaO-Al 2O3-SiO2-MgO slag system have been carried out through thermodynamic simulations laboratory experiments and
Get Price(PDF) Mechanism for Carbon Transfer From Magnesia-Graphite
• There is no carbon pickup from 4 wt. C and 6 wt. C when there is no slag present because the spacing between MgO grains is too small to allow contact between steel and graphite or penetration of steel into refractory. MgO-C refractories below 6 wt. C are ideal for the barrel and bottom of ladles because of their resistance to penetration
Get PriceEffects of Composition and Structure of Mg/Al Oxides on
The effects of chemical composition and pretreatment on Mg–Al hydrotalcites and alumina-supported MgO were evaluated for the gas-phase self-condensation reaction of C 3 –C 5 biomass-derived methyl ketones. We show that the selectivity toward the acyclic dimer enone and the cyclic enone trimer can be tuned by controlling the temperature of hydrotalcite calcination.
Get PriceUnderstanding refractory api 936 reading v by charlie
6.3 Mounting 6.3.1 Mount both the test cones and the Standard Pyrometric Cones on plaques of refractory material that have a composition that will not affect the fusibility of the cones (see Note 4).
Get PriceMaterials Free Full-Text Thermodynamic Study of the
The Gibbs free energy of reaction is often adopted to determine the direction and extent of a reaction at constant temperature and constant pressure. FactSage was used to calculate the Gibbs free energy and the phase equilibrium reaction thermodynamics between the refractory materials and Na 2 CO 3 between 600 and 1200 °C.
Get PriceMgO-C Refractories Effect of Carbon Content
Materials 2018 11 883 2 of 11 1500 C thus it is necessary to study the oxidation behavior of the MgO-C refractory with various carbon contents at higher temperatures. 2C(s) O2(g) = 2CO(g) (1) C(s) MgO(s) = CO(g) Mg(g) (2) The wettability characteristics between molten slag and refractories are an important indicator for
Get Price(PDF) Mechanism for Carbon Transfer From Magnesia-Graphite
• There is no carbon pickup from 4 wt. C and 6 wt. C when there is no slag present because the spacing between MgO grains is too small to allow contact between steel and graphite or penetration of steel into refractory. MgO-C refractories below 6 wt. C are ideal for the barrel and bottom of ladles because of their resistance to penetration
Get PriceEPD Congress 1996The Minerals Metals Materials Society
The diagram illustrates the compositions of various refractories in the MgO-Cr 2 O 3-Fe 2 O 3-Al 2 O 3 system tested in contact with fayalite slag to determine how refractory composition affected the wetting angle and interfacial reaction with the fayalite slag. MgO showed low wettability and good chemical resistance to the slag the formation
Get PricePhase Equilibria in the System MgO‐Cr2O3‐SiO2KEITH
Studies of phase equilibria by the method of quenching show that there are no ternary compounds at liquidus temperatures in the system MgO‐Cr 2 O 3 ‐SiO 2.There is an extensive two‐liquid region and the stability fields of periclase picrochromite and chromic oxide extend across most of the diagram.
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Mechanism of carbon transfert from MgO-C refractory to IF steel. ULC steel. Carbon pick up (ppm) in steel ( after killed with Al) Carbon pick up strongly varies with the composition of the slag and the importance of argon stirring Steel ladle. 16 14. Slag line. 12 10 8 6 4 2 0 0 Fe ( ) in slag. Relationship between carbon pick up and iron
Get PriceEffects of Composition and Structure of Mg/Al Oxides on
The effects of chemical composition and pretreatment on Mg–Al hydrotalcites and alumina-supported MgO were evaluated for the gas-phase self-condensation reaction of C 3 –C 5 biomass-derived methyl ketones. We show that the selectivity toward the acyclic dimer enone and the cyclic enone trimer can be tuned by controlling the temperature of hydrotalcite calcination.
Get PriceUSA1Castable refractory compositionGoogle
A castable refractory composition may include from 5 to 95 by weight of alumina aluminosilicate or mixtures thereof up to 70 by weight silicon carbide up to 10 by weight carbon from 0.1 to 5 by weight alkaline earth metal oxide and/or hydroxide and from 0.1 to 5 bv weight of silica having a surface area of at least about 10 m 2 /g.
Get PriceDepth-dependent peridotite-melt interaction and the origin
Feb 17 2021 · For basalt-peridotite reaction the model results (Fig. 5) indicate that reaction between basalt and peridotite leads to a decrease in the MgO content of the residue resulting in lower Mg# at all
Get PricePhase Equilibria in the System MgO‐Cr2O3‐SiO2KEITH
Studies of phase equilibria by the method of quenching show that there are no ternary compounds at liquidus temperatures in the system MgO‐Cr 2 O 3 ‐SiO 2.There is an extensive two‐liquid region and the stability fields of periclase picrochromite and chromic oxide extend across most of the diagram.
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