Improved corrosion resistance of Al2O3‐SiC‐C castables
Jan 21 2020 · 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
Chat Online
Corrosion Mechanisms in Refractory Castables by Liquid
Abstract. Corrosion in refractories in a commercial furnace is a very complex phenomenon which involves chemical and physical wear. In this work three refractory castables (A B and C) are being characterized and studied to compare their properties and determine their corrosion mechanisms in the presence of slag obtained from a steel furnace.
Chat Online
Corrosion of high alumina castables by CaO-Al2O3-(SiO2-MgO
The corrosion of materials was evaluated comparing the results of the chemical analyses of slag before and after corrosion tests followed by the macroscopic and microscopic observations of the vertical cuts along the line at the refractory-slag boundary and X-ray phase analyses.
Chat Online
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.
Chat Online
Corrosion of refractories and ceramic materials
Refractory materials Magnesite (>60 MgO) Steel furnaces Magnesia-carbon High wear resistance in steel industry Chrome-magnesite Wall lining in Siemens-Martin steel furnaces Magnesia-alumina Cement furnace linings crucible linings for steel Dl itDolomite (CMCaMg)(CO 3) Sl i t t li iSlag resistant lining Forsterite (2MgO-SiO 2) Furnace lining Chamotte Cheap lining mediumCheap lining medium
Chat Online
Influence of Spinel on the Fracture Energy of Refractory
The specific fracture energy of alumina-spinel refractory castables was studied by the wedge-splitting method in this paper. The influence of synthetic spinel on the specific fracture energy of aluminamagnesia refractory castables was investigated. In-situ formation spinel was replaced by sintering spinel as the synthetic spinel. The experimental results indicated that the specific fracture
Chat Online
Dynamic interaction of refractory and molten steel
Aug 15 2018 · Furthermore to elucidate the corrosion of refractory castables the cleanliness including the total oxygen and oxide inclusions in the steels was analysed. Download Download high-res image (316KB) Download Download full-size image Fig. 4. Phase diagram of Fe-Al-Mg-O with different partial pressure of O 2 (g) at 1600 °C.
Chat Online
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
Chat Online
The effect of microsilica and refractory cement content on
Corrosion of the refractory materials during the casting process for cement and microsilica in the refractory castables and the chemical composition of the base castable are given in . 413 E. A. Firoozjaei et al. / Cerâmica 56 (2010) Tables IV and V respectively.
Chat Online
Properties Processing and Structure of Refractory
Feb 10 2020 · The existence of nano‐alumina could promote more calcium dialuminate (CaO·2Al 2 O 3) and CA 6 (CaO·6Al 2 O 3) formation at lower temperatures.The addition of nano‐alumina is beneficial to form more platelet CA 6 at 1500℃ which improved the hot and cold strength of castables. The platelet CA 6 created excellent bonds between particles in the body by an interlocking morphology.
Chat Online
Ceramics Free Full-Text Corrosion Mechanism of A
Refractory monolithics for steel ladle linings are typically products with low porosities and high bulk densities. They achieve high temperature penetration and corrosion resistance. Despite the high density of these products which is due to the low porosity of the aggregates their matrices still exhibit a high amount of pores. Since calcium magnesium aluminate (CMA) has already proven its
Chat Online
Monolithic Refractory
"Monolithic Refractory" developed in the U.S.A. at the beginning of the 20th century as an innovative alternative to fire brick was first introduced in Japan by AGC Plibrico leading to an epoch-making revolution in the refractory field. As the pioneer of monolithic refractories Plibrico Japan
Chat Online
Corrosion Mechanism of A Density-Reduced Steel Ladle
lining. Furthermore alumina castables with additions of 10–35 MA spinel have proven to be more penetration and corrosion resistant than pure alumina castables 11 . This paper brings two separate earlier studies 12 13 into a broader context and investigates if the
Chat Online
Study of Reactive Impregnation and Phase Transformations
Corrosion of refractories results from reactive transport namely transport of agents and chemical reactions of these agents with impregnated medium. On one hand the transport involves either diffusion or impregnation depending on the state of the corrosive agents and the microstructure of the host media. On the other hand chemical reactions may be very numerous and complex.
Chat Online
Ceramics Free Full-Text Corrosion Mechanism of A
Refractory monolithics for steel ladle linings are typically products with low porosities and high bulk densities. They achieve high temperature penetration and corrosion resistance. Despite the high density of these products which is due to the low porosity of the aggregates their matrices still exhibit a high amount of pores. Since calcium magnesium aluminate (CMA) has already proven its
Chat Online
Corrosion mechanism and kinetic behaviour of MgO–C
Oct 17 2005 · The corrosion rate was calculated from the change in diameter of the cylindrical refractory specimens. The specimens were rotated for 15–120 min at a speed of 100–400 rpm in the molten slag. The rate of corrosion was found to increase with an increase in temperature and rod rotation speed and to decrease when the slag was nearly saturated
Chat OnlineImprovement 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
Chat Online
Corrosion of high alumina spinel castables by steel ladle
Jul 18 2013 · (2006). Corrosion of high alumina spinel castables by steel ladle slag. Ironmaking Steelmaking Vol. 33 No. 2 pp. .
Chat Online
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
Chat Online
CORROSION 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).
Chat Online
Effect of particle size distribution and calcium aluminate
tant properties of the sintered refractory lining namely mechanical strength and corrosion resistance. Nevertheless and although used in rather small amount (typically between 3 and 8 in conventional refractory castables) water is a key ingredient in refractory castables. Thus research efforts have been directed at reducing the kneading
Chat Online
CA6 impact on the corrosion behavior of cement-bonded
Apr 01 2015 · 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.
Chat OnlinePermeability of Refractory Castables at High Temperatures
Request PDF Permeability of Refractory Castables at High Temperatures Temperature is an important factor affectng the permeation of fluids in refractory castables. Because of experimental
Chat Online
Properties of Sol-Gel Bonding Castables Scientific
The silica-alumina sol bonding agent prepared by the sol gel route from ethyl silicate and aluminium isopropanol was characterized by X ray diffraction infrared spectroscopy thermogravimetric analysis particle size distribution. It was utilized in the corundum based refractory castables. The properties and characters such as cold crushing strength apparent porosity hot modulus of
Chat Online
Refractory castable engineering Semantic Scholar
Effect of Cr2O3 addition on corrosion mechanism of refractory castables for waste melting furnaces and concurrent formation of hexavalent chromium M. Nath Shengqiang Song Y. Li Xu Yibiao Materials Science
Chat OnlineCorrosion resistance of alumina-magnesia castable to slag
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
Chat Online
Productsjg-refractories
JuSyS ® ACL. Refractory system for plant areas in the cement industry subjected to intense corrosion. ACL stands for "Anti Corrosion Lining" and protects the lining by way of the "rear ventilation" with fresh air with slight excess pressure. This creates an almost "clean atmosphere" in the lining.
Chat Online
Study on the effect of different sols on high alumina
1.6 Constituents of refractory castables 10 1.7 Bonding systems in refractory castables 12 1.8 Colloidal binders silica Sol 12 1.9 New bonding systems 13 1.10 Application areas 13 C hapter 2 L iterature r eview 18 2.1 Refractory materials 19 2.2 Types of refractories 20
Chat Online
Corrosion Mechanism of A Density-Reduced Steel Ladle
lining. Furthermore alumina castables with additions of 10–35 MA spinel have proven to be more penetration and corrosion resistant than pure alumina castables 11 . This paper brings two separate earlier studies 12 13 into a broader context and investigates if the
Chat Online
Refractories HandbookGoogle Books
Aug 11 2004 · Refractories Handbook. Charles Schacht. CRC Press Aug 11 2004Science520 pages. 4 Reviews. This comprehensive reference details the technical chemical and mechanical aspects of high-temperature refractory composite materials for step-by-step guidance on the selection of the most appropriate system for specific manufacturing processes.
Chat Online
