2004
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January
Mixing Step and Permeability of Polymeric-Fiber-Containing
Refractory Castables
R. Salomão, V.G. Domiciano, C.S. Isaac, R.G.
Pileggi and V.C. Pandolfelli
Dept. of Materials Engineering, Federal University of São Carlos, São Carlos,
Brazil
Several combinations of fiber lengths
and addition methods were tested; the addition of shorter fibers
resulted in easier mixing and higher increase in permeability,
without requiring an additional process step. View Article
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March
Beach-Sand-Sillimanite-Based Zirconia–Mullite
Composites
Manas Kamal Haldar and S.K. Das
Refractories Div.
A.C. Das
General Furnace Div.
Central Glass & Ceramic Research Institute, Calcutta, India
Zirconia–mullite composites can be prepared from Indian coastal beach-sand sillimanite,
zirconia and alumina, with yttria as an additive. The microstructure of the zirconia–mullite
composites is characterized by equiaxed mullite grains and zirconia grains. View Article
Composition Design of Al2O3–MgO System Castables
Yang De’an, Zhao Wei, Liang Chong and Shen Jiyao
School of Materials Science & Engineering, Tianjin University, Tianjin, People’s
Republic of China
Three types of Al2O3–MgO castables are described
and their applications discussed. View Article
Strength of Gelcast Ceramic Foams
F.S. Ortega
Institute of Research & Development, Univap, São José dos Campos, Brazil
J.A. Rodrigues and V.C. Pandolfelli
Materials Engineering Dept., Federal University of São Carlos, São Carlos, Brazil
Bending and uniaxial compressive strengths of alumina ceramic foams produced
using suspensions that contained various concentrations of surfactant were evaluated
and compared with their relative densities. View Article
UNITECR 2003 Puts Focus on the Environment
Robert W. Crolius
The Refractories Institute, Pittsburgh, Pa.
The eighth biennial meeting of UNITECR, held at Osaka, Japan, provided the opportunity
for scientists from around the world to share the latest knowledge about refractories. View Article
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April
Dispersion and Setting of Al2O3–SiC–SiO2–C
ULC Refractory Castables
I.R. de Oliveira, A.R. Studart and V.C.
Pandolfelli
Dept. of Materials Engineering, Federal University of São Carlos, São Carlos,
SP, Brazil
B.A. Menegazzo
Alcoa Alumínio/Brazil
The empirical nature of many previous studies
has motivated a systematic evaluation of dispersants in high-alumina
refractory compositions. View Article
Cartridge
Dust Collector Keeps Refractory Plant Clean
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May
Improved Silica Crown Refractory for
Oxy–Fuel-Fired Glassmelter
R. Alonso Gonzalez
Grupo Pavisa, Naucalpan, Mexico
John T. Brown
GMIC, Corning, N.Y.
Roger P. Weilacher
Glass Design Inc., Sapulpa, Okla.
Michael A. Nelson
Consultant, Jeffersonville, Ind.
Important information is provided that is necessary when considering silica-brick
for long melter crown life in oxy–gas melters View Article
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June
Refractories for Gasifiers
Zongqi Guo
Technology Center, RHI Refractories, Leoben, Austria
High-chromia, alumina–chromia and corundum refractory
brick are fabricated using high-pressure shaping and high-temperature
sintering to meet the growing demands of gasification technologies
in chemical and petrochemical industries. View Article
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July
Dewatering Refractory
Castables
Murilo D.M. Innocentini, Fábio A. Cardoso,
Antonio E.M. Paiva and Victor C. Pandolfelli
Dept. of Materials Engineering, Federal University of São Carlos, São Carlos,
São Paulo, Brazil
Thermogravimetric tests were used to compare the performance of ultra-low-cement
high-alumina castables under several heating routines and air humidity conditions
during dewatering for the purpose of decreasing the risk of explosive spalling. View Article
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August
Almatis—Building
on a Tradition of Solutions
Patricia A. Janeway
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September
Effect of Dispersants, Fine Powders on Aluminum-Containing
Refractory Castables
A.R. Studart
Swiss Federal Institute of Technology (ETH), Zürich, Switzerland
I.R. de Oliveira, M.D.M. Innocentini and V.C. Pandolfelli
Federal University of São Carlos, São Carlos, SP, Brazil
The effect of various dispersants and fine powders on the reaction of aluminum
powder with water in high-alumina refractory castables is addressed. View Article
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October
Fused Spinel-Bonded Magnesia for Metallurgical Purposes
Emad Mohamed M. Ewais
Refractory and Ceramic Materials Lab, Central Metallurgical R&D Institute, Cairo,
Egypt
Magnesium aluminate spinel-enriched magnesia aggregates were prefabricated by
fusion of mixtures from Egyptian and Turkish magnesite with alumina in a submerged
electric-arc furnace. View Article
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November
Natural Fibers as Drying Additives for Refractory Castables
R. Salomão, C.S. Isaac and V.C.
Pandolfelli
Materials Engineering Dept., Federal University of São Carlos, São
Carlos, S.P., Brazil
The low cost and superior performance of natural fibers as drying additives make
them a promising substitute for synthetic fibers. View Article
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