U N I T E C R ' 9 9 Unified International Technical Conference

on Refractories

P R O C E E D I N G S

6th Biennial Worldwide Congress

in conjunction with the 42nd International Colloquium on Refractories

Refractories 2000

BERLIN - Germany 6 - 9 September 1999

Conten ts

Preface XIII

Our Mandate is Innovation XV Edelgard Bulmahn

Berlin Before the Turn of the Millennium -Linking Yesterday, Today and Tomorrow XVII Dieter Ernst

Chances and Challenges - Economic and Technical Trends in the Steel Industry XXI

Dr. Ruprecht Vondran

Refractories at the Turn of the Millennium XXV Dipl.-Ing. Jakob Aurel Mosser, Dr. Günter Karhut

Unshaped Refractories I 1

Modern Solution of Refractory Problems with Unshaped Refractories 1 Rudolf Krebs

High Performance Rapid Installation Monolithics 6 Isabelle Masson, P. Atkinson, F. Etienne

Modelling and Design of an Anchored Refractory Lining 10 Alain Gasser, C. Andrieux, P. Boisse, Y. Dutheillet, V. Gabis, J. Rousseau

Experience with Alumina-MgO (Spinel Forming) Precast Shapes in Steel-Plant Applications 13 Francis W. Henry, J. W. Stendera

Unshaped Refractories fl 19

An Approach to Formulate Spinel Forming Castables 19 Christopher D. Parr, Thomas A. Bier, Michel Vialle, Catherine Revais

Influence of Microsilica Addition on the Properties of Alumina-Spinel Castables 22 Yung-Chao Ko

Microstructural Studies on Binding Systems of Self-Flowing Refractory Castables 26 Florin Esanu, T. Troczynski, G. Oprea

Effect of Pozzolanic Metakaolin on the Rheology and Properties of Advanced Refractory Castables 33 Tomas Richter, Thomas Vezza

Coke and Iron I 37

Alkali Attack on Materials for the Hearth of a Blast Furnace 37 Marcel C. Franken, J. Trouw

Blast Furnace Hearth Damage and Study on Resistance of Carbon Bricks to Molten Iron Permeation 42 Dayan Peng, Yankui Bian, Qiuying Su, Hongjie Wen, Xueging Yu

First Industrial Results of Monolithic Stave-Cooler Linings in Blast Furnace Russell L. Avis, Marc Gondolf, Daniel Lao, Jean-Louis Eymond

45

Refractory Selection for Blast Furnace Tap Hole at CSN (Brazil) 48 Joao B. Baldo, S. M. Justus, S. Nascimento, E. Longo, J. A. Varella, R. Magnani, C. A. Paskocimas, L. E. Solodale, O. R. Margues

Coke and iron II 49

Hybrid Tap-Hole Mix Material 49 Jürgen Schütz, Thomas Dünnes, K. Shiraishi, F. Inoue, N. Honda

Application of High Density Tap Hole Mix to Blast Furnaces 52 Masakazu lida, Fumihiko Samukawa, Kazuhiro Ogura, Yasunoßu Toritani,Noßuaki Muroi, Seijirou Tanaka

Development of a New Binding System for Low Liquid, Environmental^ Friendly Taphole Clay 55 Max Tondeur, Marc Gondolf, Jean-Pierre Radal

Development of High Durability Tap-Hole Mix for Blast Furnace 59 Masatsugu Kitamura, R. Nakamura, T. Kaneshige, H. Sumimura, T. Kageyama

Protection I 62

Present Status of Refractories Technology and Industry in Ex-USSR 62 Nicolai llyoukha, Valentina Timofeeva

The State of Arts Refractories in Iran 67 Mohammad R. Nilforoushan, F. Saiedi

Mixing, Granulating, Drying and Cooling under Vacuum of Solvent Containing Press Bodies in One Single Process 68 Marcus Müller

Development of Pore Surface Areas in Synthetic Resin-Bonded Periclase Bricks 72 Josef Suren

Protection II 73

Production of Magnesite-Chromite Brick by Regaining the Process Waste in the Basic Refractory Industry 73 Yasemen Kalpakli, Selahattin Gökmen, Serdar Özgen

Planning and Production of Moulds in Tungsten Carbides/MC and or Steel for the Pressing of Refractory Bricks 76

Roberto Bisio

Firing Technology for Refractory Products for the Next Century 78 Jürgen H. Mendheim

Benchmarking a Refractory Industry Quality System 79

ValmyA. G. Oliveira

Unshaped Refractories II! 81

LC and ULC Refractory Castables: Reactions within the Fine Component Matrix 81

Ana M. Segadaes, Daniel A. Fumo

The Influence of Aluminas on the Behaviour of CA/CA2 Cement During Hydration and Thermal Treatment 86 Steffen Möhmel, Wolfgang Gessner, D. Müller, Thomas Bier

Use of Microsilica in a Lightweight Self-Flowing Refractory Castable Heidi Feldborg, B. Myhre

90

Permeability of High-Alumina Self-Flow Refractory Castables 93 Victor C. Pandolfelli, M. D. M. Innocentini, A. R. F. Pardo

Unshaped Refractories IV V

Properties of MgO Castables and Effect of Reaction in Microsilica-MgO Bond System 97

Nan Li, Yaowu Wei, Hongpeng Wu, B. Myhre, C. Odegard

Development of Accerelators for Refractory Gunning Mix Yasuhiro Eguchi, Nobuyuki Takahashi, Makoto Ishikawa, Kofi Watanabe

102

Effect of Chemical Admixtures on the Room Temperature Air Permeability of a Vibratable High Alumina Castable 105 Jose M. Soto, J. D. Smith, Robert E. Moore, Thomas J. Kirchoff

Modelling of the Thermal Behaviour of Refractory Castables During Dewatering Mariano Velez, A. Erkal, T. P. Sander, J. D. Smith, R. E. Moore

106

Thermomechanical Computations of Refractory Structure. Improvement due to the Modelling of the Dehydration Process in High Alumina Castable 107 J. F. Hernandez, Nicolas Schmitt, P. Meunier, Jaques Poirier

Study of the Thermomechanical Properties of Fibre Reinforced Refractory Concrete in Plastic Range Jaroslav Kutzendörfer, V. Nevyhosteny

110