Corrosion Behavior of BF Slag to SiAlON Bonded Corundum Refractories

2007 ◽  
Vol 280-283 ◽  
pp. 1687-1688
Author(s):  
Zhao Hui Huang ◽  
Wei Pan ◽  
Jing Xia Wang ◽  
Yan Ruo Hong
Keyword(s):  
Corrosion Behavior ◽  
Test Method ◽  
Reaction Products ◽  
Slag Resistance ◽  
Erosion Mechanism ◽  
Bf Slag ◽  
Slag Erosion ◽  
Slag Corrosion

The corrosion behavior of BF slag to sialon bonded corundum refractories using reaction nitriding technology at 1500°C was investigated by crucible test method. The results show that the reaction products of slag corrosion are anorthite, magnalium-spinel and glass phases. The corundum grains can react with MgO in the slag to produce magnalium-spinel, accompanying by expansion and liquating stepwise by slag. Erosion mechanism is oxidation-erosion-dissolving. This study is very necessary and useful to improve the property of BF slag resistance and to yield better overall properties of sialon bonded corundum refractories.

scholarly journals Hot Corrosion Behavior of BaLa2Ti3O10 Thermal Barrier Ceramics in V2O5 and Na2SO4 + V2O5 Molten Salts

Coatings ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 351 ◽  
Author(s):  
Hui Liu ◽  
Jin Cai ◽  
Jihong Zhu
Keyword(s):  
Corrosion Behavior ◽  
Hot Corrosion ◽  
Molten Salts ◽  
Main Reaction ◽  
Thermal Barrier ◽  
Dense Layer ◽  
Reaction Products ◽  
Corrosion Medium ◽  
Barrier Coating ◽  
Salt Corrosion

BaLa2Ti3O10 ceramics for thermal barrier coating (TBC) applications were fabricated, and exposed to V2O5 and Na2SO4 + V2O5 molten salts at 900 °C to investigate the hot corrosion behavior. After 4 h corrosion tests, the main reaction products resulting from V2O5 salt corrosion were LaVO4, TiO2, and Ba3V4O13, whereas those due to Na2SO4 + V2O5 corrosion consisted of LaVO4, TiO2, BaSO4 and some Ba3V4O13. The structures of reaction layers on the surfaces depended on the corrosion medium. In V2O5 salt, the layer was dense and had a thickness of 8–10 μm. While in Na2SO4 + V2O5 salt, it had a ~15 μm porous structure and a dense, thin band at the bottom. Beneath the dense layer or the band, no obvious molten salt was found. The mechanisms by which the reaction layer forms were discussed.

Preparation and blast furnace slag corrosion behavior of SiC–Sialon–ZrN free-fired refractories

2014 ◽  
Vol 40 (7) ◽  
pp. 9763-9773 ◽  
Author(s):  
Juntong Huang ◽  
Zhaohui Huang ◽  
Yan׳gai Liu ◽  
Minghao Fang ◽  
Haitao Liu ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Corrosion Behavior ◽  
Blast Furnace Slag ◽  
Furnace Slag ◽  
Slag Corrosion

scholarly journals Modeling and experiment of slag corrosion on the lightweight alumina refractory with static magnetic field facing green metallurgy

2018 ◽  
Vol 54 (2) ◽  
pp. 143-151 ◽  
Author(s):  
A. Huang ◽  
P. Lian ◽  
L. Fu ◽  
H. Gu ◽  
Y. Zou
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Field ◽  
Corrosion Resistance ◽  
Corrosion Behavior ◽  
Static Magnetic Field ◽  
Steel Production ◽  
High Quality ◽  
Slag Corrosion Resistance ◽  
Alumina Refractory ◽  
Slag Corrosion

Electromagnetic field is applied widely in metallurgy and other high temperature processes, and affects the behavior of melts. The lightweight alumina based carbon free refractory is of importance for energy-saving, consumption reduction and high quality steel production, and the slag corrosion resistance is significant concerning its service life. Does electromagnetic field control the slag corrosion behavior on the lightweight alumina refractory? In this paper, a multi-field coupled model was established to describe the slag corrosion process in an electromagnetic field. The mathematical modeling in combination of experiments was applied to clarify slag corrosion behavior of lightweight alumina refractory in static magnetic field. The simulation results agree with that of the experiments, which means the proposed model is promising for slag corrosion modeling. The results show that the combination of the slag properties change, and electromagnetic damping caused by MHD (magnetohydrodynamics) effect can enhance the slag corrosion resistance by inhibiting slag penetration and promoting formation of a directional isolation layer, and be beneficial to high-quality clean steel production.

Corrosion Behavior of BF Slag to SiAlON Bonded Corundum Refractories

2007 ◽  
pp. 1687-1688
Author(s):  
Zhao Hui Huang ◽  
Wei Pan ◽  
Jing Xia Wang ◽  
Yan Ruo Hong
Keyword(s):  
Corrosion Behavior ◽  
Bf Slag

Influences of Commercial SiC and Al2O3-SiC Synthesized from Clay on the Slag Resistance of Corundum Material

2010 ◽  
Vol 146-147 ◽  
pp. 526-529
Author(s):  
Bei Yue Ma ◽  
Qiang Zhu ◽  
Yong Sun ◽  
Jing Kun Yu ◽  
Ying Li
Keyword(s):  
Corrosion Resistance ◽  
Carbothermal Reduction ◽  
Molten Slag ◽  
Raw Materials ◽  
Resistance Mechanisms ◽  
Reduction Reaction ◽  
Slag Resistance ◽  
Slag Corrosion ◽  
Carbothermal Reduction Reaction ◽  
Better Than

The corundum based material was prepared, with fused white corundum, commercial SiC powder and superfine Al2O3-SiC powder synthesized from clay by carbothermal reduction reaction as raw materials. The influences of SiC and Al2O3-SiC powders on the slag penetration and corrosion resistance of the material were investigated, and the slag resistance mechanisms of the additives were also discussed. It was found that the slag resistance of the corundum material by adding Al2O3-SiC and SiC powders could be improved obviously. For improving the slag resistance of the corundum material, adding Al2O3-SiC was much better than adding commercial SiC. When the Al2O3-SiC powder contacted with the molten slag, Al2O3 in the additive could be dissolved into the molten slag immediately, while SiC remained, which caused the viscosity of molten slag to be increased. So, the slag penetration and slag corrosion into the corundum material could be effectively inhibited.

BF slag resistance of β-Si3Al3O3N5 material derived from Al salt cake

2015 ◽  
Vol 35 (4) ◽  
pp. 1307-1315 ◽  
Author(s):  
Peng Li ◽  
Mei Zhang ◽  
Zhenbo Wang ◽  
Seshadri Seetharaman
Keyword(s):  
Slag Resistance ◽  
Salt Cake ◽  
Bf Slag

Effects of Matrix Densification Based on Particle Packing on Lightweight Al2O3-MgO Castables

2017 ◽  
Vol 726 ◽  
pp. 455-459
Author(s):  
Yang Zou ◽  
Hua Zhi Gu ◽  
Ao Huang ◽  
Min Tao Zhang ◽  
Mei Jie Zhang
Keyword(s):  
Penetration Resistance ◽  
Particle Packing ◽  
Q Value ◽  
Slag Resistance ◽  
Linear Change ◽  
High Q ◽  
Refractory Castables ◽  
The Matrix ◽  
Sintering Characteristics ◽  
Slag Corrosion

The property of refractory matrix was dominated by both the maineral composition and particle packing behaviors. In this study, the theoretical packing density of refractory castables was calculated to design the particle size distribution (PSD) of its matrix. Four lightweight Al2O3-MgO castables with different matrix PSD (represented by q-value) were prepared and examined. Results show that a suitable q-value was needed to ensure acceptable properties including sintering characteristics, strength and slag resistance, which deteriorated distinctly at high q ( > 0.31). For the sample with q = 0.28, the matrix showed dense and uniform mirostructure, and the properties of castable reached a favorable compromise among sintering characteristics (apparent porosity = 14.8%, bulk density = 3.02g∙cm-3, permanent linear change < 0.6%), strength (cold modulus of rapture = 12.4MPa, cold crashing strength=155.5MPa), and resistance against both slag corrosion (Ic = 22.4%) and penetration (Ip = 11.5%). The sample with q = 0.25 showed the highest strength and resistance against slag corrosion, but its slag penetration resistance was lower due to the existence of cracks between aggregates and matrix.

Effect of Urban Domestic Wastes on Refractory for Cement Rotary Kiln

2014 ◽  
Vol 1051 ◽  
pp. 260-264
Author(s):  
Jun Tao Wang ◽  
Song Lin Chen ◽  
Xiao Yu Dong ◽  
Chen Liu ◽  
Ru Lin Xu ◽  
...  
Keyword(s):  
Thermal Stress ◽  
High Temperature ◽  
Rotary Kiln ◽  
High Alumina ◽  
Refractory Materials ◽  
Will Emit ◽  
Erosion Mechanism ◽  
Slag Erosion

The experiment proved the effect of burning urban domestic wastes on alkali-resistant bricks and spalling-resistant high alumina bricks by the Static crucible method. The result indicates that the main erosion mechanism is slag permeable and slag erosion. Burning the waste will emit high temperature gases containing alkali, sulfur and chlorine, and the gases react with refractory materials contribute to the formation of sulfate, chloride and compound salt, which deteriorate and invalid refractory gradually. Through SEM, it is observed that the loose structure of metamorphic layers and easily spalled during thermal stress.

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