Improvement of Slag Corrosion Resistance by Adding Carbothermal Reduction Reacted Non-oxides

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.

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Effect of Addition of Non-oxides on the Slag Corrosion Resistance of MgO-Al2O3Refractories

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/18/22/222015 ◽

2011 ◽

Vol 18 (22) ◽

pp. 222015

Author(s):

Keisuke Morita ◽

Shinichi Sakida ◽

Yasuhiko Benino ◽

Tokuro Nanba

Keyword(s):

Corrosion Resistance ◽

Slag Corrosion Resistance ◽

Slag Corrosion

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

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.146-147.526 ◽

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.

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Effect of ZrO2 Additive on the Properties of MgO-Cr2O3 Refractory Used for RH Degasser

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.680.331 ◽

2016 ◽

Vol 680 ◽

pp. 331-334 ◽

Cited By ~ 1

Author(s):

Chao Peng ◽

Wei Bo Yang

Keyword(s):

Corrosion Resistance ◽

Slag System ◽

High Ratio ◽

Slag Viscosity ◽

High Temperature Mechanical Properties ◽

Slag Corrosion Resistance ◽

Mechanical Properties And Corrosion ◽

Resistance Performance ◽

Slag Corrosion ◽

Increase Corrosion Resistance

To improve the properties and RH degasser slag corrosion resistance of magnesia-chrome refractory, the effect of the addition of ZrO2 was investigated. The results showed that the presence ZrO2 additive can densify the magnesia-chrome samples due to promotion of grain boundary activities and ultimately direct bond formation, which improved the high temperature mechanical properties and corrosion resistance. The results also indicated that in the RH degasser slag system with a high ratio of calcia to silica, the slag resistance behavior of magnesia-chrome composite added ZrO2 could be described as follows: the ZrO2 reacts with CaO to form the calcium zirconate compound which is densification lay and simultaneously, could increase corrosion resistance performance by blinding pore and thickening slag viscosity. Therefore, it is expected to be the major reason for the ZrO2 enhanced corrosion resistance behavior observed for magnesia-chrome refractory.

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Corrosion Resistance Mechanism of MgO-ZrO2 Brick in RH Degasser Slag

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.415-417.2048 ◽

2011 ◽

Vol 415-417 ◽

pp. 2048-2052 ◽

Cited By ~ 1

Author(s):

Song Lin Chen ◽

Lin Yuan ◽

Zhong Qi Feng ◽

Xi Jun Liu ◽

Jia Lin Sun

Keyword(s):

Corrosion Resistance ◽

Steel Slag ◽

Slag System ◽

High Ratio ◽

Slag Viscosity ◽

Calcium Zirconate ◽

Electric Steel ◽

High Concentration ◽

Slag Corrosion Resistance ◽

Slag Corrosion

Slag corrosion resistance behavior of MgO-ZrO2 refractory was investigated in this work. The results indicated that in the non-oriented electric steel slag system with a high ratio of calcia to silica, the slag resistance behavior of MgO-ZrO2 composite could be described as follows: the ZrO2 reacts with CaO forming the calcium zirconate compound which is densification encapsulating periclase lay. However, in the oriented electric steel slag system with a high concentration of silica and the low ratio value of calcia to silica, the slag corrosion resistance behavior of MgO-ZrO2 composite is different. The ZrO2 would react with CaO forming the calcium zirconate and simultaneously, one more product C2S as well. C2S has double response of strength and could increase corrosion resistance performance by blinding pore and thickening slag viscosity. Therefore, it is expected to be the major reason for the enhanced corrosion resistance behavior observed for MgO-ZrO2 refractory.

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