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| Corrosion of magnesia-chrome brick in molten rich-lead slag direct reduction furnace |
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Received:February 20, 2014
Revised:February 26, 2014
Accepted:February 27, 2014
Published Online:August 10, 2015
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| DOI： |
| KeyWord:Molten rich-lead slag; Magnesia-chrome brick; Erosion; Direct reduction furnace |
| Author | Institution |
| wang yanfei |
Kunming University of Science and Technology |
| fan Gang |
Kunming University of Science and Technology |
| wei chang |
Kunming University of Science and Technology |
| deng zhi gan |
Kunming University of Science and Technology |
| li weifeng |
Henan Yu guang Gold |
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| Abstract: |
| We study the damage of the magnesia-chrome brick in molten rich-lead slag direct reduction furnace at the high temperature, strong reducing atmospheres and basic slag by physical properties testing, chemical composition analysis, SEM examination and Energy-Dispersive Spectrometer (EDS). It was found that the slag oxidation erosion is responsibility for the slag line area brick surface damage, molten slag erosion is the main reason for the molten pool area brick surface damage, and there is no obvious transition zone; and high temperature reducing gas along the firebrick show porosity into the brick inside throat area is the main cause of the brick surface structure becomes loose. Through the analysis of the chemical composition and crystal structure detection, found that the structural damage caused by osmosis of the metal elements such as lead, copper and arsenic is the major factor of the damage to the magnesia-chrome brick at the slag line and the molten. The structures change caused by the reduction reactions of iron oxide is the major factor of loose structure to the magnesia-chrome brick at the top of furnace. |
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