Method for repairing converter through waste magnesia carbon bricks
A technology for discarding magnesia-carbon bricks and converters, which is applied in the field of metallurgy, can solve the problems of shortening the life of the furnace body, reducing the strength of the repair layer, and high water content in the repair material, so as to improve the operation rate of the converter, increase the corrosion resistance, and shorten the repairing furnace. effect of time
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Embodiment 1
[0027] Embodiment 1 Utilizes the method for repairing the front large surface of the converter of discarded magnesia-carbon bricks
[0028] The repair method specifically includes: tapping steel from the converter to be repaired, ensuring that the final temperature of tapping is 1630°C, the main components of the final slag are 7.55% magnesium oxide, 2.67% phosphorus pentoxide, 23.87% iron oxide, 36.93% calcium oxide, 15.54% silicon dioxide, 3.12% manganese oxide, and the balance is impurities.
[0029] The basicity of the terminal slag is 2.38, and the terminal oxygen level is 500ppm. The terminal slag after tapping is directly dumped without slag splashing, the slag dumping angle is kept at -115°, and the amount of slag remaining is controlled to be 1 / 2 of the pre-calculated brick filling amount. Add 1.2 tons of brick supplementary material to the converter to be repaired to form a molten material with the terminal slag. 90% of the added brick supplements are between 30 an...
Embodiment 2
[0031] Embodiment 2 Utilizes the repairing method of the front bottom connection of the converter of waste magnesia carbon brick
[0032] The repair method specifically includes: tapping the converter to be repaired, ensuring that the final temperature of the tapping is 1650°C, and the main components of the terminal slag are 8.46% magnesium oxide, 1.94% phosphorus pentoxide, 21.69% iron oxide, 35.41% CaO, 16.15 %SiO 2 , 2.87% MnO, the balance is impurities.
[0033]The basicity of the terminal slag is 2.19, and the terminal oxygen position is 700ppm. Dump the terminal slag after tapping directly without splashing the slag, keep the slag dumping angle at -115°, and control the 2 / 3 of the pre-calculated brick filling amount of the remaining slag. Add 1.7 tons of brick supplementary material to the converter to be repaired, and mix with the terminal slag left in the furnace to be repaired to form a molten material. 95% of the added brick supplements are between 30 and 200mm i...
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