A converter automatic slag splash control method and system
A control method and slag splashing technology, which is applied in the field of converter slag splashing protection, can solve the problems of affecting the production rhythm of steelmaking, increasing the amount of slag splashing nitrogen, unstable furnace maintenance, etc., to shorten the time of slag splashing, reduce erosion, The effect of saving nitrogen consumption
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Embodiment 1
[0037] 1) When the end-point oxygen content in molten steel is greater than 500ppm and less than or equal to 900ppm, the end-point carbon content is greater than 0.02% and less than or equal to 0.06%, and the residual manganese yield is greater than 30% and less than or equal to 40%, the final slag state is poor , which is thin slag.
[0038] 2) Add the slag adjusting agent into the converter through the high-level silo. Specifically, 400-500kg of magnesium carbon balls are preferentially added to the converter to play the role of deoxidation. 1000kg and 800-1000kg of raw dolomite, make the accumulation of the slag more flat, and because the price of raw dolomite is low, it can not only promote the rapid melting of lime, but also improve the alkalinity and viscosity of the slag when used together with lightly burned dolomite. , reduce the erosion of slag on the furnace lining, improve the life of the furnace lining, and reduce the cost of slag conditioning materials.
[0039]...
Embodiment 2
[0043] 1) When the end-point oxygen content in molten steel is greater than 300ppm and less than or equal to 500ppm, the end-point carbon content is greater than 0.06% and less than or equal to 0.1%, and the residual manganese yield is greater than 40% and less than or equal to 45%, the final slag state is good , for the normal slag.
[0044] 2) Add the slag conditioning agent into the converter through the high-level silo. Since the viscosity of the slag is normal, the amount of the slag conditioning material that needs to be added is less than that of the thin slag, so that the purpose of slag conditioning can be achieved. Priority is given to adding 0-300kg of magnesia-carbon balls, and then adding 300-500kg of light-burned dolomite and 300-500kg of raw dolomite at the same time on both sides of the converter junction.
[0045] 3) Since the final slag is normal, the added amount of slag mixing material is less than that of the thin slag. Select the low-high-low-low gun posi...
Embodiment 3
[0049] 1) When the terminal oxygen content in molten steel is less than or equal to 300ppm, the terminal carbon content is more than 0.1%, and the residual manganese yield is more than 45% and less than or equal to 50%, the final slag state is relatively viscous and is a viscous slag.
[0050] 2) Since the slag is sticky, there is no need to add slag-adjusting material.
[0051] 3) Since the final slag is relatively sticky, no slag adjustment material is added, and there is very little slag splashing material in the furnace, and the reaction can be fully reacted without much stirring. Therefore, the high-low-low type gun position is selected, and the descending step is from high to low. Press the slag splashing, specifically, the gun position is pressed down from high to low from 1400mm step by step, after 120 seconds, it is pressed down to 1200mm, and it is pressed down to the end gun position of 1000mm in about 170 seconds. The stirring in the furnace is appropriate, and the ...
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