Deep desulfurization method using premelted slag in RH vacuum furnace
A technology of deep desulfurization and pre-melting slag, applied in the field of deep desulfurization of pre-melting slag in RH vacuum furnace, to achieve the effect of obvious desulfurization effect, high desulfurization rate and reducing environmental pollution
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[0020] For the RH furnace without top gun powder spraying device, when producing low-sulfur molten steel, the process flow of converter→LF furnace→RH furnace→casting machine can be used, and at the same time, 300~800Kg / is added through the feeding chute during the RH treatment. The pre-melted slag of t is subjected to normal molten steel vacuum treatment at the same time to realize the deep desulfurization effect of molten steel.
[0021] Test data of RH pre-melting slag desulfurization in Shouqin Company:
[0022] date Heat Steel type The amount of pre-melted slag added RH into the station S,% S after RH off,% Desulfurization rate 08.6.14 8P04178 X70 300Kg 0.0025 0.0018 28.0% 08.6.16 8Q04619 X70 300Kg 0.0023 0.0019 17.4% 08.6.16 8N03952 X70 300Kg 0.0034 0.0028 17.6% 08.6.18 8P04289 X70 600Kg 0.0043 0.0039 9.3% 08.6.18 8P04273 Q345225 600Kg 0.0052 0.0043 17.3% 08.6.19 8Q4671 X70 500Kg 0.0051 0.0035 31....
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