Method for reducing flocculating flows of low silicon aluminum killed steel
A low-silicon aluminum-killed steel and flocculation technology, applied in the field of smelting technology, can solve the problems of reducing the fluidity of molten steel, limiting the number of continuous pouring, production capacity and product quality decline, etc., to improve equipment production capacity and product quality, and eliminate intermittent pouring The effect of the accident
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[0021] Example 1: The production steel grade is SAE1006, the molten steel canned steel volume is 100 tons, the 100 tons LF furnace is used, and the intermediate packaging steel volume is 30 tons.
[0022] 1. Use a fully repaired secondary molten steel tank with a temperature of 800°C on the inner wall of the molten steel tank, and treat it until there is no residue on the bottom of the molten steel tank.
[0023] 2. After removing the slag from the molten steel, add 190kg of small lime with a diameter of less than 20mm into the molten steel tank so that the lime covers the molten steel tank completely.
[0024] 3. Before extracting the first sample in the LF furnace, add 140 kg of fluorite, 80 kg of bauxite, and 350 kg of lime, and stir for 3 minutes with an argon flow of 450 Nl / min.
[0025] 4. After extracting the first sample from the LF furnace, add 80kg of passivated aluminum powder for deoxidation.
[0026] 5. The LF furnace is heated for 15 minutes for the first time, and then 20...
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[0035] Example 2:
[0036] The production steel grade is SWRCH18A, the molten steel canned steel volume is 100 tons, the 100 tons LF furnace is used, and the intermediate packaging steel volume is 30 tons.
[0037] 1. Use a fully repaired secondary molten steel tank. The temperature of the inner wall of the molten steel tank used is 830℃, and please treat it until there is no residue on the bottom of the molten steel tank.
[0038] 2. After removing the slag from the molten steel, add 200kg of small lime with a diameter of less than 20mm into the molten steel tank so that the lime completely covers the molten steel tank.
[0039] 3. Before extracting the first sample in the LF furnace, add 160 kg of fluorite, 70 kg of bauxite, and 380 kg of lime, and stir for 3 minutes with 490Nl / min argon flow.
[0040] 4. After extracting the first sample from the LF furnace, add 88kg of passivated aluminum powder for deoxidation.
[0041] 5. The LF furnace is heated for 10 minutes for the first time, ...
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