Carbon-free steel ladle drainage agent for extremely-low carbon steel
A carbon-free ladle, ultra-low carbon steel technology, applied in casting melt containers, manufacturing tools, metal processing equipment, etc., can solve the problems of low automatic glue opening rate, unstable thermal performance, large expansion coefficient, etc. Reasonable collocation, large specific gravity and small expansion coefficient
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Embodiment 1
[0013] Take 60 parts of chromium ore sand , 15 parts of high-purity white quartz sand, 13 parts of high-purity white quartz sand, and 12 parts of fused magnesia sand. Mix and stir high-purity white quartz sand and fused magnesia for 10 minutes, then add chrome sand and stir for 5 minutes, and dry on the tower. . The percentage of active ingredients in the product Cr 2 O 3 : 27.75%, SiO 2 : 29.44%, MgO: 15.64%, Fe 2 O 3 : 16.72%, Al 2 O 3 : 8.47%, the carbon-free drainage agent produced by this scheme is used in a special steel for 2.5 to 3.5 hours, and the self-opening rate is more than 98.5%, which is 10% higher than the self-opening rate of the drainage agent produced by other manufacturers, and It has no pollution to molten steel, and the qualified rate of casting billet reaches 99.8%.
Embodiment 2
[0015] Take chrome ore 68 parts, high-purity white quartz sand 12 parts, high-purity white quartz sand 10 parts, fused magnesia 10 parts, first Mix and stir high-purity white quartz sand and fused magnesia for 10 minutes, then add chrome sand and stir for 5 minutes, and dry on the tower. . The percentage of active ingredients in the product Cr 2 O 3 : 31.28%, SiO 2 : 23.52%, MgO: 14.71%, Fe 2 O 3 : 19.09%, Al 2 O 3 : 9.86%, the carbon-free drainage agent produced by this scheme is used for refining time of 3 to 4 hours in Benxi Steel Plant, and the self-opening rate is 99.7%, reaching more than 1,400 consecutive furnaces. The molten steel is pollution-free.
Embodiment 3
[0017] Take chrome ore 73 parts, high-purity white quartz sand 10 parts, high-purity white quartz sand 7 parts, fused magnesia 10 parts, first Mix and stir high-purity white quartz sand and fused magnesia for 10 minutes, then add chrome sand and stir for 5 minutes, and dry on the tower. . The percentage of active ingredients in the product Cr 2 O 3 : 33.60%, SiO 2 : 18.85%, MgO: 15.18%, Fe 2 O 3 : 20.43%, Al 2 O 3 : 10.81%, the carbon-free draining agent produced by this scheme is used for refining time of 3 to 4 hours in Handan No. 4 steelmaking, the self-opening rate is 100%, and there is no carburization phenomenon in molten steel detection.
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