Molten steel open-flow rod and its open-flow method

Abstract

The invention provides a molten steel start-of-casting drainage rod and a start-of-casting drainage method thereof. The molten steel start-of-casting drainage rod comprises a seal pipe (1), a fire-resistant rod (2), a gravity hammer (3) and an iron chain (4), wherein the top surface of the seal pipe (1) is sealed by a top sealing fin (101) made of iron or stainless steel, and the bottom surface of the seal pipe (1) is sealed by a bottom sealing fin (102) likely to fall off due to heat; the fire-resistant rod (2) is placed in the seal pipe; the gravity hammer (3) is placed in the seal pipe and is positioned below the fire-resistant rod (2); one end of the iron chain (4) is connected with the fire-resistant rod (2), and the other end of the iron chain (4) is connected with the gravity hammer (3); and the bottom, the middle and the top of the interior of the seal pipe (1) are filled with a lubricating layer (5), a thermal insulating layer (6) and a high temperature resistant layer (7) sequentially. During start of casting, the upper end and the lower end of the seal pipe (1) of the molten steel start-of-casting drainage rod melt, and the gravity hammer (3) drops out downwards under the effect of gravity and pulls the fire-resistant rod (2) out of the high temperature resistant layer (7) to enable the contact surface of the high temperature resistant layer (7) and molten steel to have a hole so as to enable molten steel in a steel ladle (9) to flow into a tundish (12) from the hole smoothly, so that start of casting is smoothly carried out.

Description

technical field [0001] The invention relates to steelmaking equipment, in particular to a diverter that can ensure automatic pouring when pouring steel. It is a functionally designed refractory material that is insensitive to heat load time, temperature, and ladle conditions, and has great site adaptability. Strong, overcomes the shortcomings of traditional drainage sand, and the self-opening rate reaches more than 99.5%. Background technique [0002] For many years, steelmaking enterprises have been unable to automatically start pouring steel, resulting in molten steel oxidation or even stop pouring accidents. It is a major problem for steelmaking enterprises. The process increases (that is to say, the heat load time increases), and the pouring rate still cannot meet the highest requirements. [0003] Since the pouring cannot be started automatically, oxygen drainage must be carried out, which not only requires a large number of pipes and oxygen for burning oxygen, which i...

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Problems solved by technology

[0005] The inventor of this application once proposed a "drain device for steelmaking", but the design was still in its infancy at that time, and its internal specific structure, filler composition and use method were not designed, and it could not be called a mature project. patent, for this reason, this application proposes a patent application again, completely solves above-mentioned technical problem

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