Device and method for uniformly adding casting powder into continuous casting crystallizer

Abstract

The continuous casting crystallizer casting powder uniform adding device comprises a casting powder main flow guide pipe and a continuous casting crystallizer, an outer ring pipe is arranged on the outer side of the casting powder main flow guide pipe in a surrounding mode, and the inner side of the outer ring pipe evenly communicates with an air inlet pipe towards the casting powder main flow guide pipe; the other ends of the covering slag main flow guide pipe air inlet pipes are all communicated with the covering slag main flow guide pipe, one side of the outer ring pipe is communicated with an air inlet pipe, and the bottom end of the outer ring pipe is evenly communicated with covering slag four-branch pipes. The crystallizer blows argon or nitrogen to better prevent secondary oxidation of the molten steel, blowing is carried out before quartering of the casting powder flow guide pipe, further distribution of the casting powder in the four branch pipes is more balanced, the crystallizer blows argon or nitrogen to better prevent secondary oxidation of the molten steel, and then the quality of a casting blank is further improved.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgical continuous casting, in particular to a device for uniformly adding mold slag to a continuous casting mold and a method thereof. Background technique [0002] The main function of mold slag in the continuous casting process is to insulate heat, prevent oxidation of molten steel, absorb floating inclusions in molten steel, lubricate the surface of casting slab, and control heat transfer. The mold slag in the mold of the continuous casting machine can be divided into three layers, the top layer is newly added mold slag, which is granular; the middle layer is the sintering layer, which is in contact with molten steel during the process of sintering and melting. layer. These three layers all play the role of keeping the molten steel warm and blocking the oxidation of the molten steel; the liquid slag layer has the function of absorbing and dissolving floating inclusions and gases ...

AI Technical Summary

Problems solved by technology

[0003] Since a mold slag conduit of the automatic mold slag adding system adds mold slag to the molten steel surface in the mold, due to the influence of the intrusive nozzle in the middle of the mold, the mold slag is difficult to evenly distribute on the molten steel surface, resulting in uneven thickness of the mold slag on the molten steel surface. Agglomeration and cold steel phenomenon are easy to occur, affecting the quality of casting slabs, and in severe cases, it will cause continuous casting steel breakout accidents

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