Watering port

Abstract

The invention discloses a watering port belonging to the field of continuous steel casting. The watering port comprises a refractory material body, a pouring path, a housing and an argon blowing port, wherein the pouring path is arranged in the center of the body, the housing surrounds the body and the top, and the argon blowing port is arranged on the housing; an air path communicated with the argon blowing port is arranged between the housing and the body; and the refractory material body is divided into three layers which are respectively a venting layer, an airtight layer and a venting layer.

Description

technical field

[0001] The invention relates to a refractory material for continuous casting, in particular to an upper nozzle. Background technique

[0002] At present, there are generally two types of upper nozzles for continuous casting in the market. One is strip-shaped air-permeable, that is, the lower part of the upper nozzle refractory body is made of air-permeable materials, and the upper part is made of air-impermeable materials. During the casting process, impurities often deposit on the upper part of the body. Phenomenon on the inner wall, resulting in clogging and adverse effects on the production process. The other is fully breathable, that is, the body of the upper nozzle refractory is all breathable materials. Although this type of product has good air permeability, it cannot stabilize the back pressure after continuous pouring in multiple furnaces, resulting in an increase in the amount of argon blowing in the later stage of pouring. adverse effect on qualit...

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