Continuous casting tundish breathable ceramic tube upper nozzle brick cup and argon blowing refining method thereof

A technology of continuous casting tundish and nozzle block, which is used in casting equipment, casting melt containers, manufacturing tools, etc., can solve the problems of small effect and unstable "annular airflow, etc., to promote floating and removal, and inhibit immersion." The effect of the nodule problem of the sprue
CN106041044AActive Publication Date: 2016-10-26SHANDONG IRON & STEEL CO LTD
8 Cites 13 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANDONG IRON & STEEL CO LTD
Publication Date
2016-10-26

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a continuous casting tundish breathable ceramic tube upper nozzle brick cup and an argon blowing refining method thereof. The upper nozzle brick cup comprises an upper nozzle brick cup body, a plurality of ceramic tubes, a gas chamber and a gas inlet pipe, wherein the ceramic tubes are uniformly arranged in a circle; the ceramic tubes and the circular gas chamber are arranged in the upper nozzle brick cup body; a plurality of sockets are uniformly arranged on the gas chamber in a circle; the top ends of the ceramic tubes extend out of the upper surface of the upper nozzle brick cup body by 5 to 10 mm; the lower ends of the ceramic tubes are fixed in the sockets on the gas chamber, and communicate with the gas chamber; the gas inlet pipe is connected to one side part of the gas chamber, and communicates with an external argon gas source by being connected with a metal pipe fitting; an upward circular air curtain barrier is formed after argon gas is blown into the gas inlet pipe, so that gas washing of molten steel entering an upper nozzle is realized; and a certain quantity of argon bubbles enter the upper nozzle along with a steel flow, so that a stable and continuous circular gas flow is formed, which not only solves the problem of nozzle clogging, but also solves the technical problem that protective argon bubbles enter steel to cause sub-surface bubbles of a casting blank.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a continuous casting tundish breathable ceramic pipe upper nozzle seat brick and an argon blowing refining method thereof, belonging to the technical field of iron and steel metallurgy continuous casting tundish metallurgical technology. Background technique

[0002] At present, low-carbon aluminum-killed steel and IF steel are produced by casting slab continuous casting machines. In order to solve the problem of nozzle nodulation, various steel mills generally adopt the method of blowing argon gas into the inner wall of the upper nozzle of the tundish. When the flow rate of argon gas entering the nozzle When the value is increased to a certain value, the gas will form an "annular airflow" in the nozzle, which can significantly reduce the problem of nodulation in the nozzle. However, the disadvantages of this technology are: (1) Due to the continuous adhesion of oxides and other inclusions in the molten steel to the inner surfa...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More