Ultra-long-life anti-oxidation universal improved tundish drain hole

Abstract

The invention discloses an ultra-long-life anti-oxidation universal improved tundish drain hole. The drain hole comprises a drain hole body, the drain hole body is divided into a sliding plate surface body, a sliding plate surface zirconium oxide core, a body, a body zirconium oxide core and a molten steel channel, the bottom of the body is of an inwards-concave arc-shaped structure, and the vertical height of the arc-shaped structure is 0.1-1 time of the height of the drain hole body. The bottom of the drain hole body is designed to be of the arc-shaped structure and can be matched with an integral type submersed nozzle, a combined type submersed nozzle and a sliding nozzle type submersed nozzle, the phenomenon that the submersed nozzle is not matched with the drain hole is avoided, and potential safety hazards are eliminated; the arc-shaped structure at the bottom of the drain hole body can be inserted into an inner cavity of the submersed nozzle, and the joint of the submersed nozzle and the tundish drain hole cannot fluctuate due to molten steel, so that the joint of the drain hole and the submersed nozzle is inclined, gas cannot enter the molten steel, secondary oxidation of the molten steel is avoided, and the quality of the molten steel is ensured.

Description

technical field [0001] The invention relates to the technical field of continuous casting of refractory materials, in particular to an ultra-long life anti-oxidation general improved tundish nozzle. Background technique [0002] The lower nozzle is an important part in the continuous casting steel production process. It is installed at the bottom of the tundish, and the bottom is connected to the submerged nozzle. The lower nozzle is in contact with the molten steel at a temperature of 1500 degrees Celsius for a long time, and the lower nozzle is subjected to high temperature molten steel. Static pressure, the top force of the upper nozzle on it from the bottom up, and the disturbance of the high-speed flow of high-temperature, high-specific gravity molten steel, so the quality of the lower nozzle must be guaranteed, and the cleanliness of the continuous casting molten steel mainly refers to the non-metallic in the steel The quantity, size, distribution and shape of inclusio...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the connection between the submerged nozzle and the lower nozzle of the tundish in the prior art. Due to the fluctuation of the molten steel, the joint between the lower nozzle and the submerged nozzle will be skewed, and gas will enter the molten steel, causing the molten steel to appear secondary. Sub-oxidation seriously affects the quality of the billet, and different types of submerged nozzles need to be matched with different types of nozzles. The versatility of the nozzles is poor, and customers need to store different types of nozzles. It is easy to replace the nozzles during assembly. Misuse makes the submerged nozzle and the water outlet not match, and in severe cases, safety accidents will occur. This technical problem provides a super-long life anti-oxidation general improved tundish water outlet, which has a long service life and an arc shape at the bottom. The structural design enables it to be matched with various types of submerged nozzles, and can be inserted into the inner cavity of the submerged nozzle to ensure the sealing of the joint between the submerged nozzle and the submerged nozzle, and reduce the secondary oxidation of molten steel due to oxygen absorption. Improve the quality of molten steel

Images