A continuous casting secondary cooling nozzle and a using method therefor

Abstract

The invention discloses a continuous casting secondary cooling nozzle and a using method therefor. The nozzle body of the secondary cooling nozzle is a pipe, the secondary cold nozzle is processed into a nozzle inner hole, a throttling block installing hole, an internal screw thread used for fixing, and a nozzle in order starting from the rear end; a throttling block is installed in the throttlingblock installing hole, and the throttling block is a circular column that the center of the circular column is provided with the throttling hole; the nozzle is in an elliptical shape; the front end external surface of the nozzle body is processed into an upper spherical surface of the nozzle head part and a lower spherical surface of the nozzle head part, a front end projecting is formed betweenthe front-most ends of the upper spherical surface of the nozzle head part and the lower spherical surface of the nozzle head part, a projecting in a nozzle direction is formed between the upper spherical surface of the nozzle head part and the lower spherical surface of the nozzle head part along the nozzle direction; two arced nozzle guiding tangent planes are respectively cut on an upper marginside and a lower margin side of the nozzle, and a nozzle guiding tangent plane groove is formed on the outer end of the elliptical nozzle. The service life of a crystallizer copper plate is effectively improved, and the nozzle is prevented from being blocked by slag and the like.

Description

technical field [0001] The invention relates to the nozzle technology of continuous casting machine equipment, in particular to a continuous casting secondary cooling nozzle and a using method thereof. Background technique [0002] The continuous casting secondary cooling nozzle is used in the secondary cooling spray device at a special position of the continuous casting machine. The continuous casting secondary cooling nozzle is installed at the end of the spray pipe fixed together with the casting machine crystallizer (foot roll part) and fan section, which acts between the rolls to provide uniform and reasonable water or water, Air cooling to prevent the slab from bulging after leaving the mold. Therefore, the continuous casting secondary cooling nozzle is to ensure that the slab is cooled and solidified in the casting machine according to a certain temperature requirement, and to ensure that the slab is completely cooled when it exits the casting machine. A device that ...

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to solve the problems in the prior art that the secondary cooling nozzle at the head of the slab continuous casting machine is easily blocked, and the copper plate of the crystallizer is severely corroded. Influenced by molten slag in the final casting process, prevent nozzle clogging or serious changes in the shape of the nozzle, and prevent serious corrosion of the lower end of the copper plate of the crystallizer caused by secondary cooling water flowing back between the crystallizer and the billet shell

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