A Method for Controlling the Secondary Cooling Water Volume of Billet Continuous Casting under High Casting Speed

Abstract

The invention discloses a continuous casting billet secondary cooling water amount control method under a high-pulling speed condition, and belongs to the technical field of continuous casting. A continuous casting billet secondary cooling region is divided into a strong cold region at the front section and a temperature return region at the rear section, individual control is carried out over thewater amount of a plurality of cold regions in the strong cold region and the temperature return zone, and stepwise declining of the cooling water flow density of the multiple cold regions is implemented. The continuous casting billet secondary cooling water amount control method can improve the blank outlet temperature of a billet continuous casting machine under the high-pulling speed condition, realizes rolling without heating or with less heating and improves energy utilization efficiency; and superstrong cooling is carried out on a front section of a secondary cooling zone, so that rapidgrowth of a casting blank shell is facilitated, and the risk of steel leakage under the high-pulling speed condition is reduced; gradual temperature return is carried out on the rear section of the secondary cooling zone, so that the temperature gradient from the surface of a casting blank to the center position is evenly distributed, and quality control over the rolling mill rolling process is facilitated

Description

technical field [0001] The invention belongs to the technical field of continuous casting, and relates to a method for controlling the amount of secondary cooling water in continuous casting of billets under the condition of high drawing speed. Background technique [0002] As the country vigorously advocates the development of circular economy, metallurgical enterprises have higher and higher requirements for energy conservation and consumption reduction. Continuous casting billet hot charging and continuous casting and rolling technology have obvious characteristics such as low energy consumption, low investment, high yield and short production cycle, so they have become the most active areas of research. Among them, hot feeding and hot charging and continuous casting and rolling are all important prerequisites for high drawing speed. Due to the huge billet continuous casting market, the development of 4-8m / min high-speed billet continuous casting technology provides the ...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for controlling the amount of secondary cooling water in billet continuous casting under high casting speed conditions, which is used to solve the problem that the actual production process of the existing billet continuous casting machine has a large temperature loss of the billet under the high casting speed condition, which is not It is beneficial to hot delivery or continuous casting and rolling; the cooling intensity in the front part of the secondary cooling zone is not enough, which is not conducive to the rapid growth of the slab shell, which increases the risk of breakout under the condition of high casting speed; Problems Contributing to Quality Control of Rolling Mill Rolling Process

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