Refrigerating device of belt steel and cooling and controlling method thereof

Abstract

The invention belongs to the technical field of metallurgy and in particular relates to a device for cooling strip steel and a cooling control method thereof. The cooling device mainly comprises cooling sections, a strong cooling region Q (Q1, Q2), a rough adjustment cooling region C and an accurate adjustment cooing region J; after manifolds are closed partially, the strong cooling region Q (Q1, Q2) can be used as the rough adjustment cooling region C; each cooling region consists of a plurality of cooling sections; the cooling sections have the same length and consist of laminar flow cooling manifolds on the upper part and spraying manifolds on the lower part; a side spraying device is arranged between the cooling sections so as to remove accumulated water on the surface of the strip steel; and the cooling control method of the device for cooling the strip steel carries out the setting calculation and the feedforward and feedback control through a computer system. The device for cooling the strip steel can flexibly realize the cooling of various modes, has a simple equipment structure, can realize the requirement on cooling control of the multibreed,strip steel, meet the requirements of hot-rolled multiphase steel, ultrafine crystal grain steel and other products and can be widely used for the cooling after rolling of the hot-rolled strip steel.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a strip steel cooling device and a cooling control method thereof. Background technique [0002] The post-rolling cooling device of the finishing mill is one of the key links in the production of hot-rolled strip steel. Its function is to obtain a suitable coiling temperature of the strip steel and control the mechanical properties of the strip steel. The capacity, cooling intensity, cooling rate, coiling temperature and control precision of the cooling device all directly affect the quality and performance of the strip. [0003] In the course of its development, the hot-rolled strip cooling device has several methods such as spray cooling, water spray cooling, spray cooling, laminar flow cooling, and water curtain cooling. Among them, the laminar flow cooling device has a wide range of processing products, With the advantages of wide flow range adjustment, no flu...

AI Technical Summary

Problems solved by technology

The main disadvantage of this ordinary laminar flow cooling device is that it is impossible to realize the controlled cooling of the strip, including the adjustment of the cooling rate of the strip, the diversification of cooling modes, etc.

By improving the structure of the main cooling group, this laminar flow cooling device can realize the controlled cooling of some hot-rolled strip steel varieties, and realize the diversification of cooling modes through the combination of each cooling group, but it has the following disadvantages: The increase in water volume is limited, and the rapid cooling function required by some steel types (such as hot-rolled dual-phase steel, hot-rolled martensitic steel, etc.) cannot be realized (cooling rate is required to be a

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