Design method of hot-rolling strip steel rolled cooling line

Abstract

The invention discloses a design method of a hot-rolling strip steel rolled cooling line. The design method comprises the following steps of: determining the header arrangement mode of the cooling line; calculating the upper header flow rate; calculating the lower header flow rate; calculating the side-spraying header flow rate; calculating the hot flow density; calculating the cooling capability of a single upper header and a single lower header; calculating the total water quantity; checking the flow rate; drawing a cooling line equipment arrangement diagram; simulating the cooling process; and generating the design information report. In the design, the method of combining the rolling procedure and the equipment structure is adopted, so the whole design process is very clear. The design method can adopt the computer program for calculation, so the design period is short. The design method adopts the calculation method of combining the theoretical model and the field actual data, so the equipment parameter calculation is accurate. The design method has the advantages that the calculation result practicability is fully considered, and the complete one-package service can be provided from the cooling line design and the process calculation to bidding document making and the like.

Description

technical field [0001] The invention belongs to the technical field of metal rolling, in particular to a method for designing a post-rolling cooling line for hot-rolled strip steel. Background technique [0002] Since the first laminar cooling system was applied to the 432mm narrow-strip hot rolling mill in Briens Oth, UK in the 1960s, the effect of accelerated cooling on strip steel grain refinement and structural strengthening has made people deeply aware of the "Water is the cheapest alloying element" and began to focus on the accelerated cooling process after hot rolling. In order to improve the cooling effect, various cooling methods have been proposed at home and abroad, such as: pressure spray cooling, laminar flow cooling, water curtain cooling, atomization cooling, spray cooling, plate turbulent cooling, water-gas spray accelerated cooling and other forms . Laminar flow cooling is widely used because of its high cooling efficiency and relatively uniform cooling on...

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Problems solved by technology

[0003] As early as the 1970s and 1980s, our country's scientific research and technical personnel have carried out more detailed research on the flow mechanism, flow coefficient and design parameters of the cooling device of the curved tube laminar flow cooling, but limited by the level of understanding and the lack of process inheritance. Due to the continuous impact, most domestic design institutes still design the cooling line by directly applying foreign design data or simply comparing the width of the rolling line. The design process is not clear, the design cycle is long, the calculation of equipment parameters is not accurate, and the practicability is poor.

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