Compact Casting-Rolling Layout for Heat Retention and Batch Flexibility
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Solution Overview
Problem
Casting-rolling mills face challenges in producing continuous and batch strip production efficiently, particularly in maintaining heat retention, energy consumption, and material homogeneity, while dealing with operational disruptions.
Innovation Solution
A casting and rolling plant design that allows for both continuous and batch strip production, with a short transport path of 50 m or less between the separating device and the first rolling stand group, incorporating electrical heating devices and a compact layout to minimize heat loss and energy consumption, and enabling inline surface treatment for high-quality strips.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the transport distance between the separating device and the first rolling stand group is reduced to 50 m or less, then heat retention is improved and energy consumption is reduced, but the plant layout becomes more compact and complex to design
Solution Approach 1:
The patent combines the casting machine, separating device, and rolling stand group into a highly integrated compact arrangement where the transport distance is reduced to 50 m or less. This merging of previously separate functional zones eliminates unnecessary transport paths and heat loss areas, directly resolving the contradiction by making the plant layout more compact while reducing energy loss.
Solution Approach 2:
The patent reconfigures the plant layout by utilizing three-dimensional space more efficiently, arranging equipment in a compact footprint that minimizes the transport path length between key components. This dimensional optimization allows the plant to achieve short transport distances without proportionally increasing layout complexity.
2Use of energy by moving object
If the transport distance between the separating device and the first rolling stand group is reduced to 50 m or less, then energy consumption is reduced, but the flexibility for operational disruptions and sampling is reduced
Solution Approach 1:
The patent segments the metal strand into slabs using the separating device positioned within the compact 50 m transport zone. This segmentation capability allows individual slabs to be processed independently, enabling sampling for API grades and emergency strip guidance while maintaining the energy-efficient short transport distance. The separating device acts as a flexible node that can operate independently of the continuous flow.
Solution Approach 2:
The separating device serves as an intermediary element between the casting machine and rolling stand group, providing operational flexibility through its ability to cut and separate slabs. This intermediary function allows the system to handle sampling, quality control, and emergency situations without disrupting the overall energy-efficient short transport path, thus resolving the contradiction between energy consumption and adaptability.
3Adaptability or versatility
If batch mode production is used to handle operational disruptions, then operational flexibility is improved, but material homogeneity deteriorates and production risk increases
Solution Approach 1:
The patent implements a dynamic production system that can operate in both continuous and batch modes through the separating device. The system dynamically adjusts its operation mode based on quality requirements and operational conditions. For API grades requiring sampling, the system can switch to batch mode with the separating device cutting slabs at predetermined lengths, while maintaining the capability for continuous production for standard grades, thus achieving both operational flexibility and material homogeneity.
4Productivity
If very thick strips are produced in continuous operation, then production efficiency is improved, but cooling and coiling difficulties increase
Solution Approach 1:
The patent uses the separating device to divide the continuously cast thick metal strand into manageable slab lengths before they enter the rolling stand group. This segmentation allows each slab to be processed independently through the rolling and cooling sections, preventing the accumulation of excessive heat in continuously moving thick strips. The separated slabs can be cooled and coiled more reliably while maintaining high production efficiency through continuous casting.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution achieves energy-efficient production with reduced energy and CO2 emissions, maintains heat retention, and ensures high-quality strip production, including inline scarfing for surface treatment, while allowing for operational flexibility and reduced plant footprint.
Implementation Method 1
a casting machine (20) for continuously casting a metal strand (2)
Implementation Method 2
a first rolling stand group (40) arranged downstream of the first separating device (30) in the transport direction for rolling the metal strand (2) or slabs (4) separated therefrom
Implementation Method 3
incorporating electrical heating devices and a compact layout to minimize heat loss and energy consumption
Data Source
Figure 1
Figure 2~3
AI summary
The invention relates to a casting and rolling mill (10), a method for continuous strip production, and a method for batch strip production. A casting machine (20) for continuously casting a metal strand (2), a first separating device (30) arranged downstream of the casting machine (20) in the transport direction (R) for separating the metal strand (2), and a first rolling stand group (40) arranged downstream of the first separating device (30) in the transport direction (R) for rolling the metal strand (2) or slabs (4) separated therefrom are provided. The transport distance (T) between the first separating device (30) and the first rolling stand group (40) is 50 m or less.