Cast-Rolling Strip Production With Switchable Rolling Modes
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Solution Overview
Problem
Existing thin-slab cast-rolling installations lack flexibility in adapting to various operating conditions, such as strip thickness and casting speed, which affects quality and energy consumption.
Innovation Solution
The method allows for flexible operation by selecting among different operating modes, including continuous rolling, single-strip rolling, and semi-continuous rolling, with specific connections and separations between casting, roughing, and finishing trains, and the use of shears to manage material flow and temperature, without inductive heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed operating mode is used in cast-rolling installation, then process stability is maintained, but flexibility to adapt to various operating conditions deteriorates
Solution Approach 1:
The patent applies dynamics by enabling the cast-rolling installation to switch between different operating modes (continuous rolling, single-strip rolling, semi-continuous rolling) based on production requirements. The system transitions from a fixed operating mode to a dynamic, adaptable system where the operating mode can be changed without fundamental redesign, allowing flexibility while maintaining operational stability through standardized switching procedures.
Solution Approach 2:
The patent implements universality by designing the cast-rolling installation to perform multiple functions through different operating modes. The same physical equipment (casting machine, roughing train, finishing train) can operate in continuous mode for high-volume production, single-strip mode for small batches or thick strips, or semi-continuous mode for intermediate scenarios, making the system universally applicable to various production conditions without requiring separate dedicated equipment for each mode.
2Productivity
If continuous rolling is used to maintain high productivity, then output increases, but adaptability to different strip thicknesses and quality requirements deteriorates
Solution Approach 1:
The patent applies segmentation by dividing the rolling process into distinct stages (casting machine, roughing train with multiple stands, finishing train with multiple stands) that can operate semi-independently. This allows different sections to be optimized for their specific functions while maintaining overall continuous production. The roughing train can prepare strips at various thicknesses before the finishing train applies final reductions, enabling adaptability to different strip thickness requirements without interrupting the overall continuous rolling process.
3Adaptability or versatility
If multiple shears and separation points are introduced to enable flexible operating modes, then adaptability improves, but device complexity increases
Solution Approach 1:
The patent uses shears as intermediary devices that enable transitions between different operating modes. The first shear separates slabs from the continuous casting process to enable single-strip rolling in the roughing train. The second shear separates rough strips to enable single-strip rolling in the finishing train. These intermediary separation points act as control mechanisms that allow the system to switch between continuous and batch modes without requiring complete system redesign, managing complexity through modular separation capabilities.
Data Source
AI summary
A method for producing a metal strip in a cast-rolling installation, the cast-rolling installation includes the following: a casting machine, a first furnace, a first shear, a roughing train, a second furnace, a second shear, a finishing train, a cooling section, a reeling system, and a third shear. In order to allow a flexible reaction to different operating conditions, at least one of the following operating modes is selected in order to produce the strip: a) a continuous rolling, in which the casting machine, the roughing train, and the finishing train are operatively connected together; b) a continuous rolling in the roughing train and a single-strip rolling in the finishing train; c) a single-strip rolling in the roughing train and a single-strip rolling in the finishing train; and d) a semi-continuous rolling in the roughing train and/or a semi-continuous rolling in the finishing train.