Twin Casting Machine Width Segmentation for Hot-Rolled Strip Production
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Solution Overview
Problem
Existing casting-rolling plants are inflexible and energy-inefficient, limiting production capacity and increasing energy consumption due to the need for multiple furnaces to reheat slabs or coils to rolling temperature.
Innovation Solution
A twin casting machine that produces cast strands with widths adjustable to either match or exceed the rolling width threshold, with a switch device diverting slabs to either the rolling train or a special treatment facility, and a holding furnace for efficient reheating of slabs, ensuring continuous production and reduced energy expenditure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If slabs are stored and then reheated for rolling, then production continuity is maintained, but energy consumption increases significantly
Solution Approach 1:
The patent applies preliminary action by performing selective width-based sorting of slabs immediately after casting, before they cool down. This allows direct routing of suitable slabs to the rolling mill without storage and reheating, thereby maintaining production continuity while minimizing energy consumption through selective preprocessing.
2Device complexity
If a single-strand caster is used, then device complexity is reduced, but production flexibility and capacity are limited
Solution Approach 1:
The patent applies segmentation by dividing the cast strand into individual slabs with different widths and routing them through different paths based on their width characteristics. This segmentation allows a single caster to serve multiple production needs (different rolling mill requirements) without requiring multiple casting strands, thus maintaining simplicity while increasing flexibility.
Solution Approach 2:
The patent applies dynamics through the switch device that can dynamically route slabs to different destinations based on real-time width measurements and production requirements. This dynamic routing capability enables the system to adapt to varying rolling mill demands without changing the physical casting configuration, thereby increasing versatility while maintaining device simplicity.
3Productivity
If slabs are cooled during storage, then production breaks in casting are accommodated, but reheating energy requirements increase
Solution Approach 1:
The patent applies preliminary action by performing width-based classification and selective routing of slabs immediately after casting, before cooling occurs. This allows slabs that will be used soon to be sent directly to the rolling mill while maintaining their temperature, eliminating the need for subsequent reheating and reducing energy losses.
4Device complexity
If casting machine width is matched to rolling train width, then system simplicity is maintained, but production capacity and flexibility are reduced
Solution Approach 1:
The patent applies segmentation by dividing the output of a wide cast strand into multiple slabs of different widths through controlled casting techniques. These segmented slabs can then be routed to different rolling mills with different width capabilities, allowing a single high-capacity caster to serve multiple rolling trains and thereby increase overall production capacity without increasing system complexity.
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
This configuration enhances production flexibility and output while minimizing energy consumption by allowing direct feeding of slabs to the rolling mill and optimizing the use of reheating furnaces, ensuring high productivity and cost-effectiveness.
Implementation Method 1
a holding furnace for efficient reheating of slabs
Data Source
Figure 1
AI summary
The invention relates to a device and method for producing hot-rolled strips (260), wherein the device comprises the following features: a casting machine (110) for producing at least one cast strand (120), a separating unit (125) for severing slabs (130) from the cast strand (120), a rolling train for producing the hot-rolled strip from the slabs having a width smaller than a rolling width threshold value, and a transport system comprising a distributing guide (140) for selectively transporting the slabs out of the casting machine either into the rolling train or to a special treatment unit (400). In order to allow the plant to operate more effectively, according to the invention the casting machine is designed as a twin casting machine for producing the at least one cast strand having a width that is smaller or larger than the rolling width threshold value, and a control unit is provided for the distributing guide in order to branch off the slabs having a width smaller than the rolling width threshold value into the rolling train and in order to branch off the slabs having a width larger than the rolling width threshold value for the special treatment unit.