Composite Casting-Rolling Layout for Ultra-Thin Hot Strip Output
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Solution Overview
Problem
Current metalurgy techniques lack an energy-efficient method for producing ultra-thin warm tapes with high capacity, as existing systems face limitations in throughput and stability, especially in achieving thicknesses below 1.2 mm, and require additional cold rolling processes.
Innovation Solution
A Gieß-Walz composite system with separate strand casting systems and a Brammen manipulator to evenly heat bridges to rolling temperature, followed by a pre-rolling plant, coil box, and multi-frequency rolling mill to produce high-quality ultra-thin warm tapes with a capacity between 3.5 and 5 million tons per annum.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional hot rolling mills are used to produce thin strips, then high throughput is achieved, but final strip thickness must exceed 1.2 mm requiring subsequent cold rolling
Solution Approach 1:
The rolling process is segmented into roughing mill (for thickness reduction) and finishing mill (for final thickness control), allowing the system to achieve both high throughput and ultra-thin final thicknesses below 1.2 mm
Solution Approach 2:
The invention introduces a new dimension by integrating multiple continuous casting plants (two or three strands) feeding into a single rolling mill, enabling high capacity production of ultra-thin strips without requiring subsequent cold rolling
2Reliability
If conventional continuous casting and hot rolling are combined, then stable casting conditions are achieved, but casting speed is limited to approximately 6 m/min
Solution Approach 1:
The system segments the casting process into multiple independent continuous casting plants, each operating at stable speeds while collectively increasing total throughput beyond the limitation of individual casting speed
Solution Approach 2:
Multiple copies of continuous casting plants are used in parallel, each maintaining stable casting conditions while the aggregate output achieves high production capacity without requiring individual casting speeds to exceed 6 m/min
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 system achieves high production capacity and quality while reducing energy consumption by ensuring consistent heating and thermal insulation, enabling the production of ultra-thin warm tapes without the need for downstream cold rolling.
Implementation Method 1
The produced slabs are thermally insulated and fed to a slab manipulator
Implementation Method 2
In the walking beam furnace, which is, for example, gas- or oil-fired, the slabs from the continuous casting plants are heated uniformly to rolling temperature
Data Source
Figure 1
Figure 1A~2
Figure 3
AI summary
The invention relates to a casting-rolling integrated plant and to a method for producing a hot strip with a final thickness of < 1.2 mm on the casting-rolling integrated plant. The problem addressed by the invention is that of specifying a casting-rolling integrated plant of this kind and a method of this kind, by means of which high-quality ultra-thin hot strip with high capacitance, i.e. with a capacitance between 3.5 and 5.5 M t/a, can be produced by extrusion and hot rolling on the casting-rolling integrated plant. This problem is solved by a casting-rolling integrated plant according to claim 1.