Angled Electrode Orientation in Electro-Slag Remelting
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Solution Overview
Problem
Existing electroslag remelting plants face limitations in achieving high melting rates with small consumable electrode cross-sections, as the melting rate is primarily dependent on the cross-sectional area and slag temperature, restricting the production of larger ingots.
Innovation Solution
The consumable electrode is aligned at an angle between 20° and 60° to the vertical, increasing the effective melting surface area and allowing for the use of longer electrodes, which are tracked to maintain efficient operation and quick replacement, eliminating the need for welding multiple electrodes together.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the cross-sectional area of the electrode is increased to achieve higher melting rates, then the melting rate increases, but the mold diameter must also be increased which limits the production of small ingots
Solution Approach 1:
The electrode is positioned at an angle (20°-60°) to the vertical axis, transforming the melting interface from a vertical cross-section to an inclined surface. This angular orientation increases the effective melting area by a factor of 1/cos(α) without requiring a larger mold diameter, as the extended electrode surface projects into the mold at an angle rather than requiring increased horizontal dimensions.
2Productivity
If multiple electrodes are welded together to create a thicker electrode for higher melting rates, then the melting rate increases, but the device complexity and manufacturing complexity increase
Solution Approach 1:
Instead of changing the electrode's cross-sectional area by welding multiple electrodes together, the invention changes the geometric parameter of electrode orientation. A single electrode positioned at an angle (20°-60° to vertical) provides increased effective melting area through its inclined surface, eliminating the need for complex multi-electrode assemblies while achieving the same productivity enhancement.
3Productivity
If the slag temperature is increased to achieve higher melting rates, then the melting rate increases, but the maximum slag temperature is limited by material constraints
Solution Approach 1:
The invention combines multiple factors to achieve higher melting rates: the angled electrode orientation increases the effective melting area, and this geometric enhancement works synergistically with optimized slag temperature within material limits. The increased surface area compensates for the temperature constraint, allowing the system to operate at maximum safe slag temperatures while achieving higher overall melting rates through the expanded thermal interaction area.
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 melting rates by increasing the effective melting surface area, reduces system height, minimizes electrode change time, and allows for the production of larger ingots without increasing the mold diameter, while maintaining efficient energy absorption and slag interaction.
Implementation Method 1
The temperature required to melt the melting electrode is generated by a high-intensity electric current flowing through the electrode, the slag, and the molten metal. The slag presents an electrical resistance, which heats up due to the current flow.
Implementation Method 2
The molten metal falls through a liquid slag above a melt in the mold, where a chemical reaction removes contaminants such as sulfur and other non-metallic elements.
Data Source
Figure 1~2
AI summary
The aim of the invention is to increase the melting rate in an electro-slag remelting installation without an increase in the cross-sectional area (12) of the consumable electrode (4). In order to achieve said aim, it is proposed that said consumable electrode is introduced obliquely into the mold (1) of the electro-slag remelting installation, so that the consumable surface (13), which is significant with respect to the melting rate, is increased in relation to the cross-sectional area (12).