Scrap Submergence Well with Interior Wall for Aluminum Recycling
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Solution Overview
Problem
Melting thin-walled aluminum scrap pieces in traditional recycling processes is challenging due to high oxidation loss and difficulty in submerging them into molten metal, as they float and are exposed to hostile atmospheres.
Innovation Solution
A scrap submergence system with a chamber design featuring a heat-resistant material construction, including an inlet and outlet on side walls with an interior wall that creates a waterfall effect to induce molten metal flow, facilitating the submergence of scrap pieces through the formation of submerging currents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If thin-walled scrap pieces are exposed to hostile atmosphere in traditional melting furnace, then melting process can proceed, but oxidation loss becomes extremely high
Solution Approach 1:
The patent creates a controlled environment within the charging well by inducing molten metal flow that submerges scrap pieces, effectively creating a protective atmosphere that reduces oxidation. The continuous flow of molten metal acts as a barrier between the scrap and the hostile furnace atmosphere.
Solution Approach 2:
The patent employs rapid submergence of scrap pieces into molten metal through induced flow currents. By rushing the scrap pieces through the molten metal bath quickly, the exposure time to hostile atmosphere is minimized, reducing oxidation loss while maintaining melting productivity.
2Loss of substance
If thin-walled scrap pieces are rapidly submerged in molten metal, then oxidation loss is reduced, but submergence is severely hampered by floating scrap
Solution Approach 1:
The patent uses hydrodynamic principles by inducing molten metal flow through the charging well. The flowing molten metal creates currents that overcome the buoyancy of floating scrap pieces, forcing them downward into the bath for rapid submergence and melting.
Solution Approach 2:
The patent transforms the static floating scrap problem into a dynamic solution by continuously inducing molten metal flow. The dynamic flow conditions create forces that actively submerge the scrap pieces, converting a passive floating state into an active submergence process.
3Ease of operation
If mechanical systems with rotors are used to create molten metal flow, then scrap submergence is improved, but device complexity increases
Solution Approach 1:
The patent extracts the complex mechanical rotor system from the charging well design and replaces it with a simplified flow induction approach. By removing the mechanical complexity while retaining the essential function of creating molten metal circulation, the design achieves scrap submergence with fewer moving parts.
Solution Approach 2:
The patent enables the molten metal itself to perform the submergence function through induced flow. Instead of using external mechanical devices, the system uses the molten metal's own movement and circulation patterns to achieve scrap submergence, eliminating the need for complex mechanical subsystems.
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 design effectively reduces oxidation loss and enhances the submergence of scrap pieces, leading to rapid melting and improved recycling efficiency.
Implementation Method 1
a folding of flowing molten metal is used to submerge scrap metal pieces
Implementation Method 2
the flow of molten metal into the chargewell is manipulated in such a manner to achieve a vortex which draws chips from the top surface into the bath
Data Source
AI summary
A scrap submergence device having an open top chamber including walls constructed of a heat resistant material is provided. The chamber includes an inlet in the side wall of the chamber for receiving molten metal, an outlet in the side wall of said chamber, and an interior wall extending from the base wall. The interior wall has a height lower than a height of the at least one side wall. The inlet is disposed on a first side of the interior wall and the outlet is disposed on a second side of the interior wall.