Vortexer Apparatus for Scrap Submergence in Molten Metal
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Solution Overview
Problem
Existing methods for submerging metal scrap in molten metal, such as those using mechanical equipment or pumps with risers, often lead to oxidation and clogging issues, and fail to efficiently create a vortex that effectively pulls scrap down into the molten metal due to low density of scrap materials like aluminum.
Innovation Solution
A vortexer apparatus with a pump system that includes a shaft-driven impeller, a base with an impeller chamber, and an outlet conduit that introduces molten metal tangentially into a charge vessel, creating a vortex flow that pulls scrap down without exposing the molten metal to excessive oxygen and allowing for easy cleaning and repair of components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical equipment is used to physically submerge scrap in molten metal, then scrap submergence is achieved, but oxidation occurs and device complexity increases
Solution Approach 1:
The patent replaces mechanical equipment with a fluid dynamic system. A pump circulates molten metal through a nozzle to create a high-velocity jet that generates a vortex, using fluid dynamics rather than mechanical contact to submerge scrap. This eliminates oxidation caused by mechanical equipment exposure to atmosphere.
Solution Approach 2:
The patent uses a hydraulic system where molten metal is pumped through a nozzle to create a high-velocity jet. The hydraulic energy of the flowing molten metal creates the vortex effect that submerges scrap, replacing mechanical equipment with a fluid-based solution.
2Productivity
If pumps with risers are used to pump molten metal, then metal circulation is achieved, but clogging and freezing occur in the riser
Solution Approach 1:
The patent removes the riser component from the system. Instead of pumping molten metal up through a vertical riser that can clog and freeze, the pump is positioned at the bottom and directs flow horizontally through a nozzle, eliminating the problematic vertical riser section where clogging and freezing occur.
3Productivity
If scrap is added to molten metal in a charge well, then melting is intended, but low-density scrap floats and fails to submerge
Solution Approach 1:
The high-velocity molten metal jet creates a vortex with rotational motion and turbulent mixing. This vortex action mechanically agitates the molten metal and forces scrap downward against buoyancy, effectively submerging low-density scrap that would otherwise float on the surface.
Solution Approach 2:
The patent uses the hydraulic energy and fluid dynamics of a high-velocity molten metal jet to create a vortex. The fluid flow pattern generates downward forces that overcome the buoyancy of low-density scrap, forcing it to submerge and melt effectively.
4Reliability
If molten metal is pumped onto the surface, then scrap contact is achieved, but oxidation increases due to atmospheric exposure
Solution Approach 1:
Instead of pumping molten metal upward onto the surface (which causes oxidation), the patent inverts the approach by positioning the pump at the bottom and directing flow horizontally through a nozzle. The vortex is created below or at the surface level, keeping molten metal and scrap in contact without exposing them to atmospheric oxygen.
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 apparatus efficiently melts scrap metal by creating a vortex that effectively submerges and melts low-density scrap, reducing oxidation and clogging issues, and allows for easy maintenance of the pump system.
Implementation Method 1
an impeller connected to the lower end of the shaft
Implementation Method 2
Molten metal enters the vessel from the inlet opening, in particular, at a location substantially tangential to the interior surface of the vessel
Implementation Method 3
creating a vortex flow that pulls scrap down without exposing the molten metal to excessive oxygen
Data Source
AI summary
A vortexer apparatus including a vessel comprising an exterior surface, an interior surface and a mouth for receiving material at an upper end of the interior surface. An outlet passageway extends downwardly from the interior surface. An inlet opening is located between the interior and exterior surfaces above the outlet passageway. The inlet opening is offset from the center line of the interior surface. A pump is adapted to pump fluid into the vessel to form a vortex in the vessel. The base and impeller of the pump are configured and arranged effective to provide molten metal leaving the base with a positive pressure. An outlet conduit extends from the base outlet to near the vessel inlet opening and can be maintained at a temperature above which molten metal solidifies, along it's entire length.