Immersion Heating Furnace With Molten Metal Circulation
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Solution Overview
Problem
Existing melting furnaces for producing molten metal are inefficient and costly due to reliance on gas as an energy source, with room for improvement in terms of operating costs and economic efficiency.
Innovation Solution
The use of electrically heatable immersion heating elements and a circulating device to create a molten metal flow, accelerating the melting process and enhancing heat transfer, while utilizing electrical energy as a primary source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If gas is used as the primary energy source for melting metals, then the melting process can be maintained, but the operating costs and economic efficiency are reduced
Solution Approach 1:
The patent replaces the gas-based thermal heating system with an electrically operated immersion heating element. The heating element is directly immersed in the metal to be melted, transferring heat through conduction. This substitution of energy source and heating mechanism reduces operating costs while maintaining effective melting capability.
Solution Approach 2:
The patent introduces a circulating device that creates a molten metal flow as an intermediary medium. This flow carries heat from the immersion heating element to the solid metal, accelerating the melting process. The circulating molten metal acts as a heat transfer mediator between the heating element and the charge material.
2Loss of energy
If an immersion heating element is used, then heat transfer efficiency is improved, but the device complexity increases
Solution Approach 1:
The heating system is segmented into distinct functional components: the immersion heating element (power and control sections separate from the heating body), the circulating device, and the molten metal flow path. This segmentation allows each component to be optimized independently while simplifying the overall system architecture and maintenance.
Solution Approach 2:
The immersion heating element serves multiple functions: it acts as both the heat source and a structural component within the furnace. The circulating device simultaneously creates metal flow for heat transfer and maintains temperature distribution. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity.
3Productivity
If a circulating device is used to produce molten metal flow, then the melting process is accelerated, but the device complexity increases
Solution Approach 1:
The circulating device utilizes the natural properties of molten metal and thermal convection to create the circulating flow. The system leverages temperature differences and metal density variations to sustain circulation without requiring complex external pumping mechanisms. This self-service approach accelerates melting while keeping the circulating device relatively simple in structure.
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 approach reduces energy costs and enhances the efficiency of the melting process by improving heat transfer and accelerating metal melting, thereby optimizing the production of molten metals.
Implementation Method 1
the immersion heating element can be configured to convert the electrical energy into heat energy, for example by dissipating the electrical energy by means of an electrical resistor
Implementation Method 2
the circulating device, which is configured to produce a molten metal flow inside the melting furnace... the circulating device can be used to achieve a flow of hot melt around the supplied solid metal
Implementation Method 3
The immersion heating element can comprise ceramic components, in particular a ceramic outer shell or a ceramic casing. This enables an effective transfer of heat to the surrounding molten metal
Data Source
AI summary
A melting furnace for melting metal may have a first heating device having at least one electrically heatable immersion heating element. The furnace may also have a circulating arrangement designed to create a flow of molten metal within the melting furnace. A method for melting metal using the melting furnace is also provided.