Induction Tapping Device for Melt Discharge
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Solution Overview
Problem
Existing methods for tapping molten materials, such as glass-ceramic melts, face issues with viscosity changes when exposed to the outside, leading to incomplete discharge and electrode exposure to high-temperature plasma, which affects thermal efficiency and safety.
Innovation Solution
A tapping device and method using induction heat with a melt tapping hole positioned lower than the melting furnace bottom and higher than its floor, incorporating a graphite heating unit, induction coil, insulator, supporter, and firebricks to maintain a fixed molten metal quantity and control heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If melt tapping hole is disposed at the bottom level of melting furnace, then complete discharge of melt is achieved, but viscosity of melt grows rapidly when exposed to outside causing tapping to stop or become unsmooth
Solution Approach 1:
The patent applies local quality by creating a specific thermal environment at the tapping hole location. The insulator is positioned around the tapping hole to maintain high temperature locally, preventing viscosity increase of the melt as it exits. This localized heat treatment ensures the melt remains fluid and taps smoothly without affecting the overall furnace temperature distribution.
Solution Approach 2:
The patent implements preliminary action by pre-heating the tapping hole area using the insulator before melt discharge. This ensures that when the melt reaches the tapping hole, the surrounding environment is already at the required temperature to prevent rapid viscosity increase. The insulator is positioned in advance to maintain thermal conditions optimal for continuous tapping.
2Productivity
If melt tapping hole is disposed at the bottom level of melting furnace, then complete discharge of melt is achieved, but electrode exposed to plasma of high temperature is easily consumed
Solution Approach 1:
The insulator serves as an intermediary element between the high-temperature plasma and the electrode. It is positioned to block direct contact between the plasma and electrode, reducing heat transfer to the electrode. This mediator allows complete melt discharge while protecting the electrode from excessive thermal exposure that would cause rapid consumption.
Solution Approach 2:
The patent converts the harmful high-temperature plasma exposure into a beneficial configuration by using the insulator to redirect and contain the plasma. The plasma energy is channeled to heat the melt effectively while the insulator prevents this same energy from damaging the electrode. The harmful thermal exposure is thus transformed into useful melt heating while protecting the electrode.
3Productivity
If induction heating is used for tapping, then thermal efficiency and melting speed are increased, but structure complexity increases with multiple components
Solution Approach 1:
The insulator performs multiple functions simultaneously: it insulates the tapping hole area to maintain high temperature, protects the electrode from plasma exposure, and supports the structural integrity of the tapping system. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity while maintaining high thermal efficiency and melting speed.
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 ensures complete discharge, increased thermal efficiency, automated plasma melting, and improved safety by preventing electrode exposure to high temperatures and allowing adjustable tapping.
Implementation Method 1
induction coil wound around the heating unit
Implementation Method 2
heating unit disposed in the upper part in the melting furnace and made of graphite material
Implementation Method 3
melting the solidified melt inside tapping hole and discharging it downwards by gravity
Data Source
AI summary
A tapping device and method using induction heat for melt comprises melting furnace made of steel; heating unit disposed in the upper part in the melting furnace and made of graphite material; induction coil wound around the heating unit; insulator disposed adjacent to the bottom surface of the lower part of the melting furnace; supporter disposed outside the insulator; and firebricks disposed on the bottom surface of melting furnace and outside the supporter.