Metal Transfer Trough with Fluidized Bed Cooling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current metal transfer troughs face inefficiencies in cooling molten metal during transfer to a casting station, leading to production slowdowns due to overheated metal, and lack effective temperature control, resulting in increased energy costs and reduced production rates.
Innovation Solution
A cooling trough with a refractory portion made of conductive ceramic material and a fluidized bed compartment for heat transfer, featuring fins and a cooling jacket to efficiently extract heat from molten metal, allowing for controlled temperature adjustment by varying fluidization and water flow rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the transfer trough is insulated to minimize heat loss, then energy is preserved, but the molten metal cannot be cooled when too hot for delivery
Solution Approach 1:
The trough applies different thermal properties to different sections: the first section has insulation with thermal conductivity of 0.5-2.0 W/m·K to preserve heat, while the second section has enhanced heat transfer with thermal conductivity of 1.0-3.0 W/m·K to enable cooling. This local differentiation resolves the contradiction by allowing heat preservation where needed and heat removal where needed.
Solution Approach 2:
The system transitions from a static insulated trough to a dynamic system with variable heat transfer characteristics. By adjusting the thermal conductivity of the trough walls through material selection and design, the system can adapt its heat transfer rate to match the temperature control needs at different stages of metal transfer.
2Temperature
If the casting rate is slowed down to allow metal to cool, then temperature control is achieved, but production rate decreases
Solution Approach 1:
The invention extracts the cooling function from the casting process itself and places it in a dedicated pre-cooling section of the trough. This separation allows continuous casting at optimal rates while independent cooling control is achieved in the first section, eliminating the need to slow down production for temperature management.
Solution Approach 2:
The trough performs preliminary cooling action in the first section before the metal reaches the casting station. By pre-cooling the metal to the target temperature range (600-700°C) before delivery, the system eliminates the need for subsequent cooling delays at the casting station, maintaining continuous high-speed production.
3Temperature
If the holding time in the crucible is increased to cool the metal, then temperature is reduced, but production slows down
Solution Approach 1:
The invention replaces the passive time-based cooling method (holding in crucible) with an active heat transfer system. Instead of relying on natural cooling over extended periods, the system uses controlled heat transfer through the trough walls with optimized thermal conductivity, achieving the same cooling effect in significantly reduced time.
4Loss of energy
If standard insulating refractory materials are used, then heat loss is minimized, but heat extraction efficiency is reduced
Solution Approach 1:
The trough is segmented into two functional sections with different thermal properties. The first section uses standard insulating materials (0.5-2.0 W/m·K) to minimize heat loss, while the second section uses materials with higher thermal conductivity (1.0-3.0 W/m·K) to enhance heat extraction. This segmentation allows both heat preservation and efficient heat removal within the same system.
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 trough enables efficient cooling and temperature control of molten metal, reducing cycle time, energy costs, and the number of furnaces required, while maintaining production rates by effectively managing heat extraction and delivery to the casting station.
Implementation Method 1
heat transfer means that is associated to external walls of the refractory portion for extracting heat from the molten metal. Advantageously, the heat transfer means comprises a fluidized bed
Implementation Method 2
The refractory portion can be shaped to further facilitate heat removal
Implementation Method 3
the trough comprises a refractory portion for holding the molten metal and heat transfer means that is associated to external walls of the refractory portion for extracting heat from the molten metal
Data Source
AI summary
A trough for cooling and delivering molten metal to a casting station. The trough comprises a refractory portion for holding the molten metal and heat transfer means associated to external walls of the refractory portion for extracting heat from the molten metal. The heat transfer means may comprise a fluidized bed compartment for holding and fluidizing a fluidization material. Also, the heat transfer means may comprise a cooling jacket, an inner wall of the cooling jacket and the external walls of the refractory portion defining the fluidized bed compartment.