Layered Molten Metal Furnace Lining for Leakage and Heat Control
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Solution Overview
Problem
Conventional molten metal furnaces face issues with molten metal leakage and inefficient heat radiation, leading to inefficiencies and safety hazards due to continuous energy supply and potential damage from cracking.
Innovation Solution
A molten metal furnace design featuring multiple lining layers with a refractory material in contact with the molten metal, interspersed with sealing materials made of ceramic or bio-soluble ceramic fibers and thermal insulation boards containing silicon dioxide, to control heat radiation and direct molten metal leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional refractory layer is used to prevent molten metal leakage, then the furnace body structure is simple, but molten metal permeates through cracking and causes leakage after prolonged use
Solution Approach 1:
The refractory layer is divided into multiple distinct layers: a first refractory layer in direct contact with molten metal, a second refractory layer, and a back-up layer. This segmentation allows each layer to perform specific functions - the first layer resists chemical attack, the second layer provides structural support, and the back-up layer prevents leakage - thereby improving overall reliability and extending service life
Solution Approach 2:
The patent employs composite refractory material structures with different compositions and properties for each layer. The first refractory layer uses materials resistant to molten metal penetration, while subsequent layers use materials optimized for thermal stability and structural integrity, creating a composite system that simultaneously addresses chemical resistance, mechanical strength, and long-term durability
2Temperature
If the furnace body radiates heat to maintain molten metal temperature, then the molten metal is held at required temperature, but excessive energy is consumed and surface temperature rises causing safety hazards
Solution Approach 1:
The patent incorporates a thermal insulation layer between the refractory layer and the outer furnace shell. This insulation layer acts as a preparatory protective barrier that reduces heat loss to the environment, thereby maintaining molten metal temperature while significantly reducing the energy input required and preventing excessive surface temperature rise
Data Source
AI summary
A molten metal furnace in which molten metal leakage may be avoided or controlled and heat radiation from the furnace body may be controlled. The molten metal furnace has an outer wall on its outer periphery, a molten metal storage part for holding a molten metal therein, and an inner wall forming the molten metal storage part and having a plurality of lining layers, wherein a first lining layer of the plurality of lining layers, having a surface to be in contact with the molten metal, is formed of a refractory material, wherein a sealing material is provided along at least two boundaries present in a range between the first lining layer and the outer wall, and wherein a lining layer sandwiched between layers of the sealing material is formed of a thermal insulation board containing at least silicon dioxide (SiO2).