Refractory Ceramic Gas Purging Plug Coating
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing refractory ceramic gas purging plugs with metal casings face issues of incomplete mortar bonding, reduced refractoriness, and rapid wear due to metallurgical attack and high temperatures, leading to shorter service life and gas diffusion through the peripheral surface.
Innovation Solution
A thin refractory coating is applied to the outer surface of the metal casing, using a lacquer with refractory grains that adhere well, protect against heat, and react with the metal and surrounding refractory material to enhance temperature resistance and bonding, preventing gas diffusion and wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal casing is used to guide gas and prevent lateral diffusion, then gas flow control is improved, but the metal casing disintegrates under high temperature and metallurgical attack
Solution Approach 1:
The patent combines metal casing with refractory coating materials to create a composite structure. The metal provides mechanical strength and gas flow guidance, while the refractory coating protects against high temperature and metallurgical attack, extending service life under harsh conditions.
Solution Approach 2:
The refractory coating acts as an intermediary layer between the metal casing and the harsh environment (molten metal and oxygen lance). This intermediate layer protects the metal from direct contact with corrosive substances and extreme temperatures.
2Ease of manufacture
If mortar is used to bond the plug to the refractory lining, then installation is achieved, but incomplete bonding occurs leading to mortar loss
Solution Approach 1:
The refractory coating is applied locally to the outer surface of the metal casing where it contacts the refractory lining and mortar. This localized treatment improves bonding at the interface without requiring changes to the entire plug structure.
Solution Approach 2:
The refractory coating creates a homogeneous interface between the metal casing and the surrounding refractory materials (mortar and lining). This homogeneity in material properties at the bonding interface improves adhesion and prevents mortar loss.
3Temperature
If the metal casing is exposed to temperatures above 1000°C, then gas purging function is maintained, but the metal casing gradually disintegrates due to heat and metallurgical attack
Solution Approach 1:
The patent utilizes controlled chemical reactions between the refractory coating and the metal casing under heat to form protective compounds. The harmful high temperature environment is converted into a beneficial process that strengthens the protective layer and enhances the overall heat resistance of the assembly.
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 refractory coating improves the bonding of the metal casing with the surrounding refractory material, increases temperature resistance, reduces wear, and extends the service life of the gas purging plug by preventing gas leakage and enhancing chemical reactions, thus providing a more durable and effective gas purging solution.
Implementation Method 1
It allows chemical reactions with the metal casing under heat, thus increasing the temperature resistance of the metal casing
Implementation Method 2
It protects the metal casing against excessive heat
Data Source
Figure 1~2
AI summary
The invention relates to a refractory ceramic gas purging plug, with a gas inlet at a first end, the so-called cold end, a gas outlet at a second end, the so-called hot end, and a peripheral surface extending between first and second end.