Colloidal Silica AZS Refractory Composition for Furnace Corrosion
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Solution Overview
Problem
Refractory blocks in glass and brass furnaces experience significant wear and corrosion due to molten glass and brass, leading to unpredictable service life and production disruptions.
Innovation Solution
A refractory composition comprising a mixture of alumina, zirconia, and silica with a colloidal silica binder, providing excellent corrosion resistance and strength, is used to form a monolithic refractory that can be cast or applied directly to furnace surfaces, eliminating the need for traditional refractory blocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional refractory blocks are used in glass and brass furnaces, then the furnace can be constructed with standard materials, but the refractory blocks experience significant wear and corrosion leading to unpredictable service life
Solution Approach 1:
The patent applies composite materials by combining alumina, zirconia, and silica in specific proportions to create a refractory composition that leverages the corrosion-resistant properties of each component. Alumina provides high-temperature stability, zirconia offers chemical inertness, and silica contributes to corrosion resistance, collectively creating a superior refractory material that resists wear and corrosion from molten glass and brass.
Solution Approach 2:
The patent utilizes parameter changes by controlling the particle size distribution and chemical composition ratios of the refractory materials. By optimizing the proportions of alumina (45-75 wt%), zirconia (15-30 wt%), and silica (10-30 wt%), the material achieves enhanced corrosion resistance and mechanical strength, directly addressing the wear and corrosion issues in furnace environments.
2Productivity
If traditional refractory blocks are used, then the furnace structure can be assembled with standard components, but production is disrupted due to unpredictable wear spots developing
Solution Approach 1:
The composite refractory composition provides uniform corrosion resistance across the entire furnace lining, eliminating the unpredictable wear spots that disrupt production. The multi-component material ensures consistent performance throughout service life, maintaining productivity and eliminating unexpected downtime.
3Ease of manufacture
If AZS refractory blocks are made from molten material cast into molds, then the refractory can be manufactured with standard processes, but the blocks become deeply scored and develop wear spots
Solution Approach 1:
The patent changes the manufacturing parameters by using a dry mix formulation with controlled particle size distribution rather than traditional molten casting. This approach allows for better control over material density and uniformity, preventing the deep scoring and erosion that occur in cast blocks while maintaining ease of manufacture through simple mixing and application processes.
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 colloidal silica refractory composition demonstrates superior resistance to high-temperature corrosive environments, extending the service life of furnaces and maintaining performance under harsh conditions, as evidenced by reduced wear and corrosion compared to traditional refractory materials.
Implementation Method 1
The refractory composition includes a first set of components mixed with a colloidal silica binder. The first set of components includes alumina and zirconia.
Data Source
AI summary
A refractory composition includes a first set of components and a colloidal silica binder. The first set of components includes alumina and zirconia. The colloidal silica binder is provided at 5 wt % to 20 wt % of the dry weight of the first set of components. The refractory composition includes 45 wt % to 75 wt % alumina, 15 wt % to 30 wt % zirconia, and 10 wt % to 30 wt % silica.