Fly Ash Ceramic Tiles Using Plasticising Agent Binding
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Solution Overview
Problem
The challenge lies in manufacturing fly ash-containing articles, such as tiles, that are cost-competitive, of consistent quality, and possess adequate structural and technical properties for industrial-scale production, while minimizing environmental impact due to the presence of heavy metals like cadmium, chromium, zinc, and lead in fly ash.
Innovation Solution
A fly ash composition incorporating a plasticizing agent, which is capable of binding fly ash particles together, is used to form a sintered matrix in ceramic articles. This composition is in a powder form with a near-dry appearance, low water content, and includes a high percentage of fly ash, along with ceramic additives, to achieve sufficient green strength for handling and sintering, thereby reducing energy consumption and environmental footprint.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If fly ash is used as a raw material for ceramic tiles, then environmental impact is reduced and disposal problems are minimized, but the articles suffer from inadequate structural properties and inconsistent quality
Solution Approach 1:
The patent uses composite materials by combining fly ash with specific binders (e.g., Portland cement, lime, or aluminum silicate) and ceramic additives to create a material that maintains the environmental benefits of fly ash utilization while achieving adequate structural strength and consistent quality for ceramic tile applications
Solution Approach 2:
The patent applies parameter changes by optimizing the chemical composition ratios (e.g., CaO content between 3-10%, SiO2/Al2O3 ratios), particle size distribution, and firing temperature parameters to transform fly ash into a material with sufficient structural properties for load-bearing ceramic applications
2Ease of manufacture
If fly ash is used to replace clay in high volume ratios, then production costs are reduced and environmental footprint is minimized, but the articles exhibit insufficient green strength for handling
Solution Approach 1:
The patent introduces binders such as Portland cement, lime, or aluminum silicate as intermediary materials that bridge the gap between fly ash particles, providing the necessary green strength for handling and processing while maintaining high fly ash content (70-95% by weight) to keep production costs low and environmental impact minimal
3Device complexity
If conventional fly ash processing methods are used, then manufacturing simplicity is maintained, but energy consumption is high and production efficiency is low
Solution Approach 1:
The patent applies preliminary action by pre-processing fly ash through classification to optimize particle size distribution before mixing with binders and additives. This preliminary preparation ensures proper packing density and reduces the energy required during subsequent mixing, forming, and firing operations, thereby improving overall production efficiency without adding significant processing complexity
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 approach enables the production of high-quality, cost-competitive ceramic products like tiles and slabs with improved flexural strength and reduced water absorption, facilitating industrial-scale manufacturing with lower energy input and environmental impact.
Implementation Method 1
a plasticising agent, the composition being in a powder form, wherein the plasticising agent is capable of binding the fly ash particles in the fly ash composition together on pressing of the fly ash composition
Implementation Method 2
a method of forming a shaped article having a matrix containing sintered fly ash
Data Source
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AI summary
A fly ash composition including fly ash and a plasticising agent and being in a powder form is disclosed. The plasticising agent is capable of binding the fly ash particles in the fly ash composition together on pressing of the fly ash composition. Processes of forming shaped articles containing fly ash may utilise the fly ash composition and/or mixtures containing fly ash and have low water content and may exhibit sufficient green strength to be handled by industrial equipment.