Sulphur Solidification Using Elastic Pressure Waves
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Solution Overview
Problem
The existing methods for solidifying sulphur, such as forming flakes or pellets, are complex, labor-intensive, and result in fragile, uneven materials with internal tensions and cavities, posing handling and storage challenges due to sulphur's limited heat conductivity and polymorphic characteristics.
Innovation Solution
Applying elastic pressure waves during the cooling of liquid sulphur induces a metastable state, promoting the growth of orderly crystalline structures and reducing internal tensions, allowing for the formation of high-density, mechanically robust sulphur articles without the need for additives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If large blocks of sulphur are obtained by feeding and layering in successive thin layers, then mechanical strength is improved, but solidification time and storage area increase
Solution Approach 1:
The patent applies mechanical vibration to the molten sulphur during solidification. The vibration promotes uniform cooling and crystallization throughout the sulphur mass, enabling thin-layer feeding while reducing solidification time. The vibrational energy prevents premature freezing and ensures consistent crystal formation, resolving the contradiction between achieving mechanical strength through layering and minimizing solidification time.
2Temperature
If coolants are used to form sulphur into flakes or pellets, then heat transport is improved, but device complexity and labor intensity increase
Solution Approach 1:
The patent employs self-service by using the molten sulphur's own thermal properties and the vibration-induced convection currents to achieve uniform cooling. The sulphur mass itself acts as the cooling medium through internal convection, eliminating the need for external coolant systems. This resolves the contradiction between improving heat transport and reducing equipment complexity.
3Productivity
If rapid cooling is applied to molten sulphur, then productivity is improved, but crystalline structure uniformity deteriorates
Solution Approach 1:
The patent applies mechanical vibration during rapid cooling to maintain crystalline structure uniformity. The vibration induces convection currents that distribute heat uniformly throughout the sulphur mass, preventing localized overheating or premature crystallization. This allows rapid cooling while ensuring consistent crystal formation, resolving the contradiction between productivity and structural uniformity.
4Strength
If chemical additives are used to modify sulphur properties, then mechanical characteristics are improved, but purity and environmental impact worsen
Solution Approach 1:
The patent uses self-service by relying on the sulphur's own physical properties and vibration-induced convection to achieve uniform crystallization and improved mechanical characteristics. No external chemical additives are required, as the vibration process itself promotes orderly crystal growth and eliminates the need for purity-compromising additives. This resolves the contradiction between improving mechanical properties and maintaining purity.
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 process results in sulphur articles with controlled mechanical characteristics and improved heat dispersion, reducing the formation of irregular interiors and macrocrystals, enabling efficient handling, storage, and industrial applications.
Implementation Method 1
elastic pressure waves are applied to the cooling mass of liquid sulphur to produce a crystalline suspension of solid sulphur in liquid sulphur
Implementation Method 2
forming of the product, characterised in that elastic pressure waves are applied to the cooling mass of liquid sulphur to produce a crystalline suspension of solid sulphur in liquid sulphur
Implementation Method 3
cooling of liquid sulphur in a volume of containment until the sulphur mass solidifies
Implementation Method 4
Applying elastic pressure waves during the cooling of liquid sulphur induces a metastable state, promoting the growth of orderly crystalline structures
Data Source
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AI summary
The present invention relates to a process for the preparation of articles of manufacture made of or based on sulphur, which comprises cooling of liquid sulphur in a volume of containment until the sulphur mass solidifies and forming of the product, characterised in that elastic pressure waves are applied to the cooling mass of liquid sulphur to produce a crystalline suspension of solid sulphur in liquid sulphur. The invention also claims sulphur-based articles obtainable by the process.