Glass Melt Redox Purification for Removing Coloring Impurities
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Solution Overview
Problem
Existing glass recycling methods face challenges in removing foreign substances and coloring components, leading to production defects and inefficient recycling of waste and defective glasses.
Innovation Solution
A glass production method involving melting a glass-containing raw material, followed by reduction and oxidation treatments to precipitate and separate metal phases, effectively removing impurities and coloring components without using phase separation, resulting in high-quality glass production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If phase separation phenomenon is used to remove coloring components, then coloring components can be removed, but the process becomes complicated and useful components are also removed
Solution Approach 1:
The patent extracts and removes only the harmful metal components (coloring components and foreign substances) from the glass melt through selective reduction and separation, while preserving the useful glass components. This is achieved by adding a reducing agent that selectively reduces metal oxides to metal particles, which then separate from the melt and can be removed, leaving the desired glass composition intact.
Solution Approach 2:
The patent changes the chemical state of metal components by controlling the oxidation-reduction potential of the melt. By adjusting parameters such as temperature, reducing agent addition, and holding time, the metal components are transformed from dissolved oxide state to precipitated metal state, enabling their separation while maintaining the stability of the glass matrix components.
2Manufacturing precision
If phase separation phenomenon is used to remove coloring components, then coloring components can be removed, but useful components such as alkali metal are also removed
Solution Approach 1:
The patent converts the harmful effect of metal coloring components into a beneficial separation process. By intentionally introducing a reducing agent, the dissolved metal oxides are reduced to metal particles that naturally separate from the glass melt due to density differences. This transforms the harmful dissolved state into a removable precipitated state, while the useful glass components remain in the melt.
Solution Approach 2:
The reducing agent acts as an intermediary substance that facilitates the selective transformation and separation of metal components. It mediates between the dissolved metal oxides and the desired metal particle form, enabling controlled precipitation without affecting the glass matrix components. The reducing agent provides a mechanism for selective removal of harmful elements while preserving useful ones.
3Productivity
If waste glass containing foreign substances is recycled directly, then recycling efficiency improves, but production defects increase
Solution Approach 1:
The patent performs preliminary treatment of waste glass before final product formation. By conducting reduction and separation operations on the melt, the process removes foreign substances and coloring components early in the recycling process, preventing them from causing defects in the final product. This preliminary purification enables high-quality output from mixed waste glass inputs.
Solution Approach 2:
The patent replaces mechanical sorting and separation methods with chemical reduction and thermal separation processes. Instead of physically separating foreign substances before melting, the chemical process transforms and separates them during melting, achieving more effective removal of contaminants while maintaining high recycling rates.
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 method enables efficient recycling of waste and defective glasses by removing unnecessary substances and reducing defects, producing high-quality glass with improved transparency and reduced coloring.
Implementation Method 1
a reducing agent comprising at least one selected from a simple substance and a compound containing at least one element selected from C, Si, and H
Implementation Method 2
precipitating a metal phase by subjecting the first melt to a reduction treatment
Implementation Method 3
subjecting the second melt to an oxidation treatment
Implementation Method 4
obtaining a first melt by melting the glass-containing raw material
Data Source
AI summary
The present invention provides a method for producing glass that can suitably remove unnecessary substances and unnecessary components from glass that contains foreign matter, etc., or glass that contains colored components or unnecessary components, so that high-quality glass having a low incidence of manufacturing defects and unnecessary coloration is obtained. The method for producing glass of the present invention includes: melting a glass-containing raw material to obtain a first melt; subjecting the first melt to reduction treatment, and causing a metal phase to precipitate; separating at least part of the metal phase from the first melt and obtaining a second melt; and subjecting the second melt to an oxidation treatment.