Multi-source Solid Waste Recycling via Composition Design
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Solution Overview
Problem
Existing solid waste recycling technologies lack a scientific composition design mechanism for basic oxide units in multi-source solid wastes, leading to inefficient recycling and high impurity content in products.
Innovation Solution
A multi-source solid waste recycling method based on composition design for calcium-silicon-aluminium-magnesium oxide, which involves collecting waste data, calculating optimal compositions of calcium oxide, silicon oxide, aluminium oxide, and magnesium oxide, and melting these oxides with reducing agents like carbon and metallic aluminium to produce alloys and high-value inorganic non-metallic materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If wet process or pyrogenic process is used for solid waste recycling, then specific solid wastes can be converted into cementitious materials or ceramics, but the processes lack scientific composition design mechanism for basic oxide units and result in high impurity content in products
Solution Approach 1:
The patent applies parameter changes by systematically adjusting the composition ratios of basic oxide units (CaO, SiO2, Al2O3, MgO) in solid wastes to achieve target mineral phases. Through calculated composition design and controlled sintering parameters, the method transforms undifferentiated solid waste mixtures into precise inorganic non-metallic materials with specific mineral compositions, resolving the contradiction between ease of manufacture and manufacturing precision.
Solution Approach 2:
The patent employs composite materials by creating inorganic non-metallic materials composed of multiple mineral phases (silicates, aluminates, aluminosilicates, magnesioaluminates) from mixed solid wastes. This composite approach allows the final product to incorporate various basic oxide units in controlled proportions, achieving both manufacturing feasibility and compositional precision simultaneously.
2Productivity
If solid wastes are converted into inorganic non-metallic materials without composition design, then recycling can be simplified, but product performance becomes unstable due to high impurity content
Solution Approach 1:
The patent applies preliminary action by performing composition analysis and calculation before the actual recycling process. The method pre-determines the optimal proportions of different solid wastes needed to achieve target mineral phases, allowing the recycling process to proceed efficiently while ensuring consistent product quality. This preliminary composition design prevents performance instability by eliminating guesswork from the recycling process.
Solution Approach 2:
The patent implements feedback through composition analysis and adjustment mechanisms. By analyzing the basic oxide unit content in input solid wastes and comparing it with target composition requirements, the method provides feedback for adjusting waste mixing ratios and sintering parameters, thereby maintaining product performance stability while preserving recycling efficiency.
3Device complexity
If traditional recycling methods are used, then processing complexity is reduced, but valuable metals in solid wastes are not recovered and environmental pressure remains high
Solution Approach 1:
The patent applies universality by designing a multi-functional recycling process that simultaneously achieves multiple objectives: converting solid wastes into inorganic non-metallic materials, recovering valuable metals through slag formation, and reducing environmental pressure. This universal approach integrates what would traditionally be separate processes into one unified method, maintaining simplicity while eliminating harmful effects.
Solution Approach 2:
The patent converts harm into benefit by transforming the typically problematic slag byproduct into a valuable resource. Instead of discarding slag as waste, the method utilizes it as a reducing agent to recover valuable metals from the solid waste mixture, thereby converting a harmful factor (slag) into a beneficial resource for metal recovery while maintaining overall process simplicity.
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
This method enables the efficient recycling of all inorganic solid wastes into high-value inorganic non-metallic materials, effectively reducing environmental pressure and recovering valuable metals, while also improving product stability and reducing impurities.
Implementation Method 1
using carbon, metallic aluminium, aluminium nitride, aluminium carbide, silicon nitride and silicon carbide in the multi-source solid waste as reducing agents, wherein the slag provides a high-temperature homogeneous reaction environment and serves as a 'solvent' for reactants, the reducing agents reduce valuable metals in the slag to obtain an alloy
Implementation Method 2
melting the raw material into slag, and using carbon, metallic aluminium, aluminium nitride, aluminium carbide, silicon nitride and silicon carbide in the multi-source solid waste as reducing agents, wherein the slag provides a high-temperature homogeneous reaction environment
Data Source
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AI summary
The present invention discloses a multi-source solid waste recycling method based on composition design for calcium-silicon-aluminium-magnesium oxide, and belongs to the field of solid waste recycling. The present invention collects multi-source solid waste composition data; calculates and designs compositions of calcium oxide, silicon oxide, aluminium oxide and magnesium oxide units to obtain an inorganic non-metallic raw material with a target composition; and melts the raw material into slag, and uses carbon, metallic aluminium, aluminium nitride, aluminium carbide, silicon nitride and silicon carbide in the multi-source solid waste as reducing agents, wherein the slag provides a high-temperature homogeneous reaction environment and serves as a "solvent" for reactants, the reducing agents reduce valuable metals in the slag to obtain an alloy, thereby achieving recovery of the valuable metals, and the slag is used for the inorganic non-metallic material in a high-value mode. The present invention achieves the synergistic recycling of the multi-source solid waste on the alloy and the inorganic non-metallic material by pyrometallurgy, and has the advantages of a short flow, a wide application range, strong operability and easy industrialization.