Cold Fusion Concrete from Mining Waste
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Solution Overview
Problem
Mining operations generate large amounts of hazardous waste that require permanent storage, and existing methods do not effectively utilize or neutralize these waste products.
Innovation Solution
A process for preparing cold fusion concrete and cement using mining waste, which involves combining mining waste with alkali metasilicate, reducing agents, and other materials to form a pourable consistency, and optionally pre-treating with a dissociating agent and carbon dioxide source to form metal carbonates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If mining waste is stored in impoundments, then hazardous materials are contained, but land use is consumed and environmental harm persists
Solution Approach 1:
The patent converts hazardous mining waste containing metal oxides, hydroxides, and carbonates into beneficial construction materials (cold fusion concrete and cement). The harmful waste materials are chemically reacted with alkali metasilicate and reducing agents to form stable, useful building products, thereby eliminating the need for land-based impoundments while simultaneously removing hazardous substances from the environment.
Solution Approach 2:
Instead of discarding mining waste in impoundments, the patent recovers valuable materials from the waste stream. The metal oxides, hydroxides, and carbonates are extracted and transformed into construction materials, turning a waste disposal problem into a resource recovery opportunity that reduces both land use and environmental harm.
2Reliability
If mining waste is stored permanently, then hazardous materials are isolated, but resource utilization is lost
Solution Approach 1:
The patent transforms the isolated hazardous waste materials into beneficial construction resources. By reacting the waste with alkali metasilicate and reducing agents, the hazardous metal oxides, hydroxides, and carbonates are converted into stable construction materials, thereby achieving both reliable waste stabilization and valuable resource utilization simultaneously.
Solution Approach 2:
The patent changes the chemical parameters of the mining waste through controlled reactions. By adjusting pH, oxidation state, and chemical composition through the addition of alkali metasilicate and reducing agents, the waste materials are transformed from hazardous isolated substances into useful construction materials with desired physical and chemical properties.
3Strength
If traditional concrete materials are used, then construction performance is achieved, but hazardous mining waste accumulates
Solution Approach 1:
The patent creates composite construction materials by combining mining waste with alkali metasilicate, reducing agents, and other additives. This composite approach maintains or enhances concrete strength and performance while incorporating hazardous waste materials into the final product, thereby reducing waste accumulation by up to 70% of the concrete composition.
Solution Approach 2:
Instead of discarding mining waste, the patent recovers and utilizes it as a primary ingredient in concrete production. The waste materials are processed and integrated into the concrete matrix, replacing traditional aggregates or cementitious materials, thereby achieving both construction performance and waste reduction goals.
4Loss of substance
If mining waste is processed into concrete, then waste utilization improves, but process complexity increases
Solution Approach 1:
The patent applies preliminary chemical treatments to the mining waste before concrete formulation. By pre-reacting the waste with alkali metasilicate and reducing agents to stabilize hazardous components and activate binding properties, the subsequent concrete mixing and curing processes become more straightforward, thereby managing overall process complexity while achieving effective waste utilization.
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 converts potentially hazardous mining waste into a useful material for concrete and cement, while also performing carbon sequestration by converting carbon dioxide into metal carbonates, thereby addressing waste management and environmental concerns.
Implementation Method 1
combining: (a) from 20 to 70% by weight of mining waste; (b) from 5 to 30% by weight of an alkali metasilicate or alkali metasilicate pentahydrate
Implementation Method 2
adding 0.2 to 15% by weight of a carbon dioxide source to form metal carbonates
Implementation Method 3
the dissociating agent is an acid selected from the group consisting of oxalic acid, hydrochloric acid, carbonic acid, nitric acid, phosphoric acid, acetic acid
Data Source
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AI summary
Methods of preparing cold fusion concrete and cement using mining waste are described.