Nanofiltration Water Management for Ore Mining
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Solution Overview
Problem
The mining industry faces challenges with water scarcity and contamination due to high water usage and brine disposal from desalination processes, particularly in arid regions, which affects mineral extraction and tailings management, leading to environmental concerns and increased costs.
Innovation Solution
Treating saline sources, such as seawater, through nanofiltration to reduce multivalent ions while maintaining high concentrations of monovalent salts, allowing for efficient mineral extraction and tailings consolidation, thereby reducing water consumption and environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If reverse osmosis is used to desalinate seawater for mining extraction operations, then mineral extraction capability is improved, but environmental harm from brine disposal increases
Solution Approach 1:
The patent converts the harmful brine discharge into a beneficial resource by treating the concentrate stream from nanofiltration as a valuable product. The brine, which was previously discarded as environmental pollution, is now utilized for livestock watering and agricultural irrigation, transforming an environmental hazard into a useful resource that supports local communities and ecosystems.
Solution Approach 2:
Instead of discarding the brine concentrate stream from nanofiltration, the patent implements a recovery and reuse system. The concentrate is captured, treated to remove harmful substances, and then recovered for alternative uses such as livestock watering and irrigation, thereby eliminating the need for environmental discharge while maintaining the benefits of water treatment.
2Quantity of substance
If conventional desalination methods are used, then water availability for mining operations is improved, but operational cost increases
Solution Approach 1:
The patent changes the technical parameter from conventional reverse osmosis to nanofiltration, which operates at lower pressures and consumes less energy. This parameter change reduces operational costs while maintaining water availability for mining operations, making the desalination process more economically viable.
Solution Approach 2:
The system incorporates a self-service approach by using the concentrate stream from nanofiltration for alternative purposes such as livestock watering and irrigation. This self-utilization of the concentrate reduces the overall water consumption requirement and lowers operational costs by eliminating the need for additional water intake and brine disposal infrastructure.
3Productivity
If large volumes of water are used for ore processing, then mineral extraction efficiency is improved, but water scarcity problem worsens
Solution Approach 1:
The patent implements comprehensive water recovery by capturing and reusing the concentrate stream from nanofiltration. Instead of discarding this water resource, it is recovered and reused for mining operations, livestock watering, and irrigation, thereby reducing overall water consumption and addressing water scarcity while maintaining extraction efficiency.
Solution Approach 2:
The treated water and concentrate stream serve multiple functions within the mining operation and surrounding communities. The system provides water for mineral extraction, livestock watering, and agricultural irrigation, making the water management system multi-functional and reducing the need for separate water sources, thereby alleviating water scarcity.
4Device complexity
If brine is discharged to the environment, then water treatment requirement is reduced, but contamination of aquifers increases
Solution Approach 1:
The patent converts the potentially harmful brine discharge into a beneficial resource by treating the concentrate stream as a valuable water resource. After removing harmful substances through nanofiltration, the treated water is used for livestock watering and irrigation, eliminating the need for environmental discharge and preventing aquifer contamination while reducing water treatment requirements.
Solution Approach 2:
The nanofiltration system acts as an intermediary between the seawater intake and the final water usage points. It selectively removes harmful substances while allowing beneficial components to pass through, creating a treated water product that can be safely used for mining operations, livestock watering, and irrigation without contaminating aquifers.
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 approach enables higher recycling of process water, lowers brine disposal, improves metal recoveries, and reduces the size of tailings ponds, enhancing both economic and environmental sustainability in mineral processing operations.
Implementation Method 1
treating a saline source by nanofiltration to reduce a concentration of one or more multivalent ions dissolved in the saline source
Implementation Method 2
froth flotation is used to separate valuable minerals in ore from components with no commercial value (gangue)
Data Source
AI summary
Processes of extracting mineral deposits in ore include treating a saline source, e.g., seawater, to reduce a concentration of one or more multivalent ions (e.g., Ca2+, Mg2+, SO42−) dissolved in the saline source by passing the seawater through one or more nanofilters to produce treated saline water while maintain a certain concentration of dissolved monovalent ions (e.g., (Na+, K+ and Cl−) in the treated saline water. The treated saline water can be used in an operation to extract minerals from ore such as in a flotation operation to extract minerals from ore, or to consolidate tailings generated from an extraction of minerals from ore, or both.