Liquid Polymer Dust Suppression for Mine Tailings Stability
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Solution Overview
Problem
Mine tailings storage facilities (TSFs) face challenges in controlling dust from dried zones due to accessibility and scale issues, leading to instability and environmental contamination, with current methods like water saturation posing risks and miscommunication between departments exacerbating the problem.
Innovation Solution
The use of biocompatible liquid polymers, specifically amphiphilic block copolymers like Pluronic, is applied to mine tailings to enhance wettability and particle bonding, reducing dust generation by mixing with tailings before discharge and spraying on the TSF surface, thereby stabilizing the beach and minimizing water usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If water saturation is used to control dust from dried zones, then dust suppression is improved, but TSF stability deteriorates and water usage increases
Solution Approach 1:
The patent changes the chemical composition parameter by introducing liquid polymers (specifically amphiphilic block copolymers like Pluronic) as an alternative to water saturation. These polymers modify the physical-chemical properties of tailings particles, providing dust suppression through particle bonding and moisture retention without the destabilizing effects of excessive water application. The polymer concentration and molecular weight are optimized to achieve effective dust control while maintaining TSF stability.
Solution Approach 2:
The liquid polymer acts as an intermediary substance between water and tailings particles. Instead of directly saturating tailings with water (which causes stability issues), the polymer mediates the interaction by coating particles and creating bonding bridges, thereby achieving dust suppression through a intermediate mechanism that avoids the harmful effects of water saturation while maintaining structural integrity.
2Object-affected harmful factors
If water saturation is used to control dust, then dust suppression is improved, but water usage increases
Solution Approach 1:
The patent substitutes water with liquid polymer formulations, fundamentally changing the substance parameter. The polymers are applied at optimized concentrations (typically 0.1-5% by weight) to achieve effective dust suppression with minimal water content, thereby reducing overall water consumption while maintaining or improving dust control effectiveness compared to traditional water saturation methods.
3Object-affected harmful factors
If current dust control methods are used, then dust suppression is attempted, but accessibility and scale issues prevent effective control
Solution Approach 1:
The liquid polymer system provides multi-functional dust control that works effectively across diverse TSF conditions and geometries. The polymers can be applied through existing infrastructure (spigotting systems, spray equipment) and provide universal coverage regardless of the specific TSF configuration, beach angle, or accessibility constraints, thereby solving the operational difficulties associated with targeted dust control in hard-to-reach dried zones.
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 liquid polymers effectively suppress dust by maintaining moisture and bonding particles, enhancing TSF stability and reducing maintenance costs while adhering to environmental regulations, with amphiphilic polymers showing superior performance in suppressing PM10 and PM2.5 particulate matter.
Implementation Method 1
The liquid polymer may be applied to a surface area (e.g., road surface, coal mine surface, pot ash surface) to suppress dust or mixed with water and sprayed onto the dust or surface area
Implementation Method 2
The liquid polymer may be applied to a surface area (e.g., road surface, coal mine surface, pot ash surface) to suppress dust or mixed with water and sprayed onto the dust or surface area
Data Source
AI summary
Various embodiments for systems and methods for dust suppression in which a mixture of polymer and water is applied to a surface or mixed with particles that prevents the generation of dust after the water evaporates are disclosed.