Dust Scatter Preventing Agent for Tailings Stability
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Solution Overview
Problem
Conventional dust scatter preventing agents for tailings accumulation sites fail to provide long-term dust prevention and stability against environmental factors, leading to layer separation and collapse of slag heaps.
Innovation Solution
A dust scatter preventing agent comprising a hydrophilic polymer with a contact angle of 45 to 78 degrees and insoluble fibers with specific length and fineness ranges, forming a nonwoven coating layer that integrates with newly accumulated material, enhancing strength and water resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional coating agent comprising resin and aqueous emulsion is spread over the tailings surface, then the coating agent can be applied easily, but the coating agent flows away when it rains before hardening
Solution Approach 1:
The patent changes the chemical composition parameters of the coating agent by incorporating water-soluble polymers (carboxymethyl cellulose, starch, or dextrin) as binding agents instead of conventional resin-based aqueous emulsions. This parameter change allows the coating to maintain stability during rain while remaining easy to apply, resolving the contradiction between ease of operation and coating reliability
2Reliability
If a coating agent comprising highly polymerized compound with imide bonding or polyethyleneimine aqueous solution and water-soluble dialdehyde is used, then the coating agent forms a gel soon after coating and prevents flowing during rain, but the coating layer has low strength and insufficient water resistance
Solution Approach 1:
The patent creates a composite coating system by combining water-soluble polymers (carboxymethyl cellulose, starch, or dextrin) with inorganic materials (cement, lime, or fly ash). This composite approach allows the coating to achieve both immediate gel formation for rain stability and sufficient long-term strength and water resistance through the inorganic components, resolving the contradiction between reliability and strength
3Strength
If a coating agent comprising emulsion with ionic structure and resin emulsion with opposite ionic structure is used, then the coating layer has excellent strength and water resistance, but it is difficult to maintain the coating layer over a long period and layer separation occurs
Solution Approach 1:
The patent changes the chemical composition from ionic emulsion systems to non-ionic water-soluble polymer systems (carboxymethyl cellulose, starch, or dextrin) combined with inorganic materials. This parameter change eliminates the electrostatic interactions that cause layer separation while maintaining strength and water resistance properties, thereby extending the coating maintenance period
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 solution effectively prevents dust scattering and layer separation, maintaining environmental stability by improving the strength and water resistance of the coating layer, thus preventing environmental damage from tailings accumulation.
Implementation Method 1
a dust scatter preventing agent which comprises an aqueous solution or aqueous dispersion that includes a hydrophilic polymer that has a property of being solidified
Implementation Method 2
forming a coating layer that integrates with newly accumulated material, enhancing strength
Implementation Method 3
improving the strength and water resistance of the coating layer
Data Source
AI summary
Provided is a dust scatter preventing agent capable of preventing scattering of dust for a long period of time, by improving the strength of a coating layer formed on a surface of a tailing at a tailing accumulation site. A dust scatter preventing agent comprising an aqueous solution or aqueous dispersion that includes a hydrophilic polymer such as polyvinyl alcohol or a synthetic resin emulsion that has a property of being solidified and that has a contact angle with water of 45 degrees to 78 degrees, and an insoluble fiber material such as vinylon that has a cut length that is within a range of 0.5 mm to 30 mm, and a fineness that is within a range of 0.1 dtex to 20 dtex, with an amount of the insoluble fiber material with respect to the hydrophilic polymer being 0.1 to 1 by mass ratio, is spread over a surface of an object that includes fine particles having a particle size of 100 μm or less and hardened to form a coating layer on the surface of the object.