Gold Separation Pan With Baffle Plate Pocket
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Solution Overview
Problem
Existing gold mining pans are limited in their ability to achieve a 95% capture rate of gold and other desired materials, leading to significant losses and mercury pollution, as they disturb settled values during separation, resulting in inefficient gold retention and high mercury usage.
Innovation Solution
A novel pan design featuring a watertight bottom wall and sidewall with a baffle plate that forms a pocket for undisturbed separation and retention of granular materials, eliminating the need for riffles and decanting, allowing for high capture rates without mercury amalgam, and enabling rapid gangue removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional panning methods are used to separate granular materials, then the separation process can be performed, but the settled values are disturbed and fine particles are remixing with tailings, resulting in low capture rate (86% at best)
Solution Approach 1:
The pan is divided into distinct functional zones using a baffle plate: a concentrate pocket where values settle undisturbed, a separation zone for active processing, and a tailings discharge area. This segmentation allows different stages of separation to occur simultaneously in different regions, preventing disturbance of settled materials while maintaining high capture rates.
Solution Approach 2:
The baffle plate acts as an intermediary structure that creates a physical barrier between the concentrate pocket and the active separation zone. It allows water and fine tailings to pass through while protecting the settled values in the pocket from being disturbed by turbulent processing in the separation zone.
2Productivity
If turbulent processing is used to remove tailings, then tailings can be ejected from the pan, but the values are shifted from their collection point and must be re-stratified, causing additional losses
Solution Approach 1:
The pan structure segments the processing area from the collection area using a baffle plate. Tailings removal occurs in the separation zone through controlled turbulent processing, while the concentrate pocket remains isolated and undisturbed. This allows continuous tailings ejection without shifting settled values.
Solution Approach 2:
The baffle plate creates a three-dimensional arrangement where the concentrate pocket is positioned in a protected recessed area, while tailings removal occurs in the open upper zone. This spatial dimensioning allows simultaneous operation of tailings ejection and value retention without interference.
3Reliability
If riffles are used in the pan, then separation can be enhanced, but the stratification of placer is disturbed and device complexity increases
Solution Approach 1:
The invention removes the traditional riffle structure from the pan design. Instead of using raised riffles to enhance separation, the design relies on the baffle plate to create a protected pocket and uses water flow dynamics to achieve separation, thereby reducing device complexity while maintaining effectiveness.
Solution Approach 2:
The mechanical riffle structure is replaced with a hydraulic solution using the baffle plate and water flow. The separation function previously achieved by mechanical riffles is now accomplished through fluid dynamics and the geometric configuration created by the baffle plate.
4Productivity
If decanting is performed during processing to remove water, then gangue can be separated, but processing time increases and capture rate decreases
Solution Approach 1:
The baffle plate enables continuous processing without interruption for decanting. Water can continuously flow through the separation zone and into the concentrate pocket, allowing gangue separation to proceed continuously while maintaining high capture rates, eliminating the need for periodic decanting operations.
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 pan achieves greater than 90% capture rate of gold and other desired materials, reducing losses and mercury usage, while complying with Minamata Convention guidelines for mercury pollution mitigation, and providing a cost-effective solution for artisanal miners.
Implementation Method 1
separating granular material from wet mixtures, such as slurries, via wet gravity separation
Implementation Method 2
the values are shifted from their collection point by this turbulent processing and will have to be periodically re-stratified
Implementation Method 3
separating granular material from dry mixtures, such as dry sediments, via dry gravity separation
Data Source
AI summary
A pan for separating granular material may include a bottom wall and a sidewall. The sidewall may have an upper perimeter and a lower perimeter, and the lower perimeter may be coupled to the bottom wall so that the bottom wall and sidewall are watertight or otherwise configured to hold a volume of water. Preferably, the upper perimeter may be larger in dimension than the lower perimeter. A baffle plate may be coupled to the sidewall so that the baffle plate may be positioned between the upper perimeter and the lower perimeter. The baffle plate may have a proximal surface and an opposing distal surface, and portions of the proximal surface may contact the sidewall. A pocket may be formed between the bottom wall, the first baffle plate, and a portion of the sidewall that is between the bottom wall and sidewall.