Flotation Cell Sand Gate Mechanism for Continuous Removal
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Solution Overview
Problem
Conventional froth flotation cells face issues with sand accumulation at the bottom of the tank, leading to reduced effective fluid volume and interference with slurry introduction, necessitating regular maintenance and resulting in production losses.
Innovation Solution
A froth flotation cell design with a slurry outlet conduit extending along the tank height, allowing selective communication between the lower and upper zones, featuring a sand gate mechanism that automatically opens and closes based on level detection signals to prevent sand buildup and facilitate its removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional flotation cells operate continuously, then productivity is maintained, but sand accumulates in the bottom of the tank reducing effective fluid volume and interfering with slurry introduction
Solution Approach 1:
The flotation cell performs sand removal automatically during normal operation without requiring external intervention or stopping production. The sand gate mechanism self-regulates sand discharge based on sand level detection, enabling the system to service itself while maintaining continuous productivity.
Solution Approach 2:
The sand removal mechanism operates continuously or periodically during normal flotation operations, ensuring sand is constantly prevented from accumulating to harmful levels. This maintains the effective fluid volume and slurry flow conditions throughout the operational cycle without interruption.
2Reliability
If sand is removed regularly to maintain effective fluid volume, then reliability is improved, but downtime increases resulting in production losses
Solution Approach 1:
The automatic sand gate mechanism continuously manages sand removal without requiring manual intervention or production shutdowns. The system self-regulates sand discharge based on detected sand levels, eliminating the need for scheduled maintenance downtime and associated production losses.
Solution Approach 2:
Sand removal is integrated into the continuous operational cycle, allowing the flotation cell to maintain optimal effective fluid volume without interruption. The automatic mechanism ensures sand is removed progressively rather than through periodic shutdowns, maintaining continuous productivity.
3Device complexity
If sand accumulation is allowed to proceed, then device complexity is reduced, but slurry introduction is interfered with and operational reliability decreases
Solution Approach 1:
The sand gate mechanism extracts and removes sand from the bottom of the tank before it can accumulate to interfere with slurry introduction. By actively extracting the harmful sand component, the system maintains reliable slurry flow conditions without requiring complex structural modifications to the tank itself.
Solution Approach 2:
The sand gate acts as an intermediary mechanism between the slurry introduction system and the accumulated sand. It mediates by selectively discharging sand while allowing slurry to pass freely, protecting the slurry introduction system from sand interference without requiring direct structural changes.
4Reliability
If an automatic sand removal mechanism is implemented, then reliability is improved by preventing sand buildup, but device complexity increases
Solution Approach 1:
The slurry outlet conduit is designed to serve multiple functions: it acts as both the normal slurry discharge pathway and the sand discharge pathway when the sand gate is open. This multi-functionality eliminates the need for separate dedicated sand removal infrastructure, reducing overall device complexity while maintaining reliable sand level control.
Solution Approach 2:
The sand removal function is merged with the existing slurry outlet conduit system rather than requiring a completely separate mechanism. By combining sand discharge and slurry discharge through the same conduit structure, the system achieves reliable sand control with minimal additional complexity.
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 reduces sand accumulation, minimizing maintenance downtime and maintaining optimal slurry levels by automatically regulating sand flow, thus enhancing operational efficiency and reducing production losses.
Implementation Method 1
a slurry outlet conduit extending from the operatively upper zone of the tank... in order for slurry located in the operatively upper zone of the tank in use to be displaceable from the tank via the slurry outlet conduit
Implementation Method 2
A rotor, which is driven by an electric motor, agitates the slurry in the tank and draws it upwards through a draft tube
Implementation Method 3
Separation of the slurry occurs by introducing air bubbles into the slurry so as to generate a froth that rises to the surface and which is then removed from the cell by overflowing into a launder
Data Source
AI summary
THIS invention relates to froth flotation, and more specifically to a froth flotation cell and an internal sand removal arrangement for the froth flotation cell. The froth flotation cell included a tank having an operatively lower zone, an intermediate zone and an operatively upper zone, and a central dispersing chamber disposed in the intermediate zone of the tank. A slurry inlet is located in the operatively lower zone of the tank, and a slurry outlet conduit extends from the operatively upper zone of the tank towards a slurry outlet. The froth flotation cell is characterised in that the operatively lower zone is also selectively in flow communication with the slurry outlet of the tank, in order for slurry located in the operatively lower zone of the tank selectively to be displaceable into the slurry outlet.