Integrated Grinding Device Inside Flotation Cell
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Solution Overview
Problem
The mineral processing industry faces challenges in achieving efficient simultaneous milling and flotation, as current multi-stage processes are capital and operating expense intensive, and struggle to maintain a narrow feed particle size distribution, which affects metallurgical performance.
Innovation Solution
A grinding device with three zones - collection, grinding, and pumping - is designed to operate within a flotation cell, allowing continuous milling and flotation, with adjustable orientation and real-time configuration to optimize performance, reducing the need for multiple stages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multi-stage milling and flotation process is implemented, then metallurgical performance is improved, but plant size and process CAPEX increase
Solution Approach 1:
The patent combines milling and flotation operations into a single integrated device, where the grinding chamber is positioned inside the flotation cell. This allows simultaneous size reduction and mineral separation in one unit, eliminating the need for separate multi-stage milling and flotation equipment, thereby reducing plant size and CAPEX while maintaining metallurgical performance
Solution Approach 2:
The integrated device performs multiple functions within a single system: the grinding chamber conducts size reduction while the flotation cell simultaneously performs mineral separation. This multi-functional approach replaces what traditionally required separate dedicated equipment for each process stage, reducing overall plant complexity
2Reliability
If multi-stage milling and flotation process is implemented, then metallurgical performance is improved, but process OPEX increases
Solution Approach 1:
By merging milling and flotation into one continuous process within a single device, the patent eliminates intermediate material handling, transfer, and processing steps that would incur operational expenses. The integrated system processes material continuously from raw ore to separated concentrate in one operation, reducing OPEX compared to multi-stage processes
3Reliability
If ore is reduced to fine particle size distribution, then flotation performance is improved, but liberated particles are re-milled to finer size with lower recovery
Solution Approach 1:
The integrated device enables continuous flotation action during and immediately after milling. As particles are being ground in the grinding chamber, flotation occurs simultaneously in the adjacent flotation cell, allowing liberated particles to be continuously removed from the process stream before they can be subjected to further size reduction that would reduce their recovery
Solution Approach 2:
The system performs preliminary flotation separation right at the point of particle liberation during milling. By positioning the flotation cell to receive material directly from the grinding chamber, the system captures liberated particles immediately, preventing them from undergoing additional size reduction that would make recovery more difficult
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 solution enhances ore particle recovery and flotation performance while minimizing capital and operating expenses by integrating milling and flotation in a single process, improving liberation and bubble circulation without increasing plant size.
Implementation Method 1
a grinding zone in which particles undergo a size reduction process
Implementation Method 2
a grinding zone in which particles undergo a size reduction process
Implementation Method 3
a collecting zone in which particles are collected through a settling process
Implementation Method 4
The flotation process is conducted by using the differences in the ability of air bubbles to selectively adhere to surfaces of specific minerals in a slurry
Implementation Method 5
a pumping zone from which milled particles are recycled to the flotation cell
Data Source
AI summary
A grinding device suitable for operating inside a flotation cell which includes three zones including a collecting zone in which particles are collected though a settling process, a grinding zone in which particles undergo a size reduction process and a pumping zone from which milled particles are recycled to the flotation cell.