Acoustic Particle Size Tracking for Hydrocyclone Control
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Solution Overview
Problem
Existing mineral processing plants face challenges in optimizing grind product size for improved metallurgical performance due to limitations in real-time particle size measurement technologies, leading to inefficiencies and increased costs.
Innovation Solution
The implementation of real-time, on-line particle size measurement technology, such as the Particle Size Tracking (PST) system, which uses acoustic impact-based sensors to continuously monitor particle sizes in hydrocyclone overflow streams, providing reliable data for automatic control systems to adjust grinding mill operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional near-line particle size measurement instrumentation is used, then particle size data can be obtained, but the availability and measurement frequency are inadequate for reliable automatic control
Solution Approach 1:
The patent replaces traditional mechanical sampling systems with an acoustic measurement system. The PST technology uses acoustic sensors to detect particle size directly in the hydrocyclone overflow stream without requiring mechanical sample collection and handling, thereby eliminating the availability problems associated with mechanical sampling systems while providing continuous high-frequency measurements.
Solution Approach 2:
The patent introduces acoustic waves as an intermediary to measure particle size. Instead of directly mechanically sampling the slurry, acoustic sensors detect particle characteristics through sound wave interactions with particles in the overflow stream, enabling non-intrusive continuous measurement that improves both availability and frequency.
2Manufacturing precision
If real-time on-line particle size measurement is implemented, then process control precision is improved, but system complexity increases
Solution Approach 1:
The patent extracts only the essential measurement function from complex traditional systems. By using acoustic sensors that attach directly to the hydrocyclone overflow pipe, the system eliminates the need for complex mechanical sampling equipment, sample handling systems, and laboratory analysis infrastructure, thereby reducing overall system complexity while maintaining high measurement precision.
Solution Approach 2:
The measurement system is designed to be self-contained and self-powered. The acoustic sensors operate directly in the overflow stream using the existing hydrocyclone infrastructure, requiring no external sample collection, preparation, or analysis systems. This self-service approach simplifies the overall system while enabling precise real-time control.
3Productivity
If automatic grinding control using PST technology is implemented, then throughput and net metal production increase, but operational costs increase
Solution Approach 1:
The patent implements a closed-loop feedback control system where acoustic particle size measurements continuously monitor the grind product size, and this information automatically adjusts grinding mill operations. This feedback mechanism optimizes energy consumption by preventing both over-grinding (wasted energy) and under-grinding (reduced productivity), thereby increasing throughput while controlling operational costs through efficient energy use.
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 process stability and performance by enabling precise control of grind product size, increasing throughput and net metal production, while reducing process variability and operational costs.
Implementation Method 1
an acoustic impact-based particle size measurement device arranged on the overflow piping of at least one hydrocyclone forming part of the mineral extraction system and configured to sense particles flowing in a process medium, and provide signaling containing information about the size of the particles in the process medium
Data Source
AI summary
A mineral extraction system features at least one hydrocyclone, each having input piping, underflow piping, a cyclone portion and overflow piping; a particle size measurement device arranged on some part of the at least one hydrocyclone and configured to sense particles flowing in a process medium, and providing signaling containing information about the size of the particles in the process medium; and a controller having a signal processor configured to receive the signaling, and determine control signaling to control some part of the mineral extraction system, based upon the signaling received.