Sensorized Mill Liners for Real-Time Wear-Based Replacement
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Solution Overview
Problem
Comminution mills face inefficiencies and high costs due to premature replacement of liners, which are worn down during the ore grinding process, leading to increased downtime and operational expenses.
Innovation Solution
A system with sensors, including RFID tags, ultrasonic, inertial, and acoustic sensors, is integrated into the liners to monitor wear and operation conditions, allowing for real-time data collection and analysis to determine the optimal timing for liner replacement, thereby improving mill efficiency and reducing unnecessary downtime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If liners are replaced frequently to ensure mill safety and integrity, then reliability is improved, but loss of time and productivity deteriorate due to increased downtime
Solution Approach 1:
The sensor system performs preliminary monitoring of liner wear conditions continuously during mill operation. By detecting wear thresholds before they compromise mill safety, the system enables proactive scheduling of re-line operations at optimal moments, preventing both premature replacements and dangerous delays.
Solution Approach 2:
The system establishes a feedback loop where sensors continuously monitor liner depth and wear conditions, transmit data to the control system, and trigger alerts when wear thresholds are approached. This real-time feedback enables mill operators to schedule re-line operations based on actual wear conditions rather than fixed schedules, optimizing both safety and productivity.
2Productivity
If liners are monitored continuously to optimize replacement timing, then productivity is improved by reducing unnecessary downtime, but device complexity increases due to integration of sensors and data systems
Solution Approach 1:
The sensor system is designed to serve multiple functions: monitoring liner wear depth, tracking operational hours, detecting abnormal wear patterns, and providing maintenance scheduling recommendations. By consolidating these functions into a single integrated system, the patent reduces overall device complexity compared to implementing separate systems for each function.
Solution Approach 2:
The sensor system automatically monitors and reports liner wear conditions without requiring manual intervention. The system self-calibrates, self-diagnoses sensor status, and autonomously triggers maintenance alerts, reducing the operational complexity and training requirements for mill personnel.
3Ease of operation
If traditional fixed-schedule re-line operations are used, then ease of operation is maintained through simple scheduling, but loss of substance increases due to premature replacement of partially worn liners
Solution Approach 1:
The system transitions from static, fixed-schedule replacement to dynamic, condition-based replacement timing. Sensors continuously measure actual liner wear and transmit data to optimize replacement scheduling, allowing the system to adapt replacement timing to actual wear rates and operational conditions, thereby maximizing liner utilization.
Solution Approach 2:
The system monitors changes in liner depth, wear rate, and operational parameters to determine optimal replacement timing. By tracking these parameter changes in real-time, the system extends liner service life until actual wear thresholds are reached, preventing premature replacement and reducing material waste.
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 system enables more precise scheduling of liner replacements, minimizing downtime and operational costs by providing real-time data for adjusting mill operations and extending the lifespan of liners, thus enhancing the overall efficiency of comminution mills.
Implementation Method 1
The sensors may include RFID tags, liner wear profile sensors (e.g., such as an ultrasonic sensor)
Implementation Method 2
an acoustic sensor for generating a signal indicative of the number of strikes on the liner assembly from the media and charge
Implementation Method 3
an accelerometer sensor for generating a signal indicative of the intensity of strikes on the liner assembly from the media and charge
Data Source
AI summary
The present invention provides a system and method for more efficient utilization of comminution mills. Sensors are provided in the liners placed within the mill shell. The sensors may include RFID tags, liner wear profile sensors (e.g., such as an ultrasonic sensor), an inertial sensor (preferably included both an inclinometer and an accelerometer, and an acoustic sensor, among others. When the liners are installed in the shell, the RFID tag is used to register the location of the liner within the shell. In operation, the information provided by the sensors is collected by a data transmission unit and sent by transmitter over the air to a computer having an antenna and receiver for such data. The data is correlated and the data is reviewable in real time while the mill is in running.