Strategies for Maximizing Operational Efficiency and Equipment Upkeep: Inspection and Maintenance Protocols
- Three-Tier Maintenance System
- Daily Routine: Performed by operators during each shift handover. Focus: “Cleaning, Lubrication, and Fastening.” Check crusher main shaft bearing temperature, belt tension, and any abnormal vibration or noise. Timely add grease and lubricating oil; inspections must be conducted before each shift with scheduled and quantified refills.
- Scheduled Inspection: Performed weekly or monthly by technicians. Focus: Inspect wear levels of wear parts (e.g., jaw plates, hammers, screens). Implement a periodic management system with fixed inspections scheduled at monthly intervals, coordinating with daily routines for double protection.
- Holistic Inspection and Maintenance: Mandatory based on equipment operating hours (e.g., 5,000 hours). Replace core transmission components or perform structural reinforcement to prevent “running with defects” leading to total destruction. Conduct holistic checks and repairs timely for wear parts and unstable equipment conditions under long-term high-intensity operation.
- Targeted Maintenance of Core Components
Crusher
- Key Focus: Lubrication and Clearance Adjustment
Ensure lubrication lines are unobstructed. For hydraulic crushers, regularly test hydraulic oil cleanliness to prevent dust from entering precision valve groups. Ensure tight connection and pre-fastening of all parts to avoid resonance and mechanical displacement. Monitor vibration parameters and perform real-time temperature sensing on rotating parts under high-temperature conditions to avoid exceeding the lubricant’s melting point, preventing over-temperature lubrication and reduction of the lubrication coefficient.
Vibrating Screen - Key Focus: Screen Mesh and Exciter
The screen mesh is a consumable; check for holes leading to material leakage. Exciter bearings require high-temperature grease and regular oiling. Due to high vibration force and the first-stage screen plate bearing gravity loads, timely check the flatness and wear of impact plates and bottom support plates, mesh welding integrity, and the fastening/integrity of bottom vibration springs. Check exciter connector integrity and lubrication. Perform acoustic diagnostics on bearing wear during no-load runs and temperature checks after shutdown.
Conveyor - Key Focus: Belt Tracking and Pulleys
Check for belt misalignment to prevent edge wear. Regularly clean material buildup on pulleys to avoid belt slippage. Check the fit and rotation of bottom idlers; replace seized rollers promptly. Inspect belt joints for missing rivets and repair timely to avoid large-scale downtime. Check the tightness of the conveyor’s bottom foundation bolts.
Feeder - Key Focus: Bolt Fastening
Due to heavy ore impact, regularly inspect base and liner bolts to prevent structural tearing caused by loosening.
- Smart Maintenance (Digitalization)
In modern plants, manual inspection is insufficient. Maintenance can be integrated through:
- Vibration Monitoring: Install sensors at critical bearing positions; trigger automatic alarms for abnormal frequencies to intervene before bearing seizure.
- Oil Analysis: Periodically sample and test lubrication oil. Finding significant metal debris indicates severe internal component wear.
- Digital Health Records: Establish a “health file” for each machine. Use operational data to predict the optimal timing for replacing hammers or jaw plates.
- Maintenance Safety Principles: Lockout/Tagout (LOTO)
Strict energy isolation must be enforced during any maintenance:
- Shutdown and Power-off: Ensure the main power supply is off. Hang “Power Off” signs and safety slogans on-site reminding that closing the switch is prohibited.
- Lockout/Tagout: Maintenance personnel hold unique keys to prevent accidental startup by others. Implement on-site prevention with localized measures and a safety supervisor mechanism to avoid electrical shock and rotation hazards.
- Residual Energy Release: Relieve hydraulic system pressure or wait for flywheels to stop rotating completely. Fully release kinetic energy and pressure to avoid sudden rotation of elastic or rotating parts causing injury.
- Spare Parts Management
Critical Spares must be in stock due to heavy weight and long logistics cycles.
- High-frequency wear parts: Hammers, liners, screen meshes, belt buckles, idlers.
- Critical long-life parts: Bearings, motors, gearboxes (at least one set should be available to prevent total line paralysis from core drive failure). Purchase long-term spares in advance to ensure timely repair and rectification upon discovery of defects; call items from the warehouse immediately to reduce wait times and improve efficiency.