I. General Provisions

1. These specifications apply to the operation and management of belt feeding equipment in fertilizer production workshops, covering the entire process of pre-production preparation, production operation, and maintenance.
2. Operators must pass training before taking up their posts. Before operation, they shall become familiar with the equipment structure and the contents of these specifications. Drinking alcohol within eight hours before the shift and during the shift is strictly prohibited. Labor protection articles must be worn as required.
3. The belt feeder continuously conveys material from the silo to downstream equipment uniformly and quantitatively through the continuous operation of the belt. A feeder with a batching function can simultaneously achieve precise proportioning and conveying of multiple raw materials.

II. Pre-Production Preparation Stage

2.1 Pre-Startup Inspection

1. Equipment integrity inspection: Check whether all parts are installed securely and whether fasteners are loose or fallen off. Check the belt for abnormalities such as fuzzing, cracking, and joint damage. Remove debris and accumulated material from the belt and scale body area (especially near the weighing idlers and sensors). Before restarting equipment that has been out of service for a long time (over 30 days), test the motor insulation with a megohmmeter.
2. Belt tension inspection: Check whether the belt tension is appropriate. Too loose easily causes slipping and deviation; too tight aggravates wear and increases motor load. Adjust to an appropriate level before startup.
3. Idler and pulley inspection: Check whether all idlers rotate flexibly, have no adhered material, and are not damaged (such as bearing seizure or deformation). Check whether the drive pulley and bend pulley surfaces are clean and check the wear condition of rubber lagging (if any).
4. Cleaner inspection: Check the contact between the belt cleaner and the belt. If severely worn, adjust or replace it in time.
5. Lubrication system inspection: Check the lubrication condition of each bearing housing and reducer. Add sufficient lubricating oil to each lubrication point as specified. Check the oil quality and oil quantity of the electric drum (if applicable).
6. Electrical inspection: Power connections should be firm and reliable, insulation should be good, and grounding should be correct. It is strictly prohibited to operate electrical equipment with wet hands.
7. Weighing system inspection (batching type): Check whether the appearance of the load cell and speed sensor is intact, and whether the connecting cables are damaged, pulled, or loose. There should be no external force pressure or impact marks near the sensors. Check whether terminals are tight, free of looseness and corrosion.

2.2 Material Preparation

1. Confirm that the material to be conveyed contains no hard foreign matter such as iron blocks, stones, or broken packaging, so as to avoid scratching the belt or damaging the equipment.
2. Check whether the material particle size meets process requirements.
3. Be careful when removing foreign matter from the material to prevent clothing from being caught in the belt.

III. During Production Operation

3.1 Startup Sequence

1. This machine must be started under no-load conditions. Startup with material is strictly prohibited. Feeding first and then starting is prohibited.
2. When several feeders operate in series, start from the discharge end and start in sequence. Feed material only after all are running normally.
3. After the equipment runs smoothly, start feeding (such as opening the silo gate) to begin feeding material.
4. Before formal feeding of a batching-type feeder, let the belt run without load for a period of time (until it reaches a stable normal operating speed), and perform a “zero calibration” or “belt tare calibration” to eliminate system errors caused by belt self-weight and adhered material.

3.2 Operation Monitoring

1. Belt status monitoring:
   • Continuously observe whether the belt deviates, slips, or vibrates abnormally. When belt deviation occurs, stop and adjust. Do not force operation, so as to avoid edge wear and increased load.
   • Check the belt for damage, delamination, or breakage. Stop immediately if any problem is found.
2. Temperature monitoring: During operation, pay attention to the surface temperature of the motor and reducer. The motor housing temperature must not exceed 70°C, and the reducer bearing temperature must not exceed 80°C. If exceeded, stop immediately and inspect.
3. Sound and vibration monitoring: Frequently use a listening rod to listen to the internal sound of the motor and reducer, and check for abnormal noise and abnormal vibration. Stop immediately if any abnormality is found.
4. Material flow monitoring:
   • Observe whether the discharge outlet is blocked and whether feeding is uniform. Ensure that material is uniformly distributed on the belt to avoid severe offset load or material impact.
   • Check whether inlet and outlet are unobstructed and whether anything is jammed by foreign matter.
   • Check whether material adheres to the belt or pulleys and whether idlers accumulate material. Clean promptly.
5. Weighing system monitoring (batching type): Observe whether the weighing display readings are normal and whether there is abnormal fluctuation. Check field instrument indications and calibrate with central control.
6. Safety discipline: During operation, it is strictly prohibited for anyone to pass through, step over, sit, lie on, or crawl under the belt. It is not allowed to use the belt to transport other items. It is not allowed to use sticks, shovels, etc. to remove debris from running belts or pulleys. Guards for transmission parts must always remain installed.

3.3 Shutdown Operation

1. Normal shutdown:
   • Stop feeding first (close the silo gate) and stop feeding material to the belt feeder.
   • Let the belt continue running until all material on the belt is discharged, then stop.
   • Turn off the feeder main power, cut off the main power of the control cabinet, set the control mode of the control box to “0,” and hang a “Stopped / Do Not Operate” warning sign.
2. Emergency shutdown (abnormal shutdown):
   • Immediately press the emergency stop button or cut off power to perform emergency shutdown.
   • Handling after emergency shutdown: The cause of the fault must be identified and eliminated before restarting according to the startup sequence. It is strictly prohibited to force startup before the fault is eliminated. At the same time, the emergency shutdown time, cause, and handling process should be recorded in detail in the Equipment Operation Record.
3. Post-shutdown on-site handling (mandatory):
   • Clean adhered material on the belt, idlers, and pulleys.
   • Clean the surrounding environment of the equipment and keep the site tidy.
   • Check the wear condition of the belt, idlers, cleaner, etc., and prepare for maintenance or replacement if necessary.
4. Shift-change shutdown requirements:
   • Before handover, the equipment must be stopped and cleaned, and the Equipment Operation Record and Shift Handover Record must be truthfully filled in, noting the equipment operation status during the shift (key parameters such as belt deviation, temperature, and batching accuracy), abnormalities, and countermeasures.
   • Before startup, incoming shift personnel must re-confirm the equipment status against the inspection requirements in the “Pre-Production Preparation Stage.”

IV. Maintenance and Care

4.1 Daily Maintenance (Each Shift)

1. Cleaning: Remove dust, adhered material, and debris from the scale body frame, belt surface, weighing idlers and near sensors, and speed measuring wheel (must be done after shutdown and power disconnection).
2. Belt inspection: Check whether the belt deviates, is damaged (tearing, edge wear, joint cracking), or is excessively slack.
3. Idler inspection: Visually inspect whether idlers rotate flexibly, have no adhered material, and are not damaged.
4. Component inspection: Check whether the discharge outlet is blocked and whether bolts are loose.
5. Inspection record: Record operating temperature, belt status, cumulative total, etc.

Regular Maintenance

1. Lubrication maintenance cycle:
   • Regularly lubricate support rollers, thrust rollers, and transmission gears.
   • The injected lubricating oil must be clean, and seals must be good.
   • Note: For detailed lubrication guidance, see the equipment lubrication nameplate.
2. Belt tension and deviation correction:
   • Regularly check and adjust belt tension to the specified range.
   • Check and adjust self-aligning idlers, head and tail pulley positions, or the tensioning device to ensure the belt runs centered in the weighing area.
3. Idler and pulley maintenance:
   • Manually rotate idlers in and near the weighing area and check whether rotation is flexible and noise-free. Replace idlers that rotate poorly, are damaged, or have abnormal noise.
   • Check the rubber lagging wear of the drive pulley and bend pulley, and remove adhered material.
4. Cleaner maintenance: Check the wear condition of the cleaner and adjust the contact between the cleaner and the belt.
5. Electrical system: Check motor insulation performance every six months; inspect circuits to eliminate leakage and short-circuit hazards.

4.3 Long-Term Shutdown Maintenance

When the equipment is out of service for more than 30 days, thoroughly clean the belt and frame, and apply anti-rust grease to exposed rotating parts. If installed outdoors, cover the motor with a rain cover. Before restarting, test the motor insulation with a megohmmeter, trial run according to the no-load trial run requirements, and re-perform zero calibration (batching type). Feed production only after confirming normal operation.

4.4 Fault Handling Principles

1. If belt deviation, slipping, abnormal noise, excessive bearing temperature, etc. are found, stop immediately; restart only after the cause is identified and the fault is eliminated.
2. It is strictly prohibited to run equipment with faults, and strictly prohibited to perform maintenance or cleaning while the equipment is running.
3. When repairing transmission parts or replacing idlers and cleaners, cut off power, hang a “Do Not Close Switch” warning sign, and set the manual/automatic control selector switch to the zero position.

V. Common Faults and Remedies