Precautions for operating a composite crusher

Preface: Composite crusher, also known as vertical composite crusher or gyratory crusher, is a widely used crushing equipment in environmental protection, mining, metallurgy, building materials, chemical industry and other fields. Its main working principle is to use the rotational motion of the crushing cone in the cone cavity inside the shell to compress, split, and bend the material, thereby achieving the purpose of crushing. 

The operation precautions of the composite crusher cover multiple aspects, including the following detailed precautions:

A. Installation method of composite crusher

1. The equipment should be installed horizontally on a concrete foundation and fixed with anchor rods.

2. Attention should be paid to the host body and vertical/horizontal orientation during installation.

3. After installing some bolts, check for looseness and strengthen the host country's warehouse door to ensure it is tightened as required.

4. Configure the power cord and power control switch according to the device configuration.

5. After inspection, the empty load test, experiment, and production can be normal.

B. Pre operation inspection

1. Equipment status: Ensure that there is no abnormal knocking sound inside the crusher, and that the lower part of the crushing cone is not blocked by ore, to prevent the ore from lifting the crushing cone and causing the ore powder to enter the eccentric shaft sleeve and cause accidents.

2. Lubrication system: Check whether there is sufficient lubricating oil in the oil tank, whether the oil quality meets the requirements, and whether the oil filter device is clean. Start the oil pump and check if there is any oil leakage in the pump and pipeline, and if the oil pressure is between 0.81.5kg/cm ² (or 0.080.15MPa).

3. Transmission system: Check the tightness of the V-belt, use the thumb to press down on the V-belt to measure the tension, and the appropriate pressure should not exceed 1.5 centimeters (the measurement must be done before driving or after parking), and check for any breakage. At the same time, check whether the screws, pulleys, and keys of each part of the transmission shaft are loose.

4. Connectors: Check whether the connecting pins between the crossbeam, middle frame, and machine base are loose, whether the gap of 15 millimeters along the circumference is equal, and whether the anchor screws of each part of the machine body and the interface screws of the middle frame of the machine base are loose.

5. Lining plate status: Check whether the lining plates of each part are loose, missing, or severely worn.

6. Discharge port size: Check if the discharge port size meets production requirements and adjust it to the appropriate position.

7. Electrical system: Check whether the handwheel of the oil immersed variable resistor in the electrical part is at zero position, whether the contact condition of the motor carbon brush is good, whether the distribution box and operating mechanism are sensitive and reliable, and whether the pointer of the ammeter is at zero position.

8. Safety devices: Ensure that all safety devices are intact, such as protective covers, guardrails, etc.

C. Operation process of composite crusher

1. Startup sequence:

a. Start the oil pump first and wait for the return of oil to be normal before starting the motor.

b. Start the motor and wait for the equipment to run smoothly before adding materials.

c. Start the dust removal fan and turn on the water for the dust collector.

2. Feeding control:

a. Add materials evenly and continuously to avoid overloading caused by excessive one-time input.

b. The size of the material should meet the processing capacity of the crusher, as excessive material may cause equipment damage.

c. Strictly inspect the feeding situation to prevent metal objects such as hammer heads and drill bits from entering the crushing chamber.

3. Operation monitoring:

a. Pay close attention to the sound and vibration of the equipment during operation, and immediately stop the machine for inspection if there are any abnormalities.

b. Regularly check the oil indicators at all locations to ensure that the oil temperature and pressure do not exceed the specified values (the return oil temperature should not exceed 60 ℃).

c. Check whether the position display device and working position of the moving cone meet the requirements.

D. Operating Procedure for Composite Crusher

1. Before starting, check if the mechanism has a compartment door. It is strictly prohibited to open the door during machine operation to prevent danger.

2. The crusher must be started empty and will only be put into production after normal operation.

According to the requirements for particle size of the incoming materials, the conference has caused equipment damage and low output.

4. When the abnormal interrupt result indicates, stop checking, solve the problem, and then use it for production.

5. Regularly add lubricants and rotate bearing parts.

E. Shutdown operation of composite crusher

1. Stop feeding: Stop feeding first and wait for all the ore in the crushing chamber to be discharged before stopping the machine.

2. Cut off power: After shutting down, cut off the power and hang a "Do Not Close" warning sign to prevent others from making mistakes.

3. Maintenance: Regularly clean the dust and debris in the crushing chamber, replace the lubricating oil according to the manufacturer's recommended cycle, and keep the lubrication system clean.

F. Maintenance and upkeep of composite crusher

Composite crusher is used to crush iron ore, sandstone, gypsum, blast furnace slag, coal gangue, and lump coal. Long term use inevitably leads to dust accumulation, which can affect the normal operation of the composite crusher and shorten its service life. Today, I will teach you how to effectively remove dust inside the composite crusher.

1. Update the bag filters at the corners of the composite crusher and belt conveyor to bag filters respectively. According to the characteristics of dust, use water and oil repellent filter media. Bag filter is arranged outdoors, and its shell is treated with insulation and waterproofing. In order to ensure the reliable operation of the equipment, attention should be paid to the brand and specifications when purchasing key accessories for bag filters, in order to reduce the failure rate of the equipment.

2. Improve the process layout of bag filter and arrange the dust collector of the composite crusher according to the direction of the belt conveyor; Transforming the standard ash hopper of the bag filter into a double ash hopper structure eliminates the need for one screw conveyor and raises the bag filter, which is beneficial for the arrangement of the inlet duct (with a large angle of the duct); Setting an air inlet box at the air inlet allows the dust from the discharge port of the composite crusher to directly enter the air inlet box of the dust collector, saving bends, reducing system resistance, and improving dust collection efficiency. Its process layout. The ash hopper adopts a single-layer flap valve for air lock, eliminating the grid wheel feeder and its motor, reducing secondary dust and improving dust removal efficiency.

3. The dust at the corner of the belt conveyor is constrained by the site conditions, and its chute and dust hood cannot be changed. The dust removal process layout adopts a new form, which puts the dust hood in a slightly negative pressure state to eliminate the dust generated by the belt conveyor.

4. In order to improve the comprehensive dust removal effect of the composite crusher and belt conveyor, which is beneficial to the service life of the filter material and pulse valve, and also takes into account the dust generated at the ash hopper, appropriate water can be sprayed at the material inlet of the composite crusher as needed when crushing dry materials.

5. Strengthen the management of dust removal equipment, regularly check the sealing condition of the dust hood, and promptly deal with any problems found. Implement target management assessment for the job environment and dust emissions of bag filters, conduct regular dust monitoring, use economic leverage to mobilize the work enthusiasm of job personnel, improve the maintenance level of dust removal equipment, and minimize dust pollution.

G. Malfunctions and Troubleshooting Methods of Composite Crusher

1. Fault phenomenon: fine granularity; Reason: More hammer heads; Solution: Remove one or two layers of hammer heads.

2. Fault phenomenon: Coarse granularity; Reason: Loose belt or low speed; Solution: Tighten the belt and check if the voltage is 380V.

3. Fault phenomenon: The crusher body swings; Reason: Unbalanced centrifugal force of the rotor; Solution: Replace the hammer head with a new one or adjust the weight of the push head.

H. Other precautions for composite crusher

1. Prohibit overload operation: Avoid equipment overload operation, such as feeding too much or too much ore, discharging too small, etc.

2. Safety protection: Operators must wear appropriate protective equipment, such as helmets, protective goggles, earplugs, and dust masks.

3. Prohibition of illegal operations: Maintenance or adjustment of equipment during operation is prohibited to avoid danger.

4. Handover system: Adhere to the handover system, record the equipment operation status in detail for subsequent operators to understand.

Composite crusher model parameter table

Summary: The operation precautions of the composite crusher involve pre operation inspection, operation process, shutdown operation, and other aspects. Strictly following these precautions can ensure the safe operation and efficient production of equipment.

Author : Serena Chang

Serena Chang is the writer of blog and news column. With more than 10 years of working experience in the machinery industry, she has a comprehensive understanding of environmental protection machinery and is willing to share useful knowledge of environmental protection machinery.