Operating Rules Of Cone Crusher

In the mining, quarrying and aggregate processing industries, Cone Crusher is one of the most critical equipment for secondary and tertiary crushing operations. Its operating efficiency directly affects production capacity, product quality and overall operation profit. However, even the top-tier cone crusher may suffer poor performance or premature component damage if specified operating rules are not followed. This guide provides a comprehensive set of operating rules for cone crushers applicable to global users, covering pre-start procedures, feeding operations, liner management and safety regulations. It further elaborates on how to select a reliable Cone Crusher Manufacturer, with Shanghai Dongmeng Equipment introduced as a trustworthy partner serving customers worldwide.

I. Pre-start and Daily Inspection Rules

Before starting any cone crusher, operators must conduct a full inspection to prevent unexpected breakdowns. The daily inspection items widely recommended by industry experts are as follows:

- Lubrication System Check: Inspect the oil level, oil temperature and oil pressure of the oil tank. The first oil change shall be carried out after the new cone crusher runs for 100 hours, and the second after 300 hours. After that, the oil should be replaced every 500 hours, or immediately if oil contamination is found.

- Seal and Dustproof Check: Check for accumulated foreign matter under the dust-proof sealing rings to ensure they can move freely with the moving cone. Damaged seals will allow dust intrusion and accelerate wear of key components.

- Motor Power Monitoring: Monitor the power consumption of the motor. Abnormal power fluctuations may indicate improper feeding or hidden mechanical faults.

- Fastener Check: Verify all bolts, connectors and adjusting ring screws are tightly fastened. Loose fasteners may cause equipment misalignment and accelerated wear.

- Abnormal Noise Detection: Any abnormal sounds during operation, such as knocking, friction or violent vibration, shall be investigated immediately, as these usually signal bearing wear, loose moving cone liners or gear damage.

II. Core Feeding Rules

Proper feeding is one of the most critical factors affecting cone crusher performance and liner service life. Two core principles must be followed:

1. Maintain Choke Fed Condition

Cone crushers are designed to operate under "choke fed" conditions, meaning the crushing cavity shall be fully filled with materials, and a continuous and uniform material layer of at least 150mm shall be kept above the moving cone. Choke feeding facilitates interparticle crushing to obtain superior cubical particle shape and maximize liner utilization rate.

Critical Warning: Never operate the equipment with an empty crushing cavity or sudden unstable material impact. Running under non-choke fed conditions will cause the moving cone to spin out of control at 200 to 300 revolutions per minute, which may result in component damage and accelerated liner wear. Intermittent feeding throughout the day should be avoided, and a stable and continuous material flow shall be provided instead.

2. Control Characteristics of Feeding Materials

- Fines Content: The feed shall contain about 10%-15% materials with particle size smaller than the closed side setting (CSS), which assists crushing. Pre-screening out 6-10mm aggregates should be avoided, as it will increase voids in the crushing cavity and raise the proportion of flaky and elongated particles in finished products.

- Moisture Control: Overly wet or sticky feed may block the crushing cavity, leading to shutdown or even mechanical damage.

- Feed Size Compliance: Material particle size must conform to the maximum feed opening size specified by the crusher. Oversized feed may get stuck in the crushing cavity or damage moving cone liners.

III. Liner Work Hardening Procedures

Manganese steel liners (mantle and concave) are designed to work harden under impact and compression. Proper work hardening of new liners can extend their service life by up to 30%. Follow the step-by-step running-in procedures below:

1. Stage 1 (First 6 hours): Run at 50% rated power (approximately 65% of maximum current) under choke fed condition. At this stage, the liners crush rocks without reaching full production capacity, and their surfaces gradually achieve work hardening.

2. Stage 2 (Next 2 hours): Raise operating power to 75% (approximately 80% of maximum current) while maintaining choke feeding.

3. Stage 3 (Thereafter): The liners shall be fully work hardened. From this point on, the equipment can continue to run at nearly or full 100% rated power.

Skipping this gradual work hardening process will lead to premature liner wear, low utilization rate and degraded finished product quality.

IV. Safety Rules and Personnel Qualification Requirements

Cone crusher operation involves high-energy rotating machinery, heavy components and hydraulic systems. The following safety rules are universally applicable worldwide:

- Personnel Qualification: Only trained and authorized personnel are allowed to operate the equipment. Electrical work shall be performed by certified electricians; hydraulic system maintenance requires professional knowledge and experience.

- Personal Protective Equipment (PPE): Operators must wear safety helmets, goggles, earplugs, dust masks, well-fitted work clothes, steel-toe safety shoes and reflective vests.

- Prohibition of Loose Clothes and Jewelry: Loose or oversized clothes shall not be worn, long hair must be tied up, and jewelry (rings, bracelets, etc.) is forbidden, as these items may be caught by rotating parts and cause severe injury or even death.

- Restricted Access Zones: Never place hands near unguarded machine openings. Crushing cavities and conveyor discharge areas carry severe entanglement risks. Do not linger under the main conveyor or discharge zone.

- Lockout-Tagout Procedure: Before any maintenance, lubrication or adjustment, shut down the machine, implement lockout-tagout procedures, cut off all power sources, release hydraulic system pressure and let the equipment cool down. Obvious warning signs shall be hung on the equipment.

- Emergency Shutdown: If any fault indicator lights up, an alarm sounds or abnormal operating conditions are detected, shut down the equipment immediately and lock it out. Troubleshoot before restarting.

Cone Crusher Manufacturer Selection and Advantages of Shanghai Dongmeng

Strict compliance with operating rules is essential, yet the foundation for reliable cone crusher operation lies in selecting a trustworthy manufacturer. A well-designed, robustly manufactured crusher equipped with intelligent monitoring and comprehensive after-sales support can significantly reduce the frequency and severity of operational problems. Key criteria for evaluating manufacturers include ISO 9001 quality certification, reliable project track records, production capacity, as well as availability of spare parts supply and technical support.

Shanghai Dongmeng Road & Bridge Machinery Co., Ltd. is a manufacturer meeting all the above standards and serving global customers. As a national high-tech enterprise focusing on the R&D and manufacturing of crushing and screening equipment, Shanghai Dongmeng has passed ISO 9001:2015 certification and meets CE, GOST, BV and TUV compliance requirements, which proves its commitment to international quality and safety standards.

The company’s product line includes two flagship cone crusher series to meet diverse application demands:

1. DMC Compound Cone Crusher

This series adopts the mature Symons gyratory crushing design principle, featuring optimized crushing cavity profiles, larger main shaft diameter and independent lubrication stations for powerful, durable and reliable operation. The efficient hydraulic jacking system can quickly clear tramp iron or blockages, greatly reducing downtime. The DMC series covers multiple specifications from 1000mm to 1680mm, with cavity profiles ranging from extra fine to coarse crushing for various working conditions.

2. DHY Hydraulic Cone Crusher

The DHY series represents advanced hydraulic cone crusher technology, integrating interparticle crushing principles through optimized rotating speed, stroke and crushing cavity combinations. Its main features include:

- Intelligent Digital Control: Real-time display of crushing status and operating parameters; programmed fault alarm and automatic oil pressure adjustment.

- Multi-functional Adaptability: It can be flexibly converted to coarse, medium or fine crushing configurations via component repositioning and wear part replacement.

- Automatic Cavity Clearing: When tramp iron jamming occurs, the hydraulic system automatically cleans the crushing cavity without equipment disassembly.

- Independent Lubrication System: Specialized oil circuit lubrication ensures sufficient circulation and cooling for bearings to extend component service life.

Beyond the equipment itself, Shanghai Dongmeng provides full-range supporting services: 7×24-hour customer service, experienced engineering teams for on-site configuration analysis, and a global sales network covering more than 26 provinces in China, Southeast Asia, Africa, Europe and other regions.

V. Conclusion

Efficient cone crusher operation follows clear and universal rules: conduct rigorous pre-start inspections, maintain choke fed conditions, follow proper work hardening procedures and strictly implement safety regulations. These measures can maximize production efficiency, extend liner service life and cut unplanned downtime. Nevertheless, standardized operation must be matched with reliable equipment, which is the tangible value brought by cooperating with verified manufacturers like Shanghai Dongmeng. With its ISO-certified products, intelligent DHY and DMC crusher series and global service capacity, Shanghai Dongmeng delivers solid support for cone crusher users worldwide. For crusher operators across the globe, the combination of standardized operation and premium equipment is the most reliable path to sustained profitability.