What is a Cone Crusher?
A cone crusher is a secondary or tertiary crushing machine widely used in mining, metallurgy, construction, and chemical industries. It uses compression and bending forces to break medium-hard to very hard rocks and ores into finer particles. Its working principle is similar to a rotating grinder: material is continuously compressed, bent, and sheared between an externally fixed crushing wall (mantle) and an internally rotating crushing cone (concave).
Types of Cone Crusher
Single-Cylinder Hydraulic Cone Crusher: Utilizes a single hydraulic cylinder to support and adjust the discharge opening. Its structure is simple and compact, and the hydraulic system provides overload protection and automation control, resulting in a low failure rate and easy maintenance.
Multi-Cylinder Hydraulic Cone Crusher: Features multiple hydraulic cylinders arranged around the body, providing greater crushing force and more stable operation. It typically offers higher capacity and better product shape, making it suitable for fine crushing of hard materials.
Symons Cone Crusher: A classic spring cone crusher model, renowned for its stable performance and reliable durability, and is still widely used in many applications today.
Key Features of Cone Crusher
Lamination Crushing: Material forms a layer within the crushing chamber, achieving a "rock-on-rock" lamination crushing effect. This reduces energy and wear consumption while producing a more cubical product shape.
Larger Crushing Ratio: Compared to jaw crushers, cone crushers can crush material finer, making them ideal for secondary and tertiary crushing applications.
Hydraulic Clearing System: In the event of a blockage or a stopped-with-load condition, the hydraulic system can easily clear the crushing chamber, allowing for a quick return to production.
High Degree of Automation: Modern cone crushers are often equipped with automated control systems that monitor load, lubrication status, and discharge setting in real-time for optimized control.
Strong Wear Resistance: The mantle and concave are manufactured from high-wear-resistant materials like high-manganese steel, effectively resisting ore abrasion.
Cone Crusher Customization Options
Manufacturers often offer custom configurations based on specific project requirements:
Crushing Cavity Type: Depending on the crushing stage (secondary, tertiary, fine) and feed size, various cavity types such as standard, intermediate, or short head can be selected.
Eccentric Stroke: By changing the eccentric bushing, the eccentric stroke of the main shaft can be adjusted to suit different material hardness and product fineness requirements.
Automatic Control System: Optional advanced PLC control systems enable remote parameter adjustment, fault diagnosis, and interlocking control with upstream and downstream equipment.
Auxiliary Lubrication System: For high-temperature or cold regions, lubrication oil heating or cooling devices can be customized to ensure stable year-round operation.
Cone Crusher OEM Process
Original Equipment Manufacturing (OEM) for cone crushers involves precise casting, machining, and assembly processes to ensure long-term stable operation under high loads.
Design & Analysis: Finite Element Analysis (FEA) is used to analyze stress on the frame, main shaft, and crushing cavity, optimizing the structural design to ensure strength and rigidity. Material flow is also simulated to optimize cavity shape for improved crushing efficiency.
Material Selection: The frame typically uses high-strength cast steel. The main shaft is forged from alloy steel and undergoes quenching and tempering. The mantle and concave are made from high-manganese steel containing elements like chromium, molybdenum, and vanadium to enhance wear resistance and toughness.
Precision Casting & Forging: Critical components like the crushing cone and concave are made through precision casting to ensure accurate shape and internal density. The main shaft is manufactured using a forging process to eliminate internal defects and increase load-bearing capacity.
Machining & Assembly: High-precision machining is performed on critical areas such as the frame flange, main shaft bore, and drive gears to ensure assembly accuracy. During assembly, gear backlash, main shaft floating clearance, and bushing fits are strictly controlled.
Testing & Inspection: After assembly, no-load and load tests are conducted to check oil temperature, oil pressure, vibration levels, and current, ensuring all performance indicators meet design requirements.
Cone Crusher Price
The price of a cone crusher varies based on its type, specifications, automation level, and configuration. Prices for small spring cone crushers or laboratory units may range from $20,000 to $80,000. Medium-sized single-cylinder or multi-cylinder hydraulic cone crushers typically fall between $70,000 and $200,000. For large-scale, high-capacity, fully automated multi-cylinder hydraulic cone crushers used in major mines, prices typically range from $200,000 to $500,000. Key price drivers include motor power, processing capacity, automation level (e.g., intelligent control systems), the material and design life of main wear parts, and auxiliary equipment configuration.
Cone Crusher Supplier
PASCAL is a professional cone crusher supplier, with its factory established in 2017, based in Luoyang, China. The company serves as a global supplier of heavy industrial machinery, specializing in crushers and various mechanical equipment used in the mining and construction sectors. They offer a range of cone crusher product lines, from spring-type to multi-cylinder hydraulic models, to meet the diverse crushing needs of their customers.
Cone Crusher FAQ
How do I adjust the discharge opening size?
For spring cone crushers, this is typically done by adjusting the adjustment cap on the frame to raise or lower the concave. For hydraulic cone crushers, it is precisely adjusted using hydraulic cylinders or a hydraulic motor drive system.
What is "Tramp Iron"?
This refers to unbreakable objects (e.g., drill rods, bucket teeth) entering the crushing chamber. Cone crushers provide overload protection through springs or a hydraulic system, allowing the discharge opening to temporarily increase to pass the foreign object and prevent machine damage.
Why does the crusher current fluctuate significantly?
Possible causes include uneven feeding, too much or too little feed, blockage in the crushing chamber, a discharge opening that is too small, or uneven liner wear leading to unstable crushing force.
What should I do if the lubrication system return oil temperature is too high?
First, check if the cooling system is operating correctly and if the cooler is blocked or scaled. Second, check if the oil level is too low or if the lubricating oil has degraded. It could also be abnormal wear of the bronze bushings or gears causing heat.
How long is the service life of the mantle and concave?
This depends on the hardness, abrasiveness, and feed size of the material being crushed. It typically ranges from a few hundred to several thousand hours. Liners need replacement when the teeth are completely worn flat or when the minimum thickness falls below the safe limit.
When should I replace the liners?
When the crushed product size becomes noticeably coarser, and the discharge opening setting is confirmed correct, it usually indicates severe wear at the bottom of the liners. Replacement is necessary when liner wear alters the cavity shape, affecting production efficiency and product size, or if the liners develop cracks or become loose.
