Basics of Gyratory Crushers

Gyratory crushers are the initial driving force for the entire mineral processing circuit. Gyratory crushers comprise a cone portion, eccentric portion, drive portion, and cylinder portion that are rotated by a motor-driven horizontal shaft, a horizontal shaft driven by the eccentric rotation of the gear, and then driven by the eccentric portion in a circular cone movable pivot to achieve continuous extrusion crushed stones.

The cone can be moved up and down by adjusting the hydraulic cylinder at the bottom of the moving cone to conveniently change the size of the discharge port and the size of the product particle size. At the same time, the hydraulic cylinder serves as an iron protection device. When an unbreakable object like an iron block enters the crushing chamber, the hydraulic cylinder can automatically cause the moving cone to fall, releasing the iron block and allowing the crushing to continue.

Primary gyratory crushers are built to receive run-of-mine (ROM) rocks directly from mines and crush them to a maximum of one-tenth of their original size. Typically, metallurgical operations necessitate greater size reduction and products from primary gyratory crushers are conveyed to secondary or cone crushers for further size reduction.

Gyratory crushers, like jaw crushers, reduce size primarily through the compressive action of two pieces of steel against the rock. Continuous size reduction occurs as the distance between the two plates decreases. In addition, gyratory crushers can handle a wide range of feed particle shapes, including slabby rock, which jaw crushers cannot handle due to the shape of the feed opening.

Product features

• With the crushing performance, the crushing chamber can be adapted to various crushing application conditions.
• Manganese steel wear parts are standard, with optional chrome alloy fixed cone lining and lower frame lining.
• The effective dustproof seal includes a positive pressure blower to keep dust out of the eccentric and driving devices and to extend the life of the crusher bearing.
• The balanced design is suitable for mobile or fixed crushing operations.
• The beam bushings and seals can be easily replaced without removing the beam, saving manpower, time, equipment consumption, and production losses associated with downtime.
• The heavy-duty integrated spindle has an alloy steel threaded spindle sleeve to reduce spindle stress.
• The moving cone lock nut with the cutting ring facilitates the removal of the moving cone liner.
• High-strength frame design can work without failure and extend service life even under severe crushing conditions.
• To prevent the moving cone from becoming loose during the crushing process, the main shaft and moving cone are cast into one body.
• An external backlash adjustment device for large and small gears.
• The patent thrust bearing wear indicator reaches the worn thickness by dissolving harmless silver in the lubricating oil.
• The spindle position control system allows you to easily adjust the spindle to compensate for liner wear and control the product size.

Design benefits of gyratory crushers

A gyratory crusher consists of a solid cone mounted on a rotating shaft and housed within a hollow body with conical or vertically sloping sides. When the crushing surfaces come into contact with each other, the material is crushed, and the crushed products fall through the discharging opening.

Like the jaw crusher, the largest gyratory crusher can handle boulders up to 1.5 m in length.

This crusher can handle products with a Mohs hardness between three and five.

There is no mutual sliding on grinding surfaces, only rolling of the nut on concaves. As a result, the wear is uniform and minimal.

Gyratory crushers are susceptible to jamming if sticky or moist products loaded with fines are fed into the machine.

Wear on gyratory crushers is most significant in the lower part because compression forces are applied to the entire grinding surface.

The typical reduction ratio of gyratory crushers is between six and eight, similar to jaw crushers.

When the production and flow rates are equal, the power consumed by a gyratory crusher is comparable to that of a jaw crusher.

Why choose IMS Engineering?

IMS Engineering offers a range of high-quality and reliable specialist solutions for crusher plants at competitive prices. Our complete range of solutions is manufactured and supplied by world-leading brands for guaranteed efficiency. This includes ETCL/Kawasaki primary gyratory crushers, cone crushers, jaw crushers, impact crushers, grinding mills and vibrating screens. With more than 60 years of experience and partnering with leading brands of specialist equipment, IMS Engineering is an industry leader and the ideal partner for your comminution mining company.

Contact IMS Engineering for details

Contact us for more information about primary gyratory crusher equipment for crushing plants. If you want to know more about our offers on other mining and industrial technology and how our team can improve your facility, chat with a representative from IMS Engineering today.