Triple Roll Crushers
McLanahan Triple Roll Crushers are ideal for producers who want to accomplish two stages of reduction in a single pass.
Applications
Depending on the duty class, they can be used in most ROM applications, such as coal, salt, lime, pet coke and potash operations. Triple Roll Crushers combine a Single Roll Crusher with a Double Roll Crusher to form a crusher that is capable of achieving a 6:1 reduction ratio in the primary stage and a 4:1 reduction in the secondary stage while producing a cubical product at high capacities. An intermeshing tooth design means that no timing gears are required.
Triple Roll Crushers have long been used in a variety of applications, including ROM feeds, coal, trona, salt, glass and other friable minerals.
How Triple Roll Crushers Work
The top stage of the crusher is made up of a toothed roll assembly, which crushes the incoming feed material against a crushing plate. This stage is designed to reduce larger feed sizes before feeding the secondary stage. When properly fed in the direction of the roll rotation, the crushing action is carried out along the full width of the curved crushing plate, which ensures maximum throughput capacity. A properly sized roll diameter and tooth configuration grabs the incoming feed and pulls it into the crushing zone without hesitation. The crushing plate has reversible and easily replaceable crushing plate tips, which provide the producer with twice the wear life and simplified maintenance.
The secondary stage of crushing consists of a Double Roll Crusher arrangement. The secondary or bottom stage is fed directly from the top stage, where the feed material is channeled between the crushing rolls. A combination of compression and shear forces created between the rolls reduce the feed material to the desired product size while producing a cubical product with minimum fines.
McLanahan’s mechanical tramp relief systems employ a spring-and-toggle mechanism that activates whenever an uncrushable object enters the crushing chamber. Once an excessive force is applied to the crushing plate, movable roll assemblies break open to allow the uncrushable item to pass. The tramp relief system then closes, returning both the crushing plate and movable roll assemblies to the previous setting while allowing the crusher to continue operating uninterrupted.
Optional features include hydraulic product adjustment, roll scrapers, automatic lubrication, wheeled support base and other custom solutions.
Why McLanahan Triple Roll Crushers
Offering the only Triple Roll Crusher in the mineral processing industry, McLanahan provides a crusher with a lower overall headroom requirement and a simplified process flow. The McLanahan Triple Roll Crusher also features hydraulic product size adjustment for both the primary and secondary crushing stages. This gives producers the option of changing size specifications or adjusting for wear if the need arises.
Triple Roll Crushers feature an automatic spring-and-toggle relief mechanism on both stages. This allows the crushing plate in the primary stage and movable roll in the secondary stage to open, safely pass uncrushable material and return to its original setting for continued operation. In addition to tramp relief, Triple Roll Crushers include access doors to assist with inspecting for wear or to facilitate roll maintenance. They are well guarded for personal protection.
Frequently Asked Questions About Triple Roll Crushers
Ask An ExpertDepending on the customer’s feed size to product size reduction ratio, two stages of crushing should be considered, such as single roll followed by a Double Roll or a Quad Roll Crusher.
The ratio of reduction is the ratio of the feed size to the desired product size. For example, if the feed size is 12” and the desired product size is 3”, then the ratio of reduction is 4:1. With Triple Roll Crushers, you have a 6:1 ratio on the top stage followed by a 4:1 ratio on the bottom stage.
Standard-Duty Triple Roll Crushers
Standard-Duty Triple Roll Crushers are the lightest-duty McLanahan Triple Roll Crusher and are designed to perform two-stage reduction of softer materials such as clean coal, salt, lime, trona and other materials.
Medium-Duty Triple Roll Crushers
Medium-Duty Triple Roll Crushers are designed to perform two-stage reduction of materials such as salt, potash, harder coals that contain medium-hard shale and slate, and other minerals, but are not suitable for hard rock and other similar materials. With both Standard-Duty and Medium-Duty Triple Roll Crushers, the drive consists of a cut tooth steel gear and pinion between the secondary stationary roll and the primary roll. In the secondary crushing section, the stationary roll drives the movable roll by means of an inter-stage V-belt drive.
Super Triple Roll Crushers
Super Triple Roll Crushers are McLanahan’s heaviest-duty model of Triple Roll Crusher. Designed for high capacity ROM coal applications, they perform two-stage reduction and are capable of throughput of up to 7,000 TPH. Segmented roll shaft assemblies provide product sizing and long-lasting wear life. The Super Triple Roll Crusher is available in dual or three motor drives.
McLanahan offers the only Triple Roll Crusher in the mineral processing industry.
Features & Benefits
- Large ratio of reduction
- Optional carbide-impregnated, weld-on teeth increase roll life three to four times over cast teeth in most applications
- Roll settings are adjustable on both stages via a hydraulic cylinder and hand pump
- Heavy-duty bearings and seals provide smooth operation and prevent dust contamination
- Top-flanged hopper is provided with bolt holes for customer feed chute connection
- Automatic lubrication option