Double Roll Crusher Design: Marcy 9 x 12in, Max. Feed 8,000 lbs
Double Roll Crushers are for single pass size reduction of medium hard to hard materials like rock or ore to a minus 10 mesh. Topsize is about 13mm and final fineness will pass a No. 10 (2mm) opening depending on material. Roll Crushers do compression crushing to improve material processing efficiency especially with feed friable materials that are tacky or clay like. They work well in preparing samples for further fine reduction with a pulverizer. Output size is controlled by adjusting the gap between the rolls with a hand lever. Feed hoppers have high capacity, open for cleaning and maintenance access and have an electrical safety interlock that shuts off power to the unit when the hopper is opened.
The crushers are rugged with easy operation to meet the demands of lab and pilot plant use. Double Roll Crushers are mounted on a steel base, have relief springs and are fully guarded. They are fabricated steel with a fabricated steel drive guide for safety. Tilt feed hopper, Ni-hard roll facings for long life, relief springs and heavy duty pillow block bearings. Crushing chamber designed to reduce material size and prevent choking.
Marcy Double Roll Crusher 9x12in (229x305mm) Dia.xW 304 stainless steel compression crushing rolls with Ni-hard roll facings. V-belt drive with 5hp TEFC motor for uniform peripheral speed through out the crushing process. Can reduce most rock like materials of 0.5in (13mm) feed size to minus No. 10 (2mm) at 8,000lbs (3,629kg) per hour. 60Hz. Select 230V or 460V when ordering.
Overview
Roll crushers are a versatile and efficient type of crusher that use two or more adjacent rolls to crush materials. Used in the mining and cement industries roll crushers are good for a wide range of materials like rock, ore and clinker. They operate in an open circuit where the crushed product is screened to a mesh size much smaller than the set gap. In the cement industry roll crushers are very useful for reducing raw materials like limestone, clay and sand to a consistent and manageable feed for further processing.
Double Roll Crusher Design
A double roll crusher is designed to crush material with two rolls that rotate in opposite directions. The design of a double roll crusher involves several factors like roll size and shape, gap between the rolls and speed of the rolls. Unlike single roll crusher which uses one roll to crush the material double roll crusher gives more balanced and efficient crushing. The double roll crusher design ensures the material is evenly distributed across the rolls resulting in uniform product size and less wear on the compression crushing surfaces.
Marcy Double Roll Crusher Features:
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Heavy duty pillow block bearings for smooth and low maintenance operation
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Safety interlock shuts down power when hopper is lifted and safety guards cover moving parts
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Single hand lever for roll gap adjustment
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Fabricated steel construction
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Mounted on steel base
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Roll speed is critical for double roll crusher performance, affects crushing efficiency, torque and reaction forces.
Marcy Double Roll Crusher Specifications:
Max. Particle Size 0.5in (13mm)
Max. Feed 8,000lbs (3,629kg) per hour
Final Size Minus No. 10 (2mm). The rolls rotate in opposite directions to get the desired crushing.
Composition Cast Ni-hard roll facings, 9 x 12in (229 x 305mm) DxW
Application rocks, ores, minerals
Electrical 230/460V / 60Hz, 5hp / 3 Phase. Both rolls usually rotate at the same speed to get efficient crushing zone.
Product Dimensions 64 x 48 x 46in (163 x 122 x 117cm) WxDxH
Choosing the Right Crusher
Choosing the right roll crusher for your application requires careful consideration of several factors. The material to be crushed, its feed size and the desired product size are all important variables in the selection process. Also the tooth configuration, flowability and throughput capacity of the material must be evaluated. The hardness of the material, potential shock loading and the crusher’s design and drive configuration also plays a big role. By evaluating all these factors you can choose a roll crusher that is perfect for your application and get optimal performance.
Tooth Configuration and Roll Surfaces
Tooth configuration and roll surfaces of a roll crusher is very important for its performance and life. There are many tooth patterns, designs and configurations available each for specific application. Choosing the right metallurgy and tooth configuration is crucial to get maximum crusher capacity, product shape and wear life. Smooth rolls are used for crushing softer material to get finer product with minimal fines. Toothed rolls are used for crushing harder material to get more grip and reduce the material to desired size. Advances in casting and availability of exotic metals has further improved the durability and efficiency of roll crushers.
Throughput Capacity and Flowability
Throughput capacity of a roll secondary crusher is affected by many variables, roll diameter, feed material, feed size and desired product size. The gap between the rolls or between the roll and the crushing plate must be calculated carefully to get efficient processing. How each material reacts during crushing is very important in determining the overall crusher selection. Also the flowability of the feed material especially if it’s tacky or clay-like must be considered. By considering these factors you can optimize the throughput capacity and get smooth and efficient crushing.
