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JW Bell

AGGREGATE SERVICES
& SUPPLY

The growth of the social economy has triggered an acceleration in the urbanization process. It has caused the demand for aggregate building, raising aggregate supply demand to a higher rate.

As a result, the aggregate crusher demand has rapidly increased in the recent years, along with the aggregate screening machinery. This equipment is mainly utilized for crushing pebbles, gravels, granite, stone materials, and basalts. It creates an essential raw material source for construction companies to meet the rising demands of the infrastructures.

The task of choosing the ideal primary crusher meant for your defined aggregate services application is vital. A primary crusher is the thrust behind the plant's success. There is a precise process that should be adhered to when it comes to choosing the primary crusher, and understanding what it looks like. After establishing the purpose of the crusher, one must then move to the refining model, and end with a complete installation. JW Bell provides the Aggregate Services to help with the entire process to achieve your primary goal.

LEADING AGGREGATE SERVICE

Since 1923, JW Bell has been leader in aggregate processing equipment.
As a dealer, manufacturer, and service center, we work directly with producers to provide the best equipment available to maximize productivity.

Choosing the Appropriate Crusher

The initial step in the choice of a primary crusher occurs at the highest level. It is necessary to figure out the essential purpose of the crusher.

 

The primary purpose is fundamental, since it precedes and controls the entire process of decision-making. At this time, guidance measure becomes a necessity, and a high level of experience becomes a requirement.


The two major components to put in place during the purpose identification are the size of the feed, and material type that will be crushed.

 

Other vital factors to consider:

 The site's long-term strategy

Material moisture content

Gradation of the discharge

Estimated production amount

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1. Jaw Crushers

These are the most commonly used "workhorse" crushers. They are ideal for abrasive materials, and are portable in comparison to other crushers.

 

Due to its compression mode, this machine mostly produces the most granular material, simply because it crushes the rock at natural weakness lines. As part of the primary stage solution, jaw crushers are ideal for subsequent rock preparation processing stages, for example, washing and classification.

Efficiency tips

• Preference of the grease over oil lubrication system
• Radial clearance inspection of the main frame to bear wear tracking
• Minimal setting on the discharge to fit a full load
• Periodic sampling bearing oil
• Sufficient tension on the conveyors

Feeding for efficiency

Uniform feed material distribution around the cone intake is a good practice. It creates an ideal environment for consistent production, increasing the efficiency and the reliability of the crusher operation.

Efficiency tips

• Solid rotor type for primary impactors for the reduction of costs related to maintenance
• 110% utilization when impactors have horsepower connected. Speed, setting, and crusher application should be regulated to achieve its utilization.
• Even feeding of the impactors
• A precise requirement of the calculations to meet the ideal material penetration

Feeding efficiency

Size reduction dramatically relies on the rock's conveyed energy from the rotor, which starts with feed. The first impact determines 60% of the overall crushing action, with the rest being against the breaker bar, which is adjustable.

2. Impact Crushers

These are perfectly suited for materials that are less abrasive, e.g., limestone. They are known to have vast costs of wear which increase over time. They also provide better reduction, and increased probability of a desired shape.

 

They utilize mass and velocity in the process of feed material breakdown. There is a reduction of the feed materials immediately as it enters the crusher and comes into contact with rotor hammers. Another breakage happens as the fabric gets channeled into the breaker plates.

 

They are ideal when shape is critical, and the feed material is less abrasive. The crushing in impact crushers breaks a rock in its natural line of weakness, thus producing a perfect product quality when it comes to shapes. The rate has become ideal for road stones and other aggregates that are highly specified in terms of the application.

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