What Is Primary, Secondary, and Tertiary Crushing?

Jul 10, 2020

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There are many ways to crush a rock—and depending on your industry, your location, and the project specifications, the equipment that you use and the layout by which it crushes that rock is often rather unique, especially when it comes to product size.

The degree to which material is reduced through stages of primary, secondary, and tertiary crushing can depend on the type of material, like aggregate, concrete, and asphalt, and can also depend on the variety of output sizes needing produced.

What Is Primary, Secondary, and Tertiary Crushing?

Primary crushing is the first stage of material reduction and can sometimes be the only stage needed to generate the desired product for a job. Depending on the setup, primary crushing will take the larger material that has been blasted, excavated, or reclaimed and process it through an impactor, jaw, or gyratory crusher to generate a range of product sizes.

For many aggregate producers, utilizing a closed-circuit portable crusher plant with scalping and screening capabilities can be all they need to create the product they need. But when a wider variety of product is desired and certain material is being processed, like concrete and asphalt, it can be valuable to rely on additional stages of crushing, like secondary and tertiary.

Secondary crushing, as you can imagine, is the second stage of material processing following its initial reduction. At this stage, material will flow through perhaps a second impactor or even a cone crusher, which is effective at breaking down these types of material.

There are also tertiary and even quaternary stages of crushing that exist to achieve the finer levels of material reduction. These stages in addition to secondary crushing can often be laid out utilizing an open-circuit portable crusher plant system where processed material is screened and conveyed from one crusher to the next.

Relying on these many stages of crushing beyond only primary can add great value to a crushing operation. Not only can multiple sizes of product be generated, but often in an open-circuit crushing layout, the flow and processing of material is streamlined and can increase output when compared to a closed-circuit crushing layout.

Eagle Crusher offers a comprehensive portfolio of closed-circuit and open-circuit portable crusher plants alike, manufacturing powerful equipment like horizontal-shaft impactors, jaw crushers, and cone crushers that are critical for any stage of crushing. When you speak with a Team Eagle representative, we can help you determine which crushing equipment will be best for your next project.

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Previous Posts

Which Blow Bars Are Right For You?

Which blow bars are right for your job? Blow bars are thick slabs of metal, typically some mixture of chrome, that are cast for the purpose of effectively breaking apart material like asphalt, concrete, limestone, etc. Often in sets of 3 or 4, blow bars are inserted...

Mobile Vs Portable Rock Crushers: The Pros and Cons

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Staying Safe During Warm Weather Crushing

Staying Safe During Warm Weather Crushing As the summer months roll in, bringing higher temperatures and more sun exposure with it, operating portable crushing and screening plants at outdoor locations can become more demanding and introduce new safety hazards to team...

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What Are Crushers?

What Are Crushers? Crushers are machines designed to reduce large materials, typically rocks, concrete or asphalt, into smaller materials for purposes of sizing, recycling, reduction, and more. These crushers are typically found in quarries, mines, recycling...

Eagle Crusher at World of Asphalt / AGG1 2022

Did you miss Eagle Crusher at World of Asphalt / AGG1? No worries, we’ve got you covered. Eagle Crusher was one of the 440 companies showing at the record-breaking World of Asphalt / AGG1 in Nashville, Tennessee this year. With over 11,000 attendees, Eagle Crusher was...

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All you need to know about the UltraMax® 69X in one place. From horizontal shaft impactors to jaw crushers, Eagle Crusher manufactures some of the toughest and most powerful crushing equipment on the market, empowering producers to conquer any size crushing project....

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