Impact crushers – like horizontal shaft impactor (HSI) and vertical shaft impactor (VSI) models – have an unfair reputation in some parts of the aggregate industry. Usually, it’s because they’re being misapplied or poorly maintained.
When utilized correctly, impact crushers are absolute rockstars! They produce some of the highest value, highest quality material in the aggregates industry.
Unlike the compression or squeezing action produced by jaws and cones, impact crushers (HSI and VSI) break rocks with rapid strikes. This action generates two primary benefits: high reduction ratio and precise product shaping.
Cubicle-shaped rocks are strong and have much greater particle-to-particle contacts, making them ideal for asphalt, concrete, limestone and other applications shown below.
CRUSHING STAGES:
Primary, Secondary
CRUSHING ACTION:
Blow Bar and/or Steel Curtain Impact
MAX FEED SIZE:
Up to 40″
REDUCTION RATIO:
15:1
MAX CAPACITY (STPH):
Up to 1,000
PRODUCES FINISHED PRODUCT:
Typically No
ABRASIVE APPLICATIONS:
Less Performance
COMMON APPLICATIONS:
Asphalt Rock, Ballast Rock, Benefication*, Clay & Brick, Concrete RockCubicle Product, Recycling
*Benefication: Removing unwanted material, which results in higher grade and value.
CRUSHING STAGES:
Tertiary, Quaternary
CRUSHING ACTION:
Impact with Chamber or Other Rocks
MAX FEED SIZE:
Up to 5″
REDUCTION RATIO:
Jiafu are exported all over the world and different industries with quality first. Our belief is to provide our customers with more and better high value-added products. Let's create a better future together.
8:1
MAX CAPACITY (STPH):
Up to 800
PRODUCES FINISHED PRODUCT:
Typically Yes
ABRASIVE APPLICATIONS:
Higher Performance
COMMON APPLICATIONS:
Asphalt Rock, Benefication*, Chips, Concrete Rock, Cubicle Product, Frac Sand, Glass, Manufactured Sand, Superpave Product
*Benefication: Removing unwanted material, which results in higher grade and value.
Shape rocks into uniform, high value cubicle products.
Products require less binder or cement for asphalt and concrete.
Remove unwanted material from feed (benefication).
Lower capital cost than compression crushers.
Spacious interiors improve accessibility for maintenance.
Limited recirculation of already crushed material.
Good performance for damp, clay-contaminated or sticky feeds.
Very suitable in fine crushing applications.
The Sentry HSI, Valor VSI, and Cemco™ VSI come backed by a rock-solid 2-year / 6,000-hour warranty against manufacturer defects.
Animation detailing the features of the gear drive model Valor VSI.
In general, impact crushers both vertical shaft (VSI) and horizontal shaft (HSI), the main difference from the cone crusher is the type of crushing force. The impact crusher crush by material impacting another object. The cone crusher uses compression crushing to squeeze or compress the material between the two crushing surfaces. The type of crusher and the selection of crushing process for any application depend on the material hardness, material density, feed size, required product size and capacity and the initial cost of each crusher and the cost of maintaining each type of crusher.
In order to understand Cone and Impact Crushing Processes, one must know the material that will be crushed, which will determine the optimal crusher for your business needs. When considering the material to be crushed, you must look at abrasiveness, hardness, density, amount of fines, and the finished particle shape you desire.
Impact Crushers are used to crush softer, less dense and abrasive material such as limestone. Because of its consistent striking process, an impact crusher produces uniform cubical finished products, which are desirable for hot asphalt producers. Depending on the application, impact crushers can have higher wear costs, higher maintenance, and produce more fines. Impact crushers may be used as a primary, secondary, or tertiary crusher depending on the producer’s final-product-size needs. These crushers are available in stationary, track and mobile designs. Another industry usage is slag, specifically blast furnace slag, which is less abrasive than steel furnace slag and can be broken down if processed through an impact crusher.
Cone Crushers are primarily used to crush harder, more abrasive and dense material, such as granite, which is used in construction, chemical, metallurgical and silicate industries. Cone crushers can be used in the primary, secondary, and tertiary position. These crushers are available in stationary, track and mobile designs. Cone crushers are also used in the steel furnace slag industry, which is a much more abrasive slag than blast furnace.
Impact crushers, initially, are less expensive than cone crushers. Although cone crushers are more expensive up front, they will require far less maintenance than impact crushers. The majority of maintenance costs on an impact crusher comes from wear on the blow bars and aprons which if used to crush highly abrasive material, may surpass the initial cost of the cone crusher. As stated earlier, producers must understand their industry needs and the materials they will mine in order to choose the optimal crusher.
If you want to learn more, please visit our website Horizontal Shaft Impactors.