— In coarse comminution, double roll crushers (DRC) are used for the size reduction of blasted materials and in secondary comminution. In the primary crushing stage, DRC with toothed rolls are of particular importance. In contrast to smooth rolls, these offer improved nip conditions so that larger particles can be nipped, and crushed.

 — Roll crushers are generally not used as primary crushers for hard ores. Even for softer ores, such as chalcocite and chalcopyrite, they have been used as secondary crushers. Choke feeding is not advisable as it tends to produce particles of irregular size.

 — Crushers may be used to reduce the size of materials, or change the form of waste materials so they can be more easily disposed of or recycled, or to reduce the size of a solid mix of raw materials so that pieces of different composition can be easy for next step separation. Understanding the different so you can achieve the maximum efficiency.

Double-roll crushers are able to crush more finely than single-roll crushers, because they are designed with teeth that mesh together rather than rotating past a smooth plate. They can reduce coal to as little as ¼ inch (0.6 cm) topsize, although they are more commonly operated close to 2 inches (5 cm).

 — Are roll scrapers or differential roll speeds required to provide a self-cleaning action to prevent material build-up on the roll surfaces? Is water being added? The differential in roll speeds imparts compression crushing but also the added benefit of a tearing/shearing action.

 — Understanding how to best match the type of crusher to the right crushing stage, as well as working with a manufacturer to properly size the crusher, will ensure crushing and feeding efficiency throughout an operation and, ultimately, overall profitability.

The Steele Smooth Roll Crusher plays a key role in bulk raw material preparation, processing clays, coal fines, coke breeze and gypsum waste. Twin rollers reduce pebbles and plastic lumps to form thin, flat discs, strips or sheets of material for additional processing or pugging.

 — Additionally, they can be noisy and require a lot of maintenance. Types of Impact Crushers. There are several different types of impact crushers, each designed for specific applications. The two most common types are horizontal shaft impactors (HSI) and vertical shaft impactors (VSI).

Disadvantages of Roller Crusher. Due to the simple structure, the production capacity of reliable toothed roll crusher is low, which requires continuous and uniform feeding. Moreover, the easy abrasion of the roller surface increases the gap between the two rollers, resulting in uneven product size, which requires frequent repairs.

Smooth roll crushers have their own set of advantages and disadvantages that make them suitable for certain applications. Let's take a closer look at the pros and cons of these machines. One advantage of smooth roll crushers is their simplicity in design and operation.