Roll Crusher (or Roller Crusher) is used for middle crushing and fine crushing of all kinds of ores and rocks under mid-hardness in mine, chemical industry, cement, building materials and other industrial sections. This crusher has simple structure and can be operated conveniently. Ideal product size depends on adjusting space between two rollers.
These roll crushers are available with Gundlach breakthrough 3-D crushing technology that includes intermeshing continuous tooth roll design and positive roll timing that delivers the industrys best dimensional product control, fewer fines and elimination of over-size material. Gundlachs roll crushers deliver higher quality cubical product, minimal fines and consistently repeatable performance for sizing coal, coke, glass, fertilizer, potash, salts, lime, limestone, soft ores, friable materials and industrial minerals.
Roll Crusher is made up of two cylindrical rolls which are installed horizontally. The two rolls rotate in different directions, materials fall on top of the rollers and enter crushing chamber under the action of roll surface friction to be crushed by the rollers, and the final product is discharged from outlet. The crushing process is continuous. The crusher has strong discharging force, so even wet materials can also be discharged.
Roll Crushers are compression type crushers, and were once widely used in mining. They have, within the last 10 or so years, fallen into disfavor among mining and processing companies. The probable reason is because the large mines require very large crushed product output with minimal cost, makes the roll crusher uncompetitive. The roll crushers are not nearly as productive as cone crushers, with respect to volume, and they do have a little higher maintenance associated with them. Roll crushers do, however, give a very close product size distribution, and if the ore is not too abrasive, they do not have high maintenance costs.
The particles are drawn into the gap between the rolls by their rotating motion and a friction angle formed between the rolls and the particle, called the nip angle. The two rolls force the particle between their rotating surface into the ever smaller gap area, and it fractures from the compressive forces presented by the rotating rolls. Some major advantages of roll crushers are they give a very fine product size distribution and they produce very little dust or fines. Rolls crushers are effectively used in minerals crushing where the ores are not too abrasive and they are also used in smaller scale production mining of more abrasive metal ores, such as gold. Coal is probably the largest user of roll crushers, currently, though. Coal plants will use roll crushers, either single roll or double roll, asprimary crushers, reducing the ROM coal. Usually, these crushers will have teeth or raised forms on the face of the roll. (Roll crushers used for minerals and metal ores have smooth faced rolls.
As a professional and the best mining machinery manufacturer in China, Hongxing Machinery is always ready to provide the superior rock grinder, impactor crusher, and these machines have the most competitive price and the most reliable quality so that they are the top choices for the high performance crushing equipment.