In industrial production, the crushing equipments are more and more important. our company--Henan Hongxing Mining Machinery Company, which is a joint-stock mining machinery manufacturing enterprise integrating in science research, production and marketing in the High & New Technology Industries Development Zone of Zhengzhou, produces various types of crushers. They are mainly composed of cone crusher;double roll crusher;jaw crusher;double impeller impact breaker;vertical shaft impactor;short head (finehead) crusher; and standard cone crusher and so on.
Cone crusher: A crusher that breaks material by squeezing or compressing it between convex and concave shaped surfaces covered by manganese as the wear surface. Normally used as the second or third stage crusher. Uses compression to crush. Reduction ratio is 6-8 to 1.
Double roll crusher: A crusher that breaks material by squeezing it between two revolving metal cylinders, with axes parallel to each other and separated by a space equal to the desired maximum size of the finished product. Uses compression to crush material. Reduction ratio is 2 to 2.5 to 1. There are also triple roll crushers able to handle larger feed sizes. They also produce fewer fines per pass than do cone crushers. Roll crushers are good for producing road chips. Not recommended for abrasive rock, but very good crushing limestone.
Jaw crusher: A crusher that breaks material by squeezing or compressing it between two jaw plates, one moveable and one stationary. Normally used as a primary crusher. Uses compression and some attrition to crush material. Reduction ratio is 6 to 1.
Vertical shaft impactor: A crusher whose main mechanism rotates around a vertical axis. The rock is fed into the crusher and impacted or thrown by a table/ anvil configuration or anvil ring, and is crushed by impact either by manganese wear plates or rock-on-rock strikes. Often used to make fines or manufactured sand. Uses impact to crush materials. Reduction ratio of 4-8 to 1.
Short head (Finehead) crusher: A second- or third-stage crusher used to make product generally 1/8-inch to one inch in diameter. Because of the longer final crushing zone it tends to make more fines than a standard cone crusher. It also has a smaller feed opening than a standard cone crusher. Uses compression and a long uniform. final gap to crush material. Reduction ratio is 4-6 to 1.
Standard cone crusher: Normally the secondary, but sometimes the primary crusher, for further reducing rock. Because its smallest discharge gap is short the gradation produced is more evenly distributed and it does not make as high a percentage of fines as a shorthead cone. It has a larger feed opening than a shorthead (or fine cone). Uses compression to crush material. Reduction ratio of 6-8 to 1.spiral concentrator: http://www.mine-crusher.com/news_165.htm
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