Information AboutCrusher |
| CATEGORIES ABOUT CRUSHER | |
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A crusher is a Machine designed to reduce large solid Chunk s of Raw Material into smaller chunks. DESCRIPTION Crushers are commonly classified by the degree to which they fragment the starting material, with coarse crushers not reducing it by much, intermediate crushers fragmenting it much more significantly, and Grinders reducing it to a fine Powder . From an extractive metallurgical standpoint, there is a significant difference between crushing and grinding. In essence, crushing is a preliminary step to ensure that ore does not exceed certain dimensions which a grinder is capable of handling well. A typical circuit at a mine might consist of a crusher followed by a SAG Mill followed by a Ball Mill . In this context, the SAG mill and ball mill are considered grinders rather than crushers. TYPES OF CRUSHERS The two best known types of coarse crusher are the jaw crusher and gyratory crusher. By compaction method Jaw crusher A jaw or toggle crusher consists of a set of vertical jaws, one jaw being fixed and the other being moved back and forth relative to it by a Cam or Pitman mechanism. The jaws are farther apart at the top than at the bottom, forming a tapered chute so that the material is crushed progressively smaller and smaller as it travels downward until it is small enough to escape from the bottom opening. The movement of the jaw can be quite small, since complete crushing is not performed in one stroke. Gyratory crusher (cone crusher) A gyratory crusher (or Cone crusher) is similar in basic concept to a jaw crusher, consisting of inner and outer vertical crushing cones; the outer cone is oriented with its wide end upward, and the inner cone is inverted relative to the outer with its apex upward. The inner cone has a slight circular movement, but does not rotate; the movement is generated by a Cam or Eccentric arrangement. As with the jaw crusher, material travels downward between the two cones being progressively crushed until it is small enough to fall out through the gap between the two cones at the bottom. Impact crushers Impact crushers involve the use of Impact rather than Pressure to crush material. The material is contained within a cage, with openings on the bottom, end, or side of the desired size to allow pulverized material to escape. This type of crusher is usually used with soft material such as Coal , seeds, or soft metalic ores.
Roller crushers One type of intermediate crusher consists of a pair of horizontal cylindrical rollers through which material is passed. The two rollers rotate in opposite directions, "nipping" and crushing material between them. A similar type of intermediate crusher is the edge runner, which consists of a circular pan with two or more heavy Wheel s known as mullers rotating within it; material to be crushed is shoved underneath the wheels using attached Plow blade Mobile crushers Crushers mounted on tracks or wheels. Popular in Recycling applications due to their ease of installation on building sites. BY USE SEE ALSO EXTERNAL LINKS |
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