Crusher size and fragmentation than the basic concepts

A crusher classification After pressing the crusher broken material particle size, divided as follows: ① coarse crusher (the bulk material crushed to a particle size of about 100mm), such as jaw crusher, gyratory crusher, cone crusher, impact crusher, etc; ② broken machine (from the feed particle size 100 ~ 300mm crushed to 30mm or so), such as cone crusher, hammer crusher, sand making machine, etc; ③ crushing machine (from the feed particle size 50 ~ 100mm crushed to about 3mm ), such as impact crusher, fine jaw crusher, roll crusher. Second, the size and crushing ratio 1. The size shown, the material crushing plant size, use the "feed size" and "granularity", said: feed size F80 or F90, showing the amount of feed size by 80% or 90% of the materials; Product size P80 or P90, product size discharged amount represents 80% or 90% by the time; broken confidential according to the maximum size of the crushed material to choose their form and size specifications. 2 crushing ratio Crushing ratio is one of the indicators for the technical evaluation of the crusher. The average crushing ratio is the ratio of the average particle size of the material before and after the break of. Nominal crusher crushing ratio is based on the maximum width and maximum inlet spout width ratio. When the multi-stage crushing, crushing ratio is equal to the total reduction ratio of product levels. Mostly due to the irregular shape of the solid material feed into the machine size is the size of the largest block of the long side, the expected size of 90% in the effluent through the mesh size, or ask the average particle size by sieve analysis (dcp) representation. Subsequent grinding equipment requirements: Basketball <25mm, roller mill <80mm; Suimei size depending on the application, when the coal mill size requirements of 20 ~ 30mm, the size requirements of coal combustion 20 ~ 40mm, boiling furnace coal particle size 8mm or less.