【正文】 ne, slag and coke.This pany making the Sand breaker is suitable for the reduction ratio big situation. This pany has also made the heavy intermediate crusher, using in the stave pebbles or the difficult garrulous rock.VoestAlpine Corporation has also made one kind of Centro breaker, and this machine is loaded with the high speed turbine type rotor, which is used in the grit gravel stave, and the product granularity is 50. This machine concentrates by upside giving the material, and the material to the rigid stave cavity wall direction movement. The rotor has the wearing capacity smallest structure and the best stave effect. Productivity is about 50 tons/hour, this kind of breaker, is suitable in the stave 0～5 grade occupies 80% sand and crushed stone. This machine has two kinds of specifications: 12501250 and 16001600, the actuation power is 5575.Stave and stave machineryThis article mainly elaborated the stave basic concept, introduced the monly used stave machinery principle and technical, the stave machinery use scope and the choice, has made the detailed narration to the double roll type breaker, and introduced the breaker use.1 Stave, the reduction ratio and the crushing circuit1) Break Under the exogamic process, causes the material pellet to split the finely ground particles process, is called stave or the smashing. 2) Reduction ratio Weighs the breaker the stave effect,monly used reduction ratio this concept. After the breaker reduction ratio is raw material granularity and the stave product precision ratio of. It after expressed the stave raw material reduces degree.The reduction ratio has the following several putational method.① Of the material ratio of greatest granularity and the stave product greatest granularity calculates after stave in front ofIn this in the formula ——Stave front material greatest granularity。 custom is different, the greatest granularity value method is different. Britain and America take the material 80% can through the mesh width as the greatest granularity diameter, the former 95% be able to pass the mesh take the material the mesh width as the greatest granularity diameter.② Uses the breaker to the material mouth effective width and ratio of the dump mouth widthIn this in the formula ——The breaker gives the material mouth width?！狦uaranteed the breaker bites the material the effective width is a material.The dump mouth width value, the thick breaker takes the maximum dump mouth width?！狝fter stave material mean diameter.This method obtains the reduction ratio, can be able really to reflect the stave degree, thus the fundamental research often uses it.3) Crushing circuitThe undressed ore enters the rod to sieve 1 advanced to carry on sieves in advance, thus like this may the thin grade branch out the undressed ore in, reduces the breaker load. After sieves the material to enter the cycle breaker 2 miles, to pass through stave, the obtained product all falls with 1 undersize material to the shaker on 3, after the screening, sieves the material to enter the garrulous circular cone breaker (. intermediate crusher), the undersize material falls to the shaker on product 4 discharges which from the intermediate crusher also falls to the shaker on the screening, sieves the material to enter the circular cone breaker again in broken bits (. small aggregate crusher) in. Thus, the shaker 5 not only is sieves also is in advance inspects the screening, the inspection screening function, is the breaker dump carries on the screening, its step sizing was equal to approximately sieves the size of mesh in advance. Sieves the unqualified material to enter small aggregate crusher 6, its product returns to the shaker 5, but the undersize quality products fall the bunker 7 miles, then enters ball mill shaker 5 on unqualified materials enter small aggregate crusher 6 again.In this flow, the small aggregate crusher is staving for the close up, the cycle and the intermediate crusher basket opening is staving. The cycle breaker is a section stave (one time stave).The intermediate crusher is two sections stave (two times stave), the small aggregate crusher is three sections stave (three times stave).The entire flow also may be called the thick garrulous section, the garrulous section, Duane Jammu in broken bits the garrulous section.2 Stave machinery prime task principlesBecause the material pellet shape is irregular, moreover the material nature is different, therefore uses the smashing method is also different, has the following several methods differently using the mechanical power smashing material according to the rate of head movement:1) CrushingPuts in between two working surfaces the material, after because the infliction pressure, the material the pressed stress achieved its pressive strength breaks, this method general use in staves bulk material.2) SplittingPuts in a plane and between a belt capital edge work plane the material, when belt capital edge work plane to material extrusion,the material will chop into pieces along the pressure action line direction. The cleavage reason is because in the cleavage plane tensile stress achieved or surpasses the material tensile strength limit. Material tensile strength limit pared to pressive strength limit small very many3) SnappingMaterial bending stress function staves. Breaks the material withstanding concentrated load function two pivot simple beam or multipivot the material bending stress achieved when material bending strength, namely is broken off stave.4) ImpactingThe material is attacked the action of force to break, because its stave strength is the instantaneous action, its stave efficiency high, the reduction ratio big, the energy consumption are few, the impact has the following several kind of situations stave:① Movement object to material impact。③ The high speed movement material attacks mutua