【正文】 ——After 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。 SMD75 and the SMD94A. These two kinds of rotor type breakers are both the single rotor breaker. The hydraulic unit is the material and when the stave cavity jamming which is used for to release cannot break carries on the unloading.The DDZW1512 double pin rolls breaker is made by the pany is used in the stave intensity reaching as high as 200 mega bars materials, and its stave productivity is 50~150. The pin roll may be the obtuse edge or is the gentle centrums。當前，粉磨設備的發(fā)展，主要還在節(jié)能方面，力求降低粉磨電耗。這對延長破碎機的壽命是很重要的！6 粉碎技術的發(fā)展動態(tài)1) 設備日趨大型化，以簡化設備和工藝流程。如果帶料停機，很容易造成機件損壞。對于干法破碎，入料水分不能過高，如錘式破碎機；濕法篩分時，則必須保持適當?shù)乃浚乐挂驔_水不足而堵塞，減低處理能力。破碎機的類型及工作條件不盡相同，因而，使用時應注意一下幾點：1) 破碎機的起動。 D、振動磨礦機：利用轉軸產(chǎn)生高頻率的振動，使介質與物料互相碰擊而完成破碎作用。 (2) 圓錐破碎機礦塊處于內外兩圓錐之間，外圓錐固定，內圓錐作偏心擺動，將夾在其中的礦塊壓碎或折斷。其構造特征是破碎件之間有一定間隙，不互相接觸。物料的拉伸強度極限比抗壓強度極限小很多。振動篩5上的不合格物料再進入細碎機6。③ 用平均粒度計算式中 ——破碎前物料的平均直徑； ——破碎后物料的平均直徑。破碎比有下列幾種計算方法。轉子具有磨損量最小的結構和最佳的破碎效果。一種裝有調節(jié)破碎輥間隙的機械裝置和彈性卸載輥。OKD破碎機結構的特點是，在大型轉子上面具有巨大的破碎腔。西德QK公司制造的Mammut破碎機，是一種單轉子錘式破碎機，適用于單輥粗碎中硬到堅硬的石灰石和水泥原料。筒體內裝有耐磨襯板，筒體兩端為無阻力的給料端頭和卸料端頭。美國Mclanahan公司最近生產(chǎn)了標準型、中型和特大型二段三輥破碎機。破碎機格篩的間隙可以通過機械方式調節(jié)，并裝有過載保護裝置。西德KHD Humboldt Wedag AG公司制造多種型號的沖擊式破碎機。該公司生產(chǎn)的24英寸48英寸三輥兩端洗煤用破碎機，具有較小的破碎輥液壓裝置和皮帶輪驅動裝置。西德Hazemag公司制造的Hazemag型沖擊破碎機。Groft公司最近安裝使用的一臺MⅢ型破碎機，裝有雙驅動裝置和兩臺200馬力的電動機，其生產(chǎn)率超過200。破碎產(chǎn)品落入排料槽內。實際上，該機最適合破碎塊狀物料，不適合破碎片狀物料。附錄A輥式破碎機、沖擊式破碎機和錘式破碎機的發(fā)展概況輥式破碎機、沖擊式破碎機和錘式破碎機的應用范圍非常廣泛，能對各種不同硬度的、粘度和濕度都較大的物料進行粗碎、中碎和細碎。破碎產(chǎn)品粒度在40以下，生產(chǎn)能力為15～150。破碎腔的磨損很小，但對破碎區(qū)域還是要進行專門的耐磨保護。MⅠ型破碎機是一種小型破碎機，生產(chǎn)率為50。由英國Peabody Holmes公司銷售到整個英國的采石場。生產(chǎn)能力（破碎產(chǎn)品粒度為2英寸時）可達320。PEG型沖擊式破碎機是用來粗碎像石灰石和石膏之類的礦物。蘇聯(lián)Machinoexport公司生產(chǎn)的沖擊式破碎機，用于破碎中等硬度的耐磨礦石。一臺二段三輥破碎機能代替兩臺獨立的破碎機所能完成的破碎作業(yè)。該機能在一次運轉作業(yè)中同時完成破碎和篩分兩個作業(yè)。這種破碎機共有12種規(guī)格：給料粒度為0～25，驅動功率為100～3500。通過破碎錘的旋轉，將物料拋射到破碎腔壁上，使其受沖擊而破碎。兩種型式的破碎機都可以根據(jù)不同的需要，分別安裝上平輥、波紋輥和齒形輥。生產(chǎn)能力約為50，這種破碎機，適用于破碎0~5粒級占80%的砂石。① 用破碎前物料的最大粒度與破碎后產(chǎn)品最大粒度之比計算 式中 ——破碎前物料的最大粒度； ——破碎后物料的最大粒度。這種方法求得的破碎比，能較能真實地反映破碎程度，因而理論研究常采用它。 這個流程中、細碎機為閉路破碎，旋回與中碎機斗式開路破碎。3) 折碎 物料受彎曲應力作用而破碎。破碎機又可分為粗碎機、中碎機和細碎機。 (3) 輥式破碎機礦塊在兩個相向旋轉的圓輥夾縫中，主要受到連續(xù)的壓碎作用，但也帶有磨剝作用，齒形輥面還有劈碎作用。 各類破碎機破碎機有不同的規(guī)格，不同的使用范圍。首先應開動油泵與冷卻系統(tǒng)，經(jīng)過3～5分鐘后，待右路暢通在啟動破碎機電動機。還應防止堅硬物料如錘頭及角鐵之類落入機內。萬一出現(xiàn)事故停機，也應將機中物料清除后，才能重新啟動。電功率達7000以上，臺時產(chǎn)量300以上。同時，也在采取積極措施盡量降低磨損件的磨耗。 the obtuse edge pin roll gives the material granularity to be big. This machine is loaded with the gap adjusting device and the roll abounds elasticity protective device.American Mclanahan Corporation has produced the standard type recently, medium and the extra large type two sections and three roller s two sections of three rollers stave function replaces the stave work