【正文】 project needs (hardly to hard).QK Corporation makes the garrulous hammer type breaker have 10 kinds of specifications, using in stave as the hard material or thick garrulous cement raw material, and the electric motor power are 30～400, and the stave productivity is 20～280.Czechoslovakian Pragoinvest Corporation making 8 kinds of specifications the OKD impact type hammer type breakers, is used in the stave productivity being high, the reduction ratio is also big. The OKD breaker structure characteristic is, having the giant stave cavity above the largescale rotor. Through stave hammer revolving, project the material to the stave cavity wall on, and cause it to attack stave. The bulk material which has not been broken falls down the discharge hole place riddle, attacking stave once more.This kind of breaker been used the hydraulic control system, is loaded with the riddle in the breaker behind dump mouth place and used in disassembling with installing the stave hammer the hydraulic unit.West German PHBWeserhutte(PWH) Corporation makes the single roll and the double rolls breaker, and its crushing roller may be the smooth roll, perhaps on the garrulous roller the chamfer, and is loaded with the stave tooth. This kind of breaker is used in stave hard or the soft material.The PWH single rotor hammer type breaker of the pany also is used in stave as softly as the hard material, and has the very high reduction ratio, and may cause the stave product the granularity to be smaller than 3 millimeters.Australian VoestAlpine Corporation makes two patterns the double rolls breaker. One kind is loaded with the adjustment crushing roller gap mechanism and the elastic unloading roller. Two pattern breakers both may accord the different need, installing the first tone roller, the ripple roller and the serrated roller separately. The first type is used in stave materials and so on limestone, gypsum, pearlier。s quarry from English Peabody Holmes. The APP2030 bulldozer and the APKM1630 intermediate crusher are two kinds of largescale impact type breakers, presently pays the English quarry use. Two equipment contract prices are 125 pounds (in contract including supplies electric drive equipment, specialpurpose speed control equipment and energy recycling installment).At present several hundreds Hazemag impact type breakers have been used in the limestone and other mines. In which majority breakers productivity has all surpassed for 500.American HewittRobins Corporation is producing the double rolls type and three rolls type breaker, the impact type breaker and the hammer type breaker. The double rolls type breaker is used in the process load big work, its productivity surpasses for 810, this machine has used the hydraulic pressure crushing roller installment, and the overload protection spring and the oak rubber tire drive type. This pany produces 24 inches48 inches three rolls both sides coal washing used the breaker, and has the small crushing roller hydraulic unit and the belt pulley drive. Productivity (stave product granularity is when 2 inches) may amount to for 320 .The HewittRobins impact type breaker is one kind of high efficiency, big the reduction ratio impact type breaker. Its specification respectively is 36 inches54 inches and 48 inches66 inches. This machine productivity is decided by the riddle through whole size. When the riddle clear size of opening is inches, its productivity may amount to for 900.This pany also makes two kinds of specifications the hammer type breakers, namely: 36 inches 32 inches and 48 inches32 inches, its riddle lattice bar and the spacing all are adjustable. This kind of hammer type breaker productivity may amount to for 190, the rotation is 1350. But the special high speed largescale hammer type breaker rotation is 1800.West German KHD Humboldt Wedge AG Corporation makes many kinds of the impact type breakers. The PEG impact type breaker is used for the thick garrulous as like limestone, the gypsum and so on mineral. This machine has 9 kinds of specifications, and its productivity may up to 1650, may amount to for the material granularity, the product granularity is 0~15. This pany makes the PEF impact type breaker is very small for the material granularity, may amount to , and the product granularity is 0~44. This pany also made the PEK impact type breaker used in the pulverized coal work, and some 10 specifications, biggest productivity amounted to for 2000, amounted to for the material granularity. KHD Corporation makes the WB25 double rolls breaker, is suitable for the stave medium degree of hardness material. This machine is loaded with the double crank which connects with the rack (wrist plate) to install, thus has guaranteed the stave strength reasonable distribution. This kind of breaker diameter is , the width is 3, can break the medium degree of hardness material, it gives the material granularity is 250, the product granularity is 75, productivity is 2223. The breaker riddle gap may through the mechanical way adjustment, and is loaded with the overload protection.Soviet Machinoexport Corporation produces the impact type breaker, is used for the stave medium degree of hardness the wearresisting ore. This kind of breaker needs the actuation power is small, but the reduction ratio is big. This pany also makes many kinds of pattern rotor type breaker which is used in thick garrulous, garrulous and broken bits, having SMD85A and SMD86A。附錄BDevelopment survey of roller type breaker,impact type breaker and hammer type breakerThe roller type breaker, the impact type breaker and the hammer type breaker application scope is extremely widespread, can to each kind of different degree of hardness, the viscosity and the humidity all big material carries on thick garrulous, is garrulous and is in broken bits. This kind of crusher stave efficiency is especially high, the ener