The present disclosure relates to a cross-flow shredder for grinding material with integrated dust-tight conveying means and air recirculation, and a method for grinding material using the cross-flow shredder according to the disclosure. An apparatus and a method for comminuting material to be ground are disclosed, the apparatus comprising a feed opening for material to be ground, a feed device, a cross-flow shredder, two screw conveyors for conveying the material to be ground and an intermediate dust-tight bunker, the two screw conveyors being connected in a dust-tight manner to the cross-flow shredder on the respective feed side and in a rod-tight manner to the intermediate bunker on the discharge side, the intermediate bunker being connected to the cross-flow shredder via a hose or pipe system, and the intermediate bunker having a discharge opening closed by a slide valve.

The invention relates to a comminution device for mechanically comminuting material conglomerates consisting of materials of varying density and/or consistency, including a comminution chamber having a supply side with a supply device above the comminution chamber and a discharge side, which comminution chamber is enclosed by a circular cylindrical and/or conical, downwardly widened comminution chamber wall and has at least two portions in succession in the axial direction, in each of which at least one rotor is arranged coaxial with the comminution chamber, each rotor having a rotor shaft and having striking tools which extend substantially radially into the comminution chamber at least during operation, the rotors having opposite directions of rotation in at least two successive portions, deflection ribs being arranged on the inside of the comminution chamber wall at axial intervals and/or the radius of the comminution chamber wall increases from top to bottom.

Improved free-swinging hammermill hammer configurations are disclosed and described for comminution of materials such as grain and refuse. The hammer configurations of the present disclosure are adaptable to most hammer mill or grinders having free-swinging systems. The configurations as disclosed incorporate comminution edges having increased hardness for longer operational run times. The improved configurations improve installing, removing, and cleaning hammer components within the hammermill. More particularly, a method for replacing hammers and spacers includes pre-assembling hammers, spacers, hammer saddles, locking collars, or any combination thereof and temporarily attaching them to one another before placement onto a hammermill rod. Once placed on the hammermill rod, the temporary attachment is broken such that the hammers within the pre-assembled group may move freely with respect to one another.

Improved free-swinging hammermill hammer configurations are disclosed and described for comminution of materials such as grain and refuse. The hammer configurations of the present disclosure are adaptable to most hammer mill or grinders having free-swinging systems. The configurations as disclosed incorporate comminution edges having increased hardness for longer operational run times. The improved configurations improve installing, removing, and cleaning hammer components within the hammermill. More particularly, a method for replacing hammers and spacers includes pre-assembling hammers, spacers, hammer saddles, locking collars, or any combination thereof and temporarily attaching them to one another before placement onto a hammermill rod. Once placed on the hammermill rod, the temporary attachment is broken such that the hammers within the pre-assembled group may move freely with respect to one another.

Improved free-swinging hammermill hammer configurations are disclosed and described for comminution of materials such as grain and refuse. The hammer configurations of the present disclosure are adaptable to most hammer mill or grinders having free-swinging systems. The configurations as disclosed and claimed are non-forged and incorporate a saddle or hammer mouth. The merging of a hammer and saddle improves strength to reduce or maintain the weight of the hammer while increasing the amount of force delivered to the material to be comminuted. The improved configurations incorporate comminution edges having increased hardness for longer operational run times. The improved configurations improve installing, removing, and cleaning hammer components within the hammermill. The improved configurations may incorporate hammermill rod hole of varying shapes and sizes and saddles of varying shapes and sizes or the use of non-planar hammer bodies that have a recessed or protruding surface.

Improved free-swinging hammermill hammer configurations are disclosed and described for comminution of materials such as grain and refuse. The hammer configurations of the present disclosure are adaptable to most hammer mill or grinders having free-swinging systems. The configurations as disclosed and claimed are non-forged and incorporate a saddle or hammer mouth. The merging of a hammer and saddle improves strength to reduce or maintain the weight of the hammer while increasing the amount of force delivered to the material to be comminuted. The improved configurations incorporate comminution edges having increased hardness for longer operational run times. The improved configurations improve installing, removing, and cleaning hammer components within the hammermill. The improved configurations may incorporate hammermill rod hole of varying shapes and sizes and saddles of varying shapes and sizes or the use of non-planar hammer bodies that have a recessed or protruding surface.

A multistage hammer mill (10) has a plurality of milling stages arranged concentrically about each other. The plurality of milling stages arranged so that substantially all material in a first inner most of the milling stages passes through all subsequent adjacent milling stages. The milling stages include a first milling stage and a second milling stage. A central feed opening (12) enables material flow into a primary impact zone (14) of the first milling stage. The first milling stage has an impact mechanism (16) and a first screen arrangement (20a). The impact mechanism (16) rotates about a rotation axis (18). The first screen arrangement (20a) is disposed circumferentially about and radially spaced from the impact mechanism (16) and is provided with a plurality of apertures (22) through which impacted material of a first size range can pass. The second milling stage has a second arrangement (20b) disposed circumferentially about and radially spaced from the first screen arrangement (20a) and a circular array of impact elements (50a) disposed between the first screen arrangement (20a) and the second screen arrangement (20b).

The crushing and classifying device of the present disclosure includes a crushing chamber into which an electrode material is inserted, a rotating shaft, a striking body, and a screen. The rotating shaft is disposed in the crushing chamber and rotates under a driving force. The striking body has a rod shape or a chain shape, and is rotatably connected at one end to the rotating shaft, and rotates in the crushing chamber by receiving a centrifugal force associated with the rotating of the rotating shaft. The screen is provided on a wall surface of the crushing chamber, and classifies the crushed electrode material. The striking body includes, at least at its distal end, an edge portion rounded to have a radius of curvature greater than or equal to 1 mm and less than or equal to 9 mm. The screen has an opening that is equal to or less than 5 mm.

The crushing and classifying device of the present disclosure includes a crushing chamber into which an electrode material is inserted, a rotating shaft, a striking body, and a screen. The rotating shaft is disposed in the crushing chamber and rotates under a driving force. The striking body has a rod shape or a chain shape, and is rotatably connected at one end to the rotating shaft, and rotates in the crushing chamber by receiving a centrifugal force associated with the rotating of the rotating shaft. The screen is provided on a wall surface of the crushing chamber, and classifies the crushed electrode material. The striking body includes, at least at its distal end, an edge portion rounded to have a radius of curvature greater than or equal to 1 mm and less than or equal to 9 mm. The screen has an opening that is equal to or less than 5 mm.

A grinder having a rotor and fan assembly mounted in a housing having one or more of the following features: a cutting shaft and a fan shaft which are concentric and are rotated by separate motors; a housing formed in two sections, with a line of division passing through the axis of rotation of the shafts and mounted on rollers; ping pong shaped cutting hammers; and deflectors attached to the inside of the housing and to a deflector assembly on the outside of the housing. The deflectors are movable vertically and horizontally with first and second motion controllers for adjusting the spacing between the cutting hammers and the deflectors. A programmable logic controller is used for independently controlling the speed at which the cutting shaft and fan shaft are rotated and the spacing between the cutting hammers and the deflectors to produce a desired particle size reduction for a selected material.