A multistage hammer mill 10 has a plurality of milling stages arranged concentrically so that substantially all material in a first innermost of the milling stages passes through all subsequent adjacent milling stages. A central feed opening 12 enables material flow into a primary impact zone 14 of a first milling stage, which 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 has a plurality of apertures 22 through which impacted material of a first size range can pass. A 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 between the first and second screen arrangements.

A separator wheel with hybrid separator wheel vanes, which each consist of at least one vane base body, the radially outward area of which is provided at least on the side, which leads during operation as intended with at least one plating strip made of a wear protection material, which differs from the material of the vane carrier, ideally a carbide material or a ceramic material, which is wherein the at least one plating strip has at least one, preferably several positive-locking elements, which each engages or engage with a corresponding positive-locking element of the vane base body.

A separator wheel with hybrid separator wheel vanes, which each consist of at least one vane base body, the radially outward area of which is provided at least on the side, which leads during operation as intended with at least one plating strip made of a wear protection material, which differs from the material of the vane carrier, ideally a carbide material or a ceramic material, which is wherein the at least one plating strip has at least one, preferably several positive-locking elements, which each engages or engage with a corresponding positive-locking element of the vane base body.

Dynamic crusher for treading fruit, particularly grapes, with a treading chamber having, when considering the direction of the path followed by the fruit in the crusher, an upstream fruit-introduction opening, a downstream discharge opening for discharging the must that results from the treading, a rotary ejector that allows kinetic energy to be imparted to the fruit introduced into the treading chamber, and allows the fruit to be cast against a fixed fruit-bursting wall, wherein the rotary ejector is mounted such that it can rotate about a vertical axis and a fixed fruit-bursting wall is positioned around the rotary ejector or facing the peripheral edge thereof against which fruit is cast, rotation of which allows the fruit to be cast, under the effect of centrifugal force, against the fixed fruit-bursting wall, causing the fruit to burst. A method for dynamically treading fruit using such a crusher is also disclosed.

A vertical shaft impact crusher feed tube arranged for protecting a rotor feeding opening of a feeding funnel of a vertical shaft impact crusher. The feed tube includes a tube portion via which material may flow from the feeding funnel and vertically downwards into a rotor. The tube portion has a first width at a material inlet, and a second width at a material outlet, wherein the second width is larger than the first width.

A vertical shaft impact crusher feed tube arranged for protecting a rotor feeding opening of a feeding funnel of a vertical shaft impact crusher. The feed tube includes a tube portion via which material may flow from the feeding funnel and vertically downwards into a rotor. The tube portion has a first width at a material inlet, and a second width at a material outlet, wherein the second width is larger than the first width.

A pulverizer may have such features as a drum having a top and bottom, a rotating shaft extending vertically in the drum having radially extending arms that create flow currents within the pulverizer to size reduce a material, and a dust collection system coupled to the outlet for extracting air and dust from the size reduced material. The pulverizer may have an ability to detect wrapping as well as possibly deter wrapping. A processor may also adjust the speed of rotation of the arms within the pulverizer and/or the speed of feed of input for various considerations. In fact the rotation direction may be reversed for at least brief periods of time in an effort to remove wrapped material. Vibration may also be sensed and efforts to prevent damage may be instigated by a processor.

A pulverizer may have such features as a drum having a top and bottom, a rotating shaft extending vertically in the drum having radially extending arms that create flow currents within the pulverizer to size reduce a material, and a dust collection system coupled to the outlet for extracting air and dust from the size reduced material. The pulverizer may have an ability to detect wrapping as well as possibly deter wrapping. A processor may also adjust the speed of rotation of the arms within the pulverizer and/or the speed of feed of input for various considerations. In fact the rotation direction may be reversed for at least brief periods of time in an effort to remove wrapped material. Vibration may also be sensed and efforts to prevent damage may be instigated by a processor.

A pulverizer comprising: a housing having top and bottom ends, an inlet located towards the top end for receiving input material to pulverize and an outlet located towards the bottom end for discharging pulverized material from the housing, the housing including a housing sidewall defining an interior chamber and having a central housing axis: a rotatable shaft extending along the central housing axis: a plurality of rotor hub assemblies mounted to the shaft, each rotor hub assembly including a rotor hub and a plurality of rotor arms extending outwardly from the rotor for forming an airflow revolving about the central housing axis within the interior chamber, wherein at least one of the housing and of one or more of the rotor hub assemblies is selectively reconfigurable between a plurality of configurations to adjust at least one parameter of an output flow of the pulverized material at the outlet.

A pulverizer comprising: a housing having top and bottom ends, an inlet located towards the top end for receiving input material to pulverize and an outlet located towards the bottom end for discharging pulverized material from the housing, the housing including a housing sidewall defining an interior chamber and having a central housing axis: a rotatable shaft extending along the central housing axis: a plurality of rotor hub assemblies mounted to the shaft, each rotor hub assembly including a rotor hub and a plurality of rotor arms extending outwardly from the rotor for forming an airflow revolving about the central housing axis within the interior chamber, wherein at least one of the housing and of one or more of the rotor hub assemblies is selectively reconfigurable between a plurality of configurations to adjust at least one parameter of an output flow of the pulverized material at the outlet.