A method and apparatus for grinding a particulate material is disclosed. The method may include providing a system including a roller mill apparatus and a hammermill apparatus, operating the roller mill apparatus and the hammermill apparatus, adjusting a feed rate of particulate material to the roller mill apparatus until power consumption by operation of the roller mill apparatus achieves a target power consumption for the roller mill apparatus, and adjusting a gap between mill rolls of the roller mill apparatus until power consumption by operation of the hammermill apparatus achieves a target power consumption for the hammermill apparatus. The system may include roller and hammermill apparatus with sensing and controlling apparatus configured to operate the roller and hammermill apparatus according to the methods disclosed.

A vacuum cylinder shredder for lawn debris using at least one string trimmer assembly and a collection mat.

A method for controlling a crusher having a crushing tool and a vibratory conveyor (1) having a drive (5), includes capturing bulk material (2) in a capture region (4) using a sensor (3). So that, in the case of grains with an inhomogeneous grain size distribution, even large grains can be crushed with a constant crushing result without a risk of the crusher being damaged, an effective diameter d.sub.eff, which results from the largest diameter d.sub.max and the direction (9) thereof, transverse to the conveying direction (8) of a grain of the bulk material (2) is determined as the controlled variable in the capture region (4). If the effective diameter d.sub.eff exceeds a predefined power threshold value, the power of the crushing tool is increased and/or, if the effective diameter d.sub.eff exceeds a predefined switch-off limit value, the drive (5) is switched off.

A crusher includes a housing having an inlet and an outlet at opposite axial sides, an impeller positioned proximate the inlet of the housing, a shaft connected to the impeller and extending axially through the housing between the inlet and the outlet, at least two spaced apart support structures holding the shaft in the housing, a plurality of dynamic blades extending outwardly from the shaft, and a plurality of fixed blades extending radially inward from an inner wall of the housing and alternatingly positioned between the dynamic blades.

A vacuum grinding system having multiple elements connected in series. The elements include an input chamber next to the system input, which chamber can be fluidically connected to a vacuum pump; a grinding chamber which is arranged downstream of the input chamber and which can be fluidically connected to a vacuum pump; and an output chamber, downstream of the grinding chamber and next to the output system, which output chamber can also be fluidically connected to a vacuum pump.

A hopper and a mineral material processing plant. The hopper includes hinged side walls configured to be pivoted into a first position and a second position and a connection wall attached between the hinged side walls. The connection wall includes a flexible member and is configured to fold together in response to the hinged side walls being pivoted from the first position to the second position.

A conveying arrangement conveys loose material in a conveying direction, in particular agricultural material. Several knives of a cutting assembly are mounted below a cutting area guiding surface. The material is first conveyed along the cutting area guiding surface and afterwards along a further guiding surface. Both guiding surfaces are mechanically supported by a connecting assembly. A positioning mechanism can pivot the connecting assembly upwards and downwards. This pivotal movement causes both guiding surfaces to be moved upwards and downwards. The cutting area guiding surface together with the cutting assembly can be shifted laterally, i.e. perpendicular to the conveying direction, and is guided during this lateral movement.

A chip separator configured to disentangle clusters of chips in a collection tank is disclosed. The chip separator includes a horizontal plate having a first surface and a second surface opposite the first surface, a motor assembly coupled to the first surface of the horizontal plate; and a pulverizer operably coupled to the motor assembly and disposed away from the second surface of the horizontal plate by a distance. The pulverizer includes a base plate and a plurality of pulverizer attachments operably coupled to the base plate. The motor assembly is configured to rotate the pulverizer such that the plurality of pulverizer attachments of the pulverizer disentangles clusters of chips disposed in the collection tank.

A pulverizer for reducing a size of input material particles having a housing, a rotatable shaft with rotor arms and at least one airflow deflector cooperating with the rotor arms to deflect airflow within the pulverizer so as to form at least two overlapping vortices within the interior chamber such that input material particles in suspension in both overlapping vortices collide with each other to be thereby pulverized. The pulverizer also having a housing liner including a plurality of housing liner portions attached to and extending along a outer structural wall of the housing. The pulverizer also having a housing sidewall having an outer structural wall with a plurality of wall sections. The pulverizer also having canted rotor arms and rotor arms with removable wear pads. An anti-caking device for a vessel such as a pulverizer is also provided.

A chip separator configured to disentangle clusters of chips in a collection tank is disclosed. The chip separator includes a horizontal plate having a first surface and a second surface opposite the first surface, a motor assembly coupled to the first surface of the horizontal plate; and a pulverizer operably coupled to the motor assembly and disposed away from the second surface of the horizontal plate by a distance. The pulverizer includes a base plate and a plurality of pulverizer attachments operably coupled to the base plate. The motor assembly is configured to rotate the pulverizer such that the plurality of pulverizer attachments of the pulverizer disentangles clusters of chips disposed in the collection tank.