A pulverizer is provided having a top having an inlet and a bottom having an outlet. A modular drum has a drum housing wall with a plurality of planar panel portions extending between the top and the bottom and connected together. A drum liner is disposed inside the drum housing wall, the drum liner including a plurality drum liner portions to attached to the planar panel portions, each drum liner portion being at least partially planar and extending along a corresponding planar panel portion, each drum liner portion being detachable from the planar panel portion independently from the other drum liner portions. A rotating shaft is mounted within the modular drum and has radially extending arms creating flow currents within the pulverizer for reducing a size of product input fed into the inlet and producing a size reduced material that is discharged through the outlet.

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.

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.

A device and a method for rounding a graphite material including a feeding device for feeding the graphite material to the device; a plurality of rounding tools designed to revolve while rotating, which are arranged at the outer circumference of a disc rotating about a rotational axis and in a rotational direction; at least one guide apparatus); a separating device for separating fine material and superfine material and a product outlet. Furthermore, provision is made such that a cover ring is arranged above the rounding tools.

The present invention relates to a device for treatment of a material mixture consisting of substitute fuel and impurities, having a vertically aligned central feeder (1), a separating unit (2) arranged underneath the central feeder (1), a rotor mill (3), wherein the rotor mill (3) is arranged above the separating unit (2) and surrounds the central feeder (1), a flow device (4) for generating an upwardly directed gas flow, wherein the rotor mill (3) has a multistage design, and a respective separating device (6) is arranged between the stages (5.1, 5.2) of the rotor mill (3), wherein material mixture not held back by the separating device (6) is further comminuted in the following stage (5.2).

The present invention relates to a device for treatment of a material mixture consisting of substitute fuel and impurities, having a vertically aligned central feeder (1), a separating device (2) arranged underneath the central feeder (1), a rotor mill (3), wherein the rotor mill (3) is arranged above the separating device (2) and surrounds the central feeder (1), a flow device (4) for generating an upwardly directed gas flow, wherein the rotor mill (3) has several tools (8a, 8b) arranged offset relative to each other vertically and in the circumferential direction.

A system is disclosed. The system includes an impact processor comprising an inlet and an outlet, a secondary classifier comprising an inlet and an outlet, the secondary classifier being downstream of and coupled to the impact processor, a recirculation mixer valve downstream of and coupled to the outlet of the secondary classifier, and a recirculation line coupling the outlet of the first secondary classifier to the inlet of the impact processor.

A system is disclosed. The system includes an impact processor comprising an inlet and an outlet, a secondary classifier comprising an inlet and an outlet, the secondary classifier being downstream of and coupled to the impact processor, a recirculation mixer valve downstream of and coupled to the outlet of the secondary classifier, and a recirculation line coupling the outlet of the first secondary classifier to the inlet of the impact processor.

A method for preheating a beater mill is provided. The method includes: rotating a beater wheel disposed within the beater mill to facilitate circulation of a gas stream between the beater mill and a furnace fluidly connected to each other via both a pulverized fuel conduit and a flue gas recirculation conduit; generating a burner gas via a burner disposed within the flue gas recirculation conduit such that the burner gas joins and heats the gas stream circulating through the beater mill and the furnace; and adjusting at least one of an air supply and a fuel supply to the burner via a controller based at least in part on one of a temperature of the gas stream at an entrance of the beater mill, a temperature of the gas stream at an exit of the beater mill, and an oxygen level within the beater mill.

A method for preheating a beater mill is provided. The method includes: rotating a beater wheel disposed within the beater mill to facilitate circulation of a gas stream between the beater mill and a furnace fluidly connected to each other via both a pulverized fuel conduit and a flue gas recirculation conduit; generating a burner gas via a burner disposed within the flue gas recirculation conduit such that the burner gas joins and heats the gas stream circulating through the beater mill and the furnace; and adjusting at least one of an air supply and a fuel supply to the burner via a controller based at least in part on one of a temperature of the gas stream at an entrance of the beater mill, a temperature of the gas stream at an exit of the beater mill, and an oxygen level within the beater mill.