Abstract: The invention relates to a handling apparatus for handling a roller of a roller crusher. The handling apparatus comprises a movable base, a carrier pivotably attached to said base and adapted to carry the roller, at least one carrier pivoting device pivotably attached to said base and attached to said carrier, said carrier pivoting device being extendable, and at least one roller pivoting device pivotably connected to said base, said roller pivoting device being adapted to releasably engage said roller. The invention also relates to a method for mounting a roller to a roller crusher and a method for dismounting a roller to a roller crusher.

Abstract: A device and method for maintenance of a grinding mill. The device includes a movable maintenance tool for maintenance inside said grinding mill, and at least one attachment element adapted to be connected to a fixed point (P) in relation to said grinding mill for attaching said device to said fixed point (P).

Abstract: The invention relates to an energy harvester for converting vibrational motion of a vibrating equipment into electrical energy. The energy harvester comprises a pendulum arranged to be pivotably attached to said vibrating equipment, a motion limiter arranged to limit a pivoting motion of said pendulum, and a generator connected to said pendulum and arranged to convert said pivoting motion into electrical energy. The vibrational motion has an operating frequency, and said pendulum has a natural frequency different from said operating frequency. The invention also relates to a device for monitoring the operation of a vibrating equipment.

Abstract: A two-piece locking nut assembly for securing a mantle to a head assembly of a cone crusher. The two-piece locking nut assembly includes an inner nut and an outer nut. The inner nut includes a set of axial bores that each receive a jackscrew. Once the locking nut assembly is in position on the head assembly, the series of jackscrews are tightened to exert a force on the mantle that is counteracted by forces through the inner nut and into the head to create a locking force between the locking nut assembly and the head assembly. The outer nut is turned along the inner nut to hold the locking nut assembly in place. Once the outer nut is moved into position, the jackscrews are removed such that the outer nut continues to apply the locking force between the mantle and the head through the locking nut assembly.

Abstract: A grinding assembly for the comminution of material that enhances the durability of the side edges of both a grinding roll and a flange roll. Both the grinding roll and the flange roll include a wear ring that is received within a side groove formed at each end of a cylindrical roll body. The wear ring includes a series of spaced receiving cavities that each receive a wear member. Each wear member includes a radially outer surface and an axial end face to enhance the durability of the edge of the roll body. The edge ring is retained on the roll body by a series of connectors that pass through the edge ring. In the flange roll design, a flange ring is attached to the roll body by a series of connectors that also secure the edge ring to the roll body.

Abstract: A grinding mill comprising an essentially horizontally oriented, rotatable drum, a support bearing supporting the drum, and a riding ring connecting the drum to the support bearing is provided. The drum has a circumferential wall having a first end and a second end, a first end wall arranged at the first end of the circumferential wall, and a second end wall arranged at the second end of the circumferential wall. The riding ring is integrally formed with the first end wall.

Abstract: The present invention relates to a roller crusher having two generally parallel rotatable rollers separated by a gap, and a feeding arrangement for feeding material to the rollers. The roller crusher includes a base frame and a first and a second roller frame section, each of the first and second roller frames sections being pivotably connected to the base frame and arranged for carrying one of the rollers in bearings arranged at opposed ends of each roller. The roller crusher also includes at least one balancing cylinder extending between one of the roller frame sections and the base frame such that when the at least one balancing cylinder is activated, the interconnected roller frame sections will pivot relative to the base frame, thus adjusting the position of the rollers relative to the base frame.

Abstract: The present invention relates to a roller crusher having a base frame and a roller frame movably connected to the base frame. Two generally parallel rotatable rollers separated from each other by a gap are arranged in the roller frame. The roller crusher further includes a feeding arrangement mounted to the base frame for feeding material to the rollers and at least one balancing cylinder is provided which are connected to and arranged to manipulate the roller frame relative to the base frame such that the position of the rollers relative to the feeding arrangement can be adjusted. Front and rear cheek plates are provided at the roller frame partially covering front and rear end surfaces of one of the rollers and at least partially covering an opening between the feeding arrangement and the two rollers, the cheek plates being fixedly mounted to the roller frame.

Abstract: A stirred mill comprises a container for containing grinding media and a material to be ground. The container has a longitudinal axis, and an agitator arranged in said container along said longitudinal axis. A restrictor plate is arranged in said container, extending across said longitudinal axis, and arranged to be positioned on top of the grinding media. A method of simulating a grinding process of a stirred mill of a first height in a stirred mill of a second height is also disclosed, wherein said second height is less than said first height. Further, a method of grinding material in a stirred mill is disclosed.

Abstract: The invention relates to a handling apparatus for handling a roller of a roller crusher. The handling apparatus comprises a movable base, a carrier pivotably attached to said base and adapted to carry the roller, at least one carrier pivoting device pivotably attached to said base and attached to said carrier, said carrier pivoting device being extendable, and at least one roller pivoting device pivotably connected to said base, said roller pivoting device being adapted to releasably engage said roller. The invention also relates to a method for mounting a roller to a roller crusher and a method for dismounting a roller to a roller crusher.

Abstract: The present invention relates to a roller crusher having two generally parallel rotatable rollers separated by a gap, and a feeding arrangement for feeding material to the rollers. The roller crusher further comprising a base frame and a first and a second roller frame section, each of the first and second roller frames sections being pivotably connected to the base frame and arranged for carrying one of the rollers in bearings arranged at opposed ends of each roller. The roller crusher also comprises at least one balancing cylinder extending between one of the roller frame sections and the base frame such that when the at least one balancing cylinder is activated, the interconnected roller frame sections will pivot relative to the base frame, thus adjusting the position of the rollers relative to the base frame.

Abstract: A method of protecting a roller crusher, having two rollers separated by a gap, from uncrushable objects is disclosed. The method comprises the steps of: detecting an uncrushable object in an in-feed stream of material, opening a gap between said rollers to a by-pass width, which is significantly larger than an operational width, such that said uncrushable object is permitted to pass through said gap, restricting an in-feed to said gap, such that material is fed to said gap at a restricted in-feed rate, determining that said uncrushable object has passed through said gap, reducing said gap to said operational width, and opening said in-feed to said gap, such that material is fed to said gap at an operational in-feed rate. A roller crusher having a protective system for protecting the roller crusher from uncrushable objects is also disclosed.

Abstract: A grinding assembly for the comminution of material that enhances the durability of the side edges of both a grinding roll and a flange roll. Both the grinding roll and the flange roll include a wear ring that is received within a side groove formed at each end of a cylindrical roll body. The wear ring includes a series of spaced receiving cavities that each receive a wear member. Each wear member includes a radially outer surface and an axial end face to enhance the durability of the edge of the roll body. The edge ring is retained on the roll body by a series of connectors that pass through the edge ring. In the flange roll design, a flange ring is attached to the roll body by a series of connectors that also secure the edge ring to the roll body.

Abstract: The invention relates to a roller crusher of the type which comprises a pair of crushing rollers is provided. The crushing rollers are generally parallel to one another and rotate in opposite directions, each roller including a shaft which has end portions, mounted in respective roller bearings. The roller crusher comprises a feeding arrangement for feeding material to be crushed to a crushing zone of the roller crusher. The roller crusher is characterized in that it further comprises a dust protecting enclosure enclosing the crushing zone, the dust protecting enclosure having an inlet opening upstream of the crushing zone and in communication with said feeding arrangement, and an outlet opening downstream of the crushing zone, and in that the roller bearings are arranged outside of the dust protecting enclosure.

Abstract: The present invention relates to a roller crusher having a base frame and a roller frame movably connected to said base frame. Two generally parallel rotatable rollers separated from each other by a gap are arranged in said roller frame. The roller crusher further comprises a feeding arrangement mounted to the base frame for feeding material to the rollers and at least one balancing cylinder is provided which are connected to and arranged to manipulate the roller frame relative to the base frame such that the position of the rollers relative to the feeding arrangement can be adjusted. Front and rear cheek plates are provided at the roller frame partially covering front and rear end surfaces of one of the rollers and at least partially covering an opening between the feeding arrangement and the two rollers, the cheek plates being fixedly mounted to the roller frame.

Abstract: A method of protecting a roller crusher, having two rollers separated by a gap, from uncrushable objects is disclosed. The method includes the steps of: detecting an uncrushable object in an in-feed stream of material, opening a gap between the rollers to a by-pass width, which is significantly larger than an operational width, such that the uncrushable object is permitted to pass through the gap, restricting an in-feed to the gap, such that material is fed to the gap at a restricted in-feed rate, determining that the uncrushable object has passed through the gap, reducing the gap to the operational width, and opening the in-feed to the gap, such that material is fed to the gap at an operational in-feed rate. A roller crusher having a protective system for protecting the roller crusher from uncrushable objects is also disclosed.

Abstract: A two-piece locking nut assembly for securing a mantle to a head assembly of a cone crusher. The two-piece locking nut assembly includes an inner nut and an outer nut. The inner nut includes a set of axial bores that each receive a jackscrew. Once the locking nut assembly is in position on the head assembly, the series of jackscrews are tightened to exert a force on the mantle that is counteracted by forces through the inner nut and into the head to create a locking force between the locking nut assembly and the head assembly. The outer nut is turned along the inner nut to hold the locking nut assembly in place. Once the outer nut is moved into position, the jackscrews are removed such that the outer nut continues to apply the locking force between the mantle and the head through the locking nut assembly.

Abstract: A cone crusher includes a stationary main shaft and an eccentric that rotates about the main shaft to cause gyrational movement of a head assembly to crush rock within a crushing gap. The cone crusher includes a counterweight assembly mounted for rotation with the eccentric. The counterweight assembly includes a counterweight body having a series of tanks. Each tank can receive either a first ballast and a second ballast or a combination thereof. The first ballast is formed from a material having higher density than the second ballast to increase the concentration of weighting in desired locations around the counterweight assembly.

Abstract: A two-piece locking nut assembly for securing a mantle to a head assembly of a cone crusher. The two-piece locking nut assembly includes an inner nut and an outer nut. The inner nut includes a set of axial bores that each receive a jackscrew. Once the locking nut assembly is in position on the head assembly, the series of jackscrews are tightened to exert a force on the mantle that is counteracted by forces through the inner nut and into the head to create a locking force between the locking nut assembly and the head assembly. The outer nut is turned along the inner nut to hold the locking nut assembly in place. Once the outer nut is moved into position, the jackscrews are removed such that the outer nut continues to apply the locking force between the mantle and the head through the locking nut assembly.

Abstract: A cone crusher includes a stationary main shaft and an eccentric that rotates about the main shaft to cause gyrational movement of a head assembly to crush rock within a crushing gap. The cone crusher includes a counterweight assembly mounted for rotation with the eccentric. The counterweight assembly includes a counterweight body having a series of tanks. Each tank can receive either a first ballast and a second ballast or a combination thereof. The first ballast is formed from a material having higher density than the second ballast to increase the concentration of weighting in desired locations around the counterweight assembly.