The application relates to a double acting demolition device according to one embodiment for demolishing structures. The device includes a first crushing jaw for crushing operation, a first cutting jaw for cutting operation, and a combination jaw. The first jaws are separate jaws. The combination jaw is attachable to the first cutting jaw for constructing a second crushing jaw and to the first crushing jaw for constructing a second cutting jaw. The second crushing jaw is used jointly with the first crushing jaw in crushing operation and the second cutting jaw is used jointly with the first cutting jaw in cutting operation. In crushing operation, the first crushing jaw rotates around a fulcrum other than that of the second cutting jaw in cutting operation.

The application relates to a double acting demolition device according to one embodiment for demolishing structures. The device includes a first crushing jaw for crushing operation, a first cutting jaw for cutting operation, and a combination jaw. The first jaws are separate jaws. The combination jaw is attachable to the first cutting jaw for constructing a second crushing jaw and to the first crushing jaw for constructing a second cutting jaw. The second crushing jaw is used jointly with the first crushing jaw in crushing operation and the second cutting jaw is used jointly with the first cutting jaw in cutting operation. In crushing operation, the first crushing jaw rotates around a fulcrum other than that of the second cutting jaw in cutting operation.

A replaceable work part which has a base and a tooth portion provided on an upper side of the base. A plurality of mounting legs extend downward from the base. Each mounting leg defines a recess and is configured to engage a corresponding mounting structure formed on a jaw of the jaw assembly. The replaceable work part is mounted to the jaw by being inserted into the same from above and sliding the same onto the jaw in a sliding direction to engage the mounting legs with the mounting structures of the jaw. In this state, locking members are inserted between the replaceable work part and the jaw and secured to the replaceable work part to restrict movement of the replaceable work part in the direction opposite to the mounting direction.

A replaceable work part which has a base and a tooth portion provided on an upper side of the base. A plurality of mounting legs extend downward from the base. Each mounting leg defines a recess and is configured to engage a corresponding mounting structure formed on a jaw of the jaw assembly. The replaceable work part is mounted to the jaw by being inserted into the same from above and sliding the same onto the jaw in a sliding direction to engage the mounting legs with the mounting structures of the jaw. In this state, locking members are inserted between the replaceable work part and the jaw and secured to the replaceable work part to restrict movement of the replaceable work part in the direction opposite to the mounting direction.

A crusher assembly for a jaw crusher having a swing jaw and a crusher jaw having teeth formed on the breaking sides thereof, the crusher jaw comprising end faces at the opposite ends thereof, wherein a clamping piece having a clamping surface acts on the one end face (35) and the other end face (35) is supported on a clamping piece, wherein the clamping piece and the clamping element are interchangeably connected to the swing jaw, wherein the swing jaw comprises a head part having a pivot bearing on the end region thereof facing away from the clamping piece, and wherein the crusher jaw at least partially covers the region of the swing jaw in front of the pivot bearing.

A crusher assembly for a jaw crusher having a swing jaw and a crusher jaw having teeth formed on the breaking sides thereof, the crusher jaw comprising end faces at the opposite ends thereof, wherein a clamping piece having a clamping surface acts on the one end face (35) and the other end face (35) is supported on a clamping piece, wherein the clamping piece and the clamping element are interchangeably connected to the swing jaw, wherein the swing jaw comprises a head part having a pivot bearing on the end region thereof facing away from the clamping piece, and wherein the crusher jaw at least partially covers the region of the swing jaw in front of the pivot bearing.

The present disclosure relates to a method for producing polycrystalline silicon fragments. The process includes (a) providing a polycrystalline silicon rod, (b) working the surface of the silicon rod by means of a hammer or needle hammer to remove at least a portion of a layer of the surface of the polycrystalline silicon rod, and (c) reducing the silicon rod to fragments. Wherein an amount of impact energy expended by the hammer and/or needle hammer is from 1 J to 15 J.

The present disclosure relates to a method for producing polycrystalline silicon fragments. The process includes (a) providing a polycrystalline silicon rod, (b) working the surface of the silicon rod by means of a hammer or needle hammer to remove at least a portion of a layer of the surface of the polycrystalline silicon rod, and (c) reducing the silicon rod to fragments. Wherein an amount of impact energy expended by the hammer and/or needle hammer is from 1 J to 15 J.

A wear part for a jaw crusher comprises at a first side a wear surface to be directed to a crushing chamber of the crusher; and at an opposite second side a first counter surface which is fixable against a fixed or movable jaw of the crusher in a detach-able manner. The wear part comprises second counter surfaces inclined in opposite directions, for holding the wear part in place vertically and in a centering way in side direction relative to the jaw. A jaw crusher, a mineral material processing plant and a method for fixing a wear part to a jaw of a jaw crusher in a detachable manner. A wedge tightening coming from three directions is locking the wear part in a centering way in place relative to any possible transfer direction.

A wear part for a jaw crusher comprises at a first side a wear surface to be directed to a crushing chamber of the crusher; and at an opposite second side a first counter surface which is fixable against a fixed or movable jaw of the crusher in a detach-able manner. The wear part comprises second counter surfaces inclined in opposite directions, for holding the wear part in place vertically and in a centering way in side direction relative to the jaw. A jaw crusher, a mineral material processing plant and a method for fixing a wear part to a jaw of a jaw crusher in a detachable manner. A wedge tightening coming from three directions is locking the wear part in a centering way in place relative to any possible transfer direction.