Abstract: A jaw crusher has frame side walls, a rear end connected to the side walls, an eccentric supported by the side walls, a pitman supported by the eccentric, a toggle plate connected between the pitman and a middle section of the rear end including a cross wall. The rear end has a rear end support connected to the cross wall and located on a center plane of the cross section of the rear end. An upper and lower rear cross beams are fixed to the side walls. The upper and lower rear cross beams each have a vertical wall and horizontal ribs connected to the vertical wall. A crushing plant is also disclosed with a body and the jaw crusher mounted on the body.

Abstract: A mineral material crusher and method of operating a mineral material crusher that includes: a body, a rotating crusher element, a drive shaft arrangement that supports the rotating crusher element to the body and to rotate the rotating crusher element, and a motor including a rotor for driving the drive shaft arrangement. The motor is formed inside the rotating crusher element and the drive shaft arrangement is configured to form of the rotor a rotating axle that is rigidly coupled with the rotating crusher element and capable of leading torque from the rotor to the rotating crusher element for rotating the crusher element around the drive shaft.

Abstract: A mineral material processing plant includes a frame and a screen which is supported on the frame of the processing plant, and a conveyor which is fixed in connection with the screen for transporting material to be processed by the screen. The support of the conveyor relative to the screen includes a four-bar linkage mechanism, and pivot points of the four-bar linkage mechanism are arranged in support arms which are fixed pivotably in connection with the screen, and the conveyor is arranged to be moved further from the screen and closer to the screen by the movement of the four-bar linkage. A method for operating a processing plant is also disclosed.

Abstract: A feed apparatus for feeding mineral material includes a first frame, a feed box fixed to the first frame and having walls for the mineral material to be loaded to the apparatus, and a feed device joined to the first frame so that the material ends up onto a transport surface of a transport member of the feed device. The transport surface and a bottom edge of the wall of the feed box form a gap therebetween. The feed apparatus includes distance adjustment members to move the transport surface and the bottom edge relative to each other. Preferably the distance adjustment members are pivoted on the first frame and the feed device. A method for adjusting the feed apparatus includes moving the transport surface of the feed device and the bottom edge of the wall of the feed box relative to each other by distance adjustment members.

Abstract: A method for controlling the operation of a crusher, a mineral material processing plant and a control system. The method including measuring a quantity related to stress to which the crusher is exposed during the crushing of material, determining a deviation value of the quantity related to stress, comparing the determined deviation value to a reference deviation value, and in response to the deviation value differing from the reference deviation value, adjusting a default setting of the quantity related to stress.

Abstract: A system for recovering antifreeze from a dust prevention system of a mineral material processing plant, wherein the system includes an antifreeze tank, a pump configured to circulate water and/or antifreeze, a first valve configured to connect to a water inlet and/or antifreeze tank to the pump, a nozzle manifold connected to the pump, a second valve configured to connect the nozzle manifold to the antifreeze tank and/or a third valve, and a control system. The control system is configured to operate the system according to a method including the steps of sucking water using a pump from a water inlet via a first valve, displacing the antifreeze via a nozzle manifold into an antifreeze tank until the water reaches a second valve, and connecting the second valve to a third valve to allow circulation of water in the system.

Abstract: A maintenance platform of a jaw crusher having an adapter part that engages a first wear part when in place in a jaw crusher cavity. The platform includes a support part that engages a second wear part when the maintenance platform is in the jaw crusher cavity. The platform further includes a platform part residing between the adapter part and the support part. The platform part has a face section that engages the adapter part and a central section that extends apart from the face section towards the support part. The platform part defines at least two grooves each extending from the central section to the face section. The adapter part joins to the platform part by hand screws or nuts through the grooves. The grooves are shaped such that the platform part is separable from the adapter part after untightening while maintaining in place the hand screws or nuts.

Abstract: A crusher is disclosed having a rotatable eccentric, a main shaft supported to the eccentric, a piston for adjusting the vertical position of the main shaft and an axial thrust bearing between the lower end of the main shaft and the piston. The thrust bearing has an upper bearing attached to the lower end of the main shaft, a lower bearing attached to the piston, and a pressure plate between the upper bearing and the lower bearing. A circular groove or expansion is formed onto the pressure plate. A releasing member is attached to a crusher structure outside of the pressure plate. The releasing member has a circular lip directed to the direction of the pressure plate. Part of the lip is in the groove or above the part of the extension. The releasing member is attached to the piston.

Abstract: A method is described for adjusting the tightness of a wear part fastened to a fixed jaw and/or a moving jaw of a jaw crusher with a tightening device that has a screw fastened at its first end in connection with a wear part located on a first side of the jaw; and a tightening member fastened to a second end of the screw on a second side of the jaw; and a spring arranged between the jaw and the tightening member. The spring is compressed or decompressed with the tightening member; the spring is influenced by at least two moving screws supported by a frame of the tightening member. The length of the spring is changed by rotating the at least two moving screws.

Abstract: A method for compressing or decompressing a spring loading a tie rod in a jaw crusher. The tie rod is supported by, at one location, a pendulum of the jaw crusher and, at another location, the jaw crusher's frame through the said spring. The spring is installed between the jaw crusher's frame and a second spring support supported by the tie rod; and the second spring support is moved in relation to the tie rod. A support part of the tightening device and at least two moving screws supported by the support part are arranged to influence the second spring support. The support part is supported by the tie rod through a locking member; and the at least two moving screws supported by the support part are moved to change the distance between the second spring support and the support part.

Abstract: A jaw crusher including a fixed jaw and a movable jaw for forming a crushing chamber therebetween which is open at the top, the fixed jaw including a first wear part mounted thereto and the movable jaw including a pitman and a second wear part mounted thereto. The crushing chamber includes an upper section, a middle section, and a lower section having equal heights (h). The pitman is bearing-mounted to an eccentric shaft and to at least one slide member. The at least one slide member is configured to slide in a direction substantially perpendicular to the vertical diagonal of the crushing chamber. A method for crushing mineral material in a jaw crusher or a crushing plant is also disclosed.

Abstract: A mineral material processing plant includes a mineral material processing apparatus and a first conveyor which is arranged to feed the processing apparatus during operation of that processing apparatus. The first conveyor includes a first material transport part, a second material transport part and a pivot by which the second material transport part is fixed in relation to the first material transport part. The first conveyor is pivotable to an operation position in which the transported material is arranged to be fed via a discharge end of the second material transport part to the processing apparatus and to a service position which is in a first pivoting direction in relation to the operation position. In the service position, the projection of the discharge end of the second material transport part is arranged to leave free the lifting centre of the processing apparatus when viewed from above. A method for operating a processing plant is also disclosed.

Abstract: A mineral material processing plant includes a flame; a crusher; a centrifugal conveyor; and a first conveyor; and the centrifugal conveyor includes a first idler drum and a second idler drum and a main conveyor belt surrounding the idler drums, a pivot and a folding head which is pivotable around the pivot; and the folding head includes a movable frame to which the second idler drum is bearing-mounted, to connect the centrifugal conveyor in material transport connection with the first conveyor and away from said material transport connection. A pivot point of the pivot is located in a region inside the circumference of the main conveyor belt. A method for operating a processing plant is also disclosed.

Abstract: A conveyor body for conveying mineral material includes a middle section having a first end and a second end, and a first pivot axis passes through the first end of the middle section, and the middle section is arranged to be pivoted around the first pivot axis from an operation position of the conveyor to a transport position and back to the operation position, and a second pivot axis passes through the second end of the middle section to pivot a head section sideways around the second pivot axis from the operation position of the conveyor which head section is connectable to the middle section through the second pivot axis, wherein the middle section includes a top plate, a bottom plate, and vertical side plates which are fixed between the top plate and the bottom plate. A mineral material processing plant is also disclosed.

Abstract: A crusher for crushing mineral material, a method for decreasing twisting of a pitman in a crusher and a mineral material processing plant. The crusher includes a fixed crushing element and a pitman as a crushing element configured to be movable. The crusher includes at least two hydraulic cylinders and a piston in each hydraulic cylinder and a piston rod attached to the piston and extending through a first end of the hydraulic cylinder and being in connection with the movable crushing element. The crusher includes a hydraulic fluid connecting channel between the at least two hydraulic cylinders which connecting channel is connected to a hydraulic fluid space of the hydraulic cylinder to be pressurized by the crushing force. The connecting channel is dimensioned so that the diameter of the hydraulic fluid space of said hydraulic cylinder is at least 25 times larger than the diameter of the connecting channel.

Abstract: A mineral material processing plant includes a frame and a screen which is supported on the frame of the processing plant, and a conveyor which is fixed in connection with the screen for transporting material to be processed by the screen. The support of the conveyor relative to the screen includes a four-bar linkage mechanism, and pivot points of the four-bar linkage mechanism are arranged in support arms which are fixed pivotably in connection with the screen, and the conveyor is arranged to be moved farther from the screen and closer to the screen by the movement of the four-bar linkage. A method for operating a processing plant is also disclosed.

Abstract: A mineral material processing plant includes a frame, and a crusher and a screen which are supported on the frame, and a conveyor which is, in an operation position, arranged to discharge material which is fed into the plant to said crusher or screen. The conveyor includes separate first conveyor and second conveyor which are connectable successively to a transport connection, and the first conveyor is arranged to be moved to a transport position mainly to a first side of the crusher, and the second conveyor is fixed above the screen to be moved with the screen to the transport position mainly to a second side of the crusher. A method for operating a processing plant is also disclosed.

Abstract: A vibrating aggregate for moving the processing device, the vibrating aggregate including at least a frame, a shaft having an axial line and being arranged to rotate with respect to the frame, as well as a first element connected to the shaft in such a way that the center of mass of the element is not on the axial line, and fitted to move along a circular path. The vibrating aggregate also comprises a second element coupled to the shaft and arranged to move along a linear path. Furthermore, the invention relates to an apparatus for processing mineral material, and a method for moving the processing device of an apparatus for processing mineral material.

Abstract: A method and a system for supporting a frame of a mineral material crusher on a body of a crushing plant and a mineral material processing plant. The crusher frame is supported by first support devices in place in relation to the body of the crushing plant at first support points and by at least two second support devices at second support points. The second support device has an adjusting member between the crusher frame and the body of the crushing plant, and at least one second support device is configured to move the frame of the crusher vertically in relation to the body of the crushing plant. The adjusting member has a cylinder and a piston inside the cylinder which define an adjusting volume therebetween. A pressure is formed from a load above the adjusting member and is arranged to form into the adjusting volumes of the adjusting members.

Abstract: A mineral material processing plant includes a frame having two or more upper support surfaces and a jaw crusher including a crusher body having at least two bottom support surfaces at a distance from each other. The processing plant further includes at least one damper to be arranged in between the bottom and upper support surfaces which damper includes a first counter surface for the bottom support surface and a second counter surface for the upper support surface and an elastic material layer between the counter surfaces and preferably a slide joint between the first counter surface and the bottom or upper support surface. A method for damping a jaw crusher in a mineral material processing plant is also disclosed.