Abstract: An outlet cover with a first attachment pin fixed with respect to the outlet cover and having a radially extendable portion deformable upon by a radial force exerted from a hollow inside of the first attachment pin. The radially deformable portion prevents the first attachment pin from being withdrawn from an associated attachment hole, while allowing the first attachment pin to be compressed further into the associated attachment hole, thereby preventing a securing element from stripping any retaining surface, and thus increasing the longevity of the outlet cover. An associated filter plate, filter plate assembly and a filter are also concerned.

Abstract: A sealing strip for sealing adjacent filter plate assemblies of a horizontal filter press. The disclosure is based on the idea of providing the sealing strip with a stiffener at a base portion of the sealing strip, positioned such that it intersects with a line running through a ridge provided on a distal portion of the sealing strip and extending along a vertical direction, perpendicular to both the length direction and the width direction of the sealing strip, as seen along the cross-sectional profile of the sealing strip. A filter frame, a filter frame assembly and a filter apparatus having such a sealing strip are also provided.

Abstract: A filter plate frame assembly and a horizontal filter press, in which accidental over pressurization of the filter diaphragm is prevented. A filter plate frame assembly having a separate subframe is provided with a limited vertical travel with respect to the filter frame and the filter plate, such that the subframe is allowed to drop away from the filter plate when the filter chamber is opened. This enables a diaphragm to be attached to the subframe such that an escape route is formed for a pressurized medium accidentally introduced between the filter plate and the diaphragm. Moreover, the limited travel of the subframe allows the subframe to be pressed towards the filter plate when the filter chamber is closed, thereby allowing normal operation of the diaphragm for squeezing a filter cake.

Abstract: A method and a system for treating fluid. The method includes a fluid feeding step for feeding fluid in a fluid feeding pipe into a fluid reactor vessel, a bubbles feeding step for feeding bubbles of first fluid mixture containing first carrier fluid and first active fluid into fluid flowing in the fluid feeding pipe by means of a sparger apparatus. The method includes a fluid mixture analyzing step for measuring the relative content of first active fluid in the first fluid mixture with a first fluid analyzer and controlling a first active fluid source with the first fluid analyzer in response to the relative content of first active fluid in the first fluid mixture as measured by the first fluid analyzer.

Abstract: A mobile mineral material processing station has a mobile platform having tracks or wheels or a skids for supporting or forming a body that supports in line, in a transport configuration: a feed conveyor; a screen frame and a multi-layer screen; first and second exit conveyors; and a third exit conveyor on top of the first and second exit conveyors. The first exit conveyor turns from a transport position, under the third exit conveyor, to a first operation direction, onto a first side of the station, for operating the station, and back. The second exit conveyor turns from a transport position, under the third exit conveyor, to a second operation direction onto a second side of the station, opposite to the first side, and back.

Abstract: A filter diaphragm for a horizontal plate and frame-type filter, such as a tower press, including a sheet like body and at least on a filter plate-facing side thereof, a continuous seal bead. The seal bead includes an inner seal lip on a lateral inside of the seal bead and an outer seal lip surrounding the inner seal lip on a lateral outside of the seal bead. The outer seal lip is elevated from the inner seal lip in a vertical direction perpendicular to a general plane defined by the diaphragm.

Abstract: A mobile multi-deck screening apparatus receives material for screening with a feeder of the apparatus. A first screen deck receives and screens material from the feed. A second screen deck receives an undersize fraction of the first screen deck. First and second discharge conveyors output oversize fractions of the first and second screen decks. The first and second discharge conveyors pivot to operate in directions selected between a first direction and a second direction. The first direction is forward. The second direction differs from the first direction. One or both of the first and second discharge conveyors is/are pivotable from one side to an opposite side of the apparatus. Oversize fraction material of the first screen deck and oversize fraction material of the second screen deck are selectively discharged in a common pile.

Abstract: A method and an arrangement for removing amine(s) from a thickener overflow of a mineral processing plant. The method includes supplying the thickener overflow to an electrocoagulation unit and subjecting the thickener overflow to electrocoagulation in order to separate at least some of the amine(s) as an electrocoagulation overflow and in order to form a residual process water as an electrocoagulation underflow, and removing the electrocoagulation overflow. The method is free of all of the following: a coagulant, a flocculant, an adsorbent and an additional flotation chemical.

Abstract: A method of maintaining a grate of a grinding mill, the method comprising the steps of gripping a worn rotable segment comprising at least one grate support element provided with a mounting flange at the outer perimeter of the grate support element configured to mount the grate support element to a shell of the grinding mill, and at least one grate panel attached to the grate support element. The method further comprises unmounting, from the outside of the grinding mill, the mounting flange of the grate support element from the shell of the grinding mill, and lifting the unmounted worn rotable segment from the grinding mill.

Abstract: A grate support element for supporting a grate of an open-ended grinding mill comprises an outer perimeter section, an inner section, and at least one vane extending between the outer perimeter section and the inner section. The grate support element further comprises a mounting flange at the outer perimeter of the grate support element configured to enable mounting of the grate support element to a shell of the grinding mill at an area of the shell not intruding to the grinding mill volume. The mounting flange extends outwards from the middle of the cross section of the grinding mill.

Abstract: A double shaft paddle mixer, including a barrel chamber, and a first paddle screw and a second paddle screw. The first paddle screw is provided with first paddles and the second paddle screw is provided with second paddles. The barrel chamber includes a crushing zone and a mixing zone. The crushing zone is partly separated from the mixing zone by a partition member. A first inlet is connected to the crushing zone and a second inlet is connected to the mixing zone and an outlet connected to the mixing zone. The double shaft paddle mixer can be part of an arrangement and part of a method for producing paste.

Abstract: A grate support element for an open-ended grinding mill comprises an outer perimeter section, an inner section, and at least one vane extending between the outer perimeter section and the inner section of the grate support element. The vane is angled with respect to a plane defined by the outer edge of the outer perimeter section in such a manner that the inner section is configured to be provided outwards from the plane defined by the outer edge of the outer perimeter section, when the grate support element is mounted to the open-ended grinding mill.

Abstract: A filter press for separating solid components from liquid components of a slurry. The filter press includes a compression system coupled to a stationary pressure plate of the filter press. The compression system includes at least one electrically operated compression actuator having a planetary screw assembly, and a transport system coupled to a displaceable pressure plate of the filter press. The transport system includes at least one electrically operated transport actuator having a rack and pinion drive assembly. The compression system rigidly connects to the transport system so as to form, for each respective pair of compression actuators and transport actuators, a common actuator link which extends linearly from the stationary pressure plate to the displaceable pressure plate along the longitudinal dimension. A retrofitting kit for a filter press, a method for replacing an existing compression and transport system for a filter press and a method for controlling a filter press are set forth.

Abstract: A filter plate frame assembly with a filter plate frame and a subframe housed within the frame, such that the subframe can be removed from the frame without removing the frame from the filter press. In this way, consumable components can be provided in connection with the subframe, which can be easily removed from the filter press. This, in turn, makes replacement of worn components faster, as the whole frame does not need to be removed from the filter press. An associated horizontal filter press and a method of replacing worn components of such a filter press is also provided.

Abstract: A method for controlling pellet quality in iron ore production includes the steps of mixing water, binder and iron ore particles in at least one mixer to form a mixture (step (i)) and pelletizing the mixture into green pellets (step (ii)). Between step (i) and step (ii), a part of the mixture is taken in a sampling operation, formed into a test specimen and subjected to a test.

Abstract: A flotation arrangement for treating mineral ore particles suspended in slurry. The arrangement includes a primary line including at least two primary flotation cells, a first secondary line, and a second secondary line downstream of the first secondary line. In the arrangement, underflow from a secondary line is arranged to flow to the last of the at least one primary flotation cells from which the primary overflow was received, or to a primary flotation cell downstream of the last of the at least one primary flotation cells from which the primary overflow was received. The disclosure further relates a use of a flotation arrangement, to a flotation plant and to a flotation method.

Abstract: An on-road truck body lining for protecting an on-road truck body from wear. The on-road truck body lining includes a plurality of main lining elements and a plurality of edge lining elements arranged to be fixated to the on-road truck body. Each of the main lining element includes a load facing portion, one or more transition sides each adapted to meet a corresponding transition side of an adjacent edge lining element and a truck body facing portion, arranged opposite to the load facing portion. The truck body facing portion includes one or more end portions protruding from a respective transition side of the load facing portion such that the one or more end portions of the truck body facing portion are each arranged to be covered by a respective adjacent edge lining element such that the respective adjacent edge lining element, upon being fixated, clamps the main lining element to the on-road truck body.

Abstract: A mineral material processing plant, a crusher and an upper frame for a crusher. The upper frame includes a central hub for receiving a main shaft of the crusher, an upper rim, and a spider arm. A u-shaped cavity extends towards a lower flange from the upper rim.

Abstract: A method for treating process water of a flotation arrangement, the flotation arrangement including a flotation arrangement including a mineral flotation line and a process water treatment arrangement for treating underflow of the of the mineral flotation line. The method includes the steps of a) dewatering underflow from the flotation in a gravitational solid-liquid separator; b) subjecting supernatant from step a) to cleaning flotation for collecting at least fine particles and residual flotation chemicals, for separating at least fine particles and residual flotation chemicals from the supernatant into cleaning flotation overflow, and for forming purified process water as cleaning flotation underflow; c) removing cleaning flotation overflow as tailings, and d) recirculating purified process water into the mineral flotation line.

Abstract: A feedwell apparatus trough, plant and use. The apparatus is adapted to materials including liquids carrying suspended particles, such as slurry containing minerals. The feedwell apparatus includes a supply channel for receiving the material, a trough, a first end of which being connected in fluid communication with the supply channel. The trough has a curved shape that turns in one direction, and a series of through-openings in the wall(s) of the trough. The through-openings are arranged in the trough in unequal pattern such that the area of the through-openings in pro-portion to the corresponding area of the walls has its minimum value in portion of the trough close to the first end thereof, and the relation being arranged to grow with the distance from the first end.