Abstract: Various embodiments of a hammermill system, hammer, and methods are disclosed. A hammermill hammer comprises a metal composite comprising a plurality of inserts and a body portion disposed between each of the plurality of inserts. The composition of the plurality of inserts is different than composition of the body portion. The material of the plurality of inserts has a greater abrasion resistance than the material of the body portion and the material of the body portion has a greater impact resistance than the material of the inserts. The hammers produced have improved wear resistance and longer useful life compared to conventional hammermill hammers.

Abstract: The invention relates to a shell plate, to a method for making a shell plate and to a grinding mill for ore grinding. The shell plate is mountable to a shell of a grinding mill for grinding ore and includes a shell plate body having a first portion including a fixing surface for fixing the shell plate body to the shell, and a second portion having a wear surface facing toward an interior of the grinding mill. The first portion and the second portion form a continuous shell plate body, and the second portion includes polyurethane such that the wear surface is made of polyurethane.

Abstract: A high-hardness low-alloy wear-resistant steel sheet and a method of manufacturing the same, which has the chemical compositions (wt %): C: 0.33-0.45%; Si: 0.10-0.50%; Mn: 0.50-1.50%; B: 0.0005-0.0040%; Cr: less than or equal to 1.50%; Mo: less than or equal to 0.80%; Ni: less than or equal to 2.00%; Nb: less than or equal to 0.080%; V: less than or equal to 0.080%; Ti: less than or equal to 0.060%; RE: less than or equal to 0.10%; W: less than or equal to 1.00%; Al: 0.010-0.080%, Ca: 0.0010-0.0080%, N: less than or equal to 0.0080%, O: less than or equal to 0.0080%, H: less than or equal to 0.0004%, P: less than or equal to 0.015%, S: less than or equal to 0.010%, and (Cr/5+Mn/6+50B): more than or equal to 0.20% and less than or equal to 0.50%; (Mo/3+Ni/5+2Nb): more than or equal to 0.02% and less than or equal to 0.50%; (Al+Ti): more than or equal to 0.01% and less than or equal to 0.13%, the remainders being Fe and unavoidable impurities.

Abstract: A lifter bar, method for making a lifter bar, a method for assembling a lifter bar and a grinding mill for ore grinding is provided. The lifter bar includes a lifter bar body having an outer surface conforming to the outer surface of the lifter bar and a fixing element for connecting the lifter bar to the shell of the grinding mill. The lifter bar body further includes a first portion and a second portion forming a continuous lifter bar body. The fixing element is embedded in the first portion such that it forms part of the fixing surface of the lifter bar. The second portion is made of polyurethane and forms 35-85% of the volume of the lifter bar.

Abstract: Provided is a shot peening device with which recovered projection material and foreign bodies can be more precisely separated while inhibiting an increase in the size of the device. The shot peening device is provided with: a projector which projects projection material onto a workpiece (W); recovery mechanisms which recover the projection material projected by the projector; and a wind power sorting mechanism in which recovered projection material is allowed to fall freely while an upward air current is applied to the recovered projection material, and foreign bodies included in the recovered projection material are separated from the recovered projection material.

Abstract: A lifter bar includes at least one attachment formation for use in lifting the lifter bar; wherein the at least one attachment formation is embedded in the lifter bar. A method of producing the lifter bar and tools for use in handling the lifter bar are also described.

Abstract: The invention relates to an agitator ball mill having a vertically arranged container, in which there an agitator that can be rotated about a vertical axis is arranged, and having at least one wear prevention element that can be fitted to the container inner wall with the aid of a fixing system, wherein the fixing system comprises a fixing pin and a fixing cut-out, which are arranged on the container inner wall and/or the rear side of the wear prevention element in such a way that the wear prevention element can be fixed to the container inner wall by means of a movement of the wear prevention element in a direction which forms an angle ?>0° with the vertical axis of the rotatable agitator, in that the fixing pin is guided into the fixing cut-out.

Abstract: A wear plate system comprises a wear plate for mounting to the inside of a grinding mill A fastening arrangement comprises an elongate coupling member having a first end arranged to secure to the wear plate such that when so secured the coupling member is arranged to pivot with respect to the wear plate. A second end of the elongate coupling member secures to the grinding mill.

Abstract: An interlocking liner segment for a tumbling unit is disclosed which comprises a body having an inner surface having a first end and a second end, an outer surface, a first side edge, a second side edge opposite the first side edge, a front edge, and a back edge, a first lifter portion at the first end having a first aperture; a second lifter portion at the second end having a second aperture; and a rifling portion on the inner surface intermediate the first lifter portion and the second lifter portion.

Abstract: Provided is a liquid developer-preparing apparatus preparing a liquid developer obtained by dispersing toner particles in a liquid, the apparatus including, a tank that stores a dispersion including a liquid and toner particles, a pulverizing device that pulverizes the toner particles in the dispersion sent from the tank; a liquid-sending route in which the dispersion circulates between the tank and the pulverizing device, a liquid-sending device that is provided to the liquid-sending route and sends the dispersion, a pressure gauge that is provided to the liquid-sending route and measures a liquid-sending pressure of the dispersion, and a determination device that determines whether or not the toner particles in the dispersion have been pulverized to a target volume average particle size.

Abstract: A liner fastener for fastening a liner to a rotatable shell of a grinding mill, the fastener comprising a flexible tie, retaining means for retaining the fastener relative to the liner, and a tensioning fitting, wherein the flexible tie is adapted to be inserted into a mounting aperture in the shell, and the tensioning fitting is adapted to be fitted to an end portion of the flexible tie protruding outside the shell to bear against the shell and to maintain tension in the fastener to thereby fasten the liner to the shell.

Abstract: A trunnion seal assembly for joining a stationary inlet/outlet box of a ball tube mill to a rotational interior of the ball tube mill includes an outer ring component configured to be mounted to an outer wall of the stationary inlet/outlet box. An inner ring component is joined to the outer ring component substantially concentrically with the outer ring component. A flexible pad seal is configured to be joined to the outer wall of the stationary inlet/outlet box proximate outer ring component. The pad seal includes a first annular sealing surface. A mill head extension ring configured to be joined to a rotational mill head is located proximate to and substantially concentric with the inner ring component. The mill head extension includes a second annular sealing surface sealingly engaged with the first annular sealing surface of the flexible pad seal.

Abstract: A mill liner assembly for mounting on an inner diameter of a shell of a grinding mill. The mill liner assembly includes one or more shell plates for engagement with the shell, each of the shell plates having a cooperating portion thereof, and one or more lifter bars, each of the lifter bars having a mounting portion thereof, the mounting portion being receivable on the cooperating portion. The mill liner assembly also includes one or more layers having one or more substantially non-resilient materials and a substantially non-sticking surface. The layer is at least partially positioned on at least a first selected one of the cooperating portion and the mounting portion, to position the non-sticking surface thereof for engagement with a second selected one of the cooperating portion and the mounting portion, to impede adhesion of the shell plate and the lifter bar to each other.

Abstract: A tube mill for wet-grinding of lumpy material. The tube mill can have a mill cylinder, an inlet opening for charging the lumpy material, a means for adding an aggressive medium and a discharge opening. In addition, the mill cylinder can have an internal lining of epoxy material and the means for adding an acid to the lumpy material in the region of the inlet opening.

Abstract: A wear plate system comprises a wear plate for mounting to the inside of a grinding mill A fastening arrangement comprises an elongate coupling member having a first end arranged to secure to the wear plate such that when so secured the coupling member is arranged to pivot with respect to the wear plate.

Abstract: A sand wheel seal for a grinding mill, which in use is internally disposed within said mill. Preferably the sand wheel seal is integrally formed with a mill throat liner wheel and may be releasably secured to a feed end of said mill. The grinding mill may be any one of a Sag, Ag, Ball or Rod mill.

Abstract: A cushioning element suitable for use in a liner assembly for a grinding mill, the liner assembly including a mounting element having a recess therein, the cushioning element being located within the recess, and a wear element operatively connected to the cushioning element, the cushioning element including a cushion body of elastomeric material including a side section and opposed end sections, a plurality of cavities within the cushion body and extending from at least one of the end sections towards the other end section.

Abstract: A mill liner assembly for mounting on an inner diameter of a shell of a grinding mill. The mill liner assembly includes one or more shell plates for engagement with the shell, each of the shell plates having a cooperating portion thereof, and one or more lifter bars, each of the lifter bars having a mounting portion thereof, the mounting portion being receivable on the cooperating portion. The mill liner assembly also includes one or more layers having one or more substantially non-resilient materials and a substantially non-sticking surface. The layer is at least partially positioned on at least a first selected one of the cooperating portion and the mounting portion, to position the non-sticking surface thereof for engagement with a second selected one of the cooperating portion and the mounting portion, to impede adhesion of the shell plate and the lifter bar to each other.

Abstract: A wear component for use in an impact crusher having a forward depression on the face of the wear component which is exposed to aggregate wear. Wear resistant inserts, for example cemented tungsten carbide inserts, are bonded within the forward depression to prevent rapid abrasion of the wear component. Joints are formed between wear resistant inserts and joints are also formed between wear resistant inserts and the wear component. Bonding material fills the joints to further secure the wear resistant inserts and to prevent crack propagation.

Abstract: A cushioning element suitable for use in a liner assembly for a grinding mill, the liner assembly including a mounting element having a recess therein, the cushioning element being located within the recess, and a wear element operatively connected to the cushioning element, the cushioning element including a cushion body of elastomeric material including a side section and opposed end sections, a plurality of cavities within the cushion body and extending from at least one of the end sections towards the other end section.

Abstract: A method of fabricating a liner component for a grinding mill is described, the method including the steps of: providing a plate of hard material; cutting the plate to form a plurality of inserts, at least some of the inserts including a formation for mechanically engaging with a body of a resilient material; arranging the inserts in a mould, and—adding resilient material to the mould to form a resilient material body around the inserts to thereby form the liner component.

Abstract: A fastening spider (1) and a method of fastening a wear-resistant lining element (2) to a support surface (3), over which wear-resistant lining element (2) material in the form of pieces or particles is intended to move. The fastening spider (1) comprises a mounting portion (5) for mounting positioning and clamping to the support surface (3) and at least one leg (8a-8b) projecting from the mounting portion (5) and having an underside for holding the wear-resistant lining element (2) to the support surface (3). The underside of the leg has an outer portion (10) and an inner portion (11), the inner portion (11) being positioned closer to the mounting portion (5) than the outer portion (10). The outer portion (10) is, at least in the mounting positioning of the mounting portion, positioned closer to the support surface (3) than the inner portion (11).

Abstract: A mill liner element is structured with an elongated elastomer member having a non-elastomeric backing plate and a plurality of non-elastomeric inserts formed into the elastomer member to provide a liner element that provides a lifter bar element and a wear element that is less prone to cracking compared to conventional all-metal mill lining elements, and which provides ease of handling and replacement when worn. A multiplicity of mill liner elements are positionable in a grinding mill shell, and are suitable for use in a variety of types of grinding mill structures, including ball mills and AG and SAG mills.

Abstract: A tube mill is provided with liners fastened to a shell. The tube mill is provided with an adaptor plate. The adaptor plate is provided with a first pattern of drilling holes in a DIN pattern and a second pattern of drilling holes in a non-DIN pattern. The adaptor plate is fastened to the shell via one or more holes of the second pattern and a number of liners is fastened to the adaptor plate via one or more holes of the first pattern.

Abstract: A system for lining a substrate, such as a rock chute, includes a liner with an engagement aperture that is configured to receive an adapter and that includes an internal ledge that enables use of the adapter to secure the liner to the substrate. Such a system may also include a base plate that may be secured to the substrate and that may be assembled with the liner to enable use of the adapter to attach the liner to the substrate. Methods for selecting a suitable adapter and using the adapter with the disclosed liner are also within the scope of the present invention.

Abstract: An apparatus includes a mill drum for pulverizing and classifying material. The mill drum includes a cylindrical drum housing and one or more beater plates mounted for rotation within the housing. Each beater plate includes a plurality of beaters mounted on the peripheral edges thereof. A drum liner assembly includes a plurality of drum liner segments secured to the drum housing. Each drum liner segment includes a backing plate and one or more drum liners mounted thereon. The drum liners are made of a carbide material to provide superior wear characteristics.

Abstract: The invention concerns an arrangement for the joining and attachment of a wear lining element (1) onto a surface that is subject to wear, a supporting surface (5) of a supporting construction (2), comprising attachment means (9) that when anchored in the wear lining element are each one intended to be inserted into attachment holes (10) arranged in the supporting construction whereby the wear lining element is held fastened against the supporting surface by means of supplementary fastening means (16) that are associated with the attachment means positioned to interact with the tensioning surface (11) located on the opposite side of the supporting surface.

Abstract: A tube mill is provided with liners fastened to a shell. The tube mill is provided with an adaptor plate. The adaptor plate is provided with a first pattern of drilling holes in a DIN pattern and a second pattern of drilling holes in a non-DIN pattern. The adaptor plate is fastened to the shell via one or more holes of the second pattern and a number of liners is fastened to the adaptor plate via one or more holes of the first pattern.

Abstract: The present invention is directed to, among other things, a grinding chamber side liner for attaching to the interior of a coal pulverizer housing that includes an overhanging rim for covering gaps between parts installed adjacently with respect to each other within the housing.

Abstract: A tumbler for tumbling concrete products comprises a rotatable cylindrical drum having an input end that is slightly elevated relative to an output end. Tire retread strips are placed side-by-side on the radially inner surface of the drum and extend along its length. Clamps having lateral arms extending on either side are engaged with lateral tread grooves on the strips. The clamps are bolted to the drum between adjacent strips thereby securing the strips to the radially inner surface of the drum.

Abstract: A method and apparatus for making highly pure silica powder by milling the substantially pure SiO2 charge in a ball mill which is made with an interior lining of contiguous silicon nitride plates or tiles and which employs silicon nitride media. The silicon nitride plates and media prevent contamination of the silica charge while minimizing their deterioration. The resulting slip (wet milling) or mix (dry milling) is of a higher purity because there are no substantial impurities contributed by the mill liner material or by the media.

Abstract: A liner assembly for the discharge end of an ore comminuting mill is disclosed. The discharge end is defined by an end wall having a plurality of bolt holes formed therethrough in a predetermined pattern for attaching the liner segments to the inner surface of the end wall. Each liner segment is formed with a plurality of bolt holes capable of being aligned with the bolt holes in the end wall. A locator pin projecting from the mounting surface of the liner segment is sized and configured to project into one of the end wall bolt holes, and it is positioned relative to the bolt holes in the liner segment so that upon such insertion the bolt holes of the liner segment automatically align with those of the end wall.

Abstract: The present invention provides a vibratory mill for grinding dental filler having a grinding chamber, preferably coated with an abrasion resistant polymer, the grinding chamber being charged with glass beads having a diameter in the range of about 0.1 mm to about 10.00 mm, and a refractive index substantially matching that of the dental filler to be ground. There is further provided a method of using this mill and media to provide substantially pure ground particles having an average particle size less than the average wavelength of visible light that, when incorporated into a dental restorative composite, impart good optical properties to the cured material.

Abstract: A segmented liner assembly and liner segment fastening system is disclosed for the rotatable shell of an ore grinding machine, the shell having a plurality of mounting bores formed therethrough. The liner assembly consists of a plurality of liner segments each of which has one mounting bore that extends into the body of the segment from its mounting surface and a mounting recess having a transverse size greater than that of the mounting bore which extends from the mounting bore to the grinding surface. A threaded member extends through a mounting bore of the shell and an aligned mounting bore of the segment into the recess of the segment and externally of the shell. The threaded member is screwed into a nut that is seated at the base of the mounting recess. In a first embodiment, the threaded member has an integrally formed wrenching head enabling the threaded member to be rotated and screwed into the nut, thus drawing the liner segment tightly against the inner surface of the shell.

Abstract: A grinding mill liner having inward and outward layers. The outward layer is formed of a relatively soft, shock-absorbent material and the inward layer is formed of a relatively hard, impact and abrasion resistant material. A plurality of magnets are embedded in the inward layer. A pair of pole pieces are positioned on opposed sides of each magnet and embedded in the inward layer. The pole pieces extend above the magnet, protecting it from the impact forces to which the liner is subjected during operation of the grinding mill. The pole pieces also focus the magnetic field forces emanating from the magnet. The magnets are arranged in rows, with adjacent poles of adjacent pairs of magnets within each row having alternate polarity; and, with adjacent poles of adjacent pairs of magnets in adjacent pairs of the rows having alternate polarity. The rows are parallel to one another and extend transversely to the direction in which material flows across the liner during operation of the grinding mill.

Abstract: The present invention provides a mill having an agitator and grinding chamber which is coated with a non-pigmented, abrasion resistant polymer and a method of using this mill to provide substantially pure ground particles. The polymer coating is typically a thermosetting polymer such as polyurethane or an elastomer such as a fluoroelastomer. The polymer coating provides an abrasion resistant layer between the milling media and the agitator as well as between the grinding chamber and the milling media to prevent spalling, thus increasing the purity of the resultant ground material. The agitator mill may optionally include a ceramic gap separator which is typically formed of stacked plates separated a predetermined distance by shims to separate the ground particles from the milling media in the grinder chamber, thus allowing only the ground particles to pass out of the grinding chamber.

Abstract: The present invention provides a vibratory mill having a grinding chamber, preferably coated with an abrasion resistant polymer, the grinding chamber being charged with glass beads having a diameter in the range of about 0.1 mm to about 10.00 mm. There is further provided a method of using this mill to provide substantially pure ground dental filler particles having an average particle size less than the average wavelength of visible light.

Abstract: Comminuting media comprising a martensitic/austenitic steel which contains at least about 40 percent by volume retained austenite, a portion of which is work transformable to martensite. The steel contains sufficient alloy content such that the steel has a martensite start and finish temperature sufficiently low to allow partial transformation of austenite to martensite during quenching of the steel from the austenitic range, but leaving some retained transformable austenite. This steel is used as a comminuting media, the retained austenite transforming to martensite through working or abrasion of the comminuting media during use in a comminution process. The outermost volume of the comminuting media which forms the wear surface and which contains the retained austenite in an amount of at least 40 percent by volume comprises at least 25 percent of the total volume of the comminuting media.

Abstract: An adapter for mounting a liner to a first mill having an inner diameter with a first contour. The liner has a back face with a second contour shaped for mating with a second mill. The adapter includes a top face and a bottom face. The top face supports the back face of the liner. The bottom face has a contour formed for mating with the contour of the first mill.

Abstract: A trunnion liner apparatus includes a main body portion in the form of a rubber boot which forms a main pocket and a pair of cavities. A magnetic block is held within the main pocket for attaching the trunnion liner directly to an inside surface of a trunnion. The pair of upper cavities are sized to hold a layer of material to prevent wear on an inside surface of a trunnion. In one embodiment, the layer of material comprises a plurality of steel balls and processed material interdispersed between the steel balls.

Abstract: A workpiece cleaning mill that is useful for cleaning castings includes a hollow housing that is established by arranging plural elongated manganese flights side-by-side to establish a cylinder, and attaching the flights to opposed entrance and exit rings. A feed conveyor feeds workpieces into the entrance end, and an exit conveyor conveys the workpieces away from the exit end. Media throwers are disposed at each end to throw high-speed cleansing media, such as shot, into the housing. The housing is rotated as the workpieces move, under the influence of gravity and/or following workpieces being fed into the housing, from the entrance end to the exit end while being bombarded with shot. Steel mesh curtains at each end block the media from passing outside of the mill. Spent media falls through perforations in the flights, and the spent media is conveyed back to a media hopper and thence to the media throwers for reuse. Magnetic valves regulate the amount of media thrown by the throwers.

Abstract: A retaining rod is provided for forcing a tight interfit between adjacent segments of a liner of a casting shake-out unit, sand reclaimer, rotary media drum, or a tumbling unit. The adjacent edges of the liner segments have triangular grooves which combine to create diamond shaped channels between adjacent segments of the liner. The rod is generally diamond shaped in cross-section and tapered from front to back, giving the rod an overall trapezoidal appearance. The cross-sectional height of the rod is greater than the cross-sectional width of the rod. Thus, the rod can be placed in the channel in one of two positions and the same rod may be used if the clearance between adjacent segments is large or small simply by rotating the rod 90.degree..

Abstract: A shelf for protecting the inner surface of a vertical shell of a pulverizer against wear. It is partially replaceable. The shell accommodates a screw shaft and is filled with a pulverizing medium and a material to be pulverized. At least one of them is magnetizable. The shelf is made up of vertical and circumferential ribs and mounted in the shell. It is divided both vertically and circumferentially into a plurality of blocks that are coupled together by bolts and nuts. Magnets are provided in the spaces defined by the ribs. By turning the screw shaft, the pulverizing medium is pushed radially outward and partially trapped in the above spaces, thus forming a wear protective lining. When any of the ribs is worn, only the block that includes this rib is replaced with a new one.

Abstract: An arrangement for recording the instant volume of grinding charge in the mill drum of a rotary drum mill of the kind provided with an internal lifting device. In order to enable the volume of grinding charge to be used in a better way as a parameter for controlling mill operation, the lifting device is resilient and is provided with a load detecting device which, during each drum revolution, detects when the lifting device comes into engagement with, and is in engagement with the grinding charge present in the drum and leaves, or is caused to leave, engagement with the grinding charge. The arrangement also includes a tension sensing device which registers the tension on the load detector, this tension being contingent on the load to which the lifting device is subjected by the grinding charge.

Abstract: The present invention is a crushing machine including a rotatable housing having an inlet port and a discharge port and including an independent crushing means inside the housing. Support rings each of which is at least 1.8 times larger than the housing, circumscribe the housing and are fixed thereto. The support rings are engagable with a driving means for rotating the housing. The support rings support and distribute the weight of the housing on the driving means.

Abstract: A novel laminar assembly for use with comminution equipment, such as a liner for protecting the shell of an ore crushing mill or as a wear tip on a blow bar for use in a rock impact crusher. The laminar segment includes a plurality of laminae which are attached to each other with a rod extending through holes positioned in the base of the laminae, thereby forming a segment of virtually any desired length. Mounting bolts are configured in two pieces, with an axial hole extending through the head of the mounting bolt by which they are mounted to the rod and thereby attached to the liner segment. A second piece of the mounting bolt threadably engages the head of the bolt and extends through the mounting surface of the comminution equipment being used. The utilization of small laminae enable the laminae to be cast and heat treated such that the microstructure throughout the laminae may be strictly controlled, thereby providing a laminae with consistent hardness and toughness throughout the laminae.

Abstract: A ball-tube mill includes a rotatable drum enclosed at the opposite sides by bottoms having a charging port and a discharge port, the drum accommodating an even number of perforated walls having the form of an ellipse, arranged at an angle to the centerline of the drum, and offset along the like axes of the ellipse one relative to another to define milling chambers occupied by grinding bodies. The bottoms are inclined to the longitudinal centerline of the drum at an inclination angle equal to the angle of inclination of the perforated walls, each bottom and one of the perforated walls being inclined in pairs to the opposite directions, the bottoms and the perforated walls being successively offset along the like axes of the ellipse one relative to the other at an angle .beta.=360.degree.:n, where n is the total number of bottoms and perforated walls.

Abstract: A centrifugal fluidized grinding apparatus having balls as a grinding medium therein, comprises a parting vessel having a vertical axis, composed of inner and outer vessel parts both forming a circumferential groove. The circumferential groove has a continuous and smooth surface and provides a completely open inner space allowing the grinding medium and starting material to move freely through any part of the entire area of the inner space without encountering any obstacles. The groove has a generally ovoid profile with an upper part thereof cut away in a vertically cross-sectional view taken along a plane including the axis. The ovoid has a longitudinal axis intersecting the vertical axis at a position over the parting vessel. The inner and outer vessel parts are mounted for relative rotation about the vertical axis, in such a manner that the inner vessel part is rotated while the outer vessel part is stationary, or the latter is rotated in a reverse direction.

Abstract: A cylindrical grinding mill liner plate support comprising a base portion; means for securing the base portion to the shell of the grinding mill; replaceable corner bumpers detachably secured to each interior longitudinal edge of the base portion; and at least one side panel assembly, detachably secured to at least one side of the base portion. A cylindrical grinding mill liner comprising a plurality of liner plate supports placed in parallel courses along the longitudinal axis of the grinding mill which converts the heretofore circular cross-section of the hollow milling space into a polygonal, preferably square, cross-section.

Abstract: A liner for the outlet port of a rod mill including a cylindrical body provided on the peripheral edge of an opening of the liner and projecting outwardly through the outlet port to prevent a rod from exiting the liner. The projecting length of the cylindrical body on the side close to the end portion of the barrel of the rod mill is preferably longer than that on the opposite side.