Abstract: The disclosure is directed to an improved liner assembly for an ore grinding mill. The liner assembly is of the segmented type, comprising a first plurality of holder segments which are mounted directly to the shell of the mill, and a second plurality of wear segments which are mounted to the shell in overlying relation to the holder segments, which are thus virtually unexposed to the ore comminution process and wear very slowly. The wear segments are formed with a plurality of downwardly projecting bosses which are received in similarly configured recesses formed within the holder segments. Mounting openings or bores are formed in the wear segments, extending from the top grinding surface to the center of each boss to receive a mounting bolt that extends through both segments and projects externally of the shell to receive a threaded lock nut. These mounting openings are countersunk so that the heads of the mounting bolts securing the wear segments are substantially recessed from the grinding surface.

Abstract: The disclosure is directed to an improved liner assembly for the cylindrical drum or shell of an ore grinding machine. The liner assembly comprises a plurality of holder segments each of which is formed with a longitudinal channel that is closed at the bottom and opens upwardly or toward the shell center. Each channel has longitudinal sides that converge toward the exposed or upper surface of the wear segment. Wear inserts of abrasion resistant material are inserted lengthwise into the channels, each having a cross section that conforms to the channel to be retained within it. The holder segments are mounted to the shell in axial rows with the inserts in end relation to present a continuous ridged wear surface over the entire axial length of the liner assembly.

Abstract: The disclosure is directed to an improved liner assembly for the drum or shell of an ore grinding machine, comprising a first plurality of liner segments mounted directly to the shell and a second plurality of segments each of which is secured to one of the first segments independently of the shell. In the claimed embodiment, each of the first segments defines a longitudinal, axially extending channel that opens toward the center of the shell and has opposed inner surfaces that converge toward the shell center. The first segments are secured to the shell by nut and bolt assemblies that extend through the segment from the bottom of the channel and through the shell. The second segments are constructed for lengthwise insertion into the channel, and each has converging sides conforming to the channel sides for retention therein, while at the same time protectively overlying the nut and bolt assemblies during the grinding process.

Abstract: The disclosure is directed to a multiple zone liner system for the cylindrical shell of a ball mill. The liner system comprises a plurality of liner sections which are constructed for mounting on the inner shell surface of the mill in sequential relation along its rotational axis. Each liner section is formed with a plurality of elevated ridges disposed in substantial alignment with the shell access, and which are circumferentially spaced therearound to define a comminuting surface. Each ridge defines a lifting surface that is disposed at a predetermined angle relative to a radius of the shell, and each ridge has a predetermined lifting dimension. The number of ridges of each liner section increases from section to section from the inlet to the outlet of the mill. The angle of the lifting surfaces of the ridges also increases from section to section toward the mill outlet. The lifting dimension of the ridges decreases from section to section from the mill inlet to the outlet.

Abstract: The disclosure is directed to an improved liner assembly for an ore grinding mill. The liner assembly is of the segmented type, comprising a first plurality of segments which are mounted directly to the shell of the mill, and a second plurality of segments each of which is secured to an associated first segment independently of the shell. The first segments are formed from material which is resistant to impact, and the second segments are made from material which is highly resistant to abrasion. As constructed, the second segments can be replaced after a period of wear from inside the mill, avoiding the necessity of replacing the first liner segments which requires working teams both inside and outside the mill. In one embodiment, the second segments are L-shaped and are secured to the first segments by nut and bolt assemblies that are generally aligned with the shell surface to resist shear forces.

Abstract: The disclosure is directed to an improved roll crusher comprising a central hub mounted on a rotatable shaft, a roll member carried by the hub in concentric relation thereto, and a pair of clamping rings for securing the components together. The roll member and hub have angular surfaces disposed in opposed relation to define a pair of annular, axially facing recesses having V-shaped sides. The clamping rings are constructed to fit into the recesses, each defining inner and outer circumferential surfaces which are angled to correspond to the angled surfaces of the hub and roll member. A plurality of equiangularly spaced bolts connect the clamping rings and hub, drawing the clamping rings toward each other to wedge the roll member radially outward relative to the hub. As a result, the roll member is fixed in a centered, balanced position relative to the hub. A plurality of lugs and lug receiving recesses cooperate to prevent relative rotation between the roll member and hub.

Abstract: A liner assembly for the shell or drum of an ore grinding machine. The liner assembly comprises a plurality of liner segments each of which defines a mounting surface constructed for mounting engagement with the inner shell surface and a grinding surface for comminuting the ore. Each of the segments has longitudinal sides that taper from the grinding surface to the mounting surface. When mounted in side-by-side relation, adjacent liner segments define a pocket between opposed, tapered sides. A wedge-shaped insert is disposed within each pocket and loosely retained therein by the opposed tapered surfaces to reduce the amount of particulate matter entering the pocket and to protect the inner surface of the shell. In the preferred embodiment, the ends of each segment may likewise be tapered toward the mounting surface so that pockets are also defined by the opposed ends of adjacent liner segments, and inserts are also loosely retained in these pockets.

Abstract: The disclosure is directed to a liner assembly for an autogenous ore grinding machine. The machine includes a large cylindrical drum which is rotated about a horizontal axis to comminute the ore. The liner assembly covers the inner cylindrical surface of the drum and consists of a plurality of longitudinal segments which are removably bolted to the drum. Each segment is made from a material which has good impact resistance and defines an irregular grinding surface to assist in the ore grinding process. An opening is formed through the segment body and extending longitudinally thereof, the opening being defined by walls that converge from the segment mounting surface to its grinding surface. A plurality of inserts, formed from material which is highly resistant to abrasion, are disposed in the opening and cooperate with the converging walls and each other in wedging relation for retainableengagement with the segment body bolted to the drum.

Abstract: A new procedure and apparatus for securing shell liners in ball and bar mills. The liners are formed with sockets of special shape at predetermined intervals therealong, and are held within the shell of the mill by bolts having heads, received in the sockets, and threaded shanks passing through the liners and the mill shell to nuts on the outside. The sockets and heads are shaped to provided continuous flat contact areas of substantial size regardless of variations in center distances of holes axially along the shell (i.e., the mounting holes are larger than the mounting bolt heads).