Liner system for a mill shell

A liner system for installation in a rotatable mill shell having an inner side and an opposed outer side, the liner system comprising:

• at least one lifter bar comprising:
• a body;
• a channel inner plate secured to the body and partially defining a channel axis, the channel inner plate comprising a central portion thereof and a pair of lateral extensions, each said lateral extension extending from the central portion a predetermined distance from the channel axis respectively;
• a pair of channel outer plates secured to the body and positioned between the channel inner plate and the inner side of the mill shell, each said channel outer plate comprising respective outer portions positioned to engage the respective transverse portions, to resist movement of the respective transverse portions outwardly toward the inner side of the mill shell;
• a channel central housing at least partially positioned between the channel inner plate and the channel outer plates for resisting outward movement of the channel inner plate toward the inner side of the mill shell, the channel central housing comprising at least one outer arm and a cavity therein that is at least partially defined by said at least one outer arm;
• at least one attachment assembly comprising:
• a fixing washer at least partially positioned in the cavity and engaged with said at least one outer arm, said at least one outer arm being formed to resist movement of the fixing washer outwardly toward the inner side of the mill shell;
• a bolt defining a bolt axis and extending between inner and outer ends, the bolt comprising a head at the inner end engageable with the fixing washer, the bolt being positionable in a predetermined position relative to the mill shell in which the bolt axis is substantially aligned with the channel axis, with the inner end engaged with the fixing washer and the outer end positioned outside the mill shell;
• a nut threadably engageable with the bolt at the bolt's outer end;
• an outer washer between the nut and the outer side of the mill shell, and engageable with the outer side of the mill shell when the nut is tightened, to subject the bolt to tension, to urge the head outwardly toward the inner side of the mill shell, securing the lifter bar inside the mill shell;
• and
• the channel outer plates being configured to maintain the bolt in the predetermined position.

A liner system for installation in a rotatable mill shell having an inner side and an opposed outer side, the liner system comprising:

• at least one lifter bar comprising:
• a body;
• a channel inner plate secured to the body and partially defining a channel axis, the channel inner plate comprising a central portion thereof and a pair of lateral extensions, each said lateral extension extending from the central portion a predetermined distance from the channel axis respectively;
• a pair of channel outer plates secured to the body and positioned between the channel inner plate and the inner side of the mill shell, each said channel outer plate comprising respective outer portions positioned to engage the respective transverse portions, to resist movement of the respective transverse portions outwardly toward the inner side of the mill shell;
• a channel central housing at least partially positioned between the channel inner plate and the channel outer plates, for locating the channel inner plate, the channel central housing comprising at least one outer arm and a cavity therein that is at least partially defined by said at least one outer arm;
• a pair of insert elements respectively positioned between the outer portions of the channel outer plates and the inner surface of the mill shell to resist movement of the respective transverse portions outwardly;
• at least one attachment assembly comprising:
• a fixing washer at least partially positioned in the cavity and engaged with said at least one outer arm, said at least one outer arm being formed to resist movement of the fixing washer outwardly toward the inner side of the mill shell;
• a bolt defining a bolt axis and extending between inner and outer ends, the bolt comprising a head at the inner end engageable with the fixing washer, the bolt being positionable in a predetermined position relative to the mill shell in which the bolt axis is substantially aligned with the channel axis, with the inner end engaged with the fixing washer and the outer end positioned outside the mill shell;
• a nut threadably engageable with the bolt at the bolt's outer end;
• an outer washer between the nut and the outer side of the mill shell, and engageable with the outer side of the mill shell when the nut is tightened, to subject the bolt to tension, to urge the head outwardly toward the inner side of the mill shell, securing the lifter bar inside the mill shell;
• and
• the channel outer plates and the inserts being configured to maintain the bolt in the predetermined position.

A lifter bar to be secured in a rotatable mill shell having an inner side and an opposed outer side, the lifter bar comprising:

• a body thereof;
• a channel plate secured to the body and defining a channel axis;
• the channel plate comprising a central portion aligned with the channel axis and at least one lateral extension extending transversely from the central portion in relation to the channel axis;
• the channel plate additionally comprising at least one outer arm and a cavity that is at least partially defined by said at least one outer arm;
• and
• at least one insert element positioned between said at least one lateral extension and the inner side of the mill shell, for resisting outward movement of said at least one lateral extension toward the inner side.