Coupling for a grinding mill liner

A mill liner assembly for a grinding mill comprising a mill liner having a wear surface and an opposite inner surface, and a head nut forming part of a coupling for use in removably mounting the mill liner to an interior surface of the grinding mill, the mill liner further comprises at least one passage having an interior wall extending in the liner for receiving the head nut,

• wherein the head nut comprises a leading end and a trailing end being spaced apart along an axis:
• a body having an interior bore extending along the axis operative to receive a shank, the shank forming part of the coupling;
• and
• an engaging portion connected to or integrally formed with the body to engage the interior wall of the passage to retain the head nut in the at least one passage in the mill liner.

A method of installation of a head nut within a passage of a mill liner, the passage being defined by an interior wall and extending to an opening in the mill liner, the head nut forming part of a coupling for use in removably mounting the liner to an interior surface of a grinding mill,

• the method comprising:
• providing a head nut comprising a body having an interior bore extending along an axis operative to receive a shank, the shank forming part of the coupling;
• locating a leading end of the body in the passage such that the body is held in a locating position such that the leading end is spaced apart from the opening of the passage;
• applying force to the head nut to move the head nut to a seated position where the leading end abuts the interior wall of the passage, and the interior bore is aligned with the opening of the passage.