A lifter bar, method for making a lifter bar, method for assembling a lifter bar and a grinding mill
AssigneeOutotec (Finland) Oy
InventorKari LAUERMAA
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Abstract
This relates to a lifter bar, a method for making a lifter bar, a method for assembling a lifter bar and a grinding mill comprising multiple lifter bars. The lifter bar comprises a lifter bar body having a wear surface and comprising polyurethane (PU), a reinforced wearing plate attached to the lifter bar body and forming part of the wear surface. The reinforced wearing plate comprises metal and a wearing surface for forming a part of the wear surface of the lifter bar, and an attachment structure provided to the reinforced wearing plate for attaching the reinforced wearing plate to the lifter bar body. The attachment structure protrudes into the lifter bar body for forming a connection with polyurethane (PU).
Claims33
A lifter bar, the lifter bar being mountable to a shell of a grinding mill for ore grinding, said lifter bar having an outer surface comprising a fixing surface to be arranged against the shell and a wear surface facing toward interior of the grinding mill, the lifter bar comprises:
- a lifter bar body having a wear surface conforming the wear surface of the lifter bar, the lifter bar body comprises polyurethane (PU) and said lifter bar body further comprises rubber;
- and
- a reinforced wearing plate attached to the lifter bar body and forming part of the wear surface, the reinforced wearing plate comprises metal, said reinforced wearing plate further comprises a wearing surface for forming a part of the wear surface of the lifter bar;
- and an attachment structure provided to the reinforced wearing plate for attaching the reinforced wearing plate to the lifter bar body, said attachment structure protruding into the lifter bar body for forming a connection with polyurethane (PU) and the lifter bar body comprising at most 85% polyurethane.
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A grinding mill comprising multiple lifter bars for ore grinding, said lifter bars being arranged to a shell of the grinding mill, said lifter bars comprising a lifter bar body comprising polyurethane and said lifter bar body further comprising rubber, and a reinforced wearing plate attached to the lifter bar body, the reinforced wearing plate comprising a wearing surface forming a part of an outer surface of the lifter bar;
- and an attachment structure provided to the reinforced wearing plate and attaching the reinforced wearing plate to the lifter bar body, said attachment structure protruding into the lifter bar body for forming a connection with polyurethane (PU) and the lifter bar body comprising at most 85% polyurethane.
Dependencies are inferred from the claim text.