Wear-resistant, self-replenishing magnetized grinding mill liner

Details Wear-resistant, self-replenishing magnetized grinding mill liner Wear-resistant, self-replenishing magnetized grinding mill liner

1998-05-06

2000-02-22

Rosenbaum, Mark

Solid material comminution or disintegration

Apparatus

Loose grinding body comminutor

29428, 241DIG30, B02C 1722

Patent

active

060270578

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. The liner is made up of a number of circumferentially adjoining sections. Each section slopes upwardly from a longitudinally extending rearward face toward a longitudinally extending forward face. The respective faces of each section extend transversely to the direction in which material flows across the liner. Each section may be a separate tile. The tiles are removably and interlockably attached to the grinding mill's drum to form the liner.

REFERENCES:
patent: 3913851 (1975-10-01), Andersson
patent: 4340616 (1982-07-01), Weinert
patent: 4424938 (1984-01-01), Day

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