US 4,319,719 AGranted

Shell liner assembly for ore grinding mills

AssigneeMinneapolis Electric Steel Castings Company

InventorDarrell R. Larsen

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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. The holder segments are secured directly to the shell by identical mounting bolts through mounting openings which are protectively covered by the wear segments to preclude exposure to the ore fragments during the comminution process.

Claims17

Dependent claims

A liner assembly for the cylindrical shell of an ore grinding machine comprising:

(a) a plurality of first liner segments of predetermined size and configuration, each defining a bottom mounting surface constructed for mounting engagement with the inner surface of the cylindrical shall, and each of said first liner segments further defining a top mounting surface;
(b) said first liner segments being disposed in close proximity to each other with minimum space therebetween so that said plurality of first liner segments covers virtually the entirety of said cylindrical shell;
(c) a plurality of second liner segments of predetermined size and configuration, each of said second liner segments defining a bottom mounting surface constructed for mounting engagement with the top mounting surface of an associated first liner segment, each second liner segment further defining a top grinding surface for comminuting ore;
(d) said second liner segments being disposed in close proximity to each other with minimum space therebetween, and being sized relative to the first liner segments so that, in assembled relation, the first liner segments are substantially covered by the second liner segments and virtually unexposed to the ore comminution process to prevent the first liner segments from becoming worn;
(e) first connecting means for releasably mounting a portion of the first liner segments to the cylindrical shell independently of the second liner segments;
(f) and second connecting means for releasably mounting each of the second liner segments on an associated one of said first liner segments to permit removal thereof without removing the associated first liner segments from the cylindrical shell;
(g) the first and second liner segments being so constructed that the second liner segments completely and protectively cover the first connecting means with the liner assembly in assembled relation.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 06/115,940Filed 28 Jan 1980 · continuation in part
Priority: 11 Aug 1978
Granted: 16 Mar 1982
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

B02C 17/22
Details: lining for containers
B02C 2013/2825
Shape or inner surface of mill-housings: with fastening means for fixing lining members to the inner surface of mill-housings
Y10S 241/30
Solid material comminution or disintegration: rubber elements in mills
B02C
Crushing, pulverising, or disintegrating in general

Family

Serial932,711Parent of this continuation-in-part · filed 11 Aug 1978
Serial79,382Parent of this continuation-in-part · filed 27 Sep 1979
US 4,270,705 AParent of this continuation-in-part
US 4,235,386 AParent of this continuation-in-part
US 4,319,719 AThis patent

From the US filing history. Foreign family members aren’t listed.