Mill Liners

Grinding Mills: Ball Mill & Rod Mill Design & Parts

Common types of grinding mills include Ball Mills and Rod Mills. This includes all rotating mills with heavy grinding media loads.  This article focuses on ball and rod mills excluding SAG and AG mills. Although their concepts are very similar, they are not discussed here.

Photographs of a glass ended laboratory

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By | 2017-10-23T18:28:03+00:00 July 10th, 2016|Categories: Ball Mills, Equipment, Grinding, Mill Liners, Rod Mills, Tools of a Metallurgist|Tags: , , , , |Comments Off on Grinding Mills: Ball Mill & Rod Mill Design & Parts

SAG Mill Liner Design

SAG_LinersTo a more significant degree than in other comminution devices, SAG Mill Liner Design and Configuration can have a substantial effect mill performance. In general terms, lifter spacing and angle, grate open area and aperture size, and pulp lifter design and capacity must be considered. Each of these topics has had a considerable

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By | 2017-08-17T08:44:51+00:00 June 6th, 2016|Categories: Grinding, Mill Liners, SAG Mills|Tags: |Comments Off on SAG Mill Liner Design

SAG Mill Grinding Circuit Design

AG and SAG mills are now the primary unit operation for the majority of large grinding circuits, and form the basis for a variety of circuit configurations. SAG circuits are common in the industry based on:

  • High single-line capacities (leading to capital efficiency)
  • The ability to mill a broad range of ore types in various circuit configurations, with reduced numbers of unit operations (and a corresponding reduction in the complexity of maintenance planning and coordination)
  • Favourable operating costs (with contributions from reduced liner/media consumption relative to conventional circuits)

Though some trepidation concerning AG or SAG circuits accompanied design studies for some lime, such circuits are now well understood, and there

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By | 2017-10-01T15:44:49+00:00 June 6th, 2016|Categories: Equipment, Grinding, Mill Liners, SAG Mills|Tags: |Comments Off on SAG Mill Grinding Circuit Design

Ball Mill Liner Design

There are many different designs and styles of ball mill liners. As with grinding balls local economics and ultimately operating costs determine the best design and material to use. The initial set of liners is rarely the final design selected. Based upon individual experience, mill superintendents develop preferences for liner designs. The following

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By | 2017-07-14T10:56:12+00:00 January 5th, 2016|Categories: Ball Mills, Grinding, Mill Liners|0 Comments

Gibson Roll Ball Mill

CRUSH, GRIND and CLASSIFY in a single pass!

YOU Will save time, money and labor with the Gibson combination Elliptic Roll and Ball Mill.• It is the first successful mill put on the market that will take the mine run of ore. Crush grind and classify in a single pass. • Horsepower consumption over one third less than ordinary ball mills. • Available in 12, 25, 50 and 100 tons capacity

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By | 2017-03-17T19:40:40+00:00 November 20th, 2015|Categories: Grinding, Mill Liners|Comments Off on Gibson Roll Ball Mill

Estimated/Approximate Steel Liner Wear Life/Rate

A mill’ steel liner wear rate and total useful operating life is a function of its hardness (mostly).  Here is a chart displaying Liner Hardness on the Brinell Scale as a function of the tonnage of ore/rock milled/processed.

Not showed here is the impact a mill’s RPM has on the liner’s wear rate.

estimate mill liner wear rate

Comminution and Energy

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By | 2017-03-17T19:42:51+00:00 October 7th, 2015|Categories: Grinding, Mill Liners|0 Comments

Estimated/Approximate Rubber Liner Wear Life/Rate Cost

In a Ball Mill (particularly) the wear rate or wear life of Rubber depends much on the Ball Size/Diameter used in that mill.  The grinding media size which itself is much of a function of the ore/material P80 feed size into that mill.

The other primary and addition factor contributing to a mill rubber liner wear is the RPM at which you operate the

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By | 2017-03-17T19:42:52+00:00 October 7th, 2015|Categories: Grinding, Mill Liners|0 Comments

How a Grate Discharge Ball Mill Works

Here I try to explain how ground slurry is discharged from a grate ball mill (or SAG).  How it works is, the slurry flows across the grate as it would a screen panel.

On the other side of the grate/screens are veins like a pump impeller.  As the mill turns/rotates the slurry is “pumped” out and discharged.

Grate Discharge Ball Mill

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By | 2017-03-17T19:46:47+00:00 August 13th, 2015|Categories: Grinding, Mill Liners|0 Comments

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