FIGURE 1—The tramline discharge terminal at the concentrator.

In all stages of milling, dust control is a major con-
sideration, with the use of enclosures and maintenance
of negative pressures within the enclosures through
the dust collection system.

All processes — drying, ventilation, dust control,
aspiration, conveying, separation and fibre cleaning —
require large volumes of air, a major consideration in
an asbestos milling operation.

Concentrator and Dryer Circuit (Fig. 5)

The tramline buckets which deliver the ore from
the mine drop it onto a 60-in. reversible feed belt
which forms part of the tramline discharge hopper.
This belt normally discharges the ore to the 36-in. con-
centrator feed belt, past a magnetic conveyor, metal
detector and weightometer, to a 6- by 12-ft single-deck
Tyrock screen fitted with a 114-in. by 4-in. opening.
The undersize from the Tyrock screen is discharged to
a 30-in. belt feeding the dryer circuit. The oversize
is sent to an APK60 Hazemag impact crusher, dis-

FIGURE 2—The Cassiar mill buildings.

| MILL AIR BUILDING | "™,...
1970 MILL
CONCENTRATOR

Yt LLUL ee

TAILINGS! saa Sean

FIBRE STORAGE

DRYER

DRY ROCK STORAGE

2
5:
4 1954 MILL
5
6
t

SITE PLAN
GASSIAR MILL
APRIL 78