Quartz–mill.
（
Ore.) A machine for crushing quartz, to bring it down to a size suitable for the stamps, or to a fineness for the amalgamator.
See also ore-mill.
The following are typical forms, of each of which there are many varieties:—
1. The
Chilian-mill, consisting of edge-stones traveling in a trough.
 |
|
Quartering-machine (New York steam-engine Company). |
2. The stamp-battery.
3. Vibrating jaws.
4. Rotary beaters.
5. Horizontal runner.
6. Vertical runner.
7. Bell-shaped runner
8. Conical mill.
9. Inclined disks.
10. Rolling-ball.
11. Gyrating-pan.
1.
Fig. 4068 is an edge-mill, the stones traveling in an annular trough, the weight increased by a lever.
See also Chilian-mill.
2. The stamping-mill has a battery of stamps, either each acting in its own mortar, or, as in the example, in an annular trough, which is rotated by gearing below (Fig.
4069). See also stamp-mill.
 |
|
Edge-wheel quartz-mill. |
3. The crusher with jaws has either one or both movable.
In the example, the reciprocating motion in opposite directions of the lower ends is produced by hanging them on the respective sides of the pivot of rotation of the oscillating levers, and their upper ends are caused to approach by the rear supporting links, which are vibrated by the reciprocation of the jaws.
Fig. 4070. See also ore-mill.
4. The rotary beater.
The ore passes from the hopper into the first cylinder, the beaters on the shaft forming a partial vacuum.
The beaters strike the ore, which is carried by the peripheral force of the current through the connecting passage into the second chamber, through which it receives the same treatment, and passes to the connecting-pipe, which deposits it in the dust-chamber.
Fig. 4071.
5. Horizontal runner.
The stone is suspended above the bed, and is fed through the eye, as with grist-mills.
Fig. 4072.
6. The runner on horizontal shaft.
The cylinder surrounds the grinding-wheel, which is eccentrically journaled in respect to it, and revolves at different
[
1845]
speed thereto.
The matter to be crushed enters one end of the cylinder, and passes out beneath the shields and gauze-covered openings near the periphery of the same.
The cylinder runs on anti-friction rollers.
Fig. 4073.
 |
|
Stamping-mill. |
7. Bell-shaped runner in conical case.
This has two revolving toothed surfaces, one within the other, the interior in the shape of a cone, and the other one formed around the interior; both of these parts revolve in the same direction, but the interior one much faster than the outer.
Fig. 4074.
 |
|
Quartz-mill with vibrating jaw. |
8. Conical mill. The ore is broken and thrown into the hopper, and passes between the vertical compound wheel of the hopper and the concave, which is formed of segmental blocks.
From thence it passes to the final reducing stones.
Fig. 4075.
 |
|
Quartz-mill with rotary beaters. |
 |
|
Quartz-mill with horizontal runner. |
9. Inclined disks.
This has two revolving disks with conical-shaped surfaces revolving in different directions, and hung upon shafts placed diagonally to each other, so as to bring the two faces of two grinding disks parallel with each other.
Fig. 4076.
 |
|
Quartz-mill on horizontal shaft. |
10. The rolling ball.
This has a stationary mor-
[
1846]
tar or kettle, of a partly spherical form in the interior, with a spherical concentrical ball operated by a diagonal shaft connected, by means of an arm and forked joint and bush, with a vertical driving-shaft.
The ball, mortar, or basin is combined with the vertical hollow shaft, so that ores that are pulverized are carried down continuously, without intervals for charging or discharging, the falling ores being equally distributed on all sides of the ball and basin.
Fig. 4077.
 |
|
Quartz-mill with bell-shaped runner. |
 |
|
Conical quartz-mill. |
 |
|
Inclined disk quartz-mill. |
 |
|
Rolling-ball quartz-mill. |
11. Gyrating pan. This has an oscillating basin, the lower end of whose shaft is connected with and rotates in the hub of the machine.
Upon the axle or shaft is adjusted the ring or bush, which is fitted with slots to receive and hold firmly the iron bands or straps; the object of which is to support and strengthen the basin.
Within the basin is placed the ball which is to pulverize the ore.
Fig. 4078.
 |
|
Gyrating-pan quartz-mill. |
