DE539630C - Foam floating device - Google Patents

Description

With the foam floating devices known up to now, it is possible to swim those difficult to swim Ores as well as a sufficient throughput for difficult differential separations due to the long swimming time on a swim cell or swim unit. This by the design The deficiency justified by the devices is remedied according to the invention by

ίο that in the foaming space outside the stirring zone is a special disc-shaped guide body below the foam cover in the turbidity revolves around a vertical or approximately vertical axis, which is to avoid of eddy formations does not have any projections or interruptions protruding beyond its generators. This will achieves that the mineral-bearing air bubbles do not spread over the entire cross-section

so distribute the foam separation room, but to be diverted to the outside. The turbidity stream is compressed in this way, so that those mineral particles which for some reason are not carried out with the foam when they sink down captured again by the guide body and extremely in the due to the crowding effectively ventilated turbidity flow can be returned to rise in the foam.

In known foam floating devices are revolving around a vertical axis Disks or propeller blades are arranged in the agitation space of the device in order to achieve the greatest possible degree of vortex formation To achieve mixing of the turbidity.

In another known device are used revolving around a horizontal axis Disks for agitation of the turbidity. The panes are provided with perforations, in order to encourage air to break into the slurry and to lift the slurry towards the foam separation space. Around To reinforce this effect, the disks can also have protrusions in this device be provided. In contrast to this, the guide bodies according to the invention are in the foam formation space and not in that Agitation room of the turbidity arranged. The guide bodies are accordingly also like this formed that eddy formations that occur when using stirring devices in the agitation room just to be effected, should be avoided in order not to disturb the swimming process.

An exemplary embodiment of the subject matter of the invention is shown in the drawing.

A special body is inserted into a foam floating device of any type, which circulates below the liquid level of the sludge. In the exemplary embodiment, a vertical shaft 1 protrudes in from above

the floating vessel 2 into it. At the upper end, the shaft 1 carries a drive pulley 3 and at the lower end, lying below the liquid level 4, a disk 5, which during of the swimming process.

The swimming device is otherwise designed in the known manner. With 6 is the agitator, with 7 the drive disk of the agitator and 8 denotes the grate. The foam emerging at the upper end of the vessel 2 flows off via a drainage channel 9. Too strong eddy formation by the rotating disc must be avoided so that the swimming process can proceed undisturbed can go. For this reason, protruding beyond the generatrix of the disk Avoid projections. The shaft 1 with the disk 5 is in the height direction adjustable, see the dash-dotted representation of the disc. It can too multiple discs can be used. The shape, size, material, direction of rotation and speed of the disk can be selected as desired are, however, appropriate the type of ore to be floated as well as the other swimming conditions must be taken into account. So in some cases it has proven beneficial to pierce To use recirculating body. In other cases were in place. an ordinary one Shaft a hollow shaft and a perforated hollow body used as a circulating body, so that at the same time an aeration of the sludge could be made. The shaft of the recirculating body does not necessarily need to be perpendicular to the liquid level. The recirculating body can also be mounted on the shaft of the passed through the grate Agitator are arranged.

As an example of the operation of the device, some experiments are given below cited. It should be noted that the experiments with different ores were carried out under otherwise identical conditions (turbidity concentration etc.), 70 each

ä) with a foam floating device of known type without an additional one Circulating body according to the invention and

b) and c) with the same foam floating device after installation of a disc as Recirculating body.

Test series I

Ore type: copper ore, containing copper luster, oxidic copper ores, pyrite.

Gait: quartz.

Side rock: Kulmkieselschiefer.

Diameter of the disc: about ² J _{3 of} the box width.

a. Attempt without target Swimming time: 42 minutes

concentrate
mountains

30.35
69.65

not analyzed

0.31

Cu

Application

15.21

b. Try one with the impeller in the same sense
rotating disc

The concentrates were not analyzed.

disc
n = distance
from the rust
in mm Swimming
Time
in min Weight
Application
id mountains
% Cu content
d. mountains
•% Cu loss
id mountains
% 340
720 90
90 33
30th 77.42
74.32 0.32
0.28 17.46
14.65

c. Experiment with a disc rotating in the opposite direction to the impeller The concentrates were also not analyzed.

disc
η = distance
from the rust
in mm Swim
Time
in min Weight
Application
id mountains
% Cu content
d. mountains
% Cu loss
id mountains
% 340
720 90
90 29
33 71.13
74.92 0.25
0.30 12.54
15.85

With practically the same results in terms of enrichment and application, the Try to shorten the swimming time significantly with the target.

Test series II

Ore type: copper ore, containing copper indig, copper luster, enargite, malachite, Pebbles.

Gait: quartz, limestone, slate.

Side rock: andesite.

a product Try without a disc Cu Cu
Application.
% concentrate
mountains Weight
Application
<Vo 11.46
0.4 89.31
10.69 22.56
77.44

Raw material .. I 100.00 I 2.9 I 100.00 Swimming time: 22 minutes.

b. Experiment with a disk running in the same direction, η = 340, distance from the grate 90 mm

Diameter of the disc about ² / $ the width of the box.

product Weight
Application
% Cu
% Cu
Application
% concentrate
mountains 23.59
76.41 11.16
0.35 90.79
9.21

'Raw goods .. I 100.00 I 2.9 j 100.00
Swimming time: 16 minutes.

c. Try running in the opposite direction
Disk, η =; 720, distance from the grate 90 mm

Diameter of the disc about _^2/3 of the
Box width.

product Weight
Application
% Cu
% Cu
Application
% concentrate
mountains 20.97
79.03 13.19
o, 3 92.11
7.89 Raw material .. 100.00 3, o 100.00

Test series III

Experiments with practically the same swimming time = 15 to 16 minutes.

a. Try without a disc

product Weight
Application
% Pb
% Pb-
Application
% Zn
% Zn-
Application
% Pb concentrate
Pn-Zn middle product ..
Zn concentrate
mountains 4.35
x, i6
6.46
88.03 70.7
15.05
3, i
o, 45 79.96
4.55
5.20
10.29 3.25
12.1
44.5
.0.75 3.70
3.67
75.34
17.29 Raw material .... 100.00 3.85 100.00 3.82 100.00

Swimming time: 14 minutes.

With practically the same results in terms of
on enrichment and application is with the
Try to shorten the swimming time significantly with the target.

b. Experiment with co-rotating disk, η = 340, distance from the grate 60 mm, diameter of the disc about _^2/3 of the box width

product Weight
Application
% Pb
% Pb-
Application
% Zn
% Zn-
Application
% Pb concentrate
Pb-Zn middle product ..
Zn concentrate
mountains 4.84
1.84
7.41 '
85.91 68.2
23.4
1.65
0.25 81.13
io, 59
3.00
5.28 4.85
17.25
50.05
0.1 5.41
7.29
85.32
1.98 Raw material .... 100.00 4.07 100.00 4.35 100.00

c. Experiment with a disc rotating in the opposite direction, η = 340, distance from the grate 60 mm,
Diameter of the disk about ² J _{3 of} the width of the box.

product Ge-w.
Application
% Pb
% Pb-
Application
% Zn
% Zn-
Application
% Pb concentrate
Pb-Zn middle product ..
Zn concentrate
mountains 5.13
1.29
8.10
85.48 6.6.55
15.8
1.6
0.25 86.17
5.15
3.28
5.40 5.1
12.65
47.4
0.25 5.85
3.64
85.73
4.78

Raw material j 100.00 j 3.96 j 100.00 j 4.48 j 100.00

In the experiments with a disc, the lead yield in the lead concentrate middle product is 91.7270 or 91.32%. In addition, the zinc enrichment is significantly higher and the zinc yield is 85% compared to ys ° j ₀ in the first attempt in test series III, the one without a disc was carried out to be about io per cent better. Above all, it is essential that, with the same swimming time, the mountains (slopes) show significantly higher percentages of both lead and zinc in the experiment without a disc. The experiments with a synchronous wheel and an opposing wheel differed mainly in that the zinc enrichment in the experiment with a synchronous wheel is slightly higher than in the experiment with an opposing wheel (50.05% Zn versus 47.4% Zn).
The tests of test series I show that a shorter swimming time is required to achieve practically the same, in some cases improved results, i.e. that one can either get by with a smaller swimming device to achieve the same performance (saving energy, purchase costs, etc.) or with the same size the swimming device achieved an increased throughput.

The tests of test series III show the same device for the same swimming time or the same throughput, significantly better results in terms of output or enrichment.

Claims (3)

Patent claims: - 1. foam floating device, characterized in that in the foam formation space outside the agitation zone, a disc-shaped special guide body (s) below the foam cover in the turbidity revolves around a vertical or approximately vertical axis, the To avoid the formation of eddies, no protrusions or interruptions protruding beyond its generators having. 2. Apparatus according to claim i, characterized characterized in that the disc-shaped guide body (5) is perforated. 3. Apparatus according to claim i, characterized characterized in that the disc-shaped guide body (5) consists of a perforated There is a hollow body and is driven by a hollow shaft for the supply of air. 1 sheet of drawings