DE575670C - Process and device for the preparation of ores and similar materials using the floating process - Google Patents

Description

ISSUED ON
2. IAI1933

REICH PATENT OFFICE

PATENT LETTERING

CLASS 1c GROUP

ic K 42.

Patented in the German Empire on November 23, 1930

It is known that to successfully carry out the swimming procedure a. Good stirring and simultaneous gassing, mostly by means of air, is necessary and that, furthermore, in those devices in which the space for ventilating and stirring the slurry is separated from the space into which the slurry is passed for the purpose of foam separation, rapid circulation of the slurry is required between the mentioned rooms is necessary.
In such devices, the circular

.. tion by either a located in the lower part of the agitation space stirrer or the aeration device, the ¹ at the same time as a lifting device is used (air lift). At. the devices with mechanical

.. agitation shows the inconvenience of high power consumption and stirrer wear, because ao the stirrer has to work against a certain hydrostatic pressure and at its Arrangement at the bottom of the agitation vessel vortex formations "are inevitable. In addition In many cases the strength of the agitation and the ventilation are not independent of each other to adjust. This also results in an unnecessarily high power consumption.

In agitation by means of air or gas, a large excess of these agitating agents is necessary in order to to evoke sufficient agitation as well as the ventilated turbidity from the agitation room to be transported into the foam room. In this case, too, there is a high expenditure of energy necessary. In addition, the large air or air space required for agitation Gas supply for the actual swimming process can be undesirable or even disruptive can.

The invention is a method for 4 " Processing of ores and similar materials by the swimming process is based on that takes place in an agitation room that communicates with one or more foam rooms, with circulating agitation means be turned. To avoid the Erwähiten evils and to achieve a special According to the invention, the turbid surface is caused by favorable gas flow and foam formation Agitation means reaching into the sludge and hurling the upper layer of the sludge upwards. (e.g. agitator blades, screws or the like) increased and thereby · 'into the effective range brought further agitation means. . "■ ■.

*) The patent seeker indicated the following as the inventors:

Dr.-Ing. Hubert Ehrans'and Dr. Otto Crcifelds in Magdeburgs,

iüiLMSllf

In a known swimming pool preparation device, the sludge is agitated in an agitation room by beater arms. The developed Foam rises in the agitation room and is from above the cloudy level circumferential flapping arms are thrown into the foam spaces on the side. There is no increase in this device the cloud surface and agitation of the cloud layer thrown up in the sense of the Invention instead. In another known swimming treatment device is only one individual propeller reaching into the slurry is provided. There is no agitation here the turbidity takes place in the thrown-up state.

In the drawing are three devices for performing the method according to Invention shown for example, namely ao show

Fig. Ι and 2 a device in vertical section and in the associated top view, with a part removed, and Figs. 3 and 4 each show a different embodiment in vertical section.

The agitation room 1 of a swimming vessel is arranged on both sides of this room Foam boxes 2 in communication through openings provided at the bottom of these boxes. A vertically standing shaft 3 is introduced into the space 1 from above, on the wing 4 are attached, which dip only so far into the turbidity when the device is at rest, that they are covered by this. Above the wing 4 are further wings 5 on the Shaft 3 fixed, in such a way. Distance from the wings 4 that of these thrown turbidity is detected by the wings 5, further raised and agitated. The agitated slurry is thrown into the foam boxes 2 on the side. To the To limit the upward movement of the agitated pulp, a disk 6 is located above the wings attached to the shaft 3. Since the disk 6 rotates with it, the centrifugal effect is the wing 5 is not affected by it, as it would be if the flung up Cloudy would be deflected sideways by a fixed surface. Above the stirring area is to intercept the outside splashing slurry arranged a hood 7, which with its lower edge almost up to the The surface of the slurry in the foam box.

To calm the surface of the sludge, damping or guiding devices can be used in a known manner 8 can be installed in the foam boxes. The device 8 shown in Fig. 2 consists of laterally arranged, one Constriction of the foam flow causing walls that a receding before the Prevent overflow edges 9 of the device standing foam and at the same time the Regulate the flow rate in the foam space as required.

The foam is discharged through channels 10. The good not included in the foam sinks to the floor in the foam box and then returns to the mixing chamber 1. ·

In the device described, the required to saturate the pulp can Amount of gas supplied only by the impact of air by means of the wings will. However, a special gas supply can also be added at a suitable point take place, e.g. B. by a pipe protruding into the rising turbidity flow 11. For the purpose of gas supply could you also train the shaft 3 as a hollow shaft and extend it downwards.

In Fig. 3 a device is shown without an additional gas supply. About constipation To prevent the connection channel between the foam boxes and the stirring room is in the lower part of the stirring room a clearing blade 12 is provided, which is attached to the downwardly extended shaft 13 of the agitating blade is attached.

In the device according to Fig. 4, the agitation space 14 is without interconnection a connecting channel directly connected to the foam boxes. Below the Agitation room is a gas supply channel 15, which through nozzle-like openings 16 with the Agitation room communicates. Otherwise, the design corresponds to this device those according to Fig. 1 and 2.

Instead of the two foam boxes, a foam box can also be arranged on only one side be. The number of impellers can be different; they could also be different, e.g. be trained as snails,

Claims (4)

Patent claims: i. Process for processing ores and similar materials using the floating process in an agitation room that communicates with one or more foam rooms, using circulating Agitation means, characterized in that the surface of the sludge bineh-dipping into the sludge, the upper one. Agitation means (e.g. impellers, screws) that are thrown upwards through the layer of the sludge ο. Like.) and thus in the sphere of action of other agitation means. " is brought. 2. Device for carrying out the method according to claim 1, characterized in that that on a common vertical shaft (3 or 13) agitator blades (4, 5) ο. Like. Are arranged so that part of the agitator blades (4) extends into the sludge, while the other part is above the cloudy surface. 3. Apparatus according to claim 2, characterized in that above the on the vertical shaft (3 or 13) arranged agitator blades (4, 5) 0. The like. A known per se rotating deflection disc (6) is arranged. 4. Apparatus according to claim 2, characterized in that in the lower part of the Agitation space a known rotating impeller (12) is provided. 1 sheet of drawings