DE3634903A1 - Flotation device - Google Patents

Abstract

For improving the flotation flow conditions, the injectors, which preferably dip vertically into the suspension to be floated, are arranged in the corners of a polygonal connection; in the case of a flotation container of angular, for example rectangular, cross section, the corners of this flotation container are situated at at least some of the polygon corners.

Description

The invention relates to a flotation device accordingly the preamble of claim 1. Such flotation device is known from DE-B 19 14 392.

With this facility device are arranged in two horizontal planes, the injectors the suspension essentially in the horizontal direction with air introduce mixed into the flotation tank. This ent there is a flotation flow, the core of which is a hollow cylinder, which is located centrally within the flotation tank. The However, the foam is essentially drawn off by suction facilities.

The object of the invention is a flotation device specify where the foam is removed in a simple manner can.

This object is achieved with a device of the initially mentioned type by the characteristics of the characteristic Part of claim 1 solved.  

Downstream due to the symmetrical arrangement of the injectors Mixing tubes give you favorable flow conditions for the Suspension to achieve a good flotation effect and on on the other hand, a favorable foam removal through the in Surface area of the suspension existing flow ratio nisse causes. One comes practically without any additional directions, in particular without air extraction devices. Here the use of an individual is particularly advantageous Flotation cell-forming sections divided lying Cylinders. This results in one in the lowest part of the Cylinder extraction of the good material is particularly good constant flow conditions for flotation.

Although it is a flotation device from DE-OS 27 12 947 knows, which uses a central foam exhaust pipe becomes. However, the foam is air over the upper here area of the suspension towards the inlet opening of the Blown foam exhaust pipe. It is just a single injector end point at the circumference of the respective flotation cell, so that the suspension flow contributes nothing to the foam transport wearing. The use of injectors with vertical mixing tubes is also known from DE-A 31 44 387.

The invention is based on one in the drawing in two cross sections perpendicular to each other example explained.

In this embodiment, a lying cylinder is used, which is divided by means of partitions 5 into individual sections which form the individual flotation cells 1 , 1 '. The individual, vertical mixing tubes 2 , 2 ', etc. have air supply pipes 6 and preferably also a central Luftzu supply pipe 7 . The injector effect is achieved through a constriction in this area of the mixing tubes in order to draw in the air. A central feed pipe 3 feeds the suspension to the individual mixing pipes. At the bottom of the individual flotation cell is the discharge opening 9 for the cleaned suspension, which is fed via line 8 to the next cell.

It can be seen that a favorable flotation flow is achieved without special internals within the flotation container, such as guide walls. One could, however, by a baffle 10 , which is installed in the feed line 3 in front of the distribution point with respect to the mixing tubes 2 , 2 ', etc., improve the even distribution of the suspension on the various mixing tubes.

This suspension is divided into several mixes pipes or injectors also have the advantage that a better Air mixing performance is possible as if you had only one would use a single injector.

Claims (3)

1. Flotation device, consisting of at least one cell with injectors for supplying air mixed Sus pension, characterized by several, essentially evenly distributed, in the corners of a polygon, of which at least the majority, if necessary, in the angular shape of the flotation container ( 1 , 1 ', etc.) be conditional corner rooms, arranged, the injector-Luftan suction point or intake point, below the latter points essentially vertically lengthening mixing tubes ( 2 , 2 ' etc.) with deflection of the flow at the outlet of the same essentially in the horizontal direction and a central, essentially vertical foam exhaust pipe ( 4 ). 2. Flotation device according to claim 1, characterized by the formation of the flotation container ( 1 ) or the respective gene cell as a section of a lying cylinder, wherein a plurality of cells are connected in series with vertical partition walls ( 5 ) between them. 3. Flotation device according to claim 2, characterized in that the outlet end of the mixing tubes ( 2 , 2 'etc.) is between a third and a fifth of the diameter of the flotation container below the upper edge of the foam extraction pipe ( 50 ).