SU1276366A1 - Impeller for flotation machine - Google Patents

Description

The invention relates to devices for flotation of various materials and can be used in the beneficiation of minerals, in the treatment of waste and industrial waters, as well as in various chemical processes. The impeller is advantageously designed for use in large flotation machines.

The purpose of the invention is to reduce the energy intensity of the impeller with an increase in its mixing and dispersing capacity due to an increase in the efficiency of ejection of air by pulp.

Fig. 1 shows a float impeller, wgg bottom; figure 2 - impeller, section.

Impeller consists of a hollow shaft

1, a hollow disk 2 and radially mounted radial nozzles 3 on the disk 2. Air ducting channels 4 are made in the disk, connecting the shaft cavity 1 and the radial nozzle cavity 3 to the disk. The disk 2 cavity communicates with the flotation machine volume (not shown) through the axial flotation hole 5 and radial holes

6. In the radial nozzles 3, the nozzles 7 are completed, the inlets of which communicate with the disk cavity.

2. Planes in which the inlets of the nozzles 7 are made are angled to the axis of the nozzles 3

and directed towards the rotation of the impeller. In the radial holes x 6, the fingers 8.

Impeller works as follows.

When the impeller rotates, a vacuum is created in the cavity of the disk 2, for which the pulp is sucked into this zone from the lower part of the phonochondrial machine. From the central zone of the impeller, a portion of the pulp through the nozzles 7 is ejected into the radial nozzles 3, where simultaneously, through the hollow shaft 1 and the channels 4 in the disk 2, air is supplied. The julp jets eject the air and disperse it into the bubbles. The pulp air mixture is accelerated in the nozzles 3 and discharged into the volume

flotation cell, in its remote areas. Another part of the pulp along with the air is ejected through the radial holes 6 in the disk 2. At the same time, the air is dispersed by the fingers 8. The pulp and air mixture from the holes 6 aerates the areas of the flotation machine closest to the impeller.

The disk 2 is made hollow and has axial 5 and 6 radial holes, which ensures uniform aeration of the entire volume of the flotation machine and efficient mixing of the aerated flotation pulp. The nozzles 7 in the nozzles 3, the inlets of which are in communication with the cavity of the disk 2 and their planes at an angle to the axis of the nozzles 3 and directed in the direction of rotation of the impeller, ensure an increase in the efficiency of air ejection from the pulp jets and an increase in the dispersing ability of the impeller. In this case, a decrease in the impeller hydrodynamic resistance to the rotational motion and a decrease in its energy intensity are observed.

Claims (2)

1. The impeller of the flotation machine, containing a hollow shaft, a disk mounted on the shaft, radially mounted nozzles on the disk, so that, in order to reduce the energy intensity of the impeller while increasing its mixing and dispersing ability by increasing the efficiency of air ejection by the pulp, the disk is hollow and, in the opposite side of the shaft, an axial hole is made, and in the nozzles there are nozzles, with the inlet openings of the nozzles co-authorized with the cavity of the disk, their planes are angled to the axis of the nozzles and directed in the direction of rotation of the impeller. 2. The impeller in accordance with claim 1, in which there are fingers in the disk between the nozzles.