SU1438841A1 - Flotation machine - Google Patents

Abstract

The invention relates to the enrichment of minerals by the method of flo: concentration / cc adg istation and m. used in coal, metallurgical and chemical industry. The purpose of the invention is to reduce the loss of components by optimizing the conditions for unloading foam. product. The flotation machine consists of a chamber (K), foam pickers, a foam chute (RV) 3, an aerator drive, an air inlet pipe .5 fixed on the shaft 6 of the impeller 7 with radial blades 8, stator 9, circulating cup (CS) 10 s adjustable outlet windows 11. In this case, the RV 3, installed across K, covers the CS 10 and a drain threshold 14 is installed on its sides. The last S RI is installed with a gap communicated with the atmosphere along the entire length of the RV 3. Air (F.cLffi (en / npaffr 3

Description

143

The upper part of the impeller 7 is made conical. The stator -9 has a disk 12 with blades 13 on its Hi-racHeft side, which is installed on the ypoBiie impeller 7. with a gap relative to the CA 10. The gap is equal to the height of the conical part of the impeller 7 and is located opposite to it. The original pulp from K through the windows 11 CA 10 falls on the mirror of the pulp.

one

The mixture formed with coarse pulp-air is finely dispersed in the zone I, for blades 13 and blades 8 and ejected into K. Air bubbles together with mineral grains are removed by foam removers in OCC 3. Threshold 1A RV 3 provides unloading of the foam layer from the central K axis, 1 hp f-ly, 5 ill.

one

The invention relates to the field of mineral processing by flotation, in particular to flotation machines, and can be used in the coal, metallurgical and chemical industries.

The purpose of the invention is to reduce the loss of valuable components during flotation by optimizing the discharge conditions of the foam product.

FIG. 1 shows a flotation machine, general view; in fig. 2 shows section A-A in FIG. 1 in FIG. 3 - aerator, general view; in fig. 4 shows a section BB in FIG. 3; in fig. 5 - flotation on the machine, top view.

The flotation machine consists of chamber 1, foam collectors 2, foam chute 3 for collecting the concentrator, drive 4 of the aerator, air supply pipe 5 mounted on the shaft 6 of the impeller 7 with radial blades 8, stator 9 of the circulation cup 10 with adjustable inlet ports 11. Stator 9 includes a disk 12 with blades 13 located on its lower side. The disk 12 with blades 13 is mounted at the level of the impeller 7. The upper section of the circulation cup 10 is in communication with the atmosphere. The upper part of the impeller 7 is made conical. The circulating cup 10 is installed with a gap relative to the disk 12, the gap being equal in height and located opposite the conical part of the impeller 7.

The chute 3 for collecting the concentrate is provided with drain thresholds 14, which are fixed on its sides with a gap along the entire length of the chute 3. Between

The side washers 3 and the wall of the overflow threshold 14 provide distance washers 15, the thickness of which determines the size of the gap.

The flotation machine operates as follows.

When the impeller 7 rotates through the drive 4 over the shaft 6, a vacuum is created in the central part of the aerator, causing the pulp level to drop. The outgoing pulp from the chamber 1 volume falls into the mirror in the form of jets through the openings 11 in the circulating glass 10 pulp in the primepeller zone, providing its primary aeration. The coarse air-pulping mixture formed is finely dispersed in the zone between the blades 13 of the stator 9 and the blades 8 of the impeller 7, after which it is thrown into the chamber volume 1, where the flotation process takes place. The air bubbles together with the floated mineral grains form a foam layer that is removed by the foam collectors 2 into the foam chute 3. The non-floated fractions with the pulp flow into the next chamber 1. Part of the stream (Air-Puff mixture formed by the impact of the jets on the pulp surface inside the circulating glass 10, is ejected into the volume of chamber 1 through the gap between the edge of the circulating cup 10 and the ring 12 of the stator 9. At the same time, uniform air saturation of the pulp is achieved in the whole volume of the flotation machine and the shapes The flow of the foam layer directed to the foam chute 3.

Supplying the foam gutter 3 with thresholds 14 provides for unloading the froth product from the central part of chamber 1, preventing it from being pulled into the chamber 1 by descending pulp flows.

Thus, during the operation of the flotation machine, the foam product is effectively seized and unloaded and the loose particles are prevented from slipping out of the foam layer, which ultimately reduces the loss of valuable components.

Claims (2)

1. A flotation machine, including a chamber with a chute for collecting concentrate, a discharge threshold, a circulation cup with windows and an upper cut section mounted coaxially in the chamber. communicated with the atmosphere, an impeller with blades fixed on the shaft and a stator disk with blades placed on its lower surface, located at the impeller level, characterized in that, in order to reduce the loss of valuable components during flotation by optimizing The conditions for unloading the froth product, the concentrate collection chute is set across the chamber and filled with the circulating cup, while the upper part of the impeller is made conical and the circulating stack is set relative to the stator disk with a gap equal to the height of the conical part of the impeller. 2. Machine according to claim 1, characterized in that the drain threshold and the chute for collecting the concentrate are interconnected with a gas communicating with the atmosphere. gz at / I 5