SU1346A1 - Apparatus for enrichment of ores by flotation - Google Patents

Description

The present invention relates to apparatuses serving for enrichment of ores and used in the known process of separation or foaming. In this case, the dregs, consisting mainly of water in which the ore is suspended in powder form, are loosened in order to introduce air into it. Proper foaming reagents are added to the turbidity, with or without the use of selectivity modifying agents, so that the air introduced in this way can adhere to the metal-bearing ore particles, mainly to the rock particles, in the form of small air bubbles, which then float to the surface of the liquid. to form a strong foam capable of supporting the mineral. The present invention aims to set up an apparatus in which complete air disposal is achieved, which is provided with a reliable device for separating the mineral-supporting foam from the waste rock and which allows careful control over each stage of operations. The proposed apparatus for the concentration of ores by separation is a combination of a shaking and aeration tank, in which the ore slug in motion is loose, for the purpose of sticking into it and distributing air therein, with a sedimentary reservoir or a spitz-wall in communication with the reservoir for agitation and with a pipeline located in this tank leading directly into the thickness of the Spitskasten fluid. Thus, the air introduced into the liquid in the agitation and aeration tank flows directly from this tank into the Spitzkasten and forms foam there, which is separated as described below. In one modification of the apparatus proposed, Spitzkasten, having a top for draining foam and a conduit in the bottom of Spitzkasten to release turbidity, is provided inside with a dam to regulate the level of liquid with a partition arranged in front of the dam below and above the level of the liquid to prevent foam to the dam and, finally, the gap behind the dam leading to the pipeline for the release of turbidity. Thanks to such a device, the liquid in the Spitskasten cannot rise above the level of the dam, which is set so as to be slightly below the edge of the Spitzkasten. The height of the dam can be adjusted in accordance with the change of working conditions, but in general, this height should be such that the liquid in no way could leave Spitskasten along with foam through the rim. Thus, the rock particles suspended in the liquid turbid cannot escape from the Spitzkasten. In addition, the dam contributes to the fact that the depth of the foam over the rim can be arbitrary, and this eliminates the possibility of being carried away through the rim of rock that is in the lower foam layer along with air bubbles.

In the present invention, the Spitzkasten can be provided at the level of the foam with an inclined partition extending upwards and forwards from the side of the opposite drain rim and serving to direct the foam to this edge. The spitskasten wall, which forms the drain rim, can be positioned obliquely inward at a small distance under the rim to limit the space for the foam in the spitzkasten.

In addition, the spitzkasten can be provided with a transverse lattice, on the side opposite to the flow of foam from the agitation tank and used to form (at the front side of the lattice, i.e. on the side remote from the inlet) for the turbidity of a particular zone where the turbidity remained would be motionless. At the inlet, the turbidity is in a state of considerable agitation, but the aforementioned device, which allows free passage of turbidity through this opening, limits the excitement and gives a zone of rest in which small air bubbles can easily rise, and the rock particles descend to the bottom of the Spitzkasten. It is advisable to attach to the lattice a sloping partition, going from the bases of the lattice to the opening for the release of turbidity in the spitzkasten

and serving to direct the precipitated particles there. Further, the proposed device is supplied mainly with a number of agitation tanks and a number of Spitzkastenes adapted thereto, so that the processing of the turbidity proceeds sequentially in all the tanks of the series until the final floating of the entire metalliferous material. For this, the bottom of each spitskasten can communicate with the bottom of the corresponding tank for agitating the pipeline (to maintain the circulation of turbidity through this pipeline) through the tank for agitation and through the hole leading from the wall to the bridge; The second pipeline can go from the bottom of the spitskistan to the bottom of the next shaking tank so that a part of the ore dregs does not participate in the circulation, but passes through the whole row of tanks.

The invention is illustrated in the drawing, in which FIG. 1 depicts a front view (partly in the separation of a series of agitation tanks and spitzkastenes) of one form of an embodiment of the device; FIG. 2 is a cross-section along line 2-2 of FIG. 1, fig. 3 is a cross-section along line 3 - 3 of FIG. 1 (in both cases, x-view in the direction of the arrows), FIG. 4 is a transverse central section of a self-contained part of a modified device; FIG. 5-part device, FIG. 6 is a cross-section of another modification.

The apparatus shown in FIG. 1, 2 3 consists of a number of agitators, the number of which can be arbitrary and which are indicated by 7, 2.3 n 4. The boxes are mostly wooden; In each of them, an agitator 5 is placed, which sits on a vertical spindle 6 and is rotated from above by means of a bevel gear transmission or otherwise from the main shaft 7, which runs along the whole row of boxes. The agitator 5 is in the form of a propeller, through which the turbidity is drawn upward into the shaking box through an opening in the bottom of the latter and is agitated inside the box so that the air drawn from above is mixed. From each shaker box the dregs pass through

an opening 8 in its wall directly in the spitskasten 9. The back wall of the latter is formed by one of the walls of the shaking box, extended downwards, under the bottom of the box, so that the bottom of the spitskasten lies below the level of the bottom of the box. The front wall 9 of the Spitskasten is tilted forward, starting from the bottom, so that the Spitzkasten gets a V-shape, contributing to the direction of ore particles deposited in it to the turbidity outlet JO. The upper edge of the front wall of the Spitskasten is a drain rim 77. Each of the shaking crates has a special Spitzkasten chamber separated from the adjacent partition 72. The trough 75 serves to receive the foam flowing through the rim 77 and runs along the entire front wall of the spitzkasten. The mist coming into the nip from the whipping box through the opening 8 is directed downwards by a cap, which in the device shown has the shape of a box J4 with a notch in the front wall 75 at the bottom forming a wide opening 16 for the passage of turbidity. The front wall 75 of the cap extends past the last and goes across the entire Spitzkasten. The lower edge of this wall is significantly below the level of the liquid in the Spitz-stone and is approximately at the same level with the bottom of the cap, between the bodies, as its upper edge protrudes above the level of the foam. Behind this wall there is a collapsible dam 77, which, as it were, constricts the Spitz-stone between the side walls and passes down to the bottom of the latter. A valve J8 is located in the bottom of the dam, in front of the outlet for the turbidity 70, which communicates the lower part of the spitskasten with the space behind the dam and through which the turbidity after processing goes to the outlet W. The outflow of the turbidity can be regulated by the flywheel the screw rod 2 (to which the hanging cap 27 of the J8 valve is attached.) If the flow rate of turbidity in the Spitzkasten from the shaking drawer exceeds the outflow rate, the liquid level rises The purpose of the dam 77 is to eliminate the rise of the liquid level to the point when the rock begins to flow through the rim 77. The height of the dam is calculated so that it is slightly lower than the rim 77; the liquid has access to it behind the front wall 75, the passage below its bottom by the edge, while the foam is kept from the dam by this wall 75. The front wall 75 is lowered down to the lower part of the Spitskasten in order to, if possible, prevent the bubbles of foam from rising into the space between it and the dam. When the liquid level in the Spitskasten rises above the level of the dam, it flows over the edge and then flows down through the channels on each side of the box J4 behind the dam to the outlet Y. In these channels (due to suction through hole 70) the water level is normally lower than in the main spitzkasten chamber. The upper edge of the dam consists of a series of detachable bars 22, 23, 24, which lie at the ends in the grooves formed by wooden crossbars 27, 28 attached to the walls of the spitskasten. Above the lip 77, a rotating blade 29 is reinforced, which serves to remove the foam that forms from it. The outlet 70 of each Spitskasten goes into the channel 30 to release the turbidity leading to the bottom of the next row shaker, where it opens under the agitator 5; Thus, the dregs processed in one shaking box and the Spitzkasten belonging to it goes into the next box for further processing. If necessary, in order to achieve the circulation of ore on a certain path between each spitskastenom and the corresponding shaking box, a second pipeline can be placed or a branch 31 leading from the bottom of the spitskasten to the bottom of its own shaker box.

The apparatus of the apparatus shown in FIG. 4 is generally similar to that described and shown in FIG. 1 through 3 and consists of an agitator box 2, agitator 5 and spitz-wall 9, with a hole 8 serving for communication between box 2 and spitz-wall R. Hole 8 is covered by a cap 32 that guides the flowing slush down; against this cap is a lattice device, consisting of horizontal bars 34, 35, tightening the side walls of the crate and supporting a number of vertical posts or bars 36 arranged in a slighter order, as shown in FIG. 5. This grating serves as a barrier through which the turbidity can pass freely, but which reduces the agitation area of the cap, due to the rapid influx of aerated turbidity, and gives a zone of calm liquid at the front side of the lattice, i.e., the side opposite to the inlet for turbidity . From the lower edge of the lattice to the outlet opening W there is an inclined wall 37, which serves to direct the turbidity and ore particles deposited in the quiet area of the Spitzkasten to the outlet opening. In order to avoid accumulation of sediment on the partition 37 in it at the bottom edge, you can arrange one or more holes 3S. Above the bell is a sloping retaining wall 39, going forward from the back wall of the scissors, and protruding above the level of the foam; this wall serves to direct the rising foam to the rim 77 and causes it to flow by gravity through the rim into the trough 75. The wall of the nipple wall below the rim 77 with its small part, as shown in the drawing, is tilted inward to limit the space occupied by the foam for 34-36 , put a few inclinations faster and more energetic drift. The modification of the device shown in FIG. 6, in major parts similar to that shown in FIG. 4, has a grill 36, a retaining wall 39 and an inclination inward in the upper part of the front plank of the scissors at the bead. But the parts are arranged so that they occupy less space in the vertical direction; To this end, the bottom of the Spitzkastan is located at the same height as the bottom of the agitator box, and the pipeline for the inlet of turbidity connecting the anchors to the next agitator row, is arranged under the false bottom 40 in these boxes. SUBJECT OF THE PATENT. 1. An apparatus for enrichment of ores with flotation, characterized in that it is provided with a bell-box with holes and J6, a collapsible dam 77 with removable bars 22, 23, 24 and a wall 75 for retaining foam in the Spitskasten (Fig. 1-3). 2. The modification of the apparatus specified in p. 1 (FIG. 4), characterized by using the wall 39 instead of the dam, and a vertical grid with three rows of vertical 36 and two bars of horizontal bars 34 (FIG. 5) mounted on the wall 37. 3 The modification of the apparatus specified in p. 1, characterized by the use of sloping walls 32 to 34 to the grille (Fig. 6).

FIG. 6

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