SU1085629A1 - Hydraulic classifier - Google Patents

Abstract

1. HYDROCLASSIFIER for the separation of mineral raw materials, containing a discharge device, a housing consisting of a receiving-separating and classification chambers, an inlet with a diffuser, a drain nozzle, a float installed with the possibility of vertical movement, and a water supply nozzle, characterized in that in order to increase reliability of operation and accuracy of classification due to elimination of breakages, float and uniform concentration of the material in the classification area, the hydro-classifier is equipped with diffuser guide impeller and elastic diaphragm connecting the housing with the discharge device. 2. The hydro-classifier according to claim 1, characterized in that the discharge device consists of accumulative and compensating tanks, an air-accumulating chamber with a plunger, a lever-hinge mechanism and swivel clamps, while the compensating capacitance is connected to the accumulating and classifying containers and (I plenum chamber piping system. 00 С71 О5 Ю СО

Description

The invention relates to the enrichment of minerals and is intended for the fractionation of fine-grained mineral raw materials.

Known hydraulic classifier, including vertical cylindrical classification chamber, inlet, diffuser, drain pipe and annular manifold 1.

The disadvantages of this hydraulic classifier are the low accuracy of the separation of fine-grained raw materials, the relatively high water consumption and the difficulty of unloading the finished product.

Closest to the invention is a hydraulic classifier for the separation of mineral raw materials, including a discharge device, a housing consisting of receiving and separating and classification chambers, an inlet with a diffuser, a drain nozzle, a float mounted for vertical movement, a water inlet 2.

The disadvantages of the known hydraulic classifier are low reliability of its operation due to frequent breakdowns of the float with uneven loads on it, as well as low classification accuracy due to uneven concentration of the material in the classification zone.

The aim of the invention is to improve the reliability of operation and the accuracy of classification by eliminating float breakages and a uniform concentration of material in the classification zone.

The goal is achieved by the fact that a hydroclassifier for the separation of mineral raw materials, containing an unloading device, a body consisting of receiving-separating and classification chambers, an inlet pipe with a diffuser, a drain pipe, a float installed with the possibility of vertical movement, and a water inlet pipe, hydroclassifier it is equipped with a diffuser installed in the diffuser and an elastic diaphragm connecting the housing with the discharge device.

In addition, the discharge device consists of a cumulative and compensating tanks, an air-accumulating chamber with a plunger, a lever-hinge mechanism and swivel clamps, with the compensating capacity connected to the cumulative and classifying containers and the air-accumulating chamber with a piping system.

FIG. Figure 1 shows the hydraulic classifier for the separation of mineral raw materials, a general view; in fig. 2 is a top view impeller.

The hydroclassifier consists of a housing 1 with a receiving / separating chamber 2, which includes an inlet nozzle 3, a diffuser 4, a CvIivny nozzle 5, a pull 6, and a drive 7. A diffuser 8 is installed in the diffuser 4. At the outlet of the diffuser 4 there is a float 9, mounted 5 with the possibility of vertical movement along the guide rod 10.

In the lower part of the housing there is a classification chamber 11, equipped with a water inlet nozzle 12 equipped with an electric shutter 13. The housing 1 is connected to a discharge device with an elastic diaphragm 14.

The discharge device hydroclassification consists of a storage tank 15, in which the valve 16 is installed.

5 The storage tank 15 is terminated by an elastic nozzle 17, the output section of which is adjusted by a lever-hinge mechanism 18 with swivel clamps 19. In addition, the hydroclassification discharge device includes a compensating tank 20 fixed with the possibility of vertical movement on the storage tank 15 using a lever-balance system 21 seconds counterweight 22, and this system can be equipped

5 by device 23 for remote control. Both tanks (15 and 20) are connected by a system of pipelines 24 with an air-accumulating chamber 25, in the upper part of which a plunger 26 is installed.

The compensating capacitance 20 is connected

0 with a piping system 24 using an elastic diaphragm 27.

The device works as follows.

The initial slurry is fed through the inlet nozzle 3, which passes downward into the diffuser 5, inside which the guide impeller 8 is installed. The guide impeller 8 ensures reliable operation and accuracy of classification. This is achieved by performing a guide.

Q impeller 8 of the blades inclined at an angle, ensuring the curl of the downward flow of the initial slurry, which leads to a uniform concentration of the loaded material throughout the diffuser, reducing the load

5 to the float 9 installed under the diffuser 4 and to uniformly distribute the material to be separated over the volume of the receiving-separating chamber 2.

Pass the diffuser 4 and the impeller 8, the downward flow of the slurry reduces the speed

 and acquires a rotational motion, and having met with the float 9, it enters the annular cavity of the receiving-separating chamber 2 and from the descending one becomes ascending. Thanks to the rotation thread

5 is evenly distributed around the annular cavity. At the same time, its speed decreases and the grains of a solid material "hang", as it were, creating the so-called "boiling"

the layer in which they are separated by size. Small and light grains are carried away upwards and out of the apparatus through the discharge pipe 5. Large grains soar in the lower part of chamber 2 and, subject to the law of concentration diffusion, rush into the region of their lowest concentration, i.e., into the peripheral zone of the classification chamber I, where a stream of clean water flows through the water inlet 12 at a speed equal to the speed of water in the receiving and separating chamber 2. Since the speed of the upward flow of water is less than the speed of falling of large grains, they descend towards this flow.

The rotational movement of water in the classification chamber 11 provides a more uniform distribution of the grains of a large product over its cross section, which contributes to greater classification efficiency.

Having passed the classification chamber 11, large grains enter the unloading device, the storage tank 15 of which, under the action of the counter load 22, occupies the uppermost position until the large fraction entering it reaches the level established by the counter load 22 (approximately 2/3 the height of the storage tank 15).

The discharge elastic pipe 17 of the accumulation tank 15 is up to this point blocked by swivel clamps 19, and the compensating tank 20 occupies the lowest position. As soon as the volume of granular material exceeds the established level in the storage tank 15, it

is lowered, and at the same time the lever-hinge mechanism 18 expands the elastic discharge pipe 17, through which the product is unloaded.

With the cessation of supplying the initial hydraulic mixture to the hydroclassifier, the flow of granular material into the storage tank 15 is stopped, and it rises under the action of the counterweight 22. At the same time, the elastic unloading nozzle 17 0 T is covered by the swivel clamps 19 and the product is not unloaded.

The replacement of the elastic discharge pipe 17 takes place without emptying the classifier, for which the sand unloading process is stopped by lowering the valve 16 to its lower position.

The change in pressure inside the apparatus does not affect the process of unloading the finished product, since the change in pressure in storage tank 15 Q is equalized by a corresponding change in pressure in the compensating tank 20.

The air storage chamber 25 serves to accumulate and remove air that enters it from the system. We have pipelines 24 when the apparatus is started up and operating. 5 On entering the air storage chamber 25, the air forms an air liner which interferes with the process of pressure compensation in the containers 15 and 20. The air is removed from the chamber 25 by means of a van 26.

The economic effect of using a hydroclassifier with a discharge device is 6 thousand rubles.

Claims (2)

1. HYDROCLASSIFICATOR for the separation of mineral raw materials, containing a discharge device, a housing consisting of a receiving-separation and classification chambers, an inlet pipe with a diffuser, a drain pipe, pop benches installed with the possibility of vertical movement, and a water supply pipe, characterized in that, in order to improve the reliability and accuracy of the classification by eliminating breakdowns, float and uniform concentration of material in the classification zone, the hydroclassifier is equipped with a diffuser They are guided by a guide impeller and an elastic diaphragm connecting the housing to the unloading device. 2. Hydroclassifier by π. 1, characterized in that the discharge device consists of a storage and compensating containers, an air storage chamber with a plunger, a lever-hinged mechanism and rotary clamps, while the compensating capacity is connected to the storage system and classification containers and air storage chamber by a piping system.