RU1773483C - Device for purifying quartz raw material in ultrasound - Google Patents

Abstract

Usage: removal of impurities from the surface of minerals during mineral processing. SUMMARY OF THE INVENTION: two ultrasonic transducers are installed in opposite walls of the apparatus casing, and a double-bent partition is placed inside the casing with the possibility of movement. During operation of the apparatus, vibrations of the transducer membrane cause oscillations of the particles of quartz grains, their movement relative to each other. In combination with an upward current of water entering the loading chamber, where, when transferred from one inclined sheet to another, the movement is stabilized and the unloaded product is unloaded. 1 s.p. crystals, 1 tablet, 1 ill.

Description

The invention relates to mineral processing using an ultrasonic field,

An apparatus for cleaning quartz raw materials in an ultrasonic field is known. It contains a vertically arranged flat body, an ultrasonic transducer in the form of a plate mounted in one of the side walls of the body, on the opposite wall of which cantilever partitions are arranged parallel to each other and perpendicular to the wall, as well as fittings for supplying and discharging liquid reagent, the partitions are wedge-shaped and vertices facing the emitter, and the height of the partitions is 0.5-0.9 the distance between their base and the emitter, while the liquid inlet fitting o the reagent is located in the lower part, and the drain fitting is in the upper part of the housing.

The advantage of this apparatus lies in the fact that, when used, it is possible to create continuous, environmentally friendly processes for the enrichment of quartz raw materials. In addition, the use of less aggressive reagents and a reduction in the phase contact time (due to the use of ultrasound) leads to a decrease in the loss of the target component (enriched raw material).

The disadvantages of the known apparatus are the relatively low productivity, the unstable production of a high-quality product due to the uneven action of ultrasonic vibrations as particles of quartz pass through the ultrasound chamber, which is explained by different intensities of magnetostrictor radiation in the center and at the periphery. This leads to contamination of the raw material enriched with the products of wear of the material of the chamber walls of the apparatus or to insufficiently effective cleaning of the raw material. Also in the zone

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Ultrasonic exposure causes a significant increase in the concentration of the solid phase, and the presence of protrusions on the wall of the apparatus leads to a sharp increase in resistance to movement of the solid phase (the resistance of this section actually determines the speed of movement of the material in the apparatus, and hence its productivity).

In terms of technical nature and the achieved technical and economic effect, the above apparatus is close to the claimed device and adopted as a prototype.

The aim of the invention is to increase the productivity of the apparatus for cleaning quartz raw materials and the quality of the processed product.

The goal is achieved in that in the apparatus comprising a vertically arranged flat body, a plate-shaped ultrasonic transducer mounted in one of the side walls of the body, a loading hopper, an unloading chamber, as well as fittings for supplying and discharging a liquid reagent, install an additional ultrasonic emitter. main in the side wall of the apparatus and at least one double-concave perforated partition inside the housing between the ultrasonic transducers, and the mount is burnt out ki is effected by elastic (flexible) elements, admitting the possibility of its movement during operation.

The drawing shows schematically an apparatus for cleaning quartz raw materials in an ultrasonic field. It consists of the following main parts: a receiving hopper 1, a distribution chamber 2, an ultrasonic chamber 3, an unloading chamber 4. The pyramidal-shaped hopper 1 contains in the central part a feed pipe 5 with a shutter device 6. and also a pipe 7 for overflowing the excess liquid phase of the pulp. The rectangular distribution chamber 2 is equipped with inclined sheets 8 for delaminating the material and nozzles 9 with filters 10 for draining the waste liquid. The ultrasonic chamber 3 consists of a housing 11 and covers 12, in which emitters of ultrasonic vibrations are installed, for example magnetostrictive transducers 13, which are electrically connected to an ultrasonic frequency generator (not shown in the drawing). The bifurcated septum 14 is fastened around the perimeter with an elastic element 15 and contains through holes located in a checkerboard pattern over the septum area. The rectangular shaped discharge chamber 4 with inclined sheets comprises nozzles 16 for supplying water for washing the quartz raw material and a nozzle 17 with a shutter for unloading the purified product.

An apparatus for cleaning quartz raw materials in an ultrasonic field operates as follows.

Original quartz grain

grains of 0.5-0.1 mm in a mixture with water enters through a pipe 5 into the hopper 1. Water also flows there to liquefy. From the hopper 1, the pulp by gravity under the influence of gravity passes into the chamber 2, where, the difference from one

inclined sheet 8 on the other, is stratified along the width of the apparatus and two channels enters the ultrasonic chamber 3. Oscillations of the membrane of the transducer 13 cause oscillations of the particles of quartz grains, their

moving relative to each other. In combination with the upward current of water entering the discharge chamber, the surface of the quartz particles is cleaned. Next, the pulp goes into the discharge chamber 4, where, the difference from one inclined sheet to another, its movement is stabilized, and the purified product is unloaded.

The productivity of the apparatus for a solid product is controlled by a shutter 6 in the receiving hopper, the density of the pulp is controlled by the water entering the receiving hopper and the upward flow of water in the discharge chamber 4. The productivity of the apparatus by the pulp is controlled by the shutter of the fitting 17.

Double bent 14 partition shape

helps to equalize the amplitudes of particle vibrations throughout the zone of the ultrasonic chamber, and the mobility of the septum and the holes in it prevent the formation of stagnant zones in the apparatus and

better mass transfer due to the occurrence of transverse currents of materials through the perforated baffle, in addition, the total effect of magnetostrictors directed towards each other is created. The industrial capacity of the apparatus increases due to an increase in the cross-section and a decrease in resistance to movement of the material, while the minimum gap between the magnetostrictor plate and the partition

at the periphery it is 10-15 mm, and the maximum at the center of the magnetostrictor is 30-40 mm. The use of a movable partition further reduces the resistance of the moving grain.

Improving the quality of the processed grains is achieved by ensuring a uniform intensity of elastic vibrations of the medium throughout the magnetostrictor action zone, which is achieved by the concave shape of the partition 14; increasing the residence time of the material (grains) in the zone of maximum influence of the magnetostrictor, which is achieved by increasing the cross section in the central zone, increasing the hydraulic resistance due to the partition 14 and the appearance of currents of the material perpendicular to its vertical movement; increasing the intensity of ultrasonic exposure by arranging magnetostrictors directed towards each other.

In order to verify the efficiency and productivity of the separators, experiments were carried out on iron quartz grains treated in a 3% solution of oxalic acid at a temperature of 55 ° C. The results are summarized in table.

The technical and economic effectiveness of the proposed device is

that by improving the quality of the enriched product, the yield and quality of finished products from quartz glass increases, which, in turn, can be used to create new products for other purposes.

Claims (2)

1. Apparatus for cleaning quartz raw materials in an ultrasonic field, including a housing with an ultrasonic transducer installed in one of its side walls, a loading and unloading hopper, devices for supplying and discharging a liquid reagent, characterized in that, in order to increase the productivity of the apparatus and cleaning quality, it is equipped with an additional ultrasonic transducer mounted opposite the main one in the side wall of the housing, and at least one double-bent perforated partition, installed th inside the case between the ultrasonic transducers. 2. The apparatus according to claim 1, characterized in that the double-bent partition is movably mounted. Performance Krupskeg./h Experiment Duration Iron content: source 10 AND after processing 10% Deterioration of the walls of the apparatus, leading to contamination of the cleaned grains 70,500 100 10 Deterioration of 2 mm scallops in the central suit of the apparatus With motionless over- under vision partition koy 150 150 150 150 150 180 500 500 500 500 500 500 500 0 100 6 100 6 100 6 100 100 4 if No visible signs of septum wear.