RU2190477C1 - Gear to clean particles of mineral stock from surface impurities - Google Patents

Abstract

FIELD: mining, chemical, metallurgical and some other branches of industry for beneficiation of stock and its cleaning from surface impurities. SUBSTANCE: gear has hydrocyclone, intake facility, cleaning chamber in the form of mixing chamber, jet-type pump built-in intake facility for tangential injection of stock into cylindrical part of hydrocyclone, tertiary treatment chamber. The latter comes in the form of ring chamber linked by branch pipe of tangential inlet to mixing chamber positioned in cylindrical part of hydrocyclone and is formed by circular partition separating cylindrical part of hydrocyclone from its conical part and by branch pipe placed concentric on drain branch pipe of hydrocyclone. EFFECT: raised efficiency of cleaning and separation of mineral stock, simplified design of gear. 1 dwg

Description

 The invention relates to a technique for the enrichment of mineral raw materials, and in particular to apparatus for cleaning mineral raw materials from surface impurities, in particular to removing films of iron oxides from the surface of quartz sand grains used in the glass industry, removing crusts of clay minerals from the surface of ilmenite, removing kimberlite rocks from surface of diamond crystals, and can be used in mining, chemical, metallurgical and other industries.

 Known devices for the enrichment and purification of mineral raw materials from surface impurities or conglomerates due to the disintegration-rubbing of the material on the walls of the separation chamber by centrifugal force created by impellers in successive blocks (AS USSR 1535629, class B 03 V 5/02, publ . 15.01.90), or due to the impact and ultrasonic impact on the material in a drum washing machine (a.s. USSR 1811899, class B 03 V 5/00, publ. 30.04.93).

 Also known is a production line for cleaning particles of mineral raw materials from surface impurities, including a disintegrator, an ultrasonic cleaning device and a hydrocyclone for separating pulp (A.I. Shulgin and others. Acoustic technology in mineral processing. / Ed. BC Yamschikova. M .: Nedra, 1987, pp. 90-93).

 The disadvantage of these devices is their high energy intensity and design complexity.

 The closest in technical essence and the achieved result to the claimed device is a cylinder-conical hydrocyclone having a jet pump (injector) integrated in the receiving device, in which the disintegration of the separated granular material is carried out, i.e. destruction and scouring of the least durable surface impurities, as well as having a chamber for additional washing-cleaning of the material (AS USSR 751441, class B 04 C 5/08, B 03 B 5/34, publ. 30.07.80).

 The disadvantage of the closest analogue is the low efficiency of cleaning raw materials from surface impurities.

 The technical result consists in increasing the efficiency of cleaning raw materials from surface impurities while simplifying the design of the device.

 The specified technical result is achieved by the fact that in the known device for cleaning particles of mineral raw materials from surface impurities, including a hydrocyclone, a receiving device, a cleaning chamber in the form of a mixing chamber of a jet pump built into the receiving device, for tangential input of raw materials into the cylindrical part of the hydrocyclone, a treatment chamber , according to the invention, the after-treatment chamber is made in the form of an annular chamber connected by a tangential input pipe to the mixing chamber, placed in a cylindrical part of the hydrocyclone and is formed by an annular partition separating the cylindrical part of the hydrocyclone from its conical part, and a pipe located concentrically to the drain pipe of the hydrocyclone.

 This set includes features, each of which is necessary, and all together are sufficient to achieve the specified technical result.

 A device for cleaning particles of mineral raw materials from surface impurities is illustrated in the drawing, which shows its diagram.

 The device consists of a receiving device 1, in the bottom part of which a jet pump is integrated, comprising a jet nozzle 2 for supplying a working agent, an ejection gap 3 and a mixing chamber 4, which is a cleaning chamber. The aftertreatment chamber 5 is located in the cylindrical part 6 of the hydrocyclone 7 and is formed by an annular partition 8 separating the cylindrical part 6 of the hydrocyclone 7 from its conical part 9, the outer wall 10 of the cylindrical part 6 of the hydrocyclone 7 and the pipe 11 located concentrically to the drain pipe 12 of the hydrocyclone 7. The height of the pipe 11 should provide the necessary time for high-quality treatment of particles of mineral raw materials while they are in the annular chamber.

 To create a rotating pulp stream, the aftertreatment chamber has a tangential input made in the form of a pipe 13 connected to the outlet pipe of the mixing chamber 4. The tangential input pipe 13 is located directly above the annular partition 8. The conical part 9 of the hydrocyclone 7 is also equipped with a sand pipe 14 for outputting cleaned from impurities of particles of mineral raw materials.

 The device operates as follows. The prepared pulp is fed to receiving device 1. If mineral extraction is carried out by development systems using hydromechanization means, for example, with hydraulic monitoring erosion of minerals in the mining face, then pulp resulting from erosion can be fed to receiving device 1. A working agent is supplied to the jet pump under pressure - air or water, which, leaving the jet nozzle 2 at high speed, passes into the mixing chamber and draws in (ejects) the pulp from the receiving device 1 through the ejection gap 3.

 In the mixing chamber 4 in the cavitation mode, the primary destruction of impurities occurs due to the hydrodynamic effect of the jet on the particles of mineral raw materials, collision of mineral particles and mutual friction (scrubbing) and their separation from mineral particles. Next, the pulp due to the energy supplied by the jet pump, enters for subsequent processing and the final destruction of surface impurities in the after-treatment chamber 5.

 In the after-treatment chamber 5, the generated annular turbulent flow causes friction (scuffing) of particles against each other and against the walls of the annular chamber, which leads to the final destruction of surface impurities. Next, the rotating pulp flow along the annular gap between the drain pipe 12 and pipe 11 enters the conical part of the hydrocyclone 7, where the pulp is divided into particles of mineral raw materials, purified from surface impurities that are removed from the hydrocyclone 7 through the sand pipe 14, and impurities that are removed from a hydrocyclone through a drain pipe 12.

Claims (1)

 A device for cleaning particles of mineral raw materials from surface impurities, including a hydrocyclone, a receiving device, a cleaning chamber in the form of a mixing chamber of a jet pump built into the receiving device, for tangential input of raw materials into the cylindrical part of the hydrocyclone, a post-treatment chamber, characterized in that the post-treatment chamber is made in in the form of an annular chamber connected by a tangential input pipe with a mixing chamber, is placed in the cylindrical part of the hydrocyclone and is formed by an annular partition, separating her cylindrical part of the hydrocyclone from its conical part, and a pipe located concentrically to the drain pipe of the hydrocyclone.