Method for softening clay pellets in hydrodynamic slurry pipeline

Abstract

FIELD: mineral concentration.SUBSTANCE: present invention can be used for washing gold-bearing sands, including clay pellets in placer gold deposits, as well as in other branches of industry. The method for softening clay pellets in a hydrodynamic pulp pipeline includes softening clay pellets during the process of transporting pulp in a pulp pipeline made in the form of a pipe, by periodically colliding the moving clay pellets with swirlers located periodically along the pipe of the pulp pipeline and forming a repeating swirling flow in the liquid. To form a repeating swirling flow in a liquid, swirlers are made in the form of a pipe with arranged segments and working guide plates welded to its inner surface, made in the form of an irregular trapezoid with an inclined side at the entrance of the jet. The direction of the repeating swirling flow is changed by directing it with plates in segments at an angle to the longitudinal axis of the pipe and turning it around the axis of the slurry pipeline, in one segment in one direction, and in the other segment in the other direction.EFFECT: increase in the efficiency of softening clay pellets.1 cl, 3 dwg

Description

[0001] Technical field

[0002] The invention relates to mineral enrichment and can be used for washing gold-bearing sands, including clay pellets, at placer gold deposits, as well as in other industries.

[0003] Technology Level

[0004] A method is known for extracting gold during hydromechanized development of clay placers (patent RU 2259886, IPC B03B 5 / 00, Published: 10.09.2005 Bulletin No. 25), which includes washing, disintegration, gravity enrichment in deep-filling sluices, screening, gravity enrichment in shallow-filling sluices, rinsing of concentrate from collecting surfaces and finishing of concentrate, wherein after washing and disintegration in a hydraulic cradle, softening of clay pellets is performed during the process of transporting pulp in a pulp pipeline by periodic impact of moving clay pellets on metal pins installed in the lower part of the pulp pipeline.

[0005] The disadvantage of the known method is the low efficiency of softening clay pellets.

[0006] The closest in technical essence to the proposed method is the use of a hydrodynamic pulp pipeline device (patent RU 82597, IPC B03B 5 / 02, B22C 5 / 00, B65G 53 / 30. Published: 10.05.2009 Bulletin No. 13), including a housing in the form of a pipe with swirlers located periodically along the pipe to form a repeating swirling flow in the liquid and soften the sand-clay pellets in the pulp.

[0007] The disadvantage of the closest object is the low softening of clay pellets.

[0008] Disclosure of invention

[0009] The technical result is to increase the efficiency of softening clay pellets due to the repeated swirling of the flow with a variable direction during the transportation process.

[0010] The technical result is achieved in a method for softening clay pellets in a hydrodynamic pulp pipeline, including softening the clay pellets during the process of transporting pulp in a pulp pipeline made in the form of a pipe, by periodically colliding moving clay pellets with swirlers located periodically along the pipe of the pulp pipeline and forming a repeating swirling flow in the liquid, wherein in order to form a repeating swirling flow in the liquid, the swirlers are made in the form of a pipe with arranged segments and working guide plates welded to its inner surface, made in the form of an irregular trapezoid with an inclined side at the inlet of the jet, while changing the direction of the repeating swirling flow by directing it with plates in segments at an angle to the longitudinal axis of the pipe and turning around the axis of the pulp pipeline, in one segment in one direction, and in the other segment in the other direction.

[0011] Distinctive features are:

[0012] To form a repeating swirling flow in the liquid, the swirlers are made in the form of a pipe with arranged segments and working guide plates welded to its inner surface, made in the form of an irregular trapezoid with an inclined side at the entrance of the jet. This technological scheme increases the efficiency of softening clay pellets due to the repeating swirling of the flow with a variable direction during transportation with high hydrodynamic turbulence;

[0013] change the direction of the repeating swirling flow by directing it with plates in segments at an angle to the longitudinal axis of the pipe and turning it around the axis of the pulp pipeline, in one segment in one direction, and in the other segment in the other direction, this increases the efficiency of softening clay pellets due to the repeating swirling of the flow with a variable direction and turbulence of the flow during transportation.

[0014] A comparative analysis of the features of the claimed solution with the features of the prototype and analogues indicates that the claimed solution meets the criterion of “novelty”.

[0015] Brief description of drawings

[0016] Fig. 1 shows a frontal section and a diagram of the operation of the method for softening clay pellets in a hydrodynamic slurry pipeline, including: 1 - an element of the slurry pipeline body; 2 - a swirler of the driving medium, in the form of pulp, in the feed system, directed along the surface of the pipe in one previous segment in one direction; 3 - a channel of the slurry pipeline, the passage of sand-clay pulp, behind the previous swirler; 4 - a swirler of the driving medium, subsequent in the feed system, the elements of which, in the form of working plates, perform the function of a softener, directed along the surface of the pipe in another subsequent segment in the other direction; 5 - a channel of the slurry pipeline, the passage of sand-clay pulp, behind the subsequent swirler; 6 - a working guide plate of the swirler, made with streamlined shapes, in the form of an irregular trapezoid with an inclined side at the entrance of the jet.

[0017] Fig. 2 shows section A-A from Fig. 1 of the operation diagram of the method for softening clay pellets in a hydrodynamic pulp pipeline, including: 1 –– element of the pulp pipeline body; 6 – working guide plate of the swirler and softener; 7 – active part of the pulp flow swirl region; 8 – passive part of the pulp flow swirl region.

[0018] Fig. 3 shows a section B-B from Fig. 1 of the frontal section of the hydrodynamic pulp pipeline, including: 6 - a working guide plate of the swirler and softener, made with streamlined shapes, in the form of an irregular trapezoid with an inclined side at the inlet of the jet; 9 - an inclined side at the inlet of the jet of the guide plate of the softener installed along the radius of the pipe in the radial direction of the pulp flow; 10 - a large base of the irregular trapezoid of the guide plate of the softener welded to the pipe.

[0019] Implementation of the invention

[0020] The assembly of the device used in the clay pellet softening method in a hydrodynamic slurry pipeline is performed using prefabricated structural components. The slurry pipeline body element 1 is cut from a pipe of the appropriate diameter in the form of blanks, the length specified in the design. The swirler 2 for the driving medium is made from a pipe similar to the slurry pipeline body 1. The swirler's working guide plates 6 are welded to the inside of the cut pipe. The plates 6 are pre-cut from sheet metal using a laser cutting machine, with a streamlined counter-edge 9 on the inclined side of the trapezoid at the jet inlet. The guide plate 6 of the softener is then installed along the pipe radius in the radial direction of the pulp flow. The plate blank 6 is installed in the template from the inner surface of the pulp pipeline pipe, for fixation in the direction of the swirler, and the large 10 base of the trapezoid is welded.Working guide plates 6 are evenly spaced along the inner surface of the circumference in segments. The plates within a segment are directed at an angle to the longitudinal axis of the pipe and rotate around the axis, one in one direction in one segment 2 and the other in the opposite direction in the other segment 4, thereby creating a repeating swirling flow in the fluid with variable direction. The component parts of the slurry pipeline structure, consisting of repeating elements of the housing 1 with swirlers 2 and 4 for the driving medium, are welded into a single unit, the slurry pipeline housing.

[0021] An example of the application of a method for softening clay pellets in a hydrodynamic slurry pipeline. Softening of clay pellets is accomplished during pulp transportation in the pipeline by periodic collision of moving clay pellets within a pipe-shaped housing with swirlers periodically positioned along the pipe, creating a repeating swirling flow in the liquid. Softening is accomplished in a pipe with streamlined guide plates 6 uniformly welded to its inner surface, shaped like an irregular trapezoid with an inclined side 9 at the jet inlet. Moreover, the guide plates 6 are evenly spaced along the inner circumference of the pipe, in segments. This technological solution enables softening of clay pellets in liquid by a repeating swirling flow with variable direction.Moreover, the plates 6 in the segments direct the flow at an angle to the longitudinal axis of the pipe 1 and turn it around the axis, in one segment in one direction, and in the other segment in the other direction.

[0022] Working guide plates 6 in the pulp flow form the active portion of the swirl region 7, which has the ability to rotate the entire flow around the axis of the pulp pipeline due to hydrodynamic communication with the passive portion of the swirl region 8. The streamlined guide plates 6 reduce hydrodynamic resistance and increase the efficiency of clay pellet softening. In a rotating flow, centrifugal force directs heavy pellet-like formations toward the inner surface of the pipe. Channel 3 of the pulp pipeline, the passage of sand-clay pulp, downstream of the preceding swirler, prepares the pulp for the softening process at the next stage. Repeating swirling flows with variable directions are formed in the liquid by the action of swirlers 2 and 4 of the driving medium subsequent to it in the feed system.Swirling is achieved in a pipe 1 with working guide plates 6, which are uniformly welded to its inner surface and feature streamlined shapes 9. Under these conditions, the processes of swirling, increased turbulence, pellet preparation for impact, softening, and disintegration are periodically repeated in varying directions. Moreover, the softening of sand-clay pellets in the pulp is achieved through hydrodynamic disruption by the guide plates during transport to the sluice gate. Additionally, if a sand-clay pellet accidentally hits the streamlined shapes 9 of the guide plates 6 in the moving pulp, they are physically destroyed and disintegrated by hydrodynamic impact.

[0023] Control experimental recording of the work of the proposed method showed an increase in the softening of pellets by 27%.

[0024] Thus, the proposed technology in the method of softening clay pellets in a hydrodynamic slurry pipeline increases the efficiency of softening clay pellets due to the repeated swirling of the flow with a variable direction during the transportation process.

[0025] Sources of information:

[0026] 1. Patent RU 2259886, IPC B03B 5 / 00, Published 10.09.2005 Bulletin No. 25.

[0027] 2. Patent RU 82597, IPC B03B 5 / 02, B22C 5 / 00, B65G 53 / 30. Published: 05 / 10 / 2009 Bulletin. No. 13.

[0028] 3. Patent RU 237236, IPC B03B 5 / 00. Published 09.16.2025 Bulletin No. 26.

Claims

A method for softening clay pellets in a hydrodynamic pulp pipeline, which includes softening the clay pellets during the process of transporting pulp in a pulp pipeline made in the form of a pipe, by periodic collision of moving clay pellets with swirlers arranged periodically along the pipe of the pulp pipeline and forming a repeating swirling flow in the liquid, characterized in that, in order to form a repeating swirling flow in the liquid, the swirlers are made in the form of a pipe with arranged segments and working guide plates welded to its inner surface, made in the form of an irregular trapezoid with an inclined side at the inlet of the stream, wherein the direction of the repeating swirling flow is changed by directing it with plates in the segments at an angle to the longitudinal axis of the pipe and turning it around the axis of the pulp pipeline, in one segment in one direction, and in the other segment in the other direction.

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