Process method for self-pressure feeding vortex forced mixing hardening and tempering

Abstract

The invention relates to the technical field of mineral flotation, in particular to a self-pressure feeding vortex forced mixing and tempering process method which comprises the following steps: S1, building a self-pressure feeding vortex forced mixing and tempering device; s2, when pulp mixing begins, an ore discharging opening is closed, and ore pulp enters the clash chamber in a horizontal clash flow mode under the action of self weight and is mixed with an agent; s3, after the ore pulp reaches the set liquid level height, a stirring shaft is started, mineral particles and flotation reagents are mixed, mixed ore pulp is obtained, and an impeller assembly conveys the mixed ore pulp from bottom to top; s4, the mixed ore pulp is discharged outwards through an ore outlet, collected and subjected to follow-up treatment; and S5, after pulp mixing is completed, the stirring shaft is closed, feeding and ore feeding are stopped, an ore discharging opening is opened, and residual ore pulp in the cylinder is emptied. The mixing efficiency of particles and agents in ore pulp is greatly improved, the adsorption strength of the particles and the agents is improved, and the recovery efficiency and the overall separation capacity are effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mineral flotation, in particular to a process method of self-pressure feeding vortex forced mixing conditioning. BACKGROUND

[0002] Flotation is a high-efficiency separation technology for processing fine-grained minerals, which is widely used in the fields of energy, mineral processing and chemical industry. This technology uses bubbles as carriers to realize the effective separation of target minerals and gangue in the gas-liquid-solid three-phase system based on the difference in hydrophobicity of mineral particle surfaces. The slurry conditioning pretreatment before flotation is crucial, which promotes the uniform mixing and dispersion of mineral particles and reagents, and strengthens the adsorption of reagents on the particle surface, thereby expanding the difference in hydrophobicity between useful minerals and useless minerals. This process completes the surface modification of particles and provides an optimized interface environment for flotation, thereby improving the mineral recovery rate and separation efficiency.

[0003] In industrial production, most manufacturers use gravity flow to make the ore slurry directly enter the flotation system through the pipeline due to the physical layout requirements of the process flow. This design does not require additional pumping power, which reduces equipment energy consumption and avoids the problem of secondary crushing of minerals caused by pumping. At the same time, the high-level gravity flow scheme eliminates the need for buffer bins or pressure facilities, significantly simplifying the plant structure and reducing capital costs. In addition, the flow stability of the self-pressure feeding system is better, which provides convenience for automatic control integration, and finally naturally forms a typical application scenario of self-pressure feeding. However, for the current high-level gravity flow scheme, although no additional pumping power is required, the system energy consumption is reduced, but it also brings problems such as low mixing efficiency of particles and reagents in the ore slurry and insufficient adsorption strength of particles-reagents, and the recovery efficiency and overall separation capacity of the system are reduced, so it needs to be solved. SUMMARY

[0004] In order to avoid and overcome the technical problems existing in the prior art, the present application provides a process method of self-pressure feeding vortex forced mixing conditioning. The present application greatly improves the mixing efficiency of particles and reagents in the ore slurry, improves the adsorption strength of particles-reagents, and effectively improves the recovery efficiency and overall separation capacity.

[0005] To achieve the above object, the present application provides the following technical scheme:

[0006] A process method of self-pressure feeding vortex forced mixing conditioning, comprising the following steps:

[0007] S1. Build a self-pressure feeding vortex forced mixing conditioning device;

[0008] The self-pressurized feeding vortex forced mixing conditioning device comprises a barrel and a stirring shaft arranged axially along the barrel, wherein impeller assemblies are arranged axially along the stirring shaft, and the impeller assemblies comprise, from bottom to top, a radial semi-open impeller, a forced impeller, a radial open impeller and a forced impeller;

[0009] An upper baffle plate, a middle baffle plate and a lower baffle plate are arranged in the barrel from top to bottom, each baffle plate has the same size and is arranged in a ring shape coaxially with the stirring shaft, and the inner diameter of each baffle plate is greater than the outer diameter of each impeller assembly; the two forced impellers are arranged on the same horizontal plane as the upper baffle plate and the middle baffle plate; and the radial semi-open impeller is arranged in the vortex conditioning chamber.

[0010] Each baffle plate sequentially separates the barrel cavity into a collision chamber, a vortex conditioning chamber, a deep conditioning chamber and a discharge chamber along the flow direction of the ore slurry from bottom to top; at least two groups of collision jet pipes are arranged in the collision chamber in a radial direction, and each collision jet pipe is arranged in a ring array; the discharge chamber is provided with a discharge opening for discharging the ore slurry, and a dosing pipe is arranged to add reagents into the collision chamber.

[0011] S2, when the conditioning starts, the discharge opening is closed, the ore slurry enters the collision chamber in the form of horizontal collision flow under the action of gravity and is mixed with the reagents;

[0012] S3, when the ore slurry reaches the set liquid level, the stirring shaft is started, the mineral particles are mixed with the flotation reagents to obtain mixed ore slurry, and the impeller assemblies convey the mixed ore slurry from bottom to top;

[0013] S4, the mixed ore slurry is discharged outward through the discharge opening, and is collected and subjected to subsequent treatment;

[0014] S5, after the conditioning is completed, the stirring shaft is closed, the feeding is stopped, and the discharge opening is opened to empty the residual ore slurry in the barrel.

[0015] As a further scheme of the present application, in step S3, the ore slurry feeding flow data are monitored and collected in real time by a flow meter, and signals are transmitted to the control system;

[0016] When the feeding flow increases or decreases, the control system increases or decreases the reagent addition amount in proportion to the increase or decrease of the feeding flow, so as to maintain the ratio of the ore slurry to the reagents in the optimal reaction range;

[0017] A flow change threshold value is set, when the ore slurry flow fluctuates too much to cause excessive or insufficient addition of reagents, and the ore slurry flow change exceeds the threshold value, an alarm is given and the automatic control is paused.

[0018] As a further scheme of the present application, the grade and yield of the concentrate are monitored in real time and fed back to the control system; when the grade or yield of the concentrate decreases, the control system increases the rotating speed of the stirring shaft in proportion to the decrease rate of the grade or yield of the concentrate.

[0019] As a further scheme of the present application: in step S4, while the ore is discharged, the inside of the cylinder is flushed from top to bottom by using high-pressure water to remove the residual ore slurry attached to the inner wall of the cylinder; at the same time, the change curve of the feeding flow in the present pulp conditioning process, the adjustment record of the reagent addition amount, the change of the concentrate grade and yield, and the adjustment data of the stirring speed are recorded.

[0020] As a further scheme of the present application: the high-pressure side and the low-pressure side of the forced impeller disc are respectively provided with a forced impeller lower blade and a forced impeller upper blade, the forced impeller upper blade and the forced impeller lower blade are both rectangular blades arranged perpendicularly to the disc, the forced impeller upper blade and the forced impeller lower blade are arranged along the radial direction of the disc, and the end faces of the forced impeller upper blade and the forced impeller lower blade are flush with the edges of the disc; the forced impeller upper blade and the forced impeller lower blade are arranged in a staggered manner around the disc.

[0021] As a further scheme of the present application: a through hole is formed on the disc of the forced impeller, the through hole is arranged in an array around the disc and is used for passing the ore slurry, the number of the through holes corresponds to the number of the forced impeller lower blades and the forced impeller upper blades, and the through hole is located in the projection range of the adjacent forced impeller lower blades and the forced impeller upper blades in the vertical direction.

[0022] As a further scheme of the present application: the included angle between the adjacent forced impeller lower blades and the forced impeller upper blades is 20°-30°.

[0023] As a further scheme of the present application: the radial open impeller includes radial open impeller blades arranged in an array around the disc, the radial open impeller blades are rectangular blades arranged perpendicularly to the disc, the blades of the radial open impeller blades penetrate the disc from top to bottom, and the end portions of the radial open impeller blades extend to the outside of the disc along the radial direction.

[0024] As a further scheme of the present application: the radial semi-open impeller disc is provided with radial semi-open impeller blades in an array on the high-pressure side; the radial semi-open impeller blades are rectangular blades, and the radial semi-open impeller blades are arranged along the radial direction of the disc; one corner end of the radial semi-open impeller blade away from the disc is cut to form a bevel-shaped structure.

[0025] As a further scheme of the present application: baffles are vertically arranged on the cavity wall in the cylinder, the body of each baffle is arranged along the radial direction of the cylinder, and each baffle is arranged in an annular array around the axis of the cylinder; the two ends of the baffle extend into the ore discharging chamber and the counter-impacting chamber, respectively.

[0026] As a further scheme of the present application: the long side length of the baffle is 2 / 3 of the height of the cylinder body, and the short side length of the baffle is 1 / 10-1 / 8 of the diameter of the cylinder body.

[0027] As a further scheme of the present application: the cylinder body is provided with a mineral slurry distribution groove coaxially arranged on the cylinder body, the mineral slurry distribution groove is provided with distribution pipes corresponding to the number of the pair of jet pipes, the mineral slurry distribution groove is provided with a mineral inlet, the height of the mineral slurry distribution groove is higher than the height of the pair of jet pipes, and the mineral slurry enters the mineral slurry distribution groove from the mineral inlet and is evenly distributed to the pair of jet pipes under the action of gravity.

[0028] As a further scheme of the present application: the diameter of the pair of jet pipes is 1 / 3-1 / 2 of the diameter of the mineral inlet.

[0029] As a further scheme of the present application: the mineral slurry distribution groove is arranged outside the cylinder body or is arranged in the deep conditioning chamber and is attached to the inner wall of the cylinder body, and each distribution pipe is arranged outside the cylinder body and is vertically arranged.

[0030] As a further scheme of the present application: the height of the mineral slurry distribution groove is greater than the diameter of the mineral inlet, and the width of the mineral slurry distribution groove is 1 / 6-1 / 8 of the diameter of the cylinder body.

[0031] As a further scheme of the present application: the top of the cylinder body is in an open shape, the opening is closed by a detachable cover plate, the driving motor is fixed on the cover plate and drives the stirring shaft to rotate.

[0032] As a further scheme of the present application: the cylinder body is provided with an inspection opening corresponding to the position of the vortex conditioning chamber.

[0033] As a further scheme of the present application: the cylinder body is provided with a mineral discharge opening at the bottom of the pair of collision chambers and used for discharging slag, and the mineral discharge opening is staggered along the radial position of each pair of jet pipes.

[0034] As a further scheme of the present application: the cylinder body is provided with a mineral outlet corresponding to the height of the mineral discharge chamber, and the mineral outlet is communicated with the mineral discharge chamber.

[0035] As a further scheme of the present application: the cylinder body is provided with a mineral outlet groove corresponding to the height of the mineral discharge chamber, the mineral outlet groove is in an annular groove body coaxial with the cylinder body, and the mineral outlet groove is uniformly provided with a mineral outlet along the circumference.

[0036] As a further scheme of the present application: the dosing pipe extends through the cylinder body to the pair of collision chambers, the dosing outlet of the dosing pipe is vertically arranged along the axial direction of the cylinder body and discharges downward, and the position of the dosing outlet corresponds to the position of the jet impingement point of each pair of jet pipes.

[0037] Compared with the prior art, the present application has the following beneficial effects:

[0038] 1. The application forms three-stage conditioning space by the collision chamber, the vortex conditioning chamber, the deep conditioning chamber and the ore discharge chamber separated by the partition, and realizes the gradient mixing of the ore pulp from the collision jet flow-turbulent shear-deep vortex by the combination of the axial staggered arrangement of the radial type and the forced type impeller group, improves the mixing efficiency of the particles and the reagent in the ore pulp, improves the adsorption strength of the particles-reagent, and effectively improves the recovery efficiency and the overall separation capacity.

[0039] 2. The forced type impeller of the application forms the high-low pressure alternating flow field by the staggered design of the upper and lower blade plates combined with the through hole structure, generates strong vortex shear force, fully mixes the reagent and the ore pulp at the micro scale, combines with the radial type open impeller through type blade plate design, enhances the radial projection effect, and forms a three-dimensional circulation with the baffle. The dosing port is located in the middle of the collision flow in the collision chamber, the bubbles are torn by the strong shear of the collision flow, and then the reagent and the ore pulp are transported from bottom to top by the negative pressure generated by the radial type semi-open impeller.

[0040] 3. The ore pulp of the application flows into the collision chamber under the action of gravity, and the flotation reagent is sucked into the cylinder under the action of the negative pressure of the impeller; the ore pulp is uniformly distributed to the collision jet pipe through the built-in ore pulp distribution groove, forms a high-speed collision flow, induces micro-scale vortex by improving the turbulent dissipation rate, accelerates the dispersion mixing and surface adsorption of the reagent and the mineral particles, and realizes efficient conditioning of micro-fine particles. Two-stage strengthening mechanism is formed along the flow direction of the ore pulp from bottom to top in the cylinder: macroscopic mixing is realized by the collision flow, and microscopic adsorption is completed by the stirring vortex, the synergistic effect of the gradient enhancement of the turbulent intensity and the gradual reduction of the vortex scale significantly optimizes the mixing efficiency and adsorption strength of the particles-reagent.

[0041] 4. The collision chamber of the application utilizes high-speed jet flow to cut reagent droplets to strengthen dispersion; the vortex conditioning chamber generates high-strength micro-turbulence through the radial type open impeller, synchronously improves the contact probability and action strength of the reagent-particles; the forced type impeller and the radial type semi-open impeller are matched in the deep conditioning chamber to enhance the collision frequency of the reagent-bubbles, and the ore pulp is finally smoothly output through the discharge chamber.

[0042] 5. The ore pulp distribution groove of the application is arranged at a high position, realizes uniform distribution without power under the action of gravity combined with the distribution pipe design, and has a ring-shaped design which can be external or internal, compact structure, which can effectively reduce the external pipeline laying and the land occupation area of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1 It is a structure schematic view of the first embodiment of the application.

[0044] Figure 2 It is a structure schematic view of the first embodiment of the application.

[0045] Figure 3Structure diagram of forced impeller in the application.

[0046] Figure 4 Structure diagram of radial open impeller in the application.

[0047] Figure 5 Structure diagram of radial semi-open impeller in the application.

[0048] Figure 6 Simulation diagram of cross-sectional flow velocity distribution of ore pulp in longitudinal and transverse directions under different stirring frequencies in the application.

[0049] Figure 7 Speed coloring visualization diagram of impeller assembly under different stirring frequencies in the application.

[0050] In the figure:

[0051] 1, cylinder; 11, collision chamber;

[0052] 121, upper partition; 122, middle partition; 123, lower partition;

[0053] 124, baffle; 125, vortex conditioning chamber; 126, deep conditioning chamber;

[0054] 13, ore discharging chamber; 14, ore discharging chute; 141, ore discharging port;

[0055] 15, ore pulp distribution chute; 151, distribution pipe; 152, collision jet pipe;

[0056] 16, ore inlet; 17, maintenance opening; 18, cover plate; 19, ore discharging port;

[0057] 2, stirring shaft; 21, forced impeller;

[0058] 211, upper blade of forced impeller; 212, lower blade of forced impeller; 213, through hole;

[0059] 22, radial open impeller; 221, blade of radial open impeller;

[0060] 23, radial semi-open impeller; 231, blade of radial semi-open impeller; 24, driving motor;

[0061] 3, dosing pipe; 31, dosing port. DETAILED DESCRIPTION

[0062] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0063] Please refer to Figures 1-7 In the embodiments of the present application, a self-pressure feeding vortex forced mixing conditioning process method comprises the following steps.

[0064] S1. A self-pressure feeding vortex forced mixing conditioning device is built.

[0065] S2. When the pulp conditioning starts, the ore discharge port 19 is closed, the ore pulp enters the collision chamber 11 in the form of horizontal collision flow under the action of gravity and is mixed with the reagent.

[0066] S3. When the ore pulp reaches the set liquid level height, the stirring shaft 2 is started, the mineral particles are mixed with the flotation reagent, the mixed ore pulp is obtained, and the impeller assembly transports the mixed ore pulp from bottom to top.

[0067] The ore pulp feeding flow data are monitored and collected in real time by the flow meter, and the signal is transmitted to the control system.

[0068] When the feeding flow increases or decreases, the control system increases or decreases the reagent addition amount in proportion according to the increase or decrease ratio of the feeding flow, so as to ensure that the ratio of the ore pulp to the reagent is maintained in the best reaction range.

[0069] A flow change threshold is set, when the ore pulp flow fluctuation is too large to cause excessive or insufficient reagent addition, and the ore pulp flow change exceeds the threshold, an alarm is given and the automatic control is paused.

[0070] The grade and yield of the concentrate are monitored in real time and fed back to the control system, when the grade or yield of the concentrate decreases, the control system increases the stirring speed of the stirring shaft 2 in proportion to the decrease rate of the grade or yield of the concentrate.

[0071] S4. The mixed ore pulp is discharged outward through the ore discharge port 141, and is collected and subjected to subsequent treatment.

[0072] At the same time of discharging the ore, the cylinder 1 is washed from top to bottom by using high-pressure water to remove the ore pulp residues attached to the inner wall of the cylinder 1, and the feeding flow change curve, the reagent addition amount adjustment record, the concentrate grade and yield change, and the stirring speed adjustment data in the present conditioning process are recorded.

[0073] S5. After the conditioning is completed, the stirring shaft 2 is closed, the feeding and ore feeding are stopped, and the ore discharge port 19 is opened to empty the residual ore pulp in the cylinder 1.

[0074] The cylinder 1 is cylindrical, and the top of the cylinder 1 is open and closed by a detachable cover plate 18, which plays a role of splash-proofing and is provided with a maintenance walkway on the surface. The cover plate 18 can be fixed by hinging or buckling.

[0075] The cover plate 18 is provided with a driving motor 24 used as a power source, which drives the stirring shaft 2 to rotate in the cylinder 1, and the stirring shaft 2 is coaxially arranged in the cylinder 1 and used to drive the impeller assembly to rotate.

[0076] The cylinder 1 is provided with three layers of partitions from top to bottom, namely an upper partition 121, a middle partition 122 and a lower partition 123. The partitions are equal in size and are all annular plates, and the outer diameter of each partition is equal to the inner diameter of the cylinder 1 and is welded and fixed with the cylinder 1.

[0077] The three layers of partitions divide the cylinder cavity of the cylinder 1 from bottom to top into a collision chamber 11, a vortex conditioning chamber 125, a deep conditioning chamber 126 and a discharge chamber 13, so as to form multi-stage conditioning in cooperation with the impeller assembly.

[0078] The bottom of the cylinder 1 is provided with a discharge port 19 which can be controlled to open and close, and after conditioning is completed, the discharge port 19 is opened to discharge the slurry inside the cylinder.

[0079] The cylinder 1 is externally fixed with a dosing pipe 3 which penetrates through the cylinder wall along the radial direction of the cylinder 1 and enters the collision chamber 11. One end of the dosing pipe 3 located outside the cylinder 1 is communicated with a reagent tank, and the other end of the dosing pipe 3 located inside the cylinder 1 is bent by 90 degrees to form a dosing outlet 31 arranged along the axial direction of the cylinder 1. The dosing outlet 31 is located at the same height as the collision jet pipe 152, and the position is located at the collision center of the collision jet pipe 152.

[0080] The cylinder 1 is provided with an inspection port 17 corresponding to the position of the collision chamber 11, which is used to observe the wear condition of the dosing pipe 3 and the impeller assembly. The diameter of the inspection port 17 is smaller than the height of the vortex conditioning chamber 125.

[0081] The cylinder 1 is also provided with baffles 124 which are arranged in an annular array around the axial direction of the cylinder 1, and the plate bodies of the baffles 124 are arranged along the radial direction of the cylinder 1, and the number of the baffles 124 is preferably four. The long edges of the baffles 124 are arranged along the axial direction of the cylinder 1, and the length of the long edges is about 2 / 3 of the height of the cylinder 1. The short edges of the baffles 124 are arranged along the radial direction of the cylinder 1, and the length of the short edges is set to be 1 / 10-1 / 8 of the diameter of the cylinder 1. The long edges of the baffles 124 are welded and fixed with the inner wall of the cylinder 1, the top of the baffles 124 extends above the uppermost forced impeller 21, the bottom of the baffles 124 extends to be flush with the bottom of the collision jet pipe 152, and the bottom of the baffles 124 is preferably designed as a closed end.

[0082] The baffle plate 124 can be of an integrated design, with the plate body penetrating through each partition. The baffle plate 124 can also be of a segmented design, with each segment being welded and fixed to each partition and the cylinder wall of the cylinder body 1.

[0083] The ore inlet 16 of the cylinder body 1 is arranged above the counter-impingement chamber 11, so that the ore slurry flows into the counter-impingement chamber 11 under the action of gravity. To achieve automatic distribution of the ore slurry, the cylinder body 1 is provided with an ore slurry distribution groove 15, which is a closed groove body arranged coaxially with the cylinder body 1, and the ore slurry of the ore inlet 16 is discharged into the ore slurry distribution groove 15. The width of the ore slurry distribution groove 15 is preferably 1 / 7 of the diameter of the cylinder body 1.

[0084] In the first embodiment, the ore slurry distribution groove 15 is arranged outside the cylinder body 1 and is flush with the height of the depth conditioning chamber 126. The ore slurry distribution groove 15 is provided with distribution pipes 151 arranged vertically at the bottom, and each distribution pipe 151 delivers ore slurry into a counter-impingement jet pipe 152. The cylinder body 1 is provided with an ore outlet groove 14 arranged in close contact with the top of the ore slurry distribution groove 15, and the ore outlet groove 14 is also a closed groove body, with the height of the ore outlet groove 14 being lower than the height of the ore discharge chamber 13. The outer wall of the ore outlet groove 14 is uniformly provided with a plurality of ore outlets 141, and the diameter of each ore outlet 141 is greater than the diameter of the ore inlet 16.

[0085] In the second embodiment, the ore slurry distribution groove 15 is arranged inside the cylinder body 1 and is arranged in the depth conditioning chamber 126, with the outer diameter corresponding to the inner diameter of the cylinder body 1, and the baffle plate 124 penetrates through the ore slurry distribution groove 15. The cylinder body 1 is vertically provided with distribution pipes 151, each of which is connected to the groove cavity of the ore slurry distribution groove 15 through an elbow and delivers ore slurry into a counter-impingement jet pipe 152. The cylinder body 1 is welded and fixed with an ore outlet 141, which is in communication with the bottom of the ore discharge chamber 13.

[0086] Each distribution pipe 151 is connected to the counter-impingement jet pipe 152 through an elbow, and the number and position of the counter-impingement jet pipes 152 correspond to the number and position of the distribution pipes 151. The counter-impingement jet pipes 152 are arranged radially in the counter-impingement chamber 11 along the cylinder body 1, and each counter-impingement jet pipe 152 is arranged in a ring array, with the number being preferably six or eight, so that the ore slurry enters the counter-impingement chamber 11 in the form of counter-impingement. The diameter of the counter-impingement jet pipe 152 is 1 / 3-1 / 2 of the diameter of the ore inlet 16.

[0087] The impeller assembly on the stirring shaft 2 includes, from bottom to top, a radial semi-open impeller 23, a forced impeller 21, a radial open impeller 22, and a forced impeller 21.

[0088] The radial semi-open impeller 23 is located above the collision flow of the collision chamber 11, and is located in the vortex conditioning chamber 125. The bottom array of the radial semi-open impeller 23 is provided with radial semi-open impeller blades 231. The radial semi-open impeller blades 231 are rectangular blades arranged radially along the disc. The radial semi-open impeller blades 231 are cut away from one corner end of the disc and adjacent to the axis of the stirring shaft 2 to form a bevel. The included angle between the bevel and the blade bottom surface is 30°-45°, and the length-height ratio of the blade is 0.8-1.2. The spacing between the two oppositely arranged blade bottom surfaces is 2 / 3-4 / 5 of the diameter of the disc.

[0089] The two groups of forced impellers 21 are located at the same height as the upper partition plate 121 and the lower partition plate 123, and the radial open impeller 22 is arranged at equal intervals with the two groups of forced impellers 21. There is a spacing between each partition plate and each impeller assembly for the passage of ore pulp.

[0090] The high-pressure side and the low-pressure side of the disc of the forced impeller 21 are respectively provided with forced impeller lower blades 212 and forced impeller upper blades 211. The forced impeller upper blades 211 and the forced impeller lower blades 212 are rectangular blades with the plate surface perpendicular to the disc, and are arranged radially along the disc of the forced impeller 21. The end faces of the forced impeller upper blades 211 and the forced impeller lower blades 212 are flush with the edges of the disc of the forced impeller 21. The forced impeller upper blades 211 and the forced impeller lower blades 212 are arranged in a staggered manner around the circumference of the disc of the forced impeller 21. The disc of the forced impeller 21 is provided with through holes 213 arranged in an array around the circumference of the disc and for the passage of ore pulp. The number of through holes 213, forced impeller lower blades 212 and forced impeller upper blades 211 corresponds, and the through holes 213 are located within the projection range of adjacent forced impeller lower blades 212 and forced impeller upper blades 211 in the vertical direction. The included angle between adjacent forced impeller lower blades 212 and forced impeller upper blades 211 of the forced impeller 21 is 20°-30°, thereby increasing the disorder of the ore pulp. In this embodiment, the forced impeller lower blades 212 and the forced impeller upper blades 211 are each provided with eight groups. The diameter of the through hole 213 is 1 / 3-1 / 9 of the diameter of the disc. The length-height ratio of the blade of the forced impeller 21 is 8:3.

[0091] The radial open impeller 22 comprises radial open impeller blades 221 arranged in a circumferential array along the disc, the radial open impeller blades 221 being rectangular blades arranged with the blade surface perpendicular to the disc, the blades of the radial open impeller blades 221 extending through the disc from top to bottom, and the end of the radial open impeller blades 221 extending to the outside of the disc of the radial open impeller 22 in a radial direction. The disc diameter of the radial open impeller 22 is 1 / 5-3 / 10 of the diameter of the cylinder 1. The length-height ratio of the radial open impeller blades 221 is 4:3.

[0092] The disc diameter of each impeller assembly is preferably one third of the diameter of the cylinder 1.

[0093] In the coal preparation test on the existing conditioning device and the present application, the test data are shown in Table 1.

[0094] Table 1

[0095]

[0096] It can be seen that, compared with the conventional conditioning device, the present application saves 37.32% of the collector and 30.96% of the foaming agent while keeping the product quality basically unchanged, greatly reducing the production cost.

[0097] Combining Figure 6 It can be seen that, compared with the conventional conditioning device, the present application saves 37.32% of the collector and 30.96% of the foaming agent while keeping the product quality basically unchanged, greatly reducing the production cost. The flow velocity distribution of the ore pulp in the longitudinal and transverse sections of the present application at the frequencies of 30HZ, 33HZ, 36HZ, 39HZ and 42HZ is shown in the drawings. The ore pulp enters the ore inlet 16 at a high speed, then flows into the expanded ore pulp distribution groove 15 and is slowed down and stabilized in the ore pulp distribution groove 15, and the ore pulp after being slowed down and stabilized enters the six groups of counter-impinging jet pipes 152 under the action of gravity, and the flow velocity slightly increases in the process. After reaching the impinging chamber 11, the ore pulp flows collide with each other, remove the fine mud on the surface of the ore pulp through countercurrent motion, and promote the dispersion of the reagent. The fluid in the impinging chamber 11 is obviously affected by the radial semi-open impeller 23, the flow velocity at the center of the impinging chamber 11 is relatively low at 30HZ, the high-speed area is greatly expanded at 42HZ, under the guidance of the lower partition plate 123, the ore pulp is sucked upward and accelerated, and the maximum flow velocity appears at the bottom and around the radial semi-open impeller 23. The radial semi-open impeller 23 pushes the ore pulp upward along the inclined trajectory, and enters the forced impeller 21 under the guidance of the lower partition plate 123. Due to the large reduction of the flow area of the forced impeller 21, the flow velocity of the ore pulp increases sharply, and the interaction between the reagent particles is significantly enhanced. Then the ore pulp flows to the radial open impeller 22, which has a wide high-speed distribution area. Then the ore pulp passes through the upper forced impeller 21 and enters the ore discharge chamber 13, and is finally discharged.

[0098] Combining Figure 7As shown, the visualization coloring of the size of the fluid flow rate of the impeller assembly can be seen that during the impeller stirring process, a series of trailing vortices can be generated at the low pressure end of each impeller assembly, and continuously develop along the direction of the ore slurry conveying. The vortex distribution formed by the low pressure end of the radial type semi-open impeller 23 and the radial type open impeller 22 is relatively wide, and can cover the blade and continuously develop along the direction of the ore slurry conveying; and the forced type impeller 21 causes a smaller range of trailing vortices due to the direct passage of part of the ore slurry through the through hole 213. The trailing vortex distribution of the radial type semi-open impeller 23 is relatively regular, and presents an inclined downward development trend along the blade rotation history path. Through the cooperation of the trailing vortices caused by each impeller, the particles and reagents are caused to move with the vortices, the particles and reagents are forced to be adsorbed through the vortex motion, and the effect of the pulp conditioning modification is effectively enhanced.

[0099] The basic principles of the application are described above in combination with specific embodiments, but it should be pointed out that the advantages, advantages, effects and the like mentioned in the application are only examples and are not limited, and these advantages, advantages, effects and the like cannot be considered as the basic principles of each embodiment of the application. In addition, the above-mentioned specific details are only for the purpose of example and for the purpose of understanding, and are not limited to the above-mentioned specific details, and the above-mentioned details do not limit the application to the above-mentioned specific details.

[0100] The block diagrams of the devices, apparatuses, equipment, systems involved in the application are only illustrative examples and are not intended to require or imply the connection, arrangement, configuration shown in the block diagram. As those skilled in the art will recognize, these devices, apparatuses, equipment, systems can be connected, arranged, configured in any manner. Words such as "include", "contain", "have" and the like are open-ended words, which mean "include but not limited to", and can be used interchangeably. The words "or" and "and" used herein mean the word "and / or", and can be used interchangeably unless the context clearly indicates otherwise. The word "such as" used herein means the phrase "such as but not limited to", and can be used interchangeably.

Claims

1. A process for self-pressing, feeding, vortexing, and forced mixing tempering, characterized by, The method comprises the following steps: S1. Constructing a self-feeding vortex forced mixing conditioning device; The self-feeding vortex forced mixing conditioning device comprises a barrel (1) and a stirring shaft (2) arranged axially along the barrel (1), wherein impeller assemblies are arranged axially along the stirring shaft (2), and the impeller assemblies comprise, from bottom to top, a radial semi-open impeller (23), a forced impeller (21), a radial open impeller (22) and a forced impeller (21); The barrel (1) is provided with an upper baffle (121), a middle baffle (122) and a lower baffle (123) from top to bottom, each baffle has the same size and is arranged in an annular structure coaxial with the stirring shaft (2), and the inner diameter of each baffle is greater than the outer diameter of each impeller assembly; the two forced impellers (21) are arranged on the same horizontal plane as the upper baffle (121) and the middle baffle (122); and the radial semi-open impeller (23) is arranged in a vortex conditioning chamber (125); Each baffle sequentially separates the barrel cavity of the barrel (1) into a collision chamber (11), a vortex conditioning chamber (125), a deep conditioning chamber (126) and a discharge chamber (13) along the flow direction of the ore slurry from bottom to top; at least two groups of collision jet pipes (152) are arranged radially in the collision chamber (11), and each collision jet pipe (152) is arranged in an annular array; the discharge chamber (13) is provided with a discharge opening (141) for discharging the ore slurry, and a dosing pipe (3) is arranged to add reagents into the collision chamber (11) S2, when the pulp conditioning starts, the discharge opening (19) is closed, the ore slurry enters the collision chamber (11) in the form of horizontal collision flow under the action of gravity and is mixed with the reagents; S3, when the ore slurry reaches the set liquid level, the stirring shaft (2) is started, the mineral particles are mixed with the flotation reagents to obtain mixed ore slurry, and the impeller assemblies transport the mixed ore slurry from bottom to top; S4, the mixed ore slurry is discharged outward through the discharge opening (141), and is collected and subjected to subsequent treatment; S5, after the pulp conditioning is completed, the stirring shaft (2) is closed, the feeding of the ore slurry is stopped, and the discharge opening (19) is opened to empty the residual ore slurry in the barrel (1).

2. A process for self-pressurized feeding, vortex forced mixing and tempering as claimed in claim 1 wherein, In step S3, the ore slurry feeding flow data are monitored and collected in real time by a flow meter, and a signal is transmitted to a control system; When the feeding flow increases or decreases, the control system increases or decreases the reagent addition amount in proportion to the increase or decrease of the feeding flow, so that the ratio of the ore slurry to the reagents is maintained in the best reaction range; A flow change threshold value is set, and when the ore slurry flow fluctuation is too large to cause excessive or insufficient addition of reagents, resulting in a change in the ore slurry flow exceeding the threshold value, an alarm is given and the automatic control is paused.

3. A process for self-pressurized feeding, vortex forced mixing and tempering as claimed in claim 1 wherein, The grade and yield of the concentrate are monitored in real time and fed back to the control system; when the grade or yield of the concentrate decreases, the control system increases the rotating speed of the stirring shaft (2) in proportion to the decrease rate of the grade or yield of the concentrate.

4. A process as claimed in claim 1, wherein the self-pressurized feed vortex forced mixing tempering process is characterized by, In step S4, while the ore slurry is discharged, the barrel (1) is flushed from top to bottom by using high-pressure water to remove the residual ore slurry attached to the inner wall of the barrel (1); at the same time, the ore slurry feeding flow variation curve, the reagent addition amount adjustment record, the concentrate grade and yield variation, and the stirring speed adjustment data in the present pulp conditioning process are recorded.

5. A process as claimed in any one of claims 1 to 4, wherein the process is a self-pressurized feeding, vortex forced mixing and tempering process, characterized in that, The high-pressure side and the low-pressure side of the forced impeller (21) disc are respectively provided with a forced impeller lower blade (212) and a forced impeller upper blade (211), the forced impeller upper blade (211) and the forced impeller lower blade (212) are both rectangular blades with the blade surface arranged vertically to the disc, the forced impeller upper blade (211) and the forced impeller lower blade (212) are arranged along the disc radial direction of the forced impeller (21), and the end surface of the forced impeller upper blade (211) and the forced impeller lower blade (212) is flush with the edge of the disc of the forced impeller (21); the forced impeller upper blade (211) and the forced impeller lower blade (212) are arranged in a staggered manner around the disc circumference of the forced impeller (21).

6. A process as claimed in claim 5, wherein the self-pressurized feed vortex forced mixing tempering process is characterized by, The disc of the forced impeller (21) is provided with through holes (213) for the pulp to pass through, which are arranged in an array around the disc circumference, and the number of the through holes (213), the forced impeller lower blade (212) and the forced impeller upper blade (211) correspond, and the through holes (213) are located in the projection range of the adjacent forced impeller lower blade (212) and the forced impeller upper blade (211) in the vertical direction.

7. A process as claimed in claim 6, wherein the self-pressurized feed vortex forced mixing tempering process is characterized by, The included angle between the adjacent forced impeller lower blade (212) and the forced impeller upper blade (211) of the forced impeller (21) is 20°-30°.

8. A process as claimed in any one of claims 1 to 4, wherein the process is a self-pressurized feeding, vortex forced mixing and tempering process, characterized in that, The radial open impeller (22) includes radial open impeller blades (221) arranged in an array around the disc circumference, the radial open impeller blades (221) are rectangular blades with the blade surface arranged vertically to the disc, the blades of the radial open impeller blades (221) penetrate the disc from top to bottom, and the end portion of the radial open impeller blades (221) extends to the outside of the disc of the radial open impeller (22) in the radial direction.

9. A process as claimed in any one of claims 1 to 4, wherein the process is a self-pressurized feeding, vortex forced mixing and tempering process, characterized in that, The high-pressure side of the disc of the radial semi-open impeller (23) is provided with radial semi-open impeller blades (231) arranged in an array; the radial semi-open impeller blades (231) are rectangular blades, and the radial semi-open impeller blades (231) are arranged in the radial direction of the disc; one corner end of the radial semi-open impeller blades (231) away from the disc and adjacent to the axis of the stirring shaft (2) is cut to form a bevel-shaped structure.

10. A process as claimed in any one of claims 1 to 4, wherein the process is a self-pressurized feeding, vortex forced mixing and tempering process, characterized in that, The cavity wall in the barrel (1) is vertically provided with baffles (124), the plate body of each baffle (124) is arranged in the radial direction of the barrel (1), and each baffle (124) is arranged in an annular array around the axis of the barrel (1); the two ends of the baffle (124) extend into the ore discharging chamber (13) and the counter-impact chamber (11) respectively.

11. A process for self-pressing and vortex forced mixing tempering according to claim 10, characterized in that, The length of the long side of the baffle (124) is 2 / 3 of the height of the barrel (1), and the length of the short side of the baffle (124) is 1 / 10-1 / 8 of the diameter of the barrel (1).

12. A process as claimed in any one of claims 1 to 4, wherein the process is a self-pressurized feeding, vortex forced mixing and tempering process, characterized in that, The barrel (1) is provided with a slurry distribution groove (15) coaxially arranged with the barrel (1), the slurry distribution groove (15) is provided with distribution pipes (151) corresponding to the number of the pair of jet pipes (152), the slurry distribution groove (15) is provided with a mine inlet (16), the height of the slurry distribution groove (15) is higher than the height of the pair of jet pipes (152), and the slurry enters the slurry distribution groove (15) from the mine inlet (16) and is evenly distributed into each pair of jet pipes (152) under the action of gravity.

13. A process as claimed in claim 12, wherein the self-pressurized feed vortex forced mixing tempering process is characterized by, The diameter of the pair of jet pipes (152) is 1 / 3-1 / 2 of the diameter of the mine inlet (16).

14. A process as claimed in claim 12, wherein the process is a self-pressurized mass flow vortex forced mixing tempering process, characterized by, The slurry distribution groove (15) is arranged outside the barrel (1) or is embedded in the depth conditioning chamber (126) and is arranged in close contact with the inner wall of the barrel (1), and each distribution pipe (151) is arranged outside the barrel (1) and is vertically arranged.

15. A process as claimed in claim 12, wherein the process is a self- feeding, vortex- enforced, mixing and tempering process. The height of the slurry distribution groove (15) is greater than the diameter of the mine inlet (16), and the width of the slurry distribution groove (15) is 1 / 6-1 / 8 of the diameter of the barrel (1).

16. A process as claimed in any one of claims 1 to 4 wherein the process is a self-pressurized feed vortex forced mixing and conditioning process, characterized in that, The top of the barrel (1) is open, the opening is closed by a detachable cover plate (18), the driving motor (24) is fixed on the cover plate (18) and drives the stirring shaft (2) to rotate.

17. A process as claimed in any one of claims 1 to 4 wherein the process is a self-pressurized feed vortex forced mixing and conditioning process, characterized in that, The barrel (1) is provided with an inspection opening (17) corresponding to the position of the vortex conditioning chamber (125).

18. A process as claimed in any one of claims 1 to 4 wherein the process is a self-pressurized feed vortex forced mixing and conditioning process, characterized in that, The barrel (1) is provided with a mine discharge opening (19) at the bottom of the pair of collision chambers (11) and used for discharging slag, and the mine discharge opening (19) is staggered with each pair of jet pipes (152) along the radial position of the barrel (1).

19. A process as claimed in any one of claims 1 to 4 wherein the process is a self-pressurized, forced vortex, mixed, and quenched process. The barrel (1) is provided with a mine outlet (141) corresponding to the height of the mine discharge chamber (13) along the radial direction, and the mine outlet (141) communicates with the mine discharge chamber (13).

20. A process as claimed in any one of claims 1 to 4 wherein the process is a self-pressurized feed vortex forced mixing and conditioning process, characterized in that, The barrel (1) is provided with a mine outlet groove (14) corresponding to the height of the mine discharge chamber (13), the mine outlet groove (14) is a ring-shaped groove body coaxial with the barrel (1), and the mine outlet groove (14) is uniformly provided with mine outlets (141) along the circumference.

21. A process as claimed in any one of claims 1 to 4 wherein the process is a self-pressurized feed vortex forced mixing and conditioning process, characterized in that, The dosing pipe (3) extends through the barrel (1) to the pair of collision chambers (11), the dosing outlet (31) of the dosing pipe (3) is vertically arranged along the axial direction of the barrel (1) and discharges from top to bottom, and the position of the dosing outlet (31) corresponds to the jet impact point position of each pair of jet pipes (152).

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