CN111545354A - Improved flotation system and flotation process for refractory minerals - Google Patents

Abstract

The invention belongs to the technical field of refractory mineral flotation, and particularly relates to an improved refractory mineral flotation system and an improved refractory mineral flotation process. The flotation system comprises a feeding mechanism, a flotation mechanism, a tailing collecting mechanism and a concentrate collecting mechanism, wherein the feeding mechanism comprises a feeding conveying pipe and a pulp mixing module for fully mixing a collecting agent and ore pulp; the system also comprises a collecting agent dosing mechanism communicated with the feeding conveying pipe, wherein the collecting agent dosing mechanism is positioned between a feeding hole of the feeding mechanism and the pulp mixing module, a collecting agent dosing regulator used for changing the dosing amount is arranged in the collecting agent dosing mechanism, and the regulating amount of the collecting agent dosing regulator is determined by the flow rate of ore pulp; the system also comprises a bubble generating device arranged between the flotation mechanism and the size mixing module. The system disclosed by the invention is simple in structure, simplifies the flotation process flow, and can synchronize the dosage of the collecting agent and the flow of ore pulp while reducing the energy consumption, thereby being beneficial to ensuring the flotation effect.

Description

Improved flotation system and flotation process for refractory minerals

The application claims a divisional application of 'a refractory mineral flotation system and flotation process' with application number 201810118595.9 applied on 6.2.2018, and the original acceptance organization is China.

Technical Field

The invention belongs to the technical field of refractory mineral flotation, and particularly relates to an improved refractory mineral flotation system, a flotation process and a flotation process.

Background

Froth flotation is a well known process for separating finely divided material from an aqueous slurry or suspension. The particles which are desired to be recovered from the slurry may be treated with chemical agents (collectors) to render them hydrophobic and a gas, usually air, is mixed or sparged into the slurry in the form of bubbles which contact the hydrophobic particles and carry them to the surface of the slurry to form a stable froth. The froth containing the floated particles is recovered as an enriched or flotation product and the various hydrophilic materials are left to sink into the slurry and then discharged or subjected to secondary flotation.

At present, the existing flotation device mostly adopts an ore pulp preprocessor for the mixing of difficult-to-float minerals and collecting agents, has complex structure and complex process, fully mixes the collecting agents and ore pulp by impeller stirring in the flotation device, has higher energy consumption, simultaneously needs to confirm the dosage again by manually measuring the material quantity, cannot realize synchronization, and easily causes the problems of more dosage and less dosage, thereby causing the waste of the collecting agents or causing the phenomenon of poor slurry mixing effect.

Disclosure of Invention

In order to avoid and overcome the problems in the prior art, the invention provides an improved flotation system and a flotation process for refractory minerals. The system disclosed by the invention is simple in structure, simplifies the flotation process flow, and can synchronize the dosage of the collecting agent and the flow of ore pulp while reducing the energy consumption, thereby being beneficial to ensuring the flotation effect.

In order to realize the purpose of the invention, the invention adopts the following technical scheme:

an improved refractory mineral flotation system comprises a feeding mechanism, a flotation mechanism communicated with the feeding mechanism, a tailing collecting mechanism communicated with the flotation mechanism, and a concentrate collecting mechanism communicated with the flotation mechanism, wherein the feeding mechanism comprises a feeding conveying pipe and a size mixing module which is fixedly arranged in the feeding conveying pipe and is used for fully mixing a collecting agent and ore pulp; the system also comprises a collecting agent dosing mechanism communicated with the feeding conveying pipe, wherein the collecting agent dosing mechanism is positioned between a feeding hole of the feeding mechanism and the pulp mixing module, a collecting agent dosing regulator for changing the dosing amount is arranged in the collecting agent dosing mechanism, and the regulating amount of the collecting agent dosing regulator is determined by the pulp flow in the feeding mechanism; the system also comprises a bubble generating device arranged between the flotation mechanism and the size mixing module, and the bubble generating device is communicated with the feeding conveying pipe.

The flotation mechanism (20) comprises a vertically arranged separation tank (21), the feeding conveying pipe (11) is connected to the bottom end of the side face of the separation tank (21), the bottom of the separation tank (21) is inclined upwards, and the feeding conveying pipe (11) is connected with the lower end of the inclined bottom of the separation tank (21); a discharge pipe (22) is fixedly arranged at the bottom of the separation groove (21) close to the feeding conveying pipe (11), and a third control valve (73) is arranged on the discharge pipe (22); the concentrate collecting mechanism (40) is arranged at the top of the sorting groove (21); the tailings collection mechanism (30) is disposed at the upper end of the inclined bottom of the separation tank (21).

The tailing collecting mechanism (30) comprises a baffle (31) fixedly arranged in the separation groove (21), a tailing collecting pipe (32), a tailing overflow pipe (33) communicated with the tailing collecting pipe (32), and a rectification module (34) fixedly arranged in the tailing overflow pipe (33); the tailing collecting pipe (32) is connected to the upper end of the bottom of the sorting groove (21) in an inclined shape, and a feeding port of the tailing collecting pipe (32) is formed between the baffle plate (31) and the upper end of the bottom of the sorting groove (21); the tailing overflow pipe (33) is arranged upwards, an overflow weir (35) is fixedly arranged at the top of the tailing overflow pipe (33), the rectifying module (34) is composed of a plurality of closely connected rectifying pipes (341), and the axial directions of the rectifying pipes (341) are all parallel to the axial direction of the tailing overflow pipe (33); the discharge port of the tailing collecting pipe (32) is fixedly connected with a tailing discharge pipe (36), and a fourth control valve (74) is arranged on the tailing discharge pipe (36).

Further preferably, the collector adds the medicine mechanism and still includes the collector medical kit and is used for the collector of intercommunication pan feeding transport pipe and collector medical kit and adds the pencil, the collector adds the medicine regulator set firmly in the collector adds the pencil, the collector add the medicine mechanism set firmly in the top of pan feeding transport pipe.

Further preferred, the collecting agent adds medicine regulator includes spring, regulating plate, telescopic water proof membrane, the one end of spring links firmly on the collecting agent adds the pencil, and the other end links firmly the regulating plate, the flexible direction of spring adds the radial setting of pencil along the collecting agent, the face direction of regulating plate adds the axial setting of pencil along the collecting agent, the regulating plate stretches into downwards to the pan feeding conveyer pipe in, under the normality one side face of keeping away from the spring of regulating plate passes through the spring power of spring and the inner wall laminating that the collecting agent adds the pencil, the spring overcoat is equipped with the water proof membrane that plays the isolation.

Further preferably, the size mixing module comprises a module body fixedly arranged in the feeding conveying pipe, the module body is of a cylinder structure completely attached to the inner wall of the feeding conveying pipe, a plurality of through holes which are uniformly distributed at intervals and used for ore pulp circulation are formed in the module body, and the central lines of the through holes are parallel to the central axis of the feeding conveying pipe.

More preferably, the cross-sectional shape of the plurality of rectifying tubes is a square having an equal area.

The flotation process of the improved refractory mineral flotation system comprises the following steps:

s1, opening a heating device to preheat a foaming agent gasification box;

s2, opening the feeding pump to enable ore pulp to enter the feeding conveying pipe, and opening the first control valve and the second control valve to start working;

s3, overflowing and collecting the flotation concentrate through the concentrate collecting mechanism, enabling the flotation tailing coarse particle low ash content bottom flow to enter a secondary flotation operation through the tailing discharge pipe, and enabling the flotation tailing high ash content fine particles to overflow through the overflow weir to enter a concentration operation;

s4, stopping the feeding pump, and then closing the first control valve, the second control valve and the heating device after finishing the work;

and S5, opening a third control valve to enable the residual tailings in the separation tank to enter secondary flotation operation.

The beneficial effects of the invention are mainly embodied in the following aspects:

(1) according to the invention, the collecting agent dosing regulator is arranged in the collecting agent dosing mechanism communicated with the feeding conveying pipe, and the regulating quantity of the collecting agent dosing regulator is determined by the pulp flow in the feeding mechanism, so that the dosing quantity of the collecting agent and the pulp flow are in a linear relation, and the dosing quantity of the collecting agent is automatically regulated along with the change of the pulp flow, so that the dosing quantity of the collecting agent and the pulp flow are synchronous, and further the phenomenon of waste of the collecting agent caused by more collecting agents or poor pulp regulating effect caused by less collecting agents can be avoided, compared with the traditional manual collecting agent dosing, the efficiency is higher, and the effect is better; in addition, through the arrangement of the size mixing module, the ore pulp and the collecting agent are automatically and fully mixed, compared with the traditional mode that the ore pulp and the collecting agent are mixed through impeller stirring, the structure is simpler, unnecessary energy consumption is avoided, the design is simple and reasonable, the size mixing effect is ensured, the process flow is simplified, and a solid foundation is laid for obtaining a good flotation effect.

(2) According to the invention, the collecting agent dosing mechanism is fixedly arranged above the feeding conveying pipe, so that when ore pulp flows in, the collecting agent in the collecting agent box can be added into the ore pulp under the self gravity, no external force is needed, and the collecting agent dosing mechanism is simple in structure and practical.

(3) The collecting agent dosing regulator comprises a spring, a regulating plate fixedly connected to one end of the spring and a telescopic waterproof membrane sleeved outside the spring, a plate surface on one side, far away from the spring, of the regulating plate is attached to the inner wall of a collecting agent dosing pipe through the elastic force of the spring in a normal state, so that the collecting agent is prevented from falling into the feeding conveying pipe, the regulating plate compresses the spring under the impact force of ore pulp during working, the collecting agent falls into the feeding conveying pipe, the ore pulp flow is larger, the impact force is larger, the more the spring is compressed, the more the collecting agent is added (the elastic coefficient of the spring is preset according to the concentration of the ore pulp), and therefore the synchronization of the collecting agent dosing amount and the ore pulp flow can be achieved. Can know by above, collecting agent adds simple structure, the easily production preparation of medicine regulator, the mass production of being convenient for, difficult by ore pulp corrosion damage, the practicality is strong and easily realizes the automatic adjustment of collecting agent charge volume.

(4) The module of sizing mixing includes the module body that is the cylinder structure with the complete laminating of pan feeding conveying pipe inner wall, be equipped with a plurality of interval evenly distributed's the through-hole that is used for the ore pulp circulation in the module body to make flow in when sizing mixing the module after ore pulp and collecting agent mix, the section that overflows of the shrink ore pulp of sizing mixing module, increase the shearing force of ore pulp, and then reach the effect of stirring by oneself, so that realize the intensive mixing of ore pulp and collecting agent, whole process need not with the help of external force, can guarantee the size mixing effect when simple in construction, and the using value is high.

(5) According to the invention, the addition of the foaming agent can promote air to form bubbles after being sucked into the ore pulp, and the foaming agent is mixed with the air after being in a gaseous state by using the heating device, so that the stability of the formed bubbles is improved, and the adsorption of concentrate particles in the ore pulp on the surfaces of the bubbles is facilitated, so that the aim of improving the flotation efficiency is achieved; the bottom of the foaming agent gasification box is inclined, so that after one flotation operation, a part of liquid foaming agent can be remained in the foaming agent gasification box, and therefore air sucked by the ore pulp at the beginning of the next flotation operation contains the foaming agent, and the flotation efficiency is further improved.

(6) The bottom of the separation groove in the flotation mechanism is arranged in a downward inclination shape or a horizontal shape, so that tailing particles in the ore pulp are dispersed at four positions under the impact force of the ore pulp, and the tailing collection is not facilitated. For the reasons, the bottom of the separation tank is designed to be upwards inclined, so that bubbles adsorbing concentrate particles can float upwards more easily under the impact force of ore pulp during the flotation operation, and meanwhile, tailing particles sinking into the ore pulp can flow into the tailing collecting mechanism in a centralized mode, and the flotation efficiency of the flotation operation is improved.

(7) The baffle plate prevents ore pulp containing tailing particles from flowing upwards, and prevents the interference of the external environment on the separation of the concentrate. In addition, conventional flotation devices typically deliver the floated tailings directly to a secondary flotation machine, which not only increases reagent consumption, but also is inefficient. The tailing collecting mechanism adopts the tailing grading collection by utilizing the hydraulic grading principle, and the ascending water flow is changed into the laminar flow state through the arrangement of the rectification module, so that coarse-grained minerals are discharged from a tailing discharge pipe and then enter a secondary flotation machine, and fine-grained minerals overflow into an overflow weir through the rectification module; and through the regulation of the fourth control valve on the tailing discharge pipe, the classification granularity can be regulated, the smaller the fourth control valve is opened, the faster the speed of the ascending water flow is, the larger the flow is, the coarser the tailing particles overflowing out are, and vice versa. According to the invention, the tailings are collected in a grading manner, so that the purposes of improving the secondary flotation efficiency and saving the reagent are achieved.

(8) The cross section of the plurality of rectifier tubes is square with equal area, because when the square tube bundle is adopted, the water velocity difference among the tube bundles is smaller, the average on-way loss is larger, the flow field distribution is more uniform and stable, and the accurate classification of tailing particles is more facilitated.

(9) The method has the characteristics of simple process flow, easiness in mastering, high flotation efficiency, low energy consumption and strong operability.

Drawings

FIG. 1 is a schematic diagram of a flotation system according to the present invention;

FIG. 2 is a schematic view of the collecting agent dosing mechanism in the present invention in operation;

FIG. 3 is a cross-sectional view of a size mixing module of the present invention;

fig. 4 is a schematic structural diagram of a rectifier module according to the present invention.

The reference numerals have the following meanings:

10-feeding mechanism 11-feeding conveying pipe 12-size mixing module 121-module body

122-through hole 13-air extractor 20-flotation mechanism 21-separation tank 22-discharge pipe

30-tailing collection mechanism 31-baffle 32-tailing collection pipe 33-tailing overflow pipe

34-rectifier module 341-rectifier tube 35-overflow weir 36-tailings discharge pipe 37-baffle

40-concentrate collection mechanism 50-collector dosing mechanism 51-collector dosing regulator

511-spring 512-regulating plate 513-waterproof membrane 52-collector medicine box

53-collecting agent dosing tube 60-bubble generating device 61-foaming agent gasification box

62-heating device 63-air inflow pipe 64-foaming agent medicine box 65-foaming agent medicine feeding pipe

66-intake pipe 71-first control valve 72-second control valve 73-third control valve

74-fourth control valve

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments, and all other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the protection scope of the present invention.

Example 1

As shown in fig. 1 and 2, an improved refractory mineral flotation system comprises a feeding mechanism 10, a flotation mechanism 20 communicated with the feeding mechanism 10, a tailing collecting mechanism 30 communicated with the flotation mechanism 20, and a concentrate collecting mechanism 40 communicated with the flotation mechanism 20, wherein the feeding mechanism 10 comprises a feeding conveying pipe 11 communicated with a feeding pump and a size mixing module 12 fixedly arranged in the feeding conveying pipe 11 and used for fully mixing a collecting agent and ore pulp; the system further comprises a collecting agent dosing mechanism 50 communicated with the feeding conveying pipe 11, wherein the collecting agent dosing mechanism 50 is located between a feeding hole of the feeding mechanism 10 and the pulp conditioning module 12, a collecting agent dosing regulator 51 used for changing the dosing amount is arranged in the collecting agent dosing mechanism 50, and the regulating amount of the collecting agent dosing regulator 51 is determined by the pulp flow in the feeding mechanism 10; the system also comprises an air bubble generating device 60 arranged between the flotation mechanism 20 and the size mixing module 12, wherein the air bubble generating device 60 is communicated with the feeding conveying pipe 11.

As shown in fig. 1 and 2, the collector chemical adding mechanism 50 further comprises a collector chemical box 52 and a collector chemical adding pipe 53 for communicating the feeding transport pipe 11 with the collector chemical box 52, the collector chemical adding regulator 51 is fixedly arranged in the collector chemical adding pipe 53 through a detachable connection mode, and the collector chemical adding mechanism 50 is also fixedly arranged above the feeding transport pipe 11 through a detachable connection mode.

As shown in fig. 1 and 2, the collector chemical adding regulator 51 comprises a spring 511, a regulating plate 512 and a telescopic waterproof membrane 513, one end of the spring 511 is fixedly connected to the collector chemical adding pipe 53, the other end of the spring 511 is fixedly connected to the regulating plate 512, the telescopic direction of the spring 511 is arranged along the radial direction of the collector chemical adding pipe 53, the plate surface direction of the regulating plate 512 is arranged along the axial direction of the collector chemical adding pipe 53, the regulating plate 512 extends downwards to the middle upper part of the feeding transport pipe 11, one side surface of the regulating plate 512, which is far away from the spring 511, is attached to the inner wall of the collector chemical adding pipe 53 through the elastic action of the spring 511, and the spring 511 is sleeved with the waterproof membrane 513 which plays a role in isolation. The adjusting plate 512 is attached to the inner wall of the collecting agent charging pipe 53 in a normal state, so that the collecting agent is prevented from falling into the feeding conveying pipe 11; when the device works, under the impact force of ore pulp, the adjusting plate 512 compresses the spring 511, the collecting agent falls into the feeding conveying pipe 11, the larger the flow rate of the ore pulp is, the larger the impact force is, the more the spring 511 is compressed, the more the collecting agent is added, and the elastic coefficient of the spring 511 is preset according to the concentration of the ore pulp (the higher the concentration of the ore pulp is, the smaller the elastic coefficient of the spring 511 is), so that the chemical dosage of the added collecting agent can meet the demand for achieving an ideal pulp mixing effect; and the spring 511 in the collector chemical adding regulator 51 can be detached and replaced, generally, the concentration of the flotation object, namely ore pulp, of one flotation device is not changed, and if the ore pulp with the changed concentration is subjected to flotation operation, the spring 511 with the elastic coefficient corresponding to the concentration can be replaced, so that the chemical adding amount of the collector and the flow rate of the ore pulp can be synchronized. The impact force of the ore pulp on the adjusting plate 512 is in direct proportion to the flow of the ore pulp, the ore feeding amount is in direct proportion to the flow of the ore pulp, and the ore pulp concentration is larger, so that the ore pulp concentration is larger, the larger the ore feeding amount is when the ore pulp flow is the same, the larger the collecting agent amount needs to be added is, the adding amount of the collecting agent which is actually needed is determined according to the ore pulp with certain concentration in actual application, the compression length of the spring 511 is determined, and the elastic coefficient of the spring 511 is further determined.

As shown in fig. 1 and 3, the slurry mixing module 12 includes a module body 121 fixedly disposed in the feeding transport pipe 11, the module body 121 is a cylinder structure completely attached to the inner wall of the feeding transport pipe 11, a plurality of through holes 122 are disposed in the module body 121, the through holes 122 are uniformly distributed at intervals and used for ore slurry circulation, the center lines of the through holes 122 are parallel to the central axis of the feeding transport pipe 11, and the cross-sectional shapes of the through holes 122 are circular with equal area. Make ore pulp and collector mix the back through such setting and flow in when sizing mixing module 12, the section that overflows of the shrink ore pulp of sizing mixing module 12 increases the shearing force of ore pulp, and then reaches the effect of stirring by oneself to realize the intensive mixing of ore pulp and collector, whole process need not with the help of external force, can guarantee when simple structure and size mixing effect, and the using value is high.

As shown in fig. 1, the bubble generating device 60 is fixedly disposed above the feeding transport pipe 11, and the bubble generating device 60 includes a foaming agent vaporizing box 61, a heating device 62, an air inflow pipe 63, a foaming agent medicine box 64, a foaming agent medicine feeding pipe 65, and an air inlet pipe 66 for communicating the feeding transport pipe 11 and the foaming agent vaporizing box 61; the bottom of the foaming agent gasification box 61 is inclined, the air inlet pipe 66 is connected to the upper end of the inclined bottom of the foaming agent gasification box 61, the foaming agent medicine box 64 is communicated with the lower end of the inclined bottom of the foaming agent gasification box 61 through a foaming agent medicine feeding pipe 65, a first control valve 71 is arranged on the foaming agent medicine feeding pipe 65, the air inlet pipe 63 is fixedly connected to the foaming agent gasification box 61, a second control valve 72 is arranged on the air inlet pipe 63, and the heating device 62 is arranged in the foaming agent gasification box 61; an air extractor 13 is further arranged in the feeding conveying pipe 11, the air extractor 13 adopts a nozzle fixedly connected with the feeding conveying pipe 11, the nozzle is positioned between the slurry mixing module 12 and an air inlet pipe 66, and the air inlet pipe 66 is arranged close to the nozzle end of the nozzle. In addition, the inclined bottom structure of the blowing agent vaporizing chamber 61 may be designed to have other shapes capable of storing a certain amount of liquid blowing agent, and is not limited to the inclined structure.

As shown in fig. 1, the flotation mechanism 20 includes a vertically arranged separation tank 21, the feeding transport pipe 11 is connected to the bottom end of the side surface of the separation tank 21, the bottom of the separation tank 21 is inclined upward, the feeding transport pipe 11 is connected to the lower end of the inclined bottom of the separation tank 21, and the upward inclined flow direction of the bottom of the separation tank 21 is along the incoming direction of the ore slurry in the feeding transport pipe 11; a discharge pipe 22 is fixedly arranged at the bottom of the sorting groove 21 close to the feeding conveying pipe 11, and a third control valve 73 is arranged on the discharge pipe 22; the concentrate collecting mechanism 40 is arranged at the top of the sorting tank 21, and the concentrate collecting mechanism 40 comprises a concentrate collecting tank fixedly connected to one side of the top of the sorting tank 21 and a defoaming device arranged above the concentrate collecting tank; the tailings collection mechanism 30 is provided at the upper end of the bottom of the sorting tank 21 in an inclined shape.

As shown in fig. 1 and 4, the tailings collection mechanism 30 includes a baffle 31 fixed in the separation tank 21, a tailings collection pipe 32, a tailings overflow pipe 33 communicated with the tailings collection pipe 32, and a rectification module 34 fixed in the tailings overflow pipe 33; the tailing collecting pipe 32 is arranged downwards and connected to the upper end of the inclined bottom of the separation tank 21, the baffle plate 31 is horizontally arranged, the height of the baffle plate 31 is slightly higher than that of the feeding port of the tailing collecting pipe 32, and the plate surface of the baffle plate 31 covers the feeding port of the tailing collecting pipe 32; the tailing overflow pipe 33 is arranged upwards, the top of the tailing overflow pipe 33 is fixedly provided with an overflow weir 35, the rectifying module 34 consists of a plurality of closely connected rectifying pipes 341, and the axial directions of the rectifying pipes 341 are all parallel to the axial direction of the tailing overflow pipe 33; the discharge end of the tailing collecting pipe 32 inclines downwards, the discharge end of the tailing collecting pipe is fixedly connected with a tailing discharge pipe 36, and a fourth control valve 74 is arranged on the tailing discharge pipe 36. The tailing collecting mechanism 30 forms tailing grading collection by utilizing a hydraulic grading principle, ascending water flow is changed into a laminar flow state through the arrangement of the rectification module 34, so that coarse-grained minerals are discharged from a tailing discharge pipe 36 and then enter a secondary flotation machine, and fine-grained minerals overflow into an overflow weir 35 through the rectification module 34; and the classification particle size can be adjusted by adjusting a fourth control valve 74 on the tailings discharge pipe 36, wherein the smaller the opening of the fourth control valve 74 is, the faster the speed of the ascending water flow is, the larger the flow rate is, the coarser the tailings particles overflow out, and vice versa. In this embodiment, as shown in fig. 1, the tailings collection pipe 32 and the tailings overflow pipe 33 are formed by arranging the partition 37 in a large pipe body, which is convenient and practical.

As shown in fig. 4, the cross-sectional shapes of the plurality of rectifier tubes 341 are squares with equal areas, so that the water velocity difference between tube bundles is small, the average loss along the process is large, the flow field distribution is more uniform and stable, and the accurate classification of tailing particles is facilitated.

The flotation system is further described in detail below with reference to the specific process of flotation:

ore pulp is pumped into a feeding conveying pipe 11 through a feeding pump, under the impact force of the ore pulp, an adjusting plate 512 compresses a spring 511, a collecting agent falls into the feeding conveying pipe 11, the larger the ore pulp flow is, the larger the impact force is, the more the adjusting plate 512 is compressed, the more the collecting agent is added, the linear relation between the adding amount of the collecting agent and the ore pulp flow is realized, and the automatic adjustment is realized; the ore pulp and the collecting agent are mixed and enter the pulp mixing module 12, the pulp mixing module 12 shrinks the flow cross section of the ore pulp, the shearing force of the ore pulp is increased, the ore pulp and the collecting agent are fully mixed, the ore pulp and the collecting agent enter the nozzle to form jet flow, and low pressure is formed at the nozzle opening of the nozzle; after the foaming agent and the air enter the foaming agent gasification box 61, the foaming agent forms a gas state at a high temperature, the gas foaming agent and the air are mixed and then sucked into the ore pulp under a low-pressure environment at a nozzle, the gas foaming agent and the air are dissolved in the ore pulp to form micro-bubbles (concentrate is adsorbed on the surface of the bubbles), after the ore pulp enters the separation tank 21, the pressure is reduced, the bubbles dissolved in the ore pulp are separated out to form stable bubbles, the stable bubbles float upwards and overflow into the concentrate collecting tank, and the defoaming device eliminates the bubbles to collect the concentrate; the tailings cannot float upwards, enter the tailing collecting mechanism 30 along the bottom of the separation tank 21 under the impact force of jet flow, are classified in the tailing collecting mechanism 30, coarse-particle minerals are discharged from a tailing discharge pipe 36, and fine-particle minerals overflow into an overflow weir 35 through a rectification module 34 along with ascending water flow.

It should be noted that the collector adding mechanism 50 and the size mixing module 12 in the present invention can also be applied separately to form a new flotation device, for example, the collector adding mechanism 50 is added in a conventional flotation device that mixes collector and pulp by impeller stirring, or the size mixing module 12 is used to replace a pulp pre-processor (stirring impeller) in a flotation device that manually adds collector, and such embodiments are obtained by modifying the present invention and without creative labor.

Example 2

The improved flotation process of the refractory mineral flotation system comprises the following steps:

s1, opening the heating device 62 to preheat the foaming agent gasification box 61;

s2, opening the feeding pump to enable ore pulp to enter the feeding conveying pipe 11, and then opening the first control valve 71 and the second control valve 72 to start working;

s3, overflowing and collecting the flotation concentrate through the concentrate collecting mechanism 40 and entering the next process through a pipeline, enabling the coarse-particle low-ash bottom flow of the flotation tailings to enter a secondary flotation operation through the tailings discharging pipe 36, and enabling the high-ash fine particles of the flotation tailings to overflow through the overflow weir 35 and enter a concentration operation;

s4, stopping the feeding pump, and then closing the first control valve 71, the second control valve 72 and the heating device 62;

s5, opening the third control valve 73 to make the residual tailings in the separation tank 21 enter the secondary flotation operation.

The flotation process can ensure that the foaming agent gasification box 61 is in a high-temperature environment before formally entering the flotation work, so that the liquid foaming agent entering subsequently can be quickly gasified; in addition, the liquid foaming agent remained in the foaming agent gasification box 61 can be promoted to be gasified and mixed with air, so that the air sucked by the ore pulp at the beginning after the flotation work is started contains the foaming agent, and the improvement of the flotation efficiency of the flotation work is facilitated; the flotation process has the characteristics of simple process flow, easiness in mastering, high flotation efficiency, low energy consumption and strong operability.

Claims (6)

1. An improved refractory mineral flotation system comprises a feeding mechanism (10), a flotation mechanism (20) communicated with the feeding mechanism (10), a tailing collecting mechanism (30) communicated with the flotation mechanism (20), and a concentrate collecting mechanism (40) communicated with the flotation mechanism (20), and is characterized in that: the feeding mechanism (10) comprises a feeding conveying pipe (11) and a pulp mixing module (12) which is fixedly arranged in the feeding conveying pipe (11) and is used for fully mixing the collecting agent and the ore pulp; the system also comprises a collecting agent dosing mechanism (50) communicated with the feeding conveying pipe (11), wherein the collecting agent dosing mechanism (50) is positioned between a feeding hole of the feeding mechanism (10) and the pulp mixing module (12), a collecting agent dosing regulator (51) used for changing the dosing amount is arranged in the collecting agent dosing mechanism (50), and the regulating amount of the collecting agent dosing regulator (51) is determined by the pulp flow in the feeding mechanism (10); the system also comprises a bubble generating device (60) arranged between the flotation mechanism (20) and the size mixing module (12), wherein the bubble generating device (60) is communicated with the feeding conveying pipe (11).

The flotation mechanism (20) comprises a vertically arranged separation tank (21), the feeding conveying pipe (11) is connected to the bottom end of the side face of the separation tank (21), the bottom of the separation tank (21) is inclined upwards, and the feeding conveying pipe (11) is connected with the lower end of the inclined bottom of the separation tank (21); a discharge pipe (22) is fixedly arranged at the bottom of the separation groove (21) close to the feeding conveying pipe (11), and a third control valve (73) is arranged on the discharge pipe (22); the concentrate collecting mechanism (40) is arranged at the top of the sorting groove (21); the tailings collection mechanism (30) is disposed at the upper end of the inclined bottom of the separation tank (21).

The tailing collecting mechanism (30) comprises a baffle (31) fixedly arranged in the separation groove (21), a tailing collecting pipe (32), a tailing overflow pipe (33) communicated with the tailing collecting pipe (32), and a rectification module (34) fixedly arranged in the tailing overflow pipe (33); the tailing collecting pipe (32) is connected to the upper end of the bottom of the sorting groove (21) in an inclined shape, and a feeding port of the tailing collecting pipe (32) is formed between the baffle plate (31) and the upper end of the bottom of the sorting groove (21); the tailing overflow pipe (33) is arranged upwards, an overflow weir (35) is fixedly arranged at the top of the tailing overflow pipe (33), the rectifying module (34) is composed of a plurality of closely connected rectifying pipes (341), and the axial directions of the rectifying pipes (341) are all parallel to the axial direction of the tailing overflow pipe (33); the discharge port of the tailing collecting pipe (32) is fixedly connected with a tailing discharge pipe (36), and a fourth control valve (74) is arranged on the tailing discharge pipe (36).

2. An improved refractory mineral flotation system as claimed in claim 1, wherein: collecting agent adds medicine mechanism (50) still includes collecting agent medical kit (52) and is used for the collecting agent that communicates pan feeding transport pipe (11) and collecting agent medical kit (52) to add pencil (53), collecting agent add medicine regulator (51) set firmly in collecting agent adds in pencil (53), collecting agent add medicine mechanism (50) set firmly in the top of pan feeding transport pipe (11).

3. An improved refractory mineral flotation system as claimed in claim 1, wherein: collecting agent adds medicine regulator (51) and includes spring (511), regulating plate (512), telescopic water proof membrane (513), the one end of spring (511) links firmly on collecting agent adds pencil (53), and the other end links firmly regulating plate (512), the flexible direction of spring (511) adds the radial setting of pencil (53) along collecting agent, the face direction of regulating plate (512) adds the axial setting of pencil (53) along collecting agent, regulating plate (512) stretch into downwards to pan feeding transport pipe (11) in, under the normality one side face of keeping away from spring (511) of regulating plate (512) passes through the elasticity effect of spring (511) and the laminating of the inner wall of collecting agent with pencil (53), spring (511) overcoat is equipped with water proof membrane (513) that play the isolation.

4. An improved refractory mineral flotation system as claimed in claim 1, wherein: size mixing module (12) is including setting firmly module body (121) in pan feeding conveying pipe (11), module body (121) adopt with pan feeding conveying pipe (11) inner wall laminating's cylinder structure completely, be equipped with a plurality of intervals evenly distributed's through-hole (122) that are used for the ore pulp circulation in module body (121), it is a plurality of the central line of through-hole (122) all with the axis of pan feeding conveying pipe (11) is parallel.

5. An improved refractory mineral flotation system as claimed in claim 1, wherein: the cross-sectional shapes of the plurality of rectifying tubes (341) are squares having an equal area.

6. A flotation process for an improved refractory mineral flotation system according to claim 1, wherein the process includes the steps of:

s1, opening the heating device (62) to preheat the foaming agent gasification box (61);

s2, opening the feeding pump to enable ore pulp to enter the feeding conveying pipe (11), and opening the first control valve (71) and the second control valve (72) to start working;

s3, overflowing and collecting the flotation concentrate through the concentrate collecting mechanism (40), enabling the flotation tailing coarse particle low ash content bottom flow to enter a secondary flotation operation through the tailing discharge pipe (36), and enabling the flotation tailing high ash content fine particles to overflow through the overflow weir (35) to enter a concentration operation;

s4, stopping the feeding pump, and then closing the first control valve (71), the second control valve (72) and the heating device (62);

and S5, opening a third control valve (73) to enable the residual tailings in the sorting tank (21) to enter secondary flotation operation.

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