CN112691793A - Intelligent flotation machine and use method - Google Patents
Intelligent flotation machine and use method Download PDFInfo
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- CN112691793A CN112691793A CN202110096603.6A CN202110096603A CN112691793A CN 112691793 A CN112691793 A CN 112691793A CN 202110096603 A CN202110096603 A CN 202110096603A CN 112691793 A CN112691793 A CN 112691793A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/14—Flotation machines
- B03D1/16—Flotation machines with impellers; Subaeration machines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/14—Flotation machines
- B03D1/1443—Feed or discharge mechanisms for flotation tanks
- B03D1/145—Feed mechanisms for reagents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/14—Flotation machines
- B03D1/1443—Feed or discharge mechanisms for flotation tanks
- B03D1/1462—Discharge mechanisms for the froth
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Abstract
The invention provides an intelligent flotation machine and a using method thereof, wherein the flotation machine comprises a flotation machine body, an underflow box is arranged at one side of the flotation machine body and is communicated with the flotation machine body, and the input end of the underflow box is sequentially communicated with a large sleeve and a feeding disperser; the collecting agent atomization unit is used for atomizing the collecting agent and inputting the collecting agent into the large sleeve; the foaming agent atomizing unit is used for atomizing the foaming agent and inputting the foaming agent into the large sleeve; the input end of the stirring shaft is connected with the impeller, and the input end of the stirring shaft is connected with a stirring driving unit; the stirring outer sleeve is sleeved on the stirring shaft; the output end of the stirring outer sleeve is communicated with a slurry circulating chamber, and the stirring shaft outer sleeve is communicated with an air suction pipe; the slurry circulating chamber is sleeved outside the impeller; the slurry circulating chamber is provided with a plurality of air outlet channels communicated with the interior of the flotation machine body; the air suction pipe is used for guiding air to the stirring outer sleeve. The invention solves the problems of insufficient air inlet amount and insufficient mixing of the collecting agent, the foaming agent and the slurry in the flotation machine, and improves the recovery rate of clean coal.
Description
Technical Field
The invention belongs to the technical field of mineral processing equipment, and particularly relates to an intelligent flotation machine and a using method thereof.
Background
Flotation is one of the widely used production processes in mineral separation and separation, which is a technical method for separating useful minerals from ores according to the difference of the physicochemical properties of the surfaces of mineral particles. Flotation is usually completed in a flotation machine, slurry treated by adding a medicament in the flotation machine is aerated by stirring, so that certain ore particles are selectively fixed above bubbles, and float to the surface of the slurry to be scraped out to form a foam product; the rest part is kept in the ore pulp to achieve the purpose of separating minerals. During the flotation process, minerals with small adhesive force can gradually separate from bubbles and sink to form tailings; and the useful metal minerals with large adhesive force rise along with the bubbles, and a large amount of bubbles carry the metal minerals to form a foam layer, float to the surface of the ore pulp and are scraped out to form clean coal.
In the prior art, the structure of the flotation machine is many, the most commonly used flotation machine is a mechanical stirring type flotation machine at present, and the existing flotation machine has the following defects when in use: 1) the air entering amount is insufficient during the flotation, the efficiency is low when the foam is generated, and the time is long; 2) in the process of chemical-adding flotation, the collecting agent, the foaming agent and the slurry cannot be fully mixed. This causes a problem of low recovery rate of the clean coal.
Disclosure of Invention
The invention aims to provide an intelligent flotation machine and a using method thereof, and aims to solve the problems that the air inlet amount of the flotation machine is insufficient, and a collecting agent, a foaming agent and slurry cannot be fully mixed, so that the recovery rate of clean coal is improved. In order to achieve the purpose, the invention adopts the following technical scheme:
an intelligent flotation machine comprising:
a flotation machine body;
the underflow box is arranged at one side of the flotation machine body, the output end of the underflow box is communicated with the flotation machine body, and the input end of the underflow box is sequentially communicated with a large sleeve and a feeding disperser; a dispersion spraying plate communicated with the feeding disperser and the large sleeve is fixed in the large sleeve;
the collecting agent atomization unit is used for atomizing a collecting agent and inputting the collecting agent into the large sleeve, and the collecting agent atomization unit is communicated with the large sleeve;
a blowing agent atomizing unit for atomizing and inputting a blowing agent into the large sleeve, the blowing agent atomizing unit communicating with the large sleeve;
the stirring outer sleeve and the stirring shaft both extend into the flotation machine body, the output end of the stirring shaft is connected with an impeller, and the input end of the stirring shaft is connected with a stirring driving unit; a stirrer bearing is arranged on the stirring shaft; the stirring outer sleeve is sleeved on the stirring shaft and comprises a bearing chamber for mounting a bearing of the stirring machine; the output end of the stirring outer sleeve is communicated with a slurry circulating chamber, and the stirring shaft outer sleeve is communicated with an air suction pipe;
the slurry circulating chamber is sleeved outside the impeller; a plurality of air outlet channels communicated with the interior of the flotation machine body are formed in the slurry circulation chamber;
and the air suction pipe is used for introducing air into the stirring outer sleeve, and the input end of the air suction pipe is connected with an air suction control valve.
Preferably, the collector atomization unit comprises a collector feeding port, a collector atomization nozzle and a collector air inlet which are sequentially communicated; the collecting agent atomizing nozzle is fixed on the outer wall of the large sleeve; the output end of the collecting agent atomizing nozzle is communicated with the inside of the large sleeve.
Preferably, a collecting agent electrically operated valve and a collecting agent metering instrument are arranged between the collecting agent feeding port and the collecting agent atomizing nozzle.
Preferably, a plurality of flow guide grooves are formed in the inner bottom surface of the flotation machine body, and the flow guide grooves are arranged corresponding to the air outlet channel; the diversion trenches are communicated with the corresponding air outlet channels.
Preferably, the diversion trench is enclosed by a pair of oppositely arranged diversion plates; the guide plate is arc-shaped.
Preferably, the stirring driving unit comprises a small stirring belt pulley and a large stirring belt pulley which are connected in a belt manner; the small stirring belt pulley is connected to an output shaft of a stirring driving motor, and the stirring driving motor is fixed on the flotation machine body.
Preferably, the flotation device further comprises a flotation unit for beating the foam to the outside of the flotation machine body, wherein the flotation unit comprises a star-shaped scraper and a driving device; the star-shaped scraper is sleeved on a central shaft, and one end of the central shaft is connected with an output shaft of the driving device; and a gap for beating out the foam is formed between the star-shaped scraper and a clean coal slurry chute at the upper end of the flotation machine body.
Preferably, a discharging plate is detachably arranged in the flotation machine body, an outlet is formed in the bottom of the flotation machine body, and a tailing discharge port is formed between the discharging plate and one side face of the flotation machine body provided with the outlet; the outlet and the stirring shaft are located on different sides of the discharge plate.
Preferably, a density sensor for detecting the density in the slurry and a pressure sensor for detecting the pressure of the inner cavity are arranged on the feeding disperser; and the flotation machine body is provided with a clean coal sensor and a tail coal sensor.
The use method of the flotation machine is based on the intelligent flotation machine and is characterized by comprising the following steps:
the method comprises the following steps: the slurry is conveyed into the inner cavity of the feeding disperser through a pipeline and then is diffused to the large sleeve after passing through the dispersion spraying plate; meanwhile, the collecting agent is atomized by the collecting agent atomization unit and input into the large sleeve, and the foaming agent is atomized by the foaming agent atomization unit and input into the large sleeve; the atomized collecting agent and the atomized foaming agent are mixed with the slurry in the large sleeve;
step two: the slurry, the atomized collecting agent and the atomized foaming agent sequentially enter the flotation machine body through the large sleeve and the underflow box;
step three: starting the stirring power unit, and rotating the impeller to stir the slurry in the flotation machine body; meanwhile, the outside air enters the large sleeve through the air suction control valve and the air suction pipe in sequence, enters the slurry circulating chamber through the large sleeve and is discharged through the air outlet channel;
and then, the slurry in the flotation machine body, the atomized collecting agent, the atomized foaming agent and the air discharged from the air outlet channel are mixed, and the air bubbles are bonded with the minerals in the slurry to form foam.
Compared with the prior art, the invention has the advantages that:
(1) by arranging the air suction control valve, the air suction pipe, the stirring outer sleeve, the slurry circulation chamber and the stirring shaft, when the stirring device works, the impeller rotates, and external air is continuously introduced into a negative pressure area (slurry circulation chamber) of the impeller through the air suction control valve, the air suction pipe and the stirring outer sleeve, so that the air suction quantity of the flotation machine is increased, the flotation machine can obtain enough air when running, and a large amount of foam can be generated in a certain time when stirring; meanwhile, under the action of centrifugal force of the impeller, air sucked in the stirring outer sleeve is sheared by the impeller to form bubbles and crushed, the air overflows from an air outlet channel of the slurry circulation chamber, and the collecting agent, the foaming agent, the slurry and the bubbles are fully mixed at the slurry circulation chamber under the stirring action of the impeller. Therefore, the recovery rate of clean coal is improved.
(2) The diversion trench arranged on the inner bottom surface of the flotation machine body diverts collecting agents, foaming agents and slurry entering the flotation machine body so as to uniformly mix bubbles overflowing from the slurry circulation chamber, and the recovery rate of clean coal is further improved.
(3) The slurry is uniformly distributed by the disperser and then is mixed with the atomized collecting agent and the atomized foaming agent, so that the slurry, the collecting agent and the foaming agent are uniformly mixed, and the next step of fully mixing with bubbles is smoothly carried out.
Drawings
Fig. 1 is a schematic axial view of an intelligent flotation machine according to an embodiment of the present invention;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a rear view of FIG. 1;
FIG. 4 is a left side view of FIG. 1;
FIG. 5 is a right side view of FIG. 1;
FIG. 6 is a top view of FIG. 1;
FIG. 7 is a cross-sectional view of FIG. 1;
FIG. 8 is a schematic view showing the positional relationship between the clean coal slurry chute and the star-shaped scrapers of FIG. 1;
fig. 9 is a diagram showing the positional relationship among the diversion trench, the outer stirring sleeve, the stirring shaft, the impeller and the slurry circulation chamber in the intelligent flotation machine according to the embodiment of the present invention;
fig. 10 is a schematic diagram of the position relationship among the stirring outer sleeve, the impeller and the stirring shaft in the intelligent flotation machine according to the embodiment of the invention;
FIG. 11 is a schematic view of the structure of the tail coal discharge opening in FIG. 1;
FIG. 12 is a schematic view showing the positional relationship between the blowing agent inlet, the blowing agent electric valve, the blowing agent meter, the blowing agent atomizing nozzle, and the blowing agent inlet of FIG. 1.
Wherein, 1-a feeding disperser, 2-a disperser feed port flange, 3-a disperser top cover, 4-a density sensor, 5-a pressure sensor, 6-a large sleeve, 7-an underflow box, 8-a collector feed port, 9-a collector electric valve, 10-a collector metering instrument, 11-a collector atomizing nozzle, 12-a collector air inlet, 13-a foaming agent feed port, 14-a foaming agent electric valve, 15-a foaming agent metering instrument, 16-a foaming agent atomizing nozzle, 17-a foaming agent air inlet, 18-a flotation machine body, 19-a supporting seat, 20-a star-shaped scraping plate, 21-a driving device, 22-a clean coal sensor, 23-a tail coal sensor, 24-an air suction control valve and 25-an air suction flow sensor, 26-air suction pipe, 27-star-shaped scraper tail bearing seat, 28-stirring driving motor, 29-small stirring belt pulley, 30-stirring transmission triangular belt, 31-large stirring belt pulley, 32-stirring bearing chamber, 33-stirring outer sleeve, 34-diversion trench, 35-stirring support beam, 36-stirring shaft, 37-stirring motor supporting seat, 38-dispersion spraying plate, 39-stirrer bearing, 40-slurry circulation chamber, 41-impeller, 42-tail coal discharge port and 43-clean coal slurry chute.
Detailed Description
The present invention will now be described in more detail with reference to the accompanying schematic drawings, in which preferred embodiments of the invention are shown, it being understood that one skilled in the art may modify the invention herein described while still achieving the advantageous effects of the invention. Accordingly, the following description should be construed as broadly as possible to those skilled in the art and not as limiting the invention.
As shown in fig. 1-12, an intelligent flotation machine comprises: the flotation machine comprises a flotation machine body 18, a disperser unit, a collector atomizing unit, a foaming agent atomizing unit, a stirring unit, an air suction unit, a material scraping unit, a monitoring unit and a control unit.
The disperser unit comprises a feeding disperser 1, a disperser feeding port flange 2, a disperser top cover 3, a large sleeve 6, an underflow box 7 and a dispersion spraying plate 38.
The feeding disperser 1 and the disperser feeding port flange 2 are fixedly welded, the disperser feeding port flange 2 is connected with a flange of an external slurry conveying pipeline by adopting a bolt, and slurry enters the inner cavity of the feeding disperser 1 through the inlet of the disperser feeding port flange 2.
The top cover 3 of the disperser is connected with the upper part of the feeding disperser 1 by bolts, the planes of the top cover 3 of the disperser are respectively drilled and tapped and are distributed in parallel, and the top cover is respectively in threaded connection with the density sensor 4 and the pressure sensor 5 and is mainly used for monitoring the density of slurry filled in the feeding disperser 1 and the pressure of the inner cavity of the feeding disperser 1, and the output leads of the density sensor 4 and the pressure sensor 5 are connected with the control unit and are used for transmitting acquisition data.
The underflow box 7 is arranged at one side of the flotation machine body 18, the output end of the underflow box is communicated with the flotation machine body 18, and the input end of the underflow box is communicated with a large sleeve 6 and a feeding disperser 1 in sequence; a dispersion spray plate 38 is fixed in the large sleeve 6 and communicates the feed disperser 1 and the large sleeve 6, as shown in FIG. 7. Specifically, the exterior of the feeding disperser 1 is connected with the exterior upper flange plate of the large sleeve 6 by bolts through the lower flange plate, the lower end flange of the large sleeve 6 is fixedly connected with the upper opening flange of the underflow box 7 by bolts, and the side opening of the underflow box 7 is fixedly welded with the inlet of the machine body. Wherein, the equal footpath welding of 1 lower extreme internal diameter chamber of feeding dispersor and dispersion spray board 38, dispersion spray board 38 arc face down, the material thick liquid hole is arranged to the face equipartition, disperses the discharge through the aperture on dispersion spray board 38 after outside thick liquid gets into feeding dispersor 1 and opens even rain post and flow out downwards.
And the collector atomizing unit is used for atomizing the collector and inputting the collector into the large sleeve 6, and the collector atomizing unit is communicated with the large sleeve 6, as shown in fig. 7. Specifically, as shown in fig. 3, the collector atomization unit comprises a collector feeding port 8, a collector atomization nozzle 11 and a collector gas inlet 12 which are sequentially communicated. The collecting agent atomizing nozzle 11 is fixed on the outer wall of the large sleeve 6; the output end of the collecting agent atomizing nozzle 11 is communicated with the inside of the large sleeve 6; a collecting agent electric valve 9 and a collecting agent meter 10 are arranged between the collecting agent feeding port 8 and the collecting agent atomizing nozzle 11. In this embodiment, an external collector storage tank is connected with a collector feeding port 8 through a hose, a collector is input, the collector feeding port 8 is connected with an inlet of a collector electric valve 9 through stainless steel pipe threads, an outlet of the collector electric valve 9 is connected with an inlet of a collector meter 10 through stainless steel pipe threads, an outlet of the collector meter 10 is connected with a feeding port of a collector atomizing nozzle 11 through stainless steel pipe threads, the air inlet of the collector atomizing nozzle 11 is in threaded connection with a threaded end of a quick plug of a collector air inlet 12, a quick plug of the collector air inlet 12 is directly inserted into a pipe end to be connected with an external air source point, 0.5-0.7Mpa compressed air is provided from the outside, the compressed air and the collector are mixed in a nozzle in the collector atomizing nozzle 11, and the collector is atomized into micron-sized particles through the compressed air to be fully dissolved with slurry.
And the foaming agent atomizing unit is used for atomizing the foaming agent and inputting the foaming agent into the large sleeve 6, and the foaming agent atomizing unit is communicated with the large sleeve 6. The working principle of the foaming agent atomizing unit is the same as that of the collecting agent atomizing unit. Specifically, as shown in fig. 2 and 12, the foaming agent atomizing unit includes a foaming agent inlet 13, a foaming agent atomizing nozzle 16 and a foaming agent inlet 17 which are connected in sequence. The foaming agent atomizing nozzle is fixed on the outer wall of the large sleeve 6; the output end of the foaming agent atomizing nozzle 16 is communicated with the inside of the large sleeve 6; a foaming agent electric valve 14 and a foaming agent metering instrument 15 are arranged between a foaming agent feeding port 13 and a foaming agent atomizing nozzle 16. In this embodiment, an external foaming agent storage tank is connected with a foaming agent inlet 13 through a hose, a foaming agent is input, the foaming agent inlet 13 is in threaded connection with an inlet of a foaming agent electric valve 14 through a stainless steel pipe, an outlet of the foaming agent electric valve 14 is in threaded connection with an inlet of a foaming agent metering instrument 15 through a stainless steel pipe, an outlet of the foaming agent metering instrument 15 is in threaded connection with an inlet of a foaming agent atomizing nozzle 16 through a stainless steel pipe, the foaming agent atomizing nozzle 16 is in threaded connection with a quick plug threaded end of a foaming agent inlet 17, a quick plug straight-inserted pipe end of the foaming agent inlet 17 is connected with an external air source point, 0.5-0.7Mpa compressed air is provided from the outside, the compressed air and the foaming agent are mixed in a nozzle in the foaming agent atomizing nozzle 16, and the foaming agent is.
The stirring unit includes a stirring drive unit, a stirring outer sleeve 33, a stirring shaft 36, an impeller 41, and a slurry circulation chamber 40. As shown in fig. 7, the stirring outer sleeve 33 and the stirring shaft 36 both extend into the flotation machine body 18, the output end of the stirring shaft 36 is connected with an impeller 41, and the input end is connected with a stirring driving unit; a stirrer bearing is arranged on the stirring shaft 36; a stirring outer sleeve 33 sleeved on the stirring shaft 36, the stirring outer sleeve 33 including a pair of bearing chambers 32 for mounting the bearings of the stirrer and a sleeve body communicating with the bearing chambers 32, as shown in fig. 7 and 10; the output end of the stirring outer sleeve 33 is communicated with a slurry circulation chamber 40, and the stirring outer sleeve 33 is communicated with an air suction pipe 26; the slurry circulation chamber 40 is sleeved outside the impeller 41; the slurry circulation chamber 40 is provided with a plurality of air outlet channels which are communicated with the interior of the flotation machine body 18, as shown in fig. 9. Preferably, the stirring driving unit includes a stirring small pulley 29 and a stirring large pulley 31 with belt connection; the agitator pulley 29 is connected to the output shaft of an agitator drive motor 28, the agitator drive motor 28 being secured to the flotation machine body 18.
In this embodiment, the flanges at the two ends of the stirring support beam 35 are connected with the flange at the upper end of the flotation machine body 18 by bolts, and the flange at the upper end of the flotation machine body 18 is fixed with the flotation machine body 18 by welding.
The lower end of the stirring motor supporting seat 37 is fixed with the left outer side of the stirring supporting beam 35 in a welding mode, and a flange at the upper end of the stirring motor supporting seat 37 is connected with a flange disc at the front end of the stirring driving motor 28 through bolts.
The output shaft end of the stirring driving motor 28 and the stirring small belt pulley 29 are coaxially connected with an inner key strip for positioning, the center of the stirring small belt pulley 29 is provided with a hole, a bolt is downwards penetrated from the center of the hole, and the bolt and a threaded hole at the shaft end of the motor are screwed in to tightly fix the stirring small belt pulley 29; the small stirring belt pulley 29 is matched with the stirring transmission triangular belt 30, the stirring transmission triangular belt 30 is matched with the large stirring belt pulley 31, the shaft hole of the large stirring belt pulley 31 and the upper end shaft of the stirring shaft 36 are coaxially connected with an inner key strip for positioning, the center of the large stirring belt pulley 31 is provided with a hole, a bolt is downwards penetrated through the center of the hole, the bolt and a threaded hole of the shaft end of the motor are screwed in to compress and fix the stirring shaft 36, the stirring shaft 36 downwards penetrates through the stirring bearing chamber 32, and the upper end and the lower end of the stirring bearing chamber 32 are respectively.
The upper end bearing end of the stirrer bearing 39 is fixedly pressed, the bearing end cover is connected with the upper end part of the bearing chamber 32 through bolts, the lower end flange of the bearing chamber 32 and the upper end flange of the sleeve body of the stirring outer sleeve 33 are connected through bolts, the lower end flange of the sleeve body of the stirring outer sleeve 33 is connected with the upper end flange of the slurry circulation chamber 40 through bolts, the lower end of the slurry circulation chamber 40 and a bottom plate where the diversion trench 34 is located are 8mm away from the bottom of the flotation machine body 18, the diversion trench 34 is welded at the bottom of the flotation machine body 18, the stirring shaft 36 penetrates through the stirring bearing chamber 32, concentrically penetrates through the stirrer bearing 39 and penetrates through the center of an inner cavity of the slurry circulation chamber 40, the lower end shaft of the stirring shaft 36 and the impeller 41 are coaxially connected with an inner key strip for positioning. Namely, the diversion trench 34 is arranged on the inner bottom surface of the flotation machine body, and the diversion trench 34 is arranged corresponding to the air outlet channel; the diversion trench 34 is communicated with the corresponding air outlet channel; the diversion trench 34 is enclosed by a pair of oppositely arranged diversion plates; the baffles are curved as shown in fig. 7 and 9.
The suction unit includes a suction control valve 24, a suction flow sensor 25, and a suction pipe 26. The air suction pipe 26 is used for guiding air into the stirring outer sleeve 33, the input end of the air suction pipe is connected with the air suction control valve 24, a threaded hole on the outer side of the air suction control valve 24 is in threaded connection with the air suction flow sensor 25, a signal transmission cable of the air suction flow sensor 25 is connected with the data acquisition unit, the opening degree of the air suction control valve 24 is accurately adjusted through the control unit, and air suction quantity standardization and digitization are achieved. In this embodiment, the lower end of the air suction pipe 26 is connected and communicated with the four-fifths of the holes of the stirring outer sleeve 33 from bottom to top by welding.
A flotation unit for driving froth to the exterior of the flotation machine body 18, the flotation unit including a star-shaped scraper 20 and drive means 21; the star-shaped scraper 20 is sleeved on a central shaft, and one end of the central shaft is connected with an output shaft of the driving device 21; a gap for beating out froth is formed between the star scrapers 20 and the upper clean coal slurry chute 43 of the flotation machine body 18, as shown in fig. 8. In this embodiment, the supporting seat 19 is symmetrically fixed at the left and right outer ends of the machine body 18 by welding, the base of the driving device 21 is fixed with the supporting seat 19 by bolts, the front shaft of the driving device 21 is coaxially connected with the left end of the star-shaped scraper 20 for positioning by the inner spline, the tail bearing seat 27 of the star-shaped scraper is coaxially connected with the right shaft of the star-shaped scraper 20 for positioning by the inner spline, and the tail bearing seat 27 of the star-shaped scraper is fixed at the right outer end of the machine body 18 by bolts.
A discharging plate is fixed inside the flotation machine body 18, as shown in fig. 11, an adjustable overflow weir is arranged on the discharging plate, an outlet is arranged at the bottom of the flotation machine body 18, and a tailing discharging opening 42 is formed between the discharging plate and one side surface of the flotation machine body where the outlet is located, as shown in fig. 7; the outlet and the stirring shaft 36 are located on different sides of the discharge plate. Specifically, the discharge plate is provided with a discharge port communicated with a tail coal discharge port 42, and an adjustable overflow weir is arranged on the discharge port. Specifically, the adjustable overflow weir is a rectangular steel plate which can be adjusted by lifting up and down, such as a water station flashboard.
The monitoring unit comprises a density sensor 4, a pressure sensor 5, a clean coal sensor 22 and a tail coal sensor 23. The clean coal sensor 22 is fixed on the left side of the flotation machine body 18 close to the outlet direction of the front clean coal slurry chute 43 and used for monitoring the clean coal content in the clean coal slurry, and an output signal is connected with the data acquisition unit; the tailing sensor 23 is fixed at the upward half position in the middle of the tailing discharge port 42 on the right side of the flotation machine body 18 and used for monitoring the content of tailing in tailing slurry, and an output signal is connected with the data acquisition unit. In the embodiment, the data acquisition unit is in signal connection with the control unit.
In the operation process of the flotation machine, the given amount of the collecting agent and the given amount of the foaming agent are quantified according to the real-time data collected by the tailing sensor 23 according to the actual production requirement, and the given amount of the collecting agent and the given amount of the foaming agent are prevented from being adjusted randomly by adopting an artificial observation method, so that full-datamation and intelligent control are realized, and the flotation amount of clean coal can be accurately increased by more than 30% compared with the original process; secondly, the data collected by all the sensors can enter a database for storage, so that the data are convenient to summarize, analyze and guide production, and the human interference factor is avoided; after data quantization, analysis can be carried out according to a large amount of data in the database, the clean coal recovery rate can be accurately improved according to raw coal feeding indexes, the purpose of improving yield and increasing efficiency is achieved, considerable economic benefits are brought to production enterprises, and the technical achievement can be completely realized.
The working principle of the flotation machine is as follows:
(1) the slurry is conveyed into the inner cavity of the feeding disperser 1 through a pipeline, pressure and density are formed in the cavity, and then the slurry forms a dense rain column-shaped material line after passing through the dispersion spraying plate and is diffused to the large sleeve 6.
Meanwhile, the collecting agent and the foaming agent are atomized and then are mixed with the slurry in the large sleeve. Specifically, the method comprises the following steps: collecting agent enters a collecting agent atomizing nozzle 11 through a collecting agent feeding port 8, the collecting agent is atomized to particles of 0.5um in an inner cavity of the nozzle, the collecting agent atomizing nozzle 11 sprays a fog shape into the large sleeve 6, and the fog shape is mixed with a rain column-shaped material line formed by the dispersion spraying plate 38 and is diffused to the large sleeve 6; meanwhile, the foaming agent enters the foaming agent atomizing nozzle 16 through the foaming agent feeding port 13, the foaming agent is atomized to 0.5um particles in the inner cavity of the nozzle, the foaming agent atomizing nozzle 16 sprays fog shapes into the large sleeve 6, and the fog shapes are mixed with a rain column-shaped material line formed by the dispersion spraying plate 38 and are diffused to the large sleeve 6.
(2) The slurry, the atomized collecting agent and the atomized foaming agent are mixed and then enter the flotation machine body 18 through the large sleeve 6 and the underflow box 7 in sequence.
(3) Starting the stirring power unit, and rotating the impeller to stir the slurry in the flotation machine body; meanwhile, the outside air enters the large sleeve 6 through the air suction control valve and the air suction pipe in sequence, enters the slurry circulation chamber 40 through the large sleeve 6 and is discharged through the air outlet channel. Specifically, the stirring driving motor 28 is powered on to drive the small stirring belt pulley 29 to drive the stirring shaft 36 and the impeller 41 to synchronously rotate through the large stirring belt pulley 31 driven by the stirring driving triangular belt 30, the impeller 41 rotates, air is introduced into a negative pressure area where the impeller is located through the air suction control valve 24 and the air suction pipe 26, and the air suction amount of the impeller is increased.
Then, the slurry in the flotation machine body 18, the atomized collecting agent, the atomized foaming agent and the bubbles discharged from the gas outlet channel are mixed, the bubbles are bonded with the minerals in the slurry to form foams, and then the foams are uniformly diffused upwards through the diversion trench 34. The air bubbles are formed by shearing and pulverizing air in the outer stirring sleeve 33 by the impeller 41 in the slurry circulation chamber 40. The bubbles contact with the coal particles to form mineralized foams which are uniformly distributed on the cross section of each diversion trench 34 and move upwards to enter the separation region, and a large amount of foams are enriched to form a spongy foam layer.
(4) The driving device 21 is electrified to drive the star-shaped scraper 20, and the star-shaped scraper 20 discharges the foam layer from the gap between the clean coal slurry chute 43 and the star-shaped scraper 20 to form clean coal foam; the tailings flow out to a tailings discharge opening 42 through an adjustable overflow weir mounted on the discharge plate, and then are discharged into the feed tank through the tailings discharge opening 42.
In the embodiment, the tail coal sensor 23 and the clean coal sensor 22 detect the content of slurry and send analog signals to the data acquisition unit, the density sensor 4, the pressure sensor 5, the foaming agent meter 15, the collecting agent meter 10 and the air suction flow sensor 25 respectively send analog signals to the data acquisition unit, and the control unit adjusts the opening degrees of the collecting agent electric valve 9, the foaming agent electric valve 14 and the air suction control valve 24 and the height of the gate plate of the tailing box according to set values through the data acquisition unit, so that the full-automatic intelligent clean coal flotation is finally realized.
The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any way. It will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN115338039A (en) * | 2021-05-14 | 2022-11-15 | 中国科学院过程工程研究所 | Device system and method for separating coal gasification slag carbon ash |
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| CN112691793B (en) | 2023-05-16 |
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