CN104437834A - Centrifugal ore-dressing device and ore-dressing method thereof - Google Patents
Centrifugal ore-dressing device and ore-dressing method thereof Download PDFInfo
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- CN104437834A CN104437834A CN201410635494.0A CN201410635494A CN104437834A CN 104437834 A CN104437834 A CN 104437834A CN 201410635494 A CN201410635494 A CN 201410635494A CN 104437834 A CN104437834 A CN 104437834A
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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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/62—Washing granular, powdered or lumpy materials; Wet separating by hydraulic classifiers, e.g. of launder, tank, spiral or helical chute concentrator type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
- B04B1/04—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with inserted separating walls
- B04B1/06—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with inserted separating walls of cylindrical shape
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B7/00—Elements of centrifuges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B7/00—Elements of centrifuges
- B04B7/02—Casings; Lids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B7/00—Elements of centrifuges
- B04B7/08—Rotary bowls
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Abstract
The invention provides a centrifugal ore-dressing device and an ore-dressing method of the centrifugal ore-dressing device, and relates to micro-fine mineral dressing, in particular to the continuous centrifugal micro-fine mineral dressing device and the ore-dressing method of the continuous centrifugal micro-fine mineral dressing device. The centrifugal ore-dressing device is characterized in that the centrifugal ore-dressing device structurally comprises a device shell, a centrifugal rotating cylinder, two inner isolation plates, an ore concentrate chute plate, a tailing chute plate and an ore feed pipe, wherein the centrifugal rotating cylinder is located in the device shell, and the upper inner wall of the centrifugal rotating cylinder is provided with an ore concentrate enrichment groove, ore concentrate discharging holes located in the groove and pneumatic control valves; the two inner isolation plates are arranged between a device shell cylinder body and the centrifugal rotating cylinder at an interval. By means of the centrifugal ore-dressing device and the ore-dressing method, efficient recycling of micro-fine minerals is facilitated, the defects of an existing discontinuous type centrifugal ore-dressing technology are overcome, and improvement and production of micro-fine mineral dressing index are facilitated; the vertical rotating cylinder structure and the pneumatic control valves are adopted to control ore discharging so that water consumption and energy consumption can be reduced, low energy consumption and environment protection can be achieved, the process is continuous and simple, the dressing efficiency is high, the mechanical failure rate is low, the recycling index is high, and the dressing granularity lower limit is low.
Description
Technical field
A kind of centrifugal separation device and beneficiation method thereof, relate to a kind of fine-particle minerals ore dressing, particularly continuous type fine-particle minerals centrifugal separation device and beneficiation method thereof.
Background technology
Fine size, mineral floatability are poor, gangue mineral argillization serious, difficulty selects the features such as ion interference is large because it has for fine-particle minerals, its ore dressing is caused to reclaim difficulty, floatation is difficult to the concentrate product obtaining qualified grade, poor based on the gravity separation method separating effect of shaking table, jigging etc., this makes sorting one of difficult problem becoming technical field of beneficiation of fine-particle minerals.
Centrifugal separation technology take centrifugal ore separator as the method that device carries out being separated target minreal and gangue mineral.The advantages such as centrifugal separation technology has fast, simple, environmental protection, energy consumption is low, cost is little, mineral recovery size lower limit is low, thus be widely used in choosing dividing of fine-particle minerals, now become the prefered method that numerous fine-particle minerals such as tungsten, tin, iron, gold, silver, copper reclaims.
At present, the centrifugal ore separator that production has been developed has two kinds: one to be horizontal centrifugal ore separators, and two is vertical centrifugal ore selectors.No matter horizontal centrifugal ore separators or vertical centrifugal ore selector, in production, the overwhelming majority adopts the mode of discontinuous to produce, centrifuge is often because the discontinuous cycle such as feed-stop material-sub-material-discharging are produced, cause the fault rate of centrifuge high, beneficiating efficiency is on the low side, and production disposal ability is less, as traditional discontinuous form centrifugal ore separator, Knelson centrifugal ore separator, Water sleeve centrifugal ore sorting etc.Although also there is the continuous type centrifugal ore separator of minority to come out in recent years, but such centrifugal ore separator is the top installation high-voltage rinse water arrangement at rotary drum inner chamber, the mineral that during production, proportion is larger are discharged by the finedraw of rotary drum bottom under the effect of high-pressure washing water becomes concentrate, thus realize continuous ore discharge, this causes mineral to rotate in centrifugal ore separator namely completing sorting less than when one week, during centrifugation, compole is short, fine-particle minerals is caused to sort efficiency lower, mineral enrichment is higher than not, water consumption is very big simultaneously, as adverse current continuous centrifugal concentrating machine, jet continuous centrifugal concentrating machine, SLON continuous centrifugal concentrating machine etc., these factors limit centrifugal ore separator further application industrially.
Chinese invention patent " a kind of Efficient centrifugal ore separator ", patent No. CN103495511A discloses a kind of Efficient centrifugal ore separator, it proposes to arrange endosiphuncular tube in the cavity of ore dressing storehouse, stream chamber, ore deposit is formed between endosiphuncular tube and ore dressing storehouse, shell and ore dressing storehouse form sump, thus realize the recovery of valuable mineral.Although the recyclable valuable mineral of the method, adopt sump aqueous reflux to rinse, to guarantee to work continuously, this makes the valuable mineral centrifugation time shorter, and organic efficiency is not high; Concentrate is arranged outward does not in addition have control measure, affects concentrate grade.Therefore, the efficiency of separation of this patent to fine-particle minerals is on the low side, and the scope of application is narrower.
Chinese invention patent " continuous ore discharge centrifugal separator ", patent No. CN103203291A discloses a kind of continuous type centrifugal ore separator, it proposes centrifugal basket and adopts inner sleeve and overcoat to design, inner sleeve and overcoat are formed water cavity and are recoiled by inlet opening, and then realize material in rotating cylinder loose separately, and carry out layering under the influence of centrifugal force.The method enhances material and carry out layering by density size in centrifugal field, but do not carry out design to the cone angle of centrifugal basket to consider, for the material of different grain size and density, the cone angle of centrifugal basket has great impact in material centrifugation, this makes this device be that the efficiency of separation is not high at the material of sorting different grain size and density, and the scope of application is limited.
Summary of the invention
Object of the present invention is exactly the deficiency existed for above-mentioned prior art, provide a kind of fast, simple, continuously, the continuous type fine-particle minerals centrifugal separation device of efficient, recovery index and beneficiation method thereof.
The object of the invention is to be achieved through the following technical solutions.
A kind of centrifugal separation device, is characterized in that its structure comprises:
Device case, this housing is a vertical closed tubular shell, tubular shell lower sidewall have concentrate gape and tailing outlet port, on push up and have iron ore feeding hole between two parties;
Centrifugal basket, this centrifugal basket be one be centrally placed in device case, bottom is fixed on through the round frusto-conical barrel on the rotating shaft of device case lower shoe; The outer side edges edge, upper end of its cylindrical shell is connected with horizontal ring flat-plate; The upper inside wall of its cylindrical shell is provided with horizontal bar shaped ring-type concentrate enrichment groove, concentrate enrichment groove is uniformly distributed and arranges several arc-shaped concave pits, have concentrate mineral ejection hole on each arc-shaped concave pit summit; Each concentrate mineral ejection hole is provided with pneumatic control valve;
Internal partition, its internal partition is that two block gaps are arranged at device case cylindrical shell and vertical section of tubular dividing plate between centrifugal basket, is fixed on device case base plate bottom it; Wherein on internal layer dividing plate along being positioned at the pneumatic control valve lower end that centrifugal basket is provided with, the upper edge of outer internal partition is inwardly provided with and is positioned at centrifugal basket cylindrical shell upper end outer side edges along the annular slab under upper affixed horizontal ring flat-plate;
Concentrate chute plate, this concentrate chute plate is be fixed in the strip helical form batten on internal layer dividing plate outer wall and outer dividing plate inwall; Concentrate chute plate tail end is provided with the concentrate discharge pipe through device case base plate;
Mine tailing chute plate, this mine tailing chute plate is the strip helical form batten be fixed in outer dividing plate outer wall and inner vertical walls; The tailing outlet port that the tubular shell lower sidewall that its mine tailing chute plate lower end is positioned at device case has;
Mineral-feeding pipe, this mineral-feeding pipe vertically penetrates device case upper plate, stretches in centrifugal basket.
A kind of centrifugal separation device of the present invention, it is characterized in that its structure also comprises the frame be positioned under device case, this frame is provided with brace table plate, and it supports air compressor platen being fixed with and driving the motor of centrifugal basket connection rotating shaft, control the pneumatic clamps control valve that centrifugal basket concentrate mineral ejection hole is provided with.
A kind of centrifugal separation device of the present invention, it is characterized in that supporting on platen at device case base plate and frame being provided with bearing block, described rotating shaft supports platen through device case base plate and frame, is fixedly connected by bearing; Described rotating shaft connects with drive motors belt; The quill shaft that described rotating shaft is top closure, upper portion side wall has some passages, lower ending opening; This quill shaft lower end is connected with air compressor by swivel joint, solenoid directional control valve.
A kind of centrifugal separation device of the present invention, it is characterized in that the described pneumatic control valve be provided with on each concentrate mineral ejection hole is pneumatic clamps pipe valve, this pneumatic clamps pipe valve connects with the annular air supply pipe be fixed on centrifugal basket outer wall, and some passages that annular air supply pipe is had by connecting tube and rotating shaft upper portion side wall connect.
A kind of centrifugal separation device of the present invention, it is characterized in that its structure also comprises concentrate chute jet water spout, this jet water spout is arranged on the device case base plate below concentrate chute plate.
A kind of centrifugal separation device of the present invention, it is characterized in that its structure also comprises mine tailing chute jet water spout, this jet water spout is arranged on the outer internal partition outside mine tailing chute plate.
A kind of centrifugal separation device of the present invention, is characterized in that its structure also comprises to ore deposit jet water spout, and should be arranged at the side of mineral-feeding pipe to ore deposit jet water spout, pass perpendicularly through device case upper plate, stretch in centrifugal basket, its lower end is provided with horizontal flushing hole.
A kind of centrifugal separation device of the present invention, be is characterized in that being fixed with base flange at centrifugal basket lower bottom part bolt, is connected by base flange with rotating shaft upper end.
A kind of centrifugal separation device of the present invention, is characterized in that in centrifugal basket, bottom is provided with dampen rotor between two parties.
A kind of centrifugal separation device of the present invention, is characterized in that the angle of taper of described centrifugal basket is 16 ° ~ 22 °.
A kind of centrifugal separation device of the present invention, it is characterized in that described centrifugal basket is formed by retrofit casting by ZG35 material, its inside surface roughness is 12.4 ~ 12.6 μm.
A kind of centrifugal separation device of the present invention, it is characterized in that the bar shaped ring-type concentrate enrichment groove that described centrifugal basket cylindrical shell top inner wall is provided with is uniformly distributed arranging 24 arc-shaped concave pits, the diameter of the concentrate mineral ejection hole had on each arc-shaped concave pit summit is 3 ~ 5mm.
The beneficiation method of a kind of centrifugal separation device of the present invention, is characterized in that the rotating speed of its Process Control of Mineral Dressing centrifugal basket is 200 ~ 1000r/min, and the washing water quantity controlling concentrate chute jet water spout and mine tailing chute jet water spout is 0 ~ 3L/min; The commutation of solenoid directional control valve is 0 ~ 300Hz/min frequently.
The invention has the advantages that:
(1) for the sorting of fine-particle minerals, the present invention is by Exact calculation and analysis of experiments, show that the centrifugal basket cone angle of fine-particle minerals sorting is 16 ° ~ 22 ° scope the bests, breach conventional centrifugal rotating cylinder cone angle to control, in the drawback of 30 ° ~ 50 ° of scopes, to be conducive to the high efficiente callback of fine-particle minerals;
(2) for the deficiency of traditional discontinuous centrifugal separation technology, the present invention arranges concentrate enrichment groove at the top inner conical surface of centrifugal basket, and realize the control of concentrate grade and continuous ore discharge by a series of manipulation unit such as air blast, solenoid directional control valve, pneumatic clamps pipe valves, overcome the deficiency of existing discontinuous centrifugal separation technology, be conducive to raising and the production of fine-particle minerals mineral processing index;
(3) for the deficiency of rotating shaft in existing centrifugal separation device, the present invention is through a large amount of experiment and computations, the rotating shaft of design can meet the needs of the factors such as the size of axle, intensity, rigidity, stressed and moment of torsion, rationally can transmit rotary power again, the unimpeded of gas circuit can also be realized, be conducive to the recovery of fine-particle minerals;
(4) continuous seepage, water a high difficult problem can not be consumed for existing centrifugal separation device, device of the present invention can realize continuous seepage, concentrate grade and production disposal ability can be improved again, adopt vertical drum structure and pneumatic operated valve to control ore discharge simultaneously and can reduce water consumption energy consumption, can low-energy environment-friendly be realized again, be a kind of continuously, the centrifugal separation new equipment that simple, the efficiency of separation is high, failure rate of machinery is low, recovery index is high, sorting granularity lower limit is low and method.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of centrifugal separation device of the present invention;
Fig. 2 is centrifugal basket structural representation of the present invention;
Fig. 3 is the structural representation of centrifugal rotating cylinder concentrate enrichment groove of the present invention;
Fig. 4 is the partial enlarged view of Fig. 3.
Detailed description of the invention
A kind of centrifugal separation device, its structure comprises:
Device case 1, this housing is a vertical closed tubular shell, tubular shell lower sidewall have concentrate gape 16 and tailing outlet port 15, on push up and have iron ore feeding hole 4 between two parties;
Centrifugal basket 3, this centrifugal basket 3 be one be centrally placed in device case 1, bottom is fixed on through the round frusto-conical barrel on the rotating shaft 12 of device case 1 lower shoe; The outer side edges edge, upper end of its cylindrical shell is connected with horizontal ring flat-plate 27; The upper inside wall of its cylindrical shell is provided with horizontal bar shaped ring-type concentrate enrichment groove 25, concentrate enrichment groove 25 is uniformly distributed and arranges several arc-shaped concave pits 28, have concentrate mineral ejection hole 29 on each arc-shaped concave pit 28 summit; Each concentrate mineral ejection hole is provided with pneumatic control valve 7;
Internal partition 30, its internal partition is that two block gaps are arranged at device case cylindrical shell and vertical section of tubular dividing plate between centrifugal basket, is fixed on device case base plate 31 bottom it; Wherein on internal layer dividing plate along being positioned at the pneumatic control valve lower end that centrifugal basket is provided with, the upper edge of outer internal partition is inwardly provided with and is positioned at centrifugal basket cylindrical shell upper end outer side edges along the annular slab under upper affixed horizontal ring flat-plate 27;
Concentrate chute plate 17, this concentrate chute plate 17 is for being fixed in the strip helical form batten on internal layer dividing plate outer wall and outer dividing plate inwall; Concentrate chute plate 17 tail end is provided with the concentrate discharge pipe 16 through device case base plate;
Mine tailing chute plate 18, this mine tailing chute plate 18 is for being fixed in the strip helical form batten in outer dividing plate outer wall and inner vertical walls; The tailing outlet port 15 that the tubular shell lower sidewall that its mine tailing chute plate 18 lower end is positioned at device case has;
Mineral-feeding pipe 4, this mineral-feeding pipe 4 vertically penetrates device case upper plate 32, stretches in centrifugal basket 3.
A kind of centrifugal separation device of the present invention, its structure also comprises the frame 2 be positioned under device case, this frame 2 is provided with support platen, and it supports the air compressor 5 platen being fixed with and driving the motor 6 of centrifugal basket connection rotating shaft, control the pneumatic clamps control valve that centrifugal basket concentrate mineral ejection hole is provided with.
A kind of centrifugal separation device of the present invention, supports on platen at device case base plate 31 and frame 2 and is provided with bearing block 10, and described rotating shaft 12 supports platen through device case base plate 31 and frame 2, is held be fixedly connected by axle 11; Described rotating shaft 12 connects with drive motors 6 belt; The quill shaft that described rotating shaft 12 is top closure, upper portion side wall has some passages, lower ending opening; This quill shaft lower end is connected with air compressor 5 by swivel joint 8, solenoid directional control valve 9.
A kind of centrifugal separation device of the present invention, the described pneumatic control valve be provided with on each concentrate mineral ejection hole is pneumatic clamps pipe valve 7, this pneumatic clamps pipe valve connects with the annular air supply pipe be fixed on centrifugal basket 3 outer wall, and some passages that annular air supply pipe is had by connecting tube and rotating shaft 12 upper portion side wall connect.
A kind of centrifugal separation device of the present invention, its structure also comprises concentrate chute jet water spout 21, and this jet water spout 21 is arranged on the device case base plate 31 below concentrate chute plate 17.
A kind of centrifugal separation device of the present invention, its structure also comprises mine tailing chute jet water spout 26, and this jet water spout is arranged on the outer internal partition 30 outside mine tailing chute plate 18.
A kind of centrifugal separation device of the present invention, its structure also comprises to ore deposit jet water spout 22, and should be arranged at the left side of mineral-feeding pipe 4 to ore deposit jet water spout 22, and pass perpendicularly through device case upper plate 32, stretch in centrifugal basket 3, its lower end is laterally provided with flushing hole.
A kind of centrifugal separation device of the present invention, is fixed with base flange 24 at centrifugal basket 3 lower bottom part bolt, is connected by base flange 24 with rotating shaft 12 upper end.
A kind of centrifugal separation device of the present invention, in centrifugal basket 3, bottom is provided with dampen rotor 19 between two parties.
A kind of centrifugal separation device of the present invention, described centrifugal basket 3 is formed by retrofit casting by ZG35 material, and its inside surface roughness is 12.4 ~ 12.6 μm, and angle of taper is 16 ° ~ 22 °.
A kind of centrifugal separation device of the present invention, the bar shaped ring-type concentrate enrichment groove 25 that described centrifugal basket 3 cylindrical shell top inner wall is provided with is uniformly distributed and arranges 24 arc-shaped concave pits 28, the diameter of the concentrate mineral ejection hole 29 had on each arc-shaped concave pit 28 summit is 3 ~ 5mm.
The beneficiation method of a kind of centrifugal separation device of the present invention, the rotating speed of its Process Control of Mineral Dressing centrifugal basket is 200 ~ 1000r/min, and the washing water quantity controlling concentrate chute jet water spout 21 and mine tailing chute jet water spout 26 is 0 ~ 3L/min; The commutation of solenoid directional control valve is 0 ~ 300Hz/min frequently.
A kind of centrifugal separation device of the present invention and beneficiation method thereof, the separation and consentration process of its fine-particle minerals is a continuous print automatic control process, realized by a series of control unit, whole system is made up of parts such as air compressor, pneumatic clamps pipe valve, solenoid directional control valve, control systems, and its feature is as follows:
(1) pneumatic clamps pipe valve is a kind of for controlling or cut-off solid, suspension, the compact pneumatic operated valve that can automatically close of various fluid and gas etc., by valve body, lining and neck bush spool composition, when the differential pressure action of 2 ~ 3bar by pinch valve valve body medium pressure or operating pressure, pneumatic clamps pipe valve is closed, in design, pinch valve adopts AKO-VMC Series Pneumatic pinch valve, it is the extraordinary starting element of a kind of anti-wear performance, the opening and closing of this pinch valve adopts the mode passing into Compressed Gas to make it close, heavy mineral starts enrichment, when pinch valve is in open mode, heavy mineral is discharged by centrifugal force and pressure effect.
(2) solenoid directional control valve is a kind of for switching on or off source of the gas, and to the control valve that gas circuit switches, when electromagnetic valve coil is energized, pinch valve neck bush is closed, and now passage does not communicate, and centrifuge treating is in heavy mineral enrichment state; When power is off, valve is in exhaust condition, and the neck bush spool of pinch valve is opened, and the heavy mineral of enrichment is discharged.
(3) control system has been come by relevant program command.
(4) the present invention has carried out meticulous calculating and lot of experiments to the cone angle of centrifugal basket, result shows that the sorting of the cone angle of centrifugal basket on fine-particle minerals has important impact, although fine-particle minerals stressing conditions in stream film is complicated, its motion state depends on overall making a concerted effort, but different cone angle parameter dirty film Minerals particles is stressed all different, and the rotary motion track of stream film is also different, to get in rotating flow film any particle as research object, when rotating cylinder High Rotation Speed, in the numerous power suffered by this particle, centrifugal force F
cwith gravity F
gall the time be the power by principal element, relative to this two power, remaining stressed gravitational field buoyancy F suffered by it
b, resistance F
dvery little etc. the movement locus impact of power on particle, can ignore, therefore the main stress factor of particle be analyzed, namely the bonding force that this particle is subject to is the vector of gravity and centrifugal force, under the effect of this bonding force, the surface of revolution that Liu Mocheng center is low, periphery is high, as shown in the figure.
α is the cone angle of curved surface, the relation that can be obtained centrifugal force, gravity by figure and be made a concerted effort:
Therefore, the parabolic curve mathematic(al) representation of liquid stream can be obtained:
or
After integration:
In above formula, C is integral constant, and this constant is different according to the selection of reference datum, and this formula shows that rotating liquid level is parabola about axisymmetry, paraboloidal openings of sizes and sinking degree relevant with angular velocity omega.
In the present invention, if using rotating cylinder upper end open as with reference to datum level, the parameters such as the diameter of comprehensive rotating cylinder calculate, then particle by making a concerted effort, the relation of rotating cylinder rotating speed and cone angle is as shown in table 1.
Table 1 cone angle, rotating speed, relation table of making a concerted effort
From table 1, the cone angle of centrifugal basket is when 16 ° with 22 °, and centrifugal rotational speed is in 147.73 ~ 152.98r/min scope, and suffered making a concerted effort is 3.72 F
g~ 5.76F
g, now fine-particle minerals can form Rotational Thin stream film and not be piled up in rotating cylinder in centrifugal basket, and due to the enriching and recovering of concentrate, this result calculated and its result of the test fit like a glove.Visible, the sorting of centrifugal basket cone angle on fine-particle minerals has important impact, and traditional centrifugal separation technology all by rotating cylinder cone angle design 30 ° ~ 50 ° scopes, therefore fail to obtain good mineral processing index to the sorting of fine-particle minerals.Meanwhile, the research both at home and abroad in centrifugal basket cone angle has no relevant report, and this creationary thought is not integrally disclosed in centrifuge technical field of beneficiation with each control system combinationally used and complete set technology and is not easy to be conceived yet.
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Implementation process of the present invention and job step comprise:
(1) start drive motors 6, regulate variable-frequency governor FSC-G5 to change the frequency of motor power, the rotating speed controlling centrifugal basket 3 is 200 ~ 1000r/min, and open concentrate chute jet water spout 21 and mine tailing chute jet water spout 26, control washing water quantity is 0 ~ 3L/min;
(2) air compressor 5 is started, regulation and control solenoid directional control valve 9 is in "on" position, air is blasted by air compressor 5, through solenoid directional control valve 9, swivel joint 8, rotating shaft gas passage 13, pneumatic soft strength pipe 20 and Compressed Gas tube channel 14, finally be filled with in pneumatic clamps pipe valve 7, the spool of pneumatic clamps pipe valve 7 is closed, bottom the centrifugal basket 3 now material ore pulp being fed High Rotation Speed by mineral-feeding pipe 4, material is got rid of dispersed to the internal cone wall of centrifugal basket 3 opening under centrifugal action, and on internal cone wall, form thin stream film, and start to carry out layering by density variation, the large particle of density first sedimentation presses close to the internal cone wall of centrifugal basket, and move up along internal cone wall, finally be deposited in concentrate enrichment groove 25, the particle that density is little is then screwed out with current fast because the centrifugal force be subject to is little, sinking speed slow, form mine tailing, and discharged by the crown center position of centrifugal basket 3, through mine tailing chute plate 18, discharged by tailing outlet port 15 under the bath effect of mine tailing chute jet water spout 26,
(3) after concentrate is full of concentrate enrichment groove 25, close air compressor 5, regulation and control solenoid directional control valve 9 is in off-position, compressed air is back arranged by pneumatic clamps pipe valve 7, through Compressed Gas tube channel 14, pneumatic soft strength pipe 20, rotating shaft gas passage 13 and swivel joint 8, finally discharge by solenoid directional control valve 9, the spool of pneumatic clamps pipe valve 7 is opened, concentrate in now concentrate enrichment groove 25 is discharged by pneumatic clamps pipe valve 7, by concentrate chute plate 17, discharged by concentrate gape 16 under the bath effect of concentrate chute water pipe in a state of excitement, air compressor 5 is opened again after concentrate in concentrate enrichment groove 25 drains, regulation and control solenoid directional control valve 9 is in "on" position, blast air, pneumatic clamps pipe valve 7 is closed, concentrate in centrifugal basket 3 is enriched in again in concentrate enrichment groove 25, repeat operation, ensure that the grade of concentrate and continuous ore discharge, whole process is without the need to shutting down and stopping to ore deposit.
Embodiment 1
The raw ore tungstenic 0.19% sorted, in raw ore, tungsten mineral mainly exists with the form of scheelite and wolframite, and embedding cloth feature is complicated, and disseminated grain size is fine, the tungsten concentrate tungstenic adopting existing centrifugal separation technology to obtain only 6.47%, tungsten recovery rate only 53.38%.A kind of centrifugal separation device of the present invention and beneficiation method thereof is adopted to carry out sorting, when feed ore concentration be 25%, be 1.82L/min to ore deposit speed, centrifugal basket normally work time rotating speed be 650r/min, selected slurry fineness be-0.074mm content account for 70%, through above-mentioned steps sorting, the tungsten concentrate tungstenic 17.35% of acquisition, tungsten recovery rate are 80.18%.
Embodiment 2
The raw ore tungstenic 0.23% sorted, in ore, tungsten mineral is mainly composed and is existed in wolframite, and embedding cloth feature is comparatively complicated, and disseminated grain size is comparatively thin, the tungsten concentrate tungstenic adopting conventional centrifugal separation technology to obtain only 8.91%, tungsten recovery rate only 61.55%.A kind of centrifugal separation device of the present invention and beneficiation method thereof is adopted to carry out sorting, when feed ore concentration be 23%, be 2.15L/min to ore deposit speed, centrifugal basket normally work time rotating speed be 580r/min, selected slurry fineness be-0.074mm content account for 68%, through above-mentioned steps sorting, the tungsten concentrate tungstenic 20.28% of acquisition, tungsten recovery rate are 83.65%.
Embodiment 3
The raw ore tungstenic 0.25% sorted, in ore, tungsten mineral is based on scheelite, and wolframite is a small amount of, black, white tungsten symbiosis is obvious, and adhesion is fine and close, and embedding cloth feature is complicated, disseminated grain size is comparatively thin, the tungsten concentrate tungstenic adopting existing centrifugal separation technology to obtain only 5.38%, tungsten recovery rate only 55.68%.A kind of centrifugal separation device of the present invention and beneficiation method thereof is adopted to carry out sorting, when feed ore concentration be 20%, be 1.95L/min to ore deposit speed, centrifugal basket normally work time rotating speed be 710r/min, selected slurry fineness be-0.074mm content account for 75%, through above-mentioned steps sorting, the tungsten concentrate tungstenic 24.63% of acquisition, tungsten recovery rate are 86.21%.
Comparative example
The raw ore tungstenic 0.21% sorted, in ore, tungsten is mainly wolframite, and the embedding cloth feature of mineral is complicated, disseminated grain size is thinner, adopt existing centrifugal separation technology (bibliography: " centrifuge reclaims the experimental study of tungsten in certain tungsten mill tailings ", Chen Jiangan, Zhu Weiwei, Peng Zheng, Liu Jun, Chinese Tungsten Industry, the 27th volume the 4th phase, 21st page, in August, 2012) the tungsten concentrate tungstenic 2.56%, the tungsten recovery rate 77.41% that obtain.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (13)
1. a centrifugal separation device, is characterized in that its structure comprises:
Device case, this housing is a vertical closed tubular shell, tubular shell lower sidewall have concentrate gape and tailing outlet port, on push up and have iron ore feeding hole between two parties;
Centrifugal basket, this centrifugal basket be one be centrally placed in device case, bottom is fixed on through the round frusto-conical barrel on the rotating shaft of device case lower shoe; The outer side edges edge, upper end of its cylindrical shell is connected with horizontal ring flat-plate; The upper inside wall of its cylindrical shell is provided with horizontal bar shaped ring-type concentrate enrichment groove, concentrate enrichment groove is uniformly distributed and arranges several arc-shaped concave pits, have concentrate mineral ejection hole on each arc-shaped concave pit summit; Each concentrate mineral ejection hole is provided with pneumatic control valve;
Internal partition, its internal partition is that two block gaps are arranged at device case cylindrical shell and vertical section of tubular dividing plate between centrifugal basket, is fixed on device case base plate bottom it; Wherein on internal layer dividing plate along being positioned at the pneumatic control valve lower end that centrifugal basket is provided with, the upper edge of outer internal partition is inwardly provided with and is positioned at centrifugal basket cylindrical shell upper end outer side edges along the annular slab under upper affixed horizontal ring flat-plate;
Concentrate chute plate, this concentrate chute plate is be fixed in the strip helical form batten on internal layer dividing plate outer wall and outer dividing plate inwall; Concentrate chute plate tail end is provided with the concentrate discharge pipe through device case base plate;
Mine tailing chute plate, this mine tailing chute plate is the strip helical form batten be fixed in outer dividing plate outer wall and inner vertical walls; The tailing outlet port that the tubular shell lower sidewall that its mine tailing chute plate lower end is positioned at device case has;
Mineral-feeding pipe, this mineral-feeding pipe vertically penetrates device case upper plate, stretches in centrifugal basket.
2. a kind of centrifugal separation device according to claim 1, it is characterized in that its structure also comprises the frame be positioned under device case, this frame is provided with brace table plate, and it supports air compressor platen being fixed with and driving the motor of centrifugal basket connection rotating shaft, control the pneumatic clamps control valve that centrifugal basket concentrate mineral ejection hole is provided with.
3. a kind of centrifugal separation device according to claim 1, it is characterized in that supporting on platen at device case base plate and frame being provided with bearing block, described rotating shaft supports platen through device case base plate and frame, is fixedly connected by bearing; Described rotating shaft connects with drive motors belt; The quill shaft that described rotating shaft is top closure, upper portion side wall has some passages, lower ending opening; This quill shaft lower end is connected with air compressor by swivel joint, solenoid directional control valve.
4. a kind of centrifugal separation device according to claim 1, it is characterized in that the described pneumatic control valve be provided with on each concentrate mineral ejection hole is pneumatic clamps pipe valve, this pneumatic clamps pipe valve connects with the annular air supply pipe be fixed on centrifugal basket outer wall, and some passages that annular air supply pipe is had by connecting tube and rotating shaft upper portion side wall connect.
5. a kind of centrifugal separation device according to claim 1, it is characterized in that its structure also comprises concentrate chute jet water spout, this jet water spout is arranged on the device case base plate below concentrate chute plate.
6. a kind of centrifugal separation device according to claim 1, it is characterized in that its structure also comprises mine tailing chute jet water spout, this jet water spout is arranged on the outer internal partition outside mine tailing chute plate.
7. a kind of centrifugal separation device according to claim 1, it is characterized in that its structure also comprises to ore deposit jet water spout, the side of mineral-feeding pipe should be arranged to ore deposit jet water spout, pass perpendicularly through device case upper plate, stretch in centrifugal basket, its lower end is laterally provided with flushing hole.
8. a kind of centrifugal separation device according to claim 1, be is characterized in that being fixed with base flange at centrifugal basket lower bottom part bolt, is connected by base flange with rotating shaft upper end.
9. a kind of centrifugal separation device according to claim 1, is characterized in that in centrifugal basket, bottom is provided with dampen rotor between two parties.
10. a kind of centrifugal separation device according to claim 1, is characterized in that the angle of taper of described centrifugal basket is 16 ° ~ 22 °.
11. a kind of centrifugal separation devices according to claim 1, it is characterized in that described centrifugal basket is formed by retrofit casting by ZG35 material, its inside surface roughness is 12.4 ~ 12.6 μm.
12. a kind of centrifugal separation devices according to claim 1, it is characterized in that the bar shaped ring-type concentrate enrichment groove that described centrifugal basket cylindrical shell top inner wall is provided with is uniformly distributed arranging 24 arc-shaped concave pits, the diameter of the concentrate mineral ejection hole had on each arc-shaped concave pit summit is 3 ~ 5mm.
The beneficiation method of 13. a kind of centrifugal separation devices according to claim 1, it is characterized in that the rotating speed of its Process Control of Mineral Dressing centrifugal basket is 200 ~ 1000r/min, the washing water quantity controlling concentrate chute jet water spout and mine tailing chute jet water spout is 0 ~ 3L/min; The commutation of solenoid directional control valve is 0 ~ 300Hz/min frequently.
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| CN105944825A (en) * | 2016-05-24 | 2016-09-21 | 昆明理工大学 | Beneficiation desilication enrichment method for fine-particle hematite |
| CN106925436A (en) * | 2017-04-06 | 2017-07-07 | 昆明理工大学 | A kind of sharp miniature centrifugal beneficiating equipment |
| CN107185728A (en) * | 2017-06-06 | 2017-09-22 | 中钢集团马鞍山矿山研究院有限公司 | A kind of vertical centrifugal ore selector of being capable of continuous ore discharge of Hematite separation |
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| CN106925436B (en) * | 2017-04-06 | 2022-12-23 | 昆明理工大学 | Tapered centrifugal ore dressing equipment |
| CN107185728A (en) * | 2017-06-06 | 2017-09-22 | 中钢集团马鞍山矿山研究院有限公司 | A kind of vertical centrifugal ore selector of being capable of continuous ore discharge of Hematite separation |
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| CN107321506A (en) * | 2017-08-15 | 2017-11-07 | 合肥明英富海生物科技有限公司 | A kind of rotor assembly of centrifuge |
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| CN108283999A (en) * | 2018-01-31 | 2018-07-17 | 湖北环电磁装备工程技术有限公司 | A kind of centrifugal ore separator that permanent magnet synchronous motor directly drives |
| CN108311521A (en) * | 2018-02-11 | 2018-07-24 | 沈于酰 | Method for processing kitchen waste and equipment |
| CN108311295A (en) * | 2018-04-23 | 2018-07-24 | 中国矿业大学(北京) | A kind of compound force field step reinforcing centrifugal ore separator |
| CN109225676A (en) * | 2018-10-16 | 2019-01-18 | 高根树 | Interior gyrator solid-liquid centrifugal separating device |
| CN110237942A (en) * | 2019-07-03 | 2019-09-17 | 辽宁科技大学 | A kind of centrifuge cone and water-jacket typ centrifuge with compound force field |
| CN111871590A (en) * | 2020-06-19 | 2020-11-03 | 四川轻化工大学 | Excitation type mineral sorting system and sorting method thereof |
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