CN203508213U - Impulse jetting foam flotation machine - Google Patents

Abstract

The utility model relates to an impulse jetting foam flotation machine. The impulse jetting foam flotation machine comprises a material feeding pipe, an impulse air reactor, a gas storage isolation pipe, a downwards flushing pipe, a pulp distributor, a flotation machine groove body and a tailings pipe. The material feeding pipe, the impulse air reactor, the gas storage isolation pipe, the downwards flushing pipe and the pulp distributor are communicated from top to bottom. The pulp distributor is located at the center of the bottom in the groove body. The tailings pipe is connected with the outer bottom of a flotation groove and used for discharging seperated tailings. The impulse jetting foam flotation machine can generate sufficient pulp ejection flow velocity under small pump pressure, the pressure of a pump and a pipe network is reduced and energy consumption and material cost are reduced. Meanwhile, the air intake amount is boosted and the processing capacity of the flotation machine is indirectly improved. Due to the unique high impacting performance of impulse fluid, the pulp stirring effect is better. Impulses and pulp flotation are combined to generate a new action, namely due to the cavatition effect, rich micro bubbles are concentrated on the surfaces of mine particles. Thus, the aim of flotation work is achieved. The impulse jetting foam flotation machine can play a great role in further improving a flotation index.

Description

A kind of impulse jet type froth flotation machine

Technical field

The utility model relates to a kind of impulse jet froth flotation machine that completes sorting mineral and collection under pulse condition.

Background technology

Froth flotation is a kind of method that tiny material is separated from suspension.Utilize the flotation device of froth flotation to have agitation type flotation machine and air jet flotation machine, wherein air jet flotation machine is that the principle of utilizing ore pulp to spray generation negative pressure is forced air amount, form gasification ore pulp generation foam and carry out flotation, because it does not need air press-fit equipment, so have advantages of that treating capacity is large, energy consumption is little.

Pulsing jet is non-solid jet, and the principle that pulsing jet occurs is energy storage power source being provided by certain device, transmits discontinuously feedwater, makes water obtain huge energy and penetrates through nozzle, forms the pulsing jet that is similar to shell.Make to spray flotation and be stuck in continuous this level of water injection flotation.Air jet flotation machine represents that type is a kind of " air jet flotation machine " that Chinese invention patent 92229333.3 discloses, this flotation device has replaced traditional mechanical stirring device with injecting type agitating device, cell body sidewall is offered to opening simultaneously, and be added to hopper, thereby flotation device production capacity is improved greatly, also low production consumed.China Patent No. is 200720062289.5 " short column jet flow floatation machine " owing to being connected having increased T-shaped thread regulator between reflecting plate and mineralising pipe, makes that flotation of ore pulp is more stable, mineralising is more abundant.

Above-mentioned two kinds of flotation devices respectively have deficiency but after all because present all ejector flotation machines are all to adopt continuous water to spray, therefore there is shortcoming: primary need high power, high-intensity ore slurry pump carry out transfer ore pulp, when ore pulp forms jet, need very large pressure, this is just very high to the requirement of ore slurry pump.The too small ore pulp treating capacity that makes of the second flotation device jet blower is on the low side, because jet blower increase can make ore pulp aeration quantity reduce, can not meet flotation requirement, that is to say that aeration quantity is not enough.The 3rd flotation device auxiliary facility is as too large in equipment costs such as pipe networks, owing to requiring large institute to transport ore pulp with high-intensity pipeline to ore pulp pressure.

Summary of the invention

The purpose of this utility model be for existing air jet flotation machine when forming jet required overhigh pumping pressure, transport ore pulp ductwork pressure large, produce in large, the deficiency such as ore pulp aeration quantity is relatively little of energy consumption, a kind of new-type flotation device that adopts pulse theory is provided, with high voltage pulse water, spray and replace common continuous water injection to reduce the requirement to ore slurry pump pressure, reduce cost and the maintenance frequency of pipe network, also reduce energy consumption simultaneously.

The technical solution of the utility model is: a kind of impulse jet type froth flotation machine; this flotation device comprises cell body and pulse inflating and stirring device; it is characterized in that; the top of described cell body is that cylindric bottom is taper; the top of cell body is a upwards cone shape downflow weir for convergent; it is between 10 ~ 20 degree around, described guiding gutter angle of inclination that the surrounding of described downflow weir is provided with guiding gutter inclined ring; Described guiding gutter forms concentrate pipe compared with the downward opening-nozzle of lower end road; The bottom of described cell body is provided for getting rid of the debris tube of mine tailing, and described cell body is connected by welding manner with debris tube with downflow weir, guiding gutter, concentrate pipe;

Described pulse flotation device inflating and stirring device consists of feeding pipe, lower washing pipe, pulp distributer, top nozzle, pulse tube, lower nozzle, gas storage pipe and air admission hole;

Wherein, described feeding pipe, top nozzle, pulse tube and lower nozzle are for coaxially installing successively from top to bottom, and connected mode is that bolt closely connects, and described top nozzle, pulse tube and lower nozzle form a space, and this space becomes pulse chamber;

Described gas storage pipe upper end is connected with the lower end of described lower nozzle, and described gas storage pipe bottom surrounding evenly has some for managing the air admission hole of inner air and outer air exchange;

Described lower washing pipe is a pipe for tapered diameter from top to bottom, the upper end of described lower washing pipe extend in described gas storage pipe, but top does not contact and interspaces with the end of described lower nozzle, the end of described gas storage pipe and the middle part of described lower washing pipe are threaded connection, between described in described gas storage pipe and described lower washing pipe, leave space and form air storage chamber, described air storage chamber communicates with air admission hole and lower washing pipe inner space; The lower end of described lower washing pipe extend in described cell body, and the end of described lower washing pipe is connected with the described pulp distributer that is placed in the interior center of described cell body, and the upper surface of described pulp distributer evenly has two-layer 8 ~ 16 ore pulp dispensing orifices.

Further, respectively there are a through hole in described top nozzle central authorities and lower nozzle central authorities, and described top nozzle is formed by connecting by stand upside down tapered hole and a roundlet cylinder hole, and the cone angle that described handstand is bored is 120 ° ~ 150 °; Described lower nozzle-integrated be the conoid structure of hollow, its cone angle is 110 ° ~ 130 °, there is an excessive angle upper taper jut of described lower nozzle and spray orifice upper end, excessively the angle at angle is at 30 ° ~ 70 °.

Further, the diameter of described feeding pipe is D, and the nozzle diameter of described top nozzle is D1; The diameter of described pulse tube is D0, highly for L; Described lower nozzle diameter is D2, and D0/D1<4; L/D<2; D2>D1; D1/D0=0.25 ~ 0.3.

Lower washing pipe is a pipe increasing gradually to port of export internal diameter from arrival end, one section of pipe that lower washing pipe upper-end inner diameter is less forms mixing chamber, pulse flow of slurry completes and the mixing of air at this, the larger tubular of bottom diameter becomes diffuser casing, the ore pulp that completes inflation is separated out and is become air micro-bubbles from ore pulp liquid phase through diffuser casing gas, and air micro-bubbles has formed good flotation bubble system jointly with the larger bubble forming at mixing chamber before this.

On lower washing pipe, top does not contact with lower nozzle, leaves a bit of gap and forms semi-open space, for air storage chamber gas, enters mixing chamber, and still lower washing pipe top is generally highly not less than nozzle ring bottom height.

Pulp distributer is round pie, and boring and central upper portion are communicated with lower washing pipe lower end, and center surrounding evenly has inside and outside two-layer alternate totally 8 ~ 16 outlets nozzle bore upward and is used for distributing ore pulp to flotation cell.

Cell body intermediate host is cylindric, and cylindric major trough physical efficiency is disperseed the most even with flotation volume and ore pulp that minimal material completes requirement; On flotation cell, part is a upwards upright coniform downflow weir for convergent, forms secondary enrichment phenomenon in the process that flotation froth rises in downflow weir, is beneficial to enrichment and the collection of qualified concentrate containing, for improving froth concentrate taste, has very large meaning; Lower part is the coniform collection discharge that is beneficial to mine tailing of standing upside down.

Around downflow weir around, guiding gutter is the outflow for concentrate product compared with the downward perforate connecting pipe of low side for guiding gutter inclined ring.

The beneficial effects of the utility model are: owing to adopting technique scheme, compact conformation, the technique of this device are simple, ore pulp is compared common flotation device after by pulse of air reactor in the situation that pressure, sectional area are identical, due to pulse mode to the utilization rate of jet energy than high 18% left and right of the utilization rate of solid jet, pulsing jet speed is greatly improved, the operating efficiency of flotation device is significantly increased, and equipment especially compare common ejector flotation machine and decline to some extent by cost, the energy consumption cost of pump like this.

Peculiar shock insulation stirring action of impulse jet because pulse of air reactor produces, makes impulse jet flotation device stronger to the stirring action of ore pulp.

When passing through air reactor, ore pulp can produce strong air swirl in reactor cavity, these whirlpools have increased the cut roll effect of flow of slurry, the cut roll effect of impulse jet flotation device is stronger by 32% than the cut roll effect of common ejector flotation machine, the enhancing of volume and effect makes ore pulp sweep along more gas, has increased the aeration quantity of ore pulp.

While finding pulse of air reactor to apply to flotation of ore pulp through experiment, there is the additional newly-generated effect unique that is conducive to flotation, this effect is unexistent in the field of other apply pulses, ore pulp is to be mixed by solid-liquid two-phase, and the granularity of mineral grain is generally in certain particular range, due to the cavitation of ore pulp in pulse type reactor chamber, micro-bubble not only enters ore pulp but also can be enriched in largely on target mineral grain, this just flotation operation lack, this new phenomenon has been optimized ore pulp gasification and flotation efficiency, lifting for the concentrate rate of recovery has impetus.

Accompanying drawing explanation

Fig. 1 is overall structure schematic diagram of the present utility model.

Fig. 2 is pulse inflating and stirring device structural representation of the present utility model.

Fig. 3 be in Fig. 1 A2-A2 to sectional structure schematic diagram.

Fig. 4 be in Fig. 1 A1-A1 to sectional structure schematic diagram.

In figure: 1, feeding pipe, 2, lower washing pipe, 3, pulse inflating and stirring device, 31, top nozzle, 32, pulse tube, 33, lower nozzle, 34, gas storage pipe, 35, air admission hole, 36, pulse chamber, 37, air storage chamber, 4, pulp distributer, 41, ore pulp dispensing orifice, 5, cell body, 51, downflow weir, 52, guiding gutter, 53, concentrate pipe, 54, debris tube.

The specific embodiment

below in conjunction with accompanying drawing, the technical solution of the utility model is described further.

Referring to Fig. 1,2,3,4, pulse flotation device overall structure as shown in fig. 1, comprises feeding pipe 1, lower washing pipe 2, pulp distributer 4, pulse inflating and stirring device 3 and cell body 5;

Wherein, cell body 5 tops are that cylindric bottom is taper, and cell body 5 is topmost a upwards circular cone dress downflow weir 51 for convergent, the surrounding of downflow weir 51 have guiding gutter 52 inclined rings around, guiding gutter 52 angles of inclination are generally between 10 ~ 20 degree; Guiding gutter 52 forms concentrate pipe 53 compared with the downward opening-nozzle of lower end road; Mine tailing is got rid of by debris tube 54 in the bottom of cell body 5, between cell body 5 each several parts, by welding manner, connects.

Feeding pipe 1 is connected for feeding ore pulp with outside ore slurry pump; Feeding pipe 1, top nozzle 31, pulse tube 32 and lower nozzle 33 are coaxial installation, and connected mode is that bolt closely connects, and top nozzle 31, pulse tube 32 and lower nozzle 33 form a space, and this space becomes pulse chamber 36.What be connected with lower nozzle 33 bottoms is gas storage pipe 34, gas storage pipe 34 bottom surroundings evenly have 2 ~ 6 air admission holes 35 for managing inner air and outer air exchange, lower washing pipe 36 is pipes for tapered diameter from top to bottom, lower washing pipe 36 upper ends extend in gas storage pipe 34, but top does not contact and leaves a fixed gap with lower nozzle 33; The middle part of the lower end of gas storage pipe 34 and lower washing pipe 36 is threaded connection, and leaves space between the two and forms air storage chamber 37, and air storage chamber 37 communicates with air admission hole 35 and lower washing pipe inner space.Pulp distributer 4 is connected with lower washing pipe 36, if Fig. 5 pulp distributer 4 is towards evenly having two-layer 8 ~ 16 ore pulp dispensing orifices 41 above.Pulse agitating device removes pulp distributer 4 and lower washing pipe 2 bottoms are positioned at cell body 5, and remainder is positioned at the central authorities top of cell body 5.

Each reactor is equipped with an ore slurry pump, the size that remains on feeding pipe 5 diameter D within the scope of 15 ~ 25m/s, top nozzle 31 central nozzle diameter D1, pulse tube 32 diameter D0 height L, lower nozzle 33 diameter D2 in effluxvelocity is to be determined by process lot size, but needs full following condition:

D0/D1<4，L/D<2，D2>D1，D1/D0=0.25~0.3

Top nozzle is that handstand tapered hole and a roundlet cylinder hole are formed by connecting, and circular cone cone angle is that 120 ~ 150 degree play the effect that water conservancy diversion reduces fluid energy loss; Lower nozzle-integrated be that the conoid structure cone angle of hollow is 110 ~ 130 degree, lower nozzle upper taper jut plays collision body effect and there is an excessive angle spray orifice upper end, angle is spent and is beneficial to high speed ore pulp all by lower nozzle 30 ~ 70.

The course of work of the present utility model is as follows:

During work, the ore pulp preparing is sent under the pressure of 0.25 ~ 0.30MPa to feeding pipe 1 by ore slurry pump, ore pulp enters into feeding pipe 1 afterwards due to the effect of rectification body 2, and ore pulp keeps steady flow to reduce eddy current effect.Along feeding pipe 1 ore pulp, arrive top nozzle 31 places, the pyramidal structure of top nozzle 31 makes ore pulp enter the central nozzle of top nozzle 31 and complete pressurization in compared with slight drag situation.Ore pulp is injected in the pulse chamber being surrounded by pulse tube 32 at a high speed through top nozzle 31, due to the unique texture of pulse chamber's internal cavities and the effect of high speed flow of slurry, in pulse chamber, formed the air-swirl of periodic rotary, and this periodicity air-swirl makes pulse chamber's inner air pressure skewness, and then high speed ore pulp fluid is produced to periodic iris action, finally form annular fluid suction-type pulsing jet.Pulse flow of slurry enters into through lower nozzle 33 mixing chamber being surrounded by lower washing pipe 36 tops, now ore pulp fluid velocity is between 15 ~ 20m/s, flow of slurry has at a high speed formed the negative pressuren zone that peak suction is 0.6 ~ 0.8MPa in mixing chamber, the appearance of negative pressuren zone makes air enter in a large number mixing chamber by air admission hole 35, and now the special construction of air intake duct 35 and gas dome makes whole breathing process in metastable state.Because pulsing jet at a high speed makes air dispersion become minute bubbles to realize the preliminary gasification of ore pulp to the volume of wrapping up in of air with shear action, the ore pulp of preliminary gasification through making bubble further disperse in ore pulp and separate out with microvesicle under the folding structure effect at lower washing pipe 2 places, finally forms the microvesicle of even mineralising again.The ore pulp that completes bubble mineralization finally enters pulp distributer and completes floatation process, concentrate foam enters among guiding gutter 52 through downflow weir 51, guiding gutter 52 flows into by gravity the concentrate product of having collected in concentrate pipe 53, and the mine tailing of flotation is being for further processing after debris tube 54 is collected.

Claims (3)

1. an impulse jet type froth flotation machine; this flotation device comprises feeding pipe (1), lower washing pipe (2), pulp distributer (4), pulse inflating and stirring device (3) and cell body (5); it is characterized in that; the top of described cell body (5) is that cylindric bottom is taper; the top of described cell body (5) is a upwards cone shape downflow weir (51) for convergent; it is between 10 ~ 20 degree around, described guiding gutter (52) angle of inclination that the surrounding of described downflow weir (51) is provided with guiding gutter (52) inclined ring; Described guiding gutter (52) forms concentrate pipe (53) compared with the downward opening-nozzle of lower end road; The bottom of described cell body (5) is provided for getting rid of the debris tube (54) of mine tailing, and described cell body (5) is connected by welding manner with downflow weir (51), guiding gutter (52), concentrate pipe (53) and debris tube (54);

Described pulse inflating and stirring device (3) consists of top nozzle (31), pulse tube (32), lower nozzle (33), gas storage pipe (34) and air admission hole (35);

Wherein, described feeding pipe (1), top nozzle (31), pulse tube (32) and lower nozzle (33) are for coaxially installing successively from top to bottom, connected mode is that bolt closely connects, described top nozzle (31), pulse tube (32) and lower nozzle (33) form a space, and this space becomes pulse chamber (36);

Described gas storage pipe (34) upper end is connected with the lower end of described lower nozzle (33), and described gas storage pipe (34) bottom surrounding evenly has some for managing the air admission hole (35) of inner air and outer air exchange;

Described lower washing pipe (2) is a pipe for tapered diameter from top to bottom, the upper end of described lower washing pipe (2) extend in described gas storage pipe (34), but top does not contact and interspaces with the end of described lower nozzle (33), the middle part of the end of described gas storage pipe (34) and described lower washing pipe (36) is threaded connection, between described gas storage pipe (34) and described lower washing pipe (2) are described, leave space and form air storage chamber (37), described air storage chamber (37) communicates with air admission hole (35) and lower washing pipe inner space; The lower end of described lower washing pipe (2) extend in described cell body (5), the end of described lower washing pipe (2) is connected with the described pulp distributer (4) that is round pie that is placed in the interior center of described cell body (5), and the upper surface of described pulp distributer (4) evenly has two-layer 8 ~ 16 ore pulp dispensing orifices (41).

2. impulse jet type froth flotation machine according to claim 1; it is characterized in that; respectively there are a through hole in described top nozzle (31) central authorities and lower nozzle (33) central authorities; described top nozzle (31) is formed by connecting by handstand tapered hole and a roundlet cylinder hole; wherein, the cone angle of handstand cone is 120 ° ~ 150 °; Described lower nozzle (33) integral body is the conoid structure of hollow, and its cone angle is 110 ° ~ 130 °, and there is an excessive angle upper taper jut of described lower nozzle (31) and through hole upper end, and excessively the angle at angle is 30 ° ~ 70 °.

3. impulse jet type froth flotation machine according to claim 1, is characterized in that, the diameter of described feeding pipe (1) is D, and the nozzle diameter of described top nozzle (31) is D1; The diameter of described pulse tube (32) is D0, highly for L; Described lower nozzle (33) diameter is D2, and D0/D1<4; L/D<2; D2>D1; D1/D0=0.25 ~ 0.3.

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