CN202725305U - Desliming equipment for beneficiation - Google Patents
Desliming equipment for beneficiation Download PDFInfo
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- CN202725305U CN202725305U CN 201220410977 CN201220410977U CN202725305U CN 202725305 U CN202725305 U CN 202725305U CN 201220410977 CN201220410977 CN 201220410977 CN 201220410977 U CN201220410977 U CN 201220410977U CN 202725305 U CN202725305 U CN 202725305U
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- desliming
- thickener
- water pipe
- annular conduit
- pond body
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Abstract
The utility model discloses desliming equipment for beneficiation. The desliming equipment for beneficiation comprises a thickener pool, an overflow weir is arranged on the periphery of the thickener pool, a rake frame used for cleaning ore pulp settled in the pool to a sand settling port at the bottom of the pool is arranged at the bottom of the thickener pool, and water pipes are arranged at height positions between the overflow liquid level of the desliming equipment and the rake frame and are provided with upward water outlets. The desliming equipment for beneficiation has the advantages of good desliming effect, simple structure, convenience in mounting, low cost and the like.
Description
Technical field
The utility model relates to the relevant device that a kind of ore dressing is used, and relates in particular to the desliming device that a kind of ore dressing is used.
Background technology
In beneficiation flowsheet, the existence of sludge is very obvious to the harmful effect of the follow-up sorting operations such as flotation, be mainly manifested in: 1) particle in the sludge is generally micro-size fraction, difficulty is attached to bubble surface and forms mineralized froth layer emersion, be attached to easily on the contrary the coarse granule surface and form slime coating, can significantly reduce the floatability of the selective and coarse granule gangue mineral of reverse flotation process; 2) specific surface of sludge and surface energy are large, can consume a large amount of floating agents, increase beneficiation cost; 3) particulate covers on the bubble surface, and bubble is reduced capture rate, the contact rate of ore particle, affects the carrying capacity of bubble.Therefore, for the follow-up technological process that flotation operation is arranged, the industrial sludge of must taking measures to remove.
Process the measure of sludge, common are and strengthen ore pulp dispersion, classification, desliming etc.Wherein, adopting the method removal sludge of desliming is common way.Be used for the equipment of desliming, common are hydrocyclone, thickener, various desliming buckets etc.Cyclone is a kind of efficient simple desliming device, have equipment take up an area little, treating capacity large, the characteristics of small investment, removing of the sludge of, fine size light for density is effective especially, but the desliming effect of cyclone is vulnerable to the impacts such as feed ore concentration and pressure, easily fluctuation, and be fully inapplicable for selective flocculation to remove slime.And easy desliming bucket, treating capacity is limited and wayward, and is inapplicable for large-scale mine.Compare cyclone, thickener has steadily reliably advantage, so that process system has larger flexibility and adaptability, and thickener can also adopt the process of selective flocculation, thereby has a good application prospect.
Adopt common thickener as shown in Figure 1, although certain desliming effect can be arranged, when ore pulp chats cement content is larger, the phenomenon that acts on and form non-selective gathering, unite can occur to coagulate mutually in the part sludge, causes granularity to increase, and weight increases, vertical sedimentation speed increases, in advance sedimentation.In sedimentation time one timing, when the thickener radius was larger, the sludge horizontal throw was longer, and sludge needs could arrive downflow weir through long stroke, makes sludge not arrive downflow weir just at the regional subsidence near downflow weir, thereby does not reach the purpose of as far as possible desliming.This part sludge enters flotation, and particularly reverse flotation work can worsen the indexs such as flotation grade, the rate of recovery.Therefore, improve traditional thickener, improve the desliming effect, and make equipment enlarging, have very positive meaning.
The utility model content
The technical problems to be solved in the utility model is to overcome the deficiencies in the prior art, and the desliming device that is used for ore dressing that a kind of desliming is effective, simple in structure, easy for installation, cost is low is provided.
For solving the problems of the technologies described above, the technical scheme that the utility model proposes is a kind of desliming device for ore dressing, described desliming device comprises thickener pond body (being specially adapted to the thickener of diameter more than 12m), the periphery of thickener pond body arranges downflow weir, the bottom of thickener pond body is provided with the harrow frame at ore pulp cleaning spigot place at the bottom of the pond that will deposit in the pond, height and position between described desliming device overflow liquid level and described harrow frame is provided with water pipe, offers the delivery port that is directed upwardly on the water pipe.
In the above-mentioned desliming device, the top of described thickener pond body preferably is provided with a crane span structure, and described water pipe is connected in the crane span structure below.
In the above-mentioned desliming device, described water pipe is preferably the height-adjustable water pipe.Realize that adjustable for height apparatus and method can be selected to install according to putting into practice needs by those skilled in the art voluntarily.
In the above-mentioned desliming device, described thickener pond body is preferably cylindrical shape or similar columnar other shapes (for example top cylinder+bottom inverted cone), the corresponding annular conduit that is preferably of described water pipe, even on the described annular conduit (or equidistantly) is laid with a plurality of delivery ports.A plurality of delivery ports on the same annular conduit preferably are laid on the annular conduit equably around the central axis (vertically) of annular conduit.
In the above-mentioned desliming device, the quantity of described annular conduit is preferably more than two, and each annular conduit has different diameters, the central axis of the annular conduit of described different-diameter all with the central axes of thickener.Preferred, the quantity of described annular conduit is two, comprises two annular conduits of large and small different-diameter (diameter of annulus); If the internal diameter of described thickener pond body is D, the diameter of major diameter annular conduit is the distance that central axis is arrived in the d1(pipe section center of circle, does not namely consider the pipe section size, together lower), the diameter of minor diameter annular conduit is d2, and d1/D=75%～85% is then arranged, d2/D=50%～60%.Preferred, the degree of depth of establishing described thickener pond body is H, and the fitting depth (apart from the height of overflow liquid level) of two described annular conduits in the body of thickener pond is h, and h/H=15%～25% is then arranged.
In the above-mentioned desliming device, the annular conduit of described different-diameter preferably be arranged in the body of thickener pond form on the differing heights position stepped, and from the horizontal center of thickener pond body the height to periphery reduces (being that the degree of depth increases gradually) gradually.
In the above-mentioned desliming device, by being set, the inverted T-shaped tube connector described delivery port is divided be located at the inside and outside both sides of water pipe on the described water pipe, to produce better ascending current.
In the above-mentioned desliming device, the ore pulp of described thickener pond body preferably is arranged on the top of pool center to entrance.
The operation principle of the utility model desliming device mainly is: desliming device of the present utility model is applied to make up desliming process, large for the mine treatment scale, as to need the larger-diameter thickener of employing to carry out desliming situation, within certain sedimentation time, because the diameter of thickener increases, sludge need to could arrive through long horizontal throw the downflow weir of thickener periphery, and sludge may not arrive downflow weir just in the near zone sedimentation near downflow weir; The utility model is by improving desliming device, in the body of thickener pond, set up delivery port water pipe up, this so that the sludge particle by originally only be subjected to gravity and because of the center to mineral products give birth to the horizontal thrust role transformation of the downflow weir direction triple role for the external force vertically upward that is subjected to gravity, horizontal thrust and ascending water and provides, this so that the sinking speed of sludge particle in water slow down, movement locus changes, vertical stroke reduces within certain sedimentation time, can reach the downflow weir place and is collected to ensure more sludge particles.In the running of the utility model desliming device, can carry out Real-Time Monitoring (but also manual sampling monitoring) to feed ore concentration, effluent concentration, the overflow grade of desliming device; The water supply pressure of water pipe, flow want evenly, stable, and can automatically adjust (but also manual adjustments) to water flow according to the monitoring situation of giving ore deposit and overflow.
Compared with prior art, the utility model has the advantage of:
1. by the method that increases ascending current traditional thickener is improved, changed the movement locus of sludge in thickener desliming process, make the sludge particle downflow weir that flows to as much as possible, improved the desliming effect.
2. the utility model can be adjusted the flow of ascending current automatically according to the result of feed ore concentration, effluent concentration and the overflow grade Real-Time Monitoring of desliming device, can dynamically control the desliming process, thereby prevent that the desliming link from fluctuation occuring follow-up flotation operation is exerted an influence.
3. the utility model also can be adjusted the flow of ascending current according to the difference of water pipe height and position, to realize sludge movement of particles track being controlled better reinforcement desliming effect.
Desliming device of the present utility model can effective application in the desliming process of ore dressing, its successful Application not only can be enriched the selection space of desliming device, and can promote the selective flocculation method, in conjunction with the application prospect of concentrated type desliming device in the mineral dressing and desliming field.
Description of drawings
Fig. 1 is the structural representation (main looking) of existing common thickener.
Fig. 2 is the main TV structure schematic diagram of desliming device among the utility model embodiment.
Fig. 3 is the cutaway view at A-A place among Fig. 2.
Fig. 4 is the stressed mutation analysis figure of the sludge particle of desliming device among common thickener and the utility model embodiment.
Fig. 5 is the main TV structure schematic diagram of the utility model desliming device when adopting stepped annular conduit.
Fig. 6 is that desliming device is applied to process flow diagram in the desliming process among the utility model embodiment.
Marginal data:
1. thickener pond body; 11. spigot; 2. downflow weir; 3. harrow frame; 4. annular conduit; 41. delivery port; 42. outer shroud water pipe; 43. interior ring water pipe; 44. inverted T-shaped tube connector; 5. ore pulp is to entrance; 6. crane span structure; 7. sludge settling zone; 8. annular water inlet pipe; 9. water-supply-pipe; 10. bracing frame.
The specific embodiment
Below in conjunction with Figure of description and specific embodiment the utility model is further described.
Embodiment:
A kind of such as Fig. 2, the desliming device that is used for ore dressing shown in Figure 3, this desliming device comprises that thickener pond body 1(can be steel construction or xoncrete structure etc.), thickener pond body 1 is class cylindrical shape (top cylinder+bottom inverted cone), the ore pulp of thickener pond body 1 is arranged on the top of pool center to entrance 5, the peripheral top of thickener pond body 1 arranges downflow weir 2, the bottom of thickener pond body 1 is provided with the harrow frame 3 at ore pulp cleaning spigot 11 places at the bottom of the pond that will deposit in the pond, harrow frame 3 is that a cover is by the steel rake around thickener pond body 1 center automatic rotation of central rotating shaft transmission, it harrows the denseer ore pulp in bottom around the thickener pond body 1 hold together to the centre, ore pulp is flowed away from spigot 11, improve the thickening efficiency of desliming device.
Be provided with annular water inlet pipe 8 in the horizontal central area of present embodiment desliming device, annular water inlet pipe 8 is connected with two annular conduits 4 along thickener pond body 1 radially-arranged diverging water-supply-pipe 9 by eight, two annular conduits 4 are on the height and position between overflow liquid level and the harrow frame 3, comprise outer shroud water pipe 42 and interior ring water pipe 43, all offer a plurality of delivery ports that are directed upwardly 41 on outer shroud water pipe 42 and the interior ring water pipe 43, a plurality of delivery ports 41 on the same annular conduit evenly are laid on the annular conduit 4 around the pool center axis.In the present embodiment, by being set, inverted T-shaped tube connector 44 make delivery port be located at the inside and outside both sides of annular conduit in 41 minutes on outer shroud water pipe 42 and the interior ring water pipe 43, to produce better ascending current.Annular conduit 4 along continuous straight runs are laid, and are connected and fixed by bracing frame 10 and crane span structure 6 with the water-supply-pipe 9 of its radial communication.The laying mode of annular conduit is conducive to guarantee that the water yield and the hydraulic pressure of each delivery port 41 places output on outer shroud water pipe 42 and the interior ring water pipe 43 are in a basic balance or equal in the present embodiment, upwards keeps basically identical to guarantee the external force vertically upward that ascending water provides in week.
In the desliming device of present embodiment, outer shroud water pipe 42 has different diameter (diameter of outer shroud water pipe 42 is greater than interior ring water pipe 43) with interior ring water pipe 43, the central axis of each annular conduit 4 of different-diameter all with the central axes of thickener pond body 1.If the internal diameter of thickener pond body 1 is D, the diameter of outer shroud water pipe 42 is d1, and the diameter of interior ring water pipe 43 is d2, and d1/D=75%～85% is then arranged, d2/D=50%～60%.If the degree of depth of thickener pond body 1 is H, outer shroud water pipe 42 and the degree of depth of interior ring water pipe 43 in thickener pond body 1 are h, and h/J=15%～25% is then arranged.
The annular conduit 4 of present embodiment is the height-adjustable water pipe, can realize by apparatus for automatically lifting the adjusting of height.Flow in the annular conduit 4 can be controlled by valve regulated.The annular conduit 4 of different-diameter also can be arranged in the thickener pond body 1 on the differing heights position, forms stepped (referring to Fig. 5), and reduces gradually to periphery height radially from body 1 center, thickener pond.
The groundwork principle of present embodiment desliming device is described below in conjunction with Fig. 1～Fig. 4.
As shown in Figure 1, during existing common thickener operation, the ore pulp that contains sludge is fed to entrance 5 by the ore pulp of body 1 center, thickener pond, the pulp solids particle from the center to around scatter and begin from top to bottom sedimentation, carrying out along with sedimentation, the pulp solids particle that density is larger deposits in body 1 bottom, thickener pond, and finally discharged from spigot 11 by the effect of the scraper plate under the harrow frame 3.Contain the sludge in the mud ore pulp because horizontal thrust and the action of gravitation that is subject to giving birth to mineral products because of the center not only radially moves to downflow weir 2 gradually along the pond body in the horizontal direction, and move to body 1 bottom, thickener pond gradually in the vertical direction.When the thickener diameter hour because sludge density is little, granularity is little, most of sludge can flow away from downflow weir 2 with water.Within certain sedimentation time, when the thickener diameter is larger, because it is larger that sludge moves to the horizontal throw that downflow weir 2 will pass through from thickener pond body 1 central axis, the part sludge may not arrive downflow weir 2 just in the sludge settling zone 7 places sedimentation near downflow weir 2, enter into the ore pulp that is deposited on body 1 bottom, thickener pond, thereby can not reach gratifying desliming effect.Because the ore pulp of pond bottom sediments often needs to carry out follow-up sorting, the sludge particle of sneaking into tends to worsen follow-up sorting index.
The desliming device of present embodiment is the improvement to existing thickener, the modified thickener of present embodiment increases in existing thickener pond body 1 and is provided with the annular conduit system, this annular conduit system makes in the thickener pond body 1 along circumferentially producing evenly, stable ascending current, under the effect of ascending current, the sludge particle that ore pulp feeds to entrance 5 is changed into by the dual function to the horizontal thrust of downflow weir direction that originally only is subjected to gravity and give birth to mineral products because of the center and is subjected to gravity, the triple role (referring to Fig. 4) of the vertically upward external force that horizontal thrust and ascending water provide, the sludge particle that is in ascending current top be subject to straight up (less than or greater than gravity) External Force Acting, the speed of its downward sedimentation diminishes or even then moves upward.As seen, because the effect of ascending water, changed the movement locus of sludge particle, reduced the sludge particle in the possibility near downflow weir 2 near zone sedimentations, make in the ore pulp (being sand setting) at the bottom of the sludge particle is not sneaked into the pond, improve the quantity that the sludge particle flows away from downflow weir 2, thereby improved the desliming efficient of thickener.
The present embodiment desliming device can carry out Real-Time Monitoring to feed ore concentration, effluent concentration, the overflow grade of desliming device as required in running; The water supply pressure of annular conduit 4, flow need evenly, stablize, and can regulate water flow according to above-mentioned Real-Time Monitoring result.
After the desliming device of present embodiment is applied to make up desliming process, it specifically may further comprise the steps: at first will (suppose production scale 2,300,000 t/a through the microfine iron ore that broken certain contains mud, iron mineral is mainly by magnetic iron ore, bloodstone and a small amount of martite form, and take magnetic iron ore as main, head grade is about 28%) adopt the closed circuit grinding system of cyclone-ball mill composition to carry out three sections ore grindings, when ore be milled to-when 0.025mm accounts for 90%, advance in the present embodiment desliming device (Φ 24m thickener) and carry out one section desliming, sand setting after one section desliming carries out weak magnetic to be roughly selected, and rough concentrate carries out follow-up sorting; Mine tailing advances present embodiment desliming device (Φ 22m thickener) and carries out two sections deslimings, and the sand setting after two sections deslimings advances present embodiment desliming device (Φ 16m thickener) and carries out three sections deslimings, and the sand setting after three sections deslimings enters flotation operation, as shown in Figure 6.The overflow of one section desliming, two sections deslimings, three sections deslimings is all made mine tailing and is processed, and the selective flocculation method is all adopted in one section desliming, two sections deslimings, three sections deslimings.As shown in table 1, use desliming device of the present utility model after, the iron grade of sand setting can progressively rise after one section desliming, two sections deslimings, three sections deslimings, iron mineral reduces with the sludge loss, both reached the purpose of removing sludge, gangue mineral, desliming is effective, has guaranteed again the rate of recovery of iron.
Table 1: desliming effect analysis
The above-mentioned mud ore pulp that contains enters reverse flotation work after three sections deslimings, finally can obtain the good mineral processing index of iron concentrate grade 63.0%, the rate of recovery 64.0%, and is as shown in table 2 below.
Table 2: mineral processing index analysis
| Name of product | Productive rate (%) | Grade (TFe%) | The rate of recovery (%) |
| Iron ore concentrate | 28.57 | 63.00 | 64.00 |
| Mine tailing | 71.43 | 14.17 | 36.00 |
| Raw ore | 100.00 | 28.12 | 100.00 |
Claims (10)
1. desliming device that is used for ore dressing, described desliming device comprises thickener pond body, the periphery of thickener pond body arranges downflow weir, the bottom of thickener pond body is provided with the harrow frame at ore pulp cleaning spigot place at the bottom of the pond that will deposit in the pond, it is characterized in that: the height and position between described desliming device overflow liquid level and described harrow frame is provided with water pipe, offers the delivery port that is directed upwardly on the water pipe.
2. desliming device according to claim 1, it is characterized in that: the top of described thickener pond body is provided with crane span structure, and described water pipe is connected in the crane span structure below.
3. desliming device according to claim 1, it is characterized in that: described water pipe is the height-adjustable water pipe.
4. according to claim 1,2 or 3 described desliming devices, it is characterized in that: described thickener pond body is cylindrical shape, and described water pipe is annular conduit, evenly is laid with a plurality of delivery ports on the described annular conduit.
5. desliming device according to claim 4 is characterized in that: the quantity of described annular conduit is more than two, and each annular conduit has different diameters, the central axis of the annular conduit of described different-diameter all with the thickener central axes.
6. desliming device according to claim 5, it is characterized in that: the quantity of described annular conduit is two, the internal diameter of establishing described thickener pond body is D, the diameter of major diameter annular conduit is d1, the diameter of minor diameter annular conduit is d2, and d1/D=75%～85% is then arranged, d2/D=50%～60%.
7. desliming device according to claim 6, it is characterized in that: the degree of depth of establishing described thickener pond body is H, the fitting depth of two described annular conduits in the body of thickener pond is h, and h/H=15%～25% is then arranged.
8. desliming device according to claim 5 is characterized in that: the annular conduit of described different-diameter be arranged on form on the differing heights position in the body of thickener pond stepped, and from the horizontal center of thickener pond body the height to periphery reduces gradually.
9. according to claim 1,2 or 3 described desliming devices, it is characterized in that: the inside and outside both sides that described delivery port divided be located at water pipe on the described water pipe by the inverted T-shaped tube connector is set.
10. according to claim 1,2 or 3 described desliming devices, it is characterized in that: the ore pulp of described thickener pond body is arranged on the top of pool center to entrance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220410977 CN202725305U (en) | 2012-08-17 | 2012-08-17 | Desliming equipment for beneficiation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220410977 CN202725305U (en) | 2012-08-17 | 2012-08-17 | Desliming equipment for beneficiation |
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| CN202725305U true CN202725305U (en) | 2013-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220410977 Expired - Lifetime CN202725305U (en) | 2012-08-17 | 2012-08-17 | Desliming equipment for beneficiation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104668085A (en) * | 2013-11-29 | 2015-06-03 | 中冶长天国际工程有限责任公司 | Slurry removal groove |
| CN107243174A (en) * | 2017-06-29 | 2017-10-13 | 江西稀有稀土金属钨业集团有限公司 | A kind of thickener |
-
2012
- 2012-08-17 CN CN 201220410977 patent/CN202725305U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104668085A (en) * | 2013-11-29 | 2015-06-03 | 中冶长天国际工程有限责任公司 | Slurry removal groove |
| CN104668085B (en) * | 2013-11-29 | 2017-09-12 | 中冶长天国际工程有限责任公司 | A kind of sloughing-off tank |
| CN107243174A (en) * | 2017-06-29 | 2017-10-13 | 江西稀有稀土金属钨业集团有限公司 | A kind of thickener |
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Granted publication date: 20130213 |