CN108561178B - Coarse tailing filling system and process - Google Patents
Coarse tailing filling system and process Download PDFInfo
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- CN108561178B CN108561178B CN201810659752.7A CN201810659752A CN108561178B CN 108561178 B CN108561178 B CN 108561178B CN 201810659752 A CN201810659752 A CN 201810659752A CN 108561178 B CN108561178 B CN 108561178B
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- 238000011049 filling Methods 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title description 6
- 230000008569 process Effects 0.000 title description 5
- 239000004576 sand Substances 0.000 claims abstract description 120
- 239000002002 slurry Substances 0.000 claims abstract description 113
- 239000002562 thickening agent Substances 0.000 claims abstract description 61
- 230000004913 activation Effects 0.000 claims abstract description 58
- 238000003756 stirring Methods 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 75
- 230000003213 activating effect Effects 0.000 claims description 21
- 230000000712 assembly Effects 0.000 claims description 17
- 238000000429 assembly Methods 0.000 claims description 17
- 238000004891 communication Methods 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 10
- 238000011010 flushing procedure Methods 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 6
- 238000004062 sedimentation Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 238000012856 packing Methods 0.000 claims 3
- 238000005429 filling process Methods 0.000 abstract description 9
- 238000002360 preparation method Methods 0.000 abstract description 4
- 239000010419 fine particle Substances 0.000 description 9
- 239000011362 coarse particle Substances 0.000 description 6
- 238000004537 pulping Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000004570 mortar (masonry) Substances 0.000 description 4
- 230000008719 thickening Effects 0.000 description 4
- 238000011001 backwashing Methods 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000008394 flocculating agent Substances 0.000 description 1
- 230000003311 flocculating effect Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/005—Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
Abstract
The invention relates to the technical field of filling, in particular to a coarse tailing filling system and a coarse tailing filling process. The coarse tailing filling system comprises a thickener, a slurry activation assembly and a sand setting tank; the thickener comprises a concentration tank and a sand discharge port arranged at the bottom of the concentration tank, the sand setting tank comprises a feed inlet, and the sand discharge port is communicated with the feed inlet; the slurry activation assembly comprises an activation air supply pipeline and an activation air nozzle communicated with the activation air supply pipeline, wherein the activation air nozzle is arranged at the bottom of a concentration tank of the thickener and is communicated with an inner cavity of the thickener. The concentration efficiency of the coarse tailings slurry is high, the coarse tailings slurry is easy to control, the coarse tailings utilization rate is high, the slurry is produced by the grit chamber, the tailings are uniformly mixed, the later stirring and the preparation of filling slurry are facilitated, the quality of the filling slurry is improved, and the filling cost is saved as a whole; the system can be arranged at a filling equipment station in a centralized manner, so that the distance between the tailing slurry and the pump is avoided, the cost is further saved, all tailings can be utilized, and the utilization rate of the tailings is improved.
Description
Technical Field
The invention relates to the technical field of filling, in particular to a coarse tailing filling system and a coarse tailing filling process.
Background
The method for thickening coarse tailings (tailings with the average particle size of more than 0.3 mm) in the related art is to use a traditional sand silo for thickening the tailings. The following disadvantages exist in using the traditional sand bin for coarse tailing thickening:
After the low-concentration slurry enters the sand bin, flocculant is directly added at the feed inlet of the sand bin, and as the sand bin is generally difficult to be provided with a self-dilution system of the flocculant, the difficulty and investment are very large, the addition of the flocculant is uneven, so that the flocculating settling effect of coarse tailings is poor, overflow water is turbid, a large number of fine particles are taken away by the overflow water, the tailings are graded, and overflow backwater is pumped to a tailing pond. Due to the loss of fine particle tailings, the utilization rate of the tailings is reduced, the sand setting efficiency of the tailings is greatly reduced, and finally the filling efficiency is influenced. The tailings are coarse, fine particles are lost after the tailings are soaked and muddy, the workability of filling slurry is greatly reduced due to the fact that the fine-particle-grade tailings are too small, the prepared filling slurry is easy to isolate and layer, a two-phase flow mode is formed, and finally poor filling quality is caused.
Disclosure of Invention
The invention aims to provide a coarse tailing filling system and a coarse tailing filling process, which are used for solving the technical problem of poor coarse tailing filling quality in the prior art.
The invention provides a coarse tailing filling system, which comprises a thickener, a slurry activation assembly and a sand setting tank; the thickener comprises a concentration tank and a sand discharge port arranged at the bottom of the concentration tank, the sand setting tank comprises a feed inlet, and the sand discharge port is communicated with the feed inlet; the slurry activation assembly comprises an activation air supply pipeline and an activation air nozzle communicated with the activation air supply pipeline, wherein the activation air nozzle is arranged at the bottom of a concentration tank of the thickener and is communicated with an inner cavity of the thickener.
Further, the number of the gas nozzles is plural; the plurality of air nozzles are sequentially arranged at intervals along the circumferential direction taking the center of the concentration tank as the center of a circle.
Further, the number of slurry activation assemblies is a plurality; the slurry activating assemblies are sequentially arranged at intervals along the radial direction taking the center of the concentration tank as the center of the circle.
Further, the coarse tailing filling system also comprises a sand discharging pipe and a back flushing assembly; one end of the sand discharge pipe is communicated with the sand discharge port, and the other end of the sand discharge pipe is communicated with the feeding port; the back flushing assembly comprises a water supply pipeline and a water nozzle communicated with the water supply pipeline, wherein the water nozzle is communicated with the sand discharge pipeline and is positioned at a position of the sand discharge pipeline close to the sand discharge port.
Further, a gate valve is arranged on the sand discharge pipeline and used for controlling the flow of slurry in the sand discharge pipe; the two back flushing assemblies are respectively positioned at two sides of the gate valve.
Further, the bottom of the grit chamber is inclined, the first end of the bottom of the grit chamber is higher than the second end of the bottom of the grit chamber, and the first end of the grit chamber is close to the sand discharge pipe; the first end to the second end of the grit chamber, the bottom of the grit chamber is provided with a plurality of water discharge ports, and each water discharge port is provided with a water discharge valve.
Further, the grit chamber also comprises a slurry making assembly; the pulping component comprises a pulping air supply pipeline and a pulping air nozzle communicated with the pulping air supply pipeline; the slurry making air nozzles are arranged at the bottom of the grit chamber, and the inner cavities of the grit chamber are communicated, and the slurry making air nozzles are multiple.
Further, the number of the sand setting tanks is at least two, and the two sand setting tanks are communicated with the sand discharging port of the thickener.
Further, the coarse tailing filling system further comprises a stirring device; the sand setting tank also comprises a discharge hole, the stirring device comprises a slurry inlet, the discharge hole is communicated with the slurry inlet, the sand discharge hole is higher than the feed hole by a set distance, and the discharge hole is higher than the slurry inlet by a set distance.
The invention also provides a coarse tailing filling process, which comprises the following steps:
Feeding the coarse tailing slurry to be concentrated into a thickener for concentration;
supplying high-pressure gas to the activation gas supply pipeline, wherein the high-pressure gas agitates tailings at the bottom of the thickener through an activation gas nozzle;
and (5) delivering the thickened tailing slurry to a grit chamber for mixing.
The invention provides a coarse tailing filling system, which comprises a thickener, a slurry activation assembly and a sand setting tank; the thickener comprises a concentration tank and a sand discharge port arranged at the bottom of the concentration tank, the sand setting tank comprises a feed inlet, and the sand discharge port is communicated with the feed inlet; the slurry activation assembly comprises an activation air supply pipeline and an activation air nozzle communicated with the activation air supply pipeline, wherein the activation air nozzle is arranged at the bottom of a concentration tank of the thickener and is communicated with an inner cavity of the thickener.
In the filling process of the coarse tailing filling system provided by the invention, firstly, low-concentration tailing slurry is sent into a thickener for concentration so as to improve the concentration of the coarse tailing slurry; and then sending the concentrated tailing slurry into a grit chamber for mixing. After the tailing slurry is settled in the thickener, the settling degree is different due to the different gravity of the fine particles and the coarse particles, so that the mixing of the fine particles and the coarse particles is uneven, the slurry is produced in the grit chamber, the fine particles and the coarse particles are uniformly mixed, and the subsequent stirring is facilitated to form filling slurry meeting the requirements.
In addition, the sand setting tank can further settle the tailing slurry, so that the concentration of the tailing slurry is further improved, and double guarantee is provided for obtaining the tailing slurry with proper concentration.
The thickener can concentrate coarse tailings slurry, separated clean water flows to a production water tank from an upper overflow port of the thickener, and the production water tank collects overflow water and provides water for other parts needing water in the system, so that water resources are saved.
The slurry with the increased concentration flows from the sand discharge port of the concentration tank of the thickener to the sand setting tank. In the process, the concentration of the tailings at the bottom of the concentration tank is highest, high-pressure gas is introduced into the activation gas supply pipeline, and the high-pressure gas sprays the tailings at the bottom of the concentration tank through the activation gas nozzle, so that the tailings at the bottom of the concentration tank are activated and loosened, caking is avoided, sand discharge is not smooth due to blocking of a sand discharge port, and the large rotation resistance of a rake frame of a thickener due to large viscosity of tailings slurry at the bottom of the concentration tank is avoided, so that rake pressing is avoided.
The concentration efficiency of the coarse tailings slurry is high, the coarse tailings slurry is easy to control, the coarse tailings utilization rate is high, the slurry is produced by the grit chamber, the tailings are uniformly mixed, the later stirring and the preparation of filling slurry are facilitated, the quality of the filling slurry is improved, and the filling cost is saved as a whole; the system can be arranged at a filling equipment station in a centralized manner, so that the distance between the tailing slurry and the pump is avoided, the cost is further saved, all tailings can be utilized, and the utilization rate of the tailings is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a coarse tailing filling system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a thickener in the coarse sand filling system shown in FIG. 1;
FIG. 3 is an enlarged view of a portion of a slurry activation assembly of the coarse tailings filling system of FIG. 2;
FIG. 4 is a schematic illustration of the slurry activation assembly of the coarse tailings filling system of FIG. 1;
FIG. 5 is a schematic view showing the construction of a grit chamber in the coarse tailings filling system shown in FIG. 1;
fig. 6 is a flowchart of a coarse tailing filling process according to an embodiment of the present invention.
In the figure: a 100-thickener; 200-a slurry activation assembly; 300-a sand setting tank; 400-sand discharge pipeline; 500-backwashing the assembly; 600-stirring device; 210-an activation gas supply line; 220-an activated gas nozzle; 310-pulping components; 311-slurry-making gas nozzle; 510-a water supply pipe; 520-water nozzle.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
FIG. 1 is a schematic diagram of a coarse tailing filling system according to an embodiment of the present invention; FIG. 2 is a schematic diagram of a thickener in the coarse sand filling system shown in FIG. 1; FIG. 3 is an enlarged view of a portion of a slurry activation assembly of the coarse tailings filling system of FIG. 2; FIG. 4 is a schematic illustration of the slurry activation assembly of the coarse tailings filling system of FIG. 1; FIG. 5 is a schematic view showing the construction of a grit chamber in the coarse tailings filling system shown in FIG. 1; fig. 6 is a flowchart of a coarse tailing filling process according to an embodiment of the present invention.
As shown in fig. 1 to 4, the coarse tailing filling system provided by the invention comprises a thickener 100, a slurry activation assembly 200 and a sand basin 300; the thickener 100 comprises a concentration tank and a sand discharge port arranged at the bottom of the concentration tank, the sand setting tank 300 comprises a feed port, and the sand discharge port is communicated with the feed port; the slurry activation assembly 200 includes an activation gas supply conduit 210 and an activation gas nozzle 220 in communication with the activation gas supply conduit 210, the activation gas nozzle 220 being disposed at the bottom of the thickening tank of the thickener 100 and in communication with the interior cavity of the thickener 100.
The thickener 100 generally mainly comprises a concentration tank, a cake frame, a transmission device, a cake frame lifting device, a feeding device, a discharging device, a signal safety device and the like. The thickener 100 is a solid-liquid separation apparatus based on gravity settling, and is typically a cylindrical shallow trough with a conical bottom built up from concrete, wood or metal welded plates as a structural material. The thickener is provided with a flocculating agent adding system and a diluting system, can effectively concentrate the tail mortar, and discharges thickened underflow mortar from a underflow opening at the bottom of the thickener 100 under the action of a rake which is installed in the thickener 100 and runs at a slow speed (1/3-1/5 r/min). The upper portion of thickener 100 produces cleaner clarified liquid (overflow) that is discharged from the top annular chute.
In the filling process using the coarse tailing filling system provided in this embodiment, the low-concentration tailing slurry is first sent into the thickener 100 to be concentrated, so as to increase the concentration of the coarse tailing slurry; and then the concentrated tailings slurry is fed into the grit chamber 300 to be mixed. After the tailing slurry is settled in the thickener 100, because the gravity of the fine particles and the coarse particles is different, the settling degree is different, the mixing of the fine particles and the coarse particles is easy to be uneven, the slurry is made in the grit chamber 300, and the fine particles and the coarse particles are uniformly mixed, so that the concentration of the slurry entering a later-stage stirring device is stable and small in fluctuation, the lime-sand ratio is accurate when the filling slurry is prepared (water and cement are added), the filling concentration is stable, and the filling quality is finally ensured.
In addition, the grit chamber 300 can further settle the tailings slurry, thereby further improving the concentration of the tailings slurry and providing double guarantee for obtaining the tailings slurry with proper concentration.
The thickener 100 can concentrate coarse tailings slurry, separated clean water flows from an upper overflow port of the thickener 100 to a production water tank, and the production water tank collects overflow water and provides water for other parts needing water in the system, so that water resources are saved.
The slurry with the increased concentration flows from the sand discharge port of the thickener 100 to the grit chamber 300. In this process, the concentration of the tailings at the bottom of the concentration tank is highest, high-pressure gas is introduced into the activation gas supply pipeline 210, and the high-pressure gas sprays the tailings at the bottom of the concentration tank through the activation gas nozzle 220, so that the tailings at the bottom of the concentration tank are activated and loosened, caking is avoided, the sand discharge opening is prevented from being blocked, the sand discharge is not smooth, and the large viscosity of the tailings slurry at the bottom of the concentration tank is also avoided, so that the rotation resistance of the rake frame of the thickener 100 is large, and the rake pressing is avoided.
The thickener 100 has high concentration efficiency and easy control, and the sand is uniformly mixed by the sand setting tank 300 to be more beneficial to the later stirring and the preparation of filling slurry, so that the filling efficiency is further improved, and the filling cost is saved as a whole; the system can be directly arranged at a filling workstation, so that slurry transportation is avoided, the cost is further saved, all tailings can be utilized, and the utilization rate of the tailings is improved.
Wherein the bottom of the thickener 100 is preferably tapered with a taper angle of any one of the intervals of 9 ° -10 °, for example 9 ° -9.5 ° or 10 °. The straight barrel section of this construction is typically shorter, the settling layer of the thickener 100 is shorter, and the resulting compressed concentration is lower than the concentration of the more tapered thickener 100. The concentration at the bottom of the thickener 100 is relatively low (coarse sand generally has good sedimentation effect and the final compression concentration is too high), so that the viscosity, shearing stress and other parameters of the tail sand slurry at the bottom are generally smaller, the resistance of the thickener 100 for rotating a harrow frame is further reduced, and the risk of harrowing is further reduced.
The activating gas nozzle 220 may be one.
Preferably, the number of the activating gas nozzles 220 is two, three or four, and the like, and when the number of the activating gas nozzles 220 is multiple, the activating gas nozzles 220 can be set according to specific conditions, for example, the activating gas nozzles are sequentially arranged at intervals along the circumferential direction taking the center of the concentration tank as the center of the circle, so that the tailings at multiple positions on the same circumference can be sprayed, the movement of the tailings is faster, the activation range is wider, smooth sand discharge is further ensured, and harrowing is further avoided.
The plurality of the activating gas nozzles 220 may all be communicated with the same activating gas supply pipe 210 in common, or some of the activating gas nozzles 220 may be communicated with one activating gas supply pipe 210 in common, or one activating gas nozzle 220 may be communicated with one activating gas supply pipe 210.
The slurry activation assembly 200 may be one.
Preferably, the slurry activating assemblies 200 are plural, such as two, three or four, and the plural slurry activating assemblies 200 are sequentially arranged at intervals in the radial direction around the center of the concentration tank, that is, the plural slurry activating assemblies 200 are sequentially arranged at intervals in the direction from the center of the concentration tank to the edge of the concentration tank. The slurry activating assemblies 200 can activate tailings at different positions of the bottom of the concentration tank, so that the high activating efficiency and the activating range are further improved, the smooth sand discharge is further ensured, and the harrow is further avoided.
Preferably, each slurry activation assembly 200 includes a plurality of activation gas nozzles 220, that is, one slurry activation assembly 200 forms a circle, and a plurality of slurry activation assemblies 200 form a plurality of circles with sequentially increased radii, so that the tailings can be activated in different diameter ranges, activation dead angles are avoided, and smooth sand discharge is ensured to the greatest extent.
Of course, the activation gas supply pipe 210 may be provided with a gas supply valve to control the flow or cut-off of the high-pressure gas, and a gas supply flow valve may be provided to adjust the flow of the gas, etc. The gas supply valve preferably employs a one-way valve for allowing gas to flow from the gas inlet of the one-way valve to the gas outlet of the one-way valve. Thus, gas backflow is avoided, the tail mortar can be loosened better, and the tail mortar can be prevented from entering the gas supply pipeline, so that the activation assembly is protected.
Specifically, as shown in fig. 3, the slurry activation assembly 200 has two slurry activation assemblies, one of which is an inner ring and the other of which is an outer ring; the slurry activating assemblies 200 of the inner ring are two evenly distributed, and the slurry activating assemblies 200 of the outer ring are four evenly distributed. Under the condition that the use is satisfied in the guarantee, avoid setting up too much and cause extravagant or make the structure complicated.
There are various structural forms of the slurrying assembly 310, such as: the motor is used for driving the stirring blade to stir the tailings in the grit chamber 300.
Preferably, the papermaking assembly 310 includes a papermaking air supply pipe and a papermaking air nozzle 311 communicated with the papermaking air supply pipe; the slurry making air nozzle 311 is arranged at the bottom of the grit chamber 300, and the inner cavity of the grit chamber 300 is communicated. Pneumatic stirring is adopted, so that on one hand, the control is convenient, and the structure is simple; on the other hand, the increase of the flow resistance of the tailings is avoided; in yet another aspect, a unified configuration may be employed with slurry activation assembly 200, employing a unified gas supply edge, thereby simplifying the overall system architecture.
Wherein, the number of the slurry-making nozzles 311 can be one, and preferably the number of the slurry-making nozzles 311 is a plurality. The plurality of slurry making gas nozzles 311 are sequentially arranged at intervals along the conveying direction of the tailings slurry, so that the tailings of the grit chamber 300 can be stirred in a large area, and the tailings can be further uniformly mixed and smoothly flow.
As shown in fig. 2 and 3, further to the above embodiments, the coarse tailing filling system further includes a sand discharge pipe and a backwash assembly 500; one end of the sand discharge pipe is communicated with the sand discharge port, and the other end of the sand discharge pipe is communicated with the feeding port; the backwash assembly 500 includes a water supply pipe 510 and a water nozzle 520 in communication with the water supply pipe, the water nozzle 520 being in communication with the discharge pipe 400 and being located in the discharge pipe 400 near the discharge port.
In this embodiment, high-pressure water is introduced into the water supply pipeline 510, and the high-pressure water washes the tailings at the sand discharge port through the water nozzle 520, that is, the water backflushes from bottom to top, further activates and loosens the tailings at the bottom of the concentration tank, and the tailings at the position are reversely washed by the water, so that the concentration of the tailings at the position can be diluted within a certain range, the blockage caused by incapability of flowing due to overlarge concentration of the tailings at the position is avoided, and smooth sand discharge is further ensured.
The water nozzle 520 may have various structural forms, for example: the water nozzle 520 is in a straight line shape, one end of the water nozzle is arranged on the inner wall of the sand discharging pipe, and the other end of the water nozzle points to the lower end of the sand discharging port (namely the position where the sand discharging port is communicated with the sand discharging pipe); the water nozzle 520 is L-shaped, one end of which is disposed on the inner wall of the sand discharge pipe, the other end of which is directed to the lower end of the sand discharge port, etc., and any structure that can enable the water to flush the bottom of the sand discharge port may be adopted.
The number of the water nozzles 520 may be one, two, three, or the like, and when the number of the water nozzles 520 is plural, the plurality of water nozzles 520 may be all in communication with one water supply pipe 510, or a part of the plurality of water nozzles 520 may be in communication with one water supply pipe 510, or the plurality of water nozzles 520 may be in one-to-one communication with the plurality of water supply pipes 510.
Backwash assembly 500 may be one.
Preferably, backwash assembly 500 is two. The sand discharge pipeline 400 is provided with a gate valve which is used for controlling the flow of slurry in the sand discharge pipe; the number of the back flushing assemblies 500 is two, and the two back flushing assemblies 500 are respectively positioned at two sides of the gate valve.
In this embodiment, two backwash assemblies 500 may provide further dual assurance for smooth flow of tailings. And the valve for controlling the circulation, cutting off or flow of the tailings is arranged between the two backwashing assemblies 500, the backwashing assembly 500 positioned at the downstream can also backwash the tailings at the valve, thereby further ensuring the smooth flow of the tailings at each port.
The gate valve comprises a manual gate valve and an electric gate valve which are sequentially arranged from top to bottom, the manual gate valve can control circulation and cutting-off of tailings, and the electric gate valve can control flow. Manual reliable, electric sensitive.
Of course, the water supply pipeline 510 may be provided with a water inlet check valve at a position close to the water nozzle 520 and a gate valve at a position far away from the water nozzle 520, the gate valve may control the water supply pipeline to be opened and closed, the water inlet check valve allows water to flow into the sand discharge pipe from the gate valve, but prevents tailing slurry from flowing into the gate valve from the sand discharge pipe, so as to protect the gate valve, prolong the service life of the gate valve, and reduce the use cost.
It should be noted that, the back flush assembly 500 needs to be used according to a specific sand setting condition, if the tailings can smoothly and normally flow into the grit chamber 300 from the sand setting pipe, the back flush assembly 500 does not need to be opened, otherwise, the back flush assembly is opened.
As shown in fig. 5, further, on the basis of the above embodiment, the bottom of the grit chamber 300 is inclined, and the first end of the bottom of the grit chamber 300 is higher than the second end thereof, and the first end of the grit chamber 300 is close to the sand discharge pipe; from the first end to the second end of the grit chamber 300, the bottom of the grit chamber 300 is provided with a plurality of water discharge ports, and each water discharge port is provided with a water discharge valve.
In this embodiment, the bottom of the grit chamber 300 is inclined, which is beneficial to flowing the tailings slurry to the next process, and avoids the reduction of the utilization rate caused by retention of the tailings.
The bottom of the sand basin 300 is provided with a plurality of water discharge ports, and each water discharge port is provided with a water discharge valve, so that the tailing slurry discharged from the sand discharge pipe can be further settled and dehydrated, and the tailing slurry meeting the required concentration is ensured. The reason for the higher tailings slurry may be that the thickener 100 itself has a small concentration, and on the other hand, the tailings slurry may be diluted during the use of the backwash assembly 500.
The angle of the inclined plane can be any value in the interval of 8-10 degrees, such as 8-9 degrees or 10 degrees, so that the use can be satisfied, and the construction trouble caused by overlarge angle can be avoided. .
Preferably, there are at least two grit chambers 300, and both grit chambers 300 are in communication with the discharge port of the thickener 100.
In this embodiment, at least two sand setting tanks 300 are provided, each sand setting tank 300 is communicated with the sand discharge port of the thickener 100, so that a plurality of sand prevention tanks can alternately perform sedimentation, drainage and sand discharge, thereby enabling the thickener 10024h to feed sand, discharging the bottom 24h, continuously discharging sand, further improving the efficiency and further reducing the filling cost.
As shown in fig. 1, on the basis of the above embodiment, further, the coarse tailing filling system further includes a stirring device 600; the grit chamber 300 further includes a discharge port, the stirring device 600 includes a slurry inlet, the discharge port is communicated with the slurry inlet, the sand discharge port is higher than the feed port by a set distance, and the discharge port is higher than the slurry inlet by a set distance.
In this embodiment, the sand discharge port of the thickener 100 is higher than the feed port of the grit chamber 300, and the discharge port of the grit chamber 300 is higher than the feed port of the stirring device 600, that is, the thickener 100, the grit chamber 300 and the stirring device 600 are in step distribution, so that the high-concentration tailings can flow from the thickener 100 to the grit chamber 300 and then flow from the grit chamber 300 to the stirring device 600 without pumping by a slurry pump, thereby avoiding the risk of pumping the coarse high-concentration tailings slurry and reducing the cost.
As shown in fig. 6, the invention further provides a coarse tailing filling process, which comprises the following steps:
S1, feeding coarse tailing slurry to be concentrated into a thickener 100 for concentration;
s21, supplying high-pressure gas to the activation gas supply pipeline 210, wherein the high-pressure gas agitates tailings at the bottom of the thickener 100 through the activation gas nozzle 220;
And S3, delivering the thickened tailings slurry to the grit chamber 300 for mixing.
Wherein, when the tailing can not normally put sand, still include:
S21, high-pressure water is supplied to the water supply pipe 510, and the high-pressure water backflushes the tailings at the sand discharge port by the water nozzle 520.
In the embodiment, the concentration efficiency of the coarse tailings is high, the coarse tailings is easy to control, slurry is produced by the sand setting tank 300, the tailings are uniformly mixed, the later stirring and the preparation of filling slurry are facilitated, the filling efficiency is further improved, and the filling cost is saved as a whole; the system can be directly arranged at a filling workstation, so that slurry transportation is avoided, the cost is further saved, all tailings can be utilized, and the utilization rate of the tailings is improved.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (6)
1. A coarse tailings packing system, comprising: a thickener, a slurry activation assembly and a grit chamber;
The thickener comprises a concentration tank and a sand discharge port arranged at the bottom of the concentration tank, wherein the sand setting tank comprises a feed inlet, and the sand discharge port is communicated with the feed inlet; the sand setting tank further comprises a slurry making assembly, wherein the slurry making assembly is used for stirring and mixing slurry;
The slurry activation assembly comprises an activation air supply pipeline and an activation air nozzle communicated with the activation air supply pipeline, and the activation air nozzle is arranged at the bottom of a concentration tank of the thickener and is communicated with an inner cavity of the thickener;
the sand discharge pipe and the back flushing assembly are also included; one end of the sand discharge pipe is communicated with the sand discharge port, and the other end of the sand discharge pipe is communicated with the feeding port;
the back flushing assembly comprises a water supply pipeline and a water nozzle communicated with the water supply pipeline, and the water nozzle is communicated with the sand discharge pipe and is positioned at a position of the sand discharge pipe close to the sand discharge port;
A plurality of water discharge ports are formed in the bottom of the grit chamber from the first end to the second end of the grit chamber, and a water discharge valve is arranged at each water discharge port;
The number of the sand setting tanks is at least two, and the two sand setting tanks are communicated with the sand discharge port of the thickener, so that a plurality of sand setting tanks can alternately perform sedimentation, water discharge and sand discharge, and the thickener can feed sand for 24 hours, discharge the material for 24 hours at the bottom and continuously discharge the sand;
The bottom of the sand setting tank is inclined, the first end of the bottom of the sand setting tank is higher than the second end of the bottom of the sand setting tank, the first end of the sand setting tank is close to the sand discharging pipe, and the angle of the inclined plane is 8-10 degrees.
2. The coarse sand filling system of claim 1, wherein the gas nozzles are a plurality; the plurality of air nozzles are sequentially arranged at intervals along the circumferential direction taking the center of the concentration tank as the center of a circle.
3. The coarse tailings packing system of claim 2 wherein the slurry activation assembly is a plurality; the slurry activating assemblies are sequentially arranged at intervals along the radial direction taking the center of the concentration tank as the center of the circle.
4. The coarse tailing filling system according to claim 1, wherein a gate valve is arranged on the sand discharge pipe, and the gate valve is used for controlling the flow rate of slurry in the sand discharge pipe;
the two back flushing assemblies are respectively positioned at two sides of the gate valve.
5. The coarse tailings packing system of claim 1 wherein the papermaking assembly comprises a papermaking air supply conduit and a papermaking air nozzle in communication with the papermaking air supply conduit;
The slurry making gas nozzles are arranged at the bottom of the grit chamber, the inner cavities of the grit chamber are communicated, and the slurry making gas nozzles are multiple.
6. The coarse sand filling system of any one of claims 1-5, further comprising a stirring device; the sand setting tank further comprises a discharge port, the stirring device comprises a slurry inlet, and the discharge port is communicated with the slurry inlet;
The sand discharge port is higher than the feeding port by a set distance, and the discharge port is higher than the slurry inlet by a set distance.
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| CN112643891A (en) * | 2020-12-21 | 2021-04-13 | 中铁建铜冠投资有限公司 | System and pulping method for pulping and filling dry mine tailings |
| CN114751436A (en) * | 2022-06-06 | 2022-07-15 | 贵州华锦铝业有限公司 | Process and system for producing series-parallel salt discharge in aluminum oxide production |
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