CN212105950U - Dehydration tailing accurate batching forced homogenization preparation structure flow filling system - Google Patents
Dehydration tailing accurate batching forced homogenization preparation structure flow filling system Download PDFInfo
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- CN212105950U CN212105950U CN202020288351.8U CN202020288351U CN212105950U CN 212105950 U CN212105950 U CN 212105950U CN 202020288351 U CN202020288351 U CN 202020288351U CN 212105950 U CN212105950 U CN 212105950U
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Abstract
The utility model provides a homogenization preparation structure flows filling system is forced to accurate batching of dehydration tailings. The filling system is composed of a feeding and metering subsystem, a stirring preparation subsystem, a slurry conveying and filling subsystem and an automatic control system. The feeding and metering subsystem comprises a dehydrated tailing feeding and metering system, a thickening water feeding and metering system and a cementing agent feeding and metering system; the stirring preparation subsystem consists of a double-horizontal-shaft stirrer and a vertical stirring barrel. By adopting the filling system, the two-stage stirring process of material preparation in advance, accurate metering, forced activation period preparation-storage deviation adjustment continuous discharging can be realized, the mixing proportion of filling materials and the mass concentration of filling slurry can be accurately controlled, the high-concentration homogeneous-like steady-state structural flow filling slurry is prepared, and the preparation quality and the filling cost of the filling slurry are controlled. The system has strong adaptability to mining and filling unbalanced mines, saves construction investment and has short period, and is suitable for filling and building stations of mines of various scales.
Description
Technical Field
The utility model relates to a mine fills technical field, especially relates to a homogenization preparation structure flow filling system is forced to accurate batching of dehydration tailings.
Background
The tailing filling can improve the resource utilization rate, prevent the ground surface from collapsing, reduce the discharge of solid waste to the ground surface, and is an effective way for fully utilizing tailing resources and realizing land conservation, energy conservation, environmental protection and waste utilization, so most underground mines adopt a tailing filling mode.
The tailing filling system mainly comprises a feeding end (namely the feeding end controls the material addition amount), a stirrer device, a measuring pipe (the measuring pipe is arranged at the rear end of the stirrer device and extends into an underground goaf), and the like; the materials entering the stirrer have three types: water (for adjusting concentration), tailing slurry and cement.
The currently adopted technology is mainly as follows: directly connecting corresponding materials with the end part of the stirrer through respective pipelines, respectively installing a metering device and an adjusting device on the corresponding pipelines, directly putting the metered corresponding materials into the stirrer to be uniformly stirred, and controlling and adjusting the addition of the three materials by a feeding end. After the slurry is stirred uniformly, the slurry is fed down to a downhole goaf through a measuring pipe, and a concentration meter is usually arranged on the measuring pipe for detecting the filling concentration. The stirring equipment usually adopts a two-section stirrer for stirring, the first section adopts a double-shaft blade type stirrer (horizontal type), the second section adopts a double-shaft double-helix stirrer (horizontal type), and the mixture is stirred uniformly and then automatically flows to a goaf through an underground pipe network or is pumped into the underground goaf.
On-line flow type (pipeline flowmeter, belt nucleon balance, etc.) metering and concentration monitoring are greatly influenced by material chemical property change and feeding stability, and can not accurately meter and control mixing ratio of filling material and mass concentration of filling slurry. Due to the defects of short homogenization time and poor quality of continuous discharging stirring preparation, transient errors caused by unstable feeding measurement cannot be adjusted, and the ash-sand ratio and mass concentration fluctuation of the filling slurry are large. Slurry intermittent preparation equipment cannot continuously discharge materials and realize continuous slurry conveying, pipe flow conveying cannot be completed, and the pipeline is quickly abraded; air spacer sections can also be formed in the conveying pipeline, and accidents such as pipe explosion, pipe blockage and the like are caused. The bin type tailing thickener has limited underflow concentration and large fluctuation of sand concentration, and is difficult to prepare stable high-concentration filling slurry.
SUMMERY OF THE UTILITY MODEL
The not enough to above-mentioned prior art, the utility model aims at providing a dehydration tailings accurate batching forces homogenization preparation structure to flow filling system.
The utility model discloses realize above-mentioned utility model purpose, the utility model provides a homogenization preparation structure flows filling system is forced to accurate batching of dehydration tailings. The dehydration tailing accurate batching forced homogenizing preparation structure flow filling system consists of a feeding and metering subsystem, a stirring preparation subsystem, a slurry conveying filling subsystem and an automatic control system; the feeding and metering subsystem comprises a dehydrated tailing feeding and metering system, a thickening water feeding and metering system and a cementing agent feeding and metering system;
the dehydration tailing feeding and metering system consists of an aggregate storage hopper, an aggregate hopper type metering scale and a transfer device; a first feeding device is arranged below the aggregate storage hopper, and the dehydrated tailings are conveyed to the aggregate hopper type weighing scale through the first feeding device to measure the batching value; a second feeding device is arranged below the aggregate bucket type weighing scale, and the dehydrated tailings after the weighing in the aggregate bucket type weighing scale is unloaded to the transshipment device through the second feeding device;
the concentrated water adjusting feeding and metering system consists of a high-level water tank, a bucket type water scale and a water feeding pipeline for conveying concentrated water in the high-level water tank to the bucket type water scale;
the cementing agent feeding and metering system comprises a cementing agent bin, a screw feeder arranged at the bottom of the cementing agent bin and a cementing agent bucket type weighing scale; an air nozzle arch breaking device is arranged on the cone of the cementing agent bin body;
the stirring preparation subsystem consists of a double-horizontal-shaft stirrer and a vertical stirring barrel; the bottom or the side of the vertical stirring barrel is provided with a discharge opening capable of adjusting the flow of the filling slurry;
the automatic control system controls the aggregate bucket type weighing scale, the bucket type water scale and the cementing agent bucket type weighing scale, and controls and adjusts the set operation parameters of the filling system.
Preferably, the volume of the vertical stirring barrel is not less than 2 times of the maximum value of the stirring amount of the double horizontal shaft stirrer and the flow rate of the filling slurry for 3 min.
Preferably, the discharge opening on the vertical mixing tank regulates and controls the set filling flow of the filling slurry, so as to control the material level of the filling slurry in the vertical mixing tank to be always in the range of a set high material level and a set low material level, and realize the function of continuous discharging;
the specific regulation and control mode of the continuous discharging process is as follows:
when the material level of the vertical stirring barrel is higher than a set high material level, the double-horizontal-shaft stirrer enters a first-section static forced activation stirring unloading waiting state;
or when the material level of the vertical stirring barrel is lower than the set high material level, the double-horizontal-shaft stirrer enters a first section static forced activation stirring unloading state, the primary filling slurry obtained by forced activation stirring preparation is unloaded into the vertical stirring barrel, and a second section storage offset homogenizing stirring is synchronously carried out to obtain the filling slurry.
Preferably, the water supply pipeline consists of a rough scale pipeline and a fine scale pipeline; the thick scale pipeline is provided with a thick scale valve, and the fine scale pipeline is provided with a fine scale valve for controlling the pipeline to be opened and closed, so that the thick and fine scale metering function of the concentrated water is realized.
Preferably, the rough scale pipeline is a large-diameter large-flow pipeline, and the rough scale valve is a pneumatic butterfly valve; the fine scale pipeline is a small-pipe-diameter small-flow pipeline, and the fine scale valve is a pneumatic angle seat valve; the controller of the rough scale valve is provided with an air throttling silencer;
through the combination use of rough scale pipeline with the smart balance pipeline, carry out the rough and smart balance measurement of accent thick water, the measurement step is as follows:
p1, when the rough scale is used for metering, the rough scale valve and the fine scale valve are opened, and the rough scale pipeline and the fine scale pipeline are opened simultaneously;
p2, after reaching the set value of the coarse scale, closing the coarse scale valve to close the coarse scale pipeline and continue the fine scale metering;
p3, when reaching the adjusting concentration water batching value, close the smart balance valve again for close the smart balance pipeline, enter adjusting concentration water after the measurement and wait to prepare the state of unloading.
Preferably, a spiral arch breaking device is arranged in the aggregate storage hopper and/or a vibration motor auxiliary arch breaking device is arranged outside the aggregate storage hopper; and the spiral arch breaking device and the vibration motor auxiliary arch breaking device are automatically started and stopped according to the feeding flow set value of the first feeding equipment through the automatic control system.
Preferably, the first feeding device includes but is not limited to one of a belt and a vibrating feeder; the transfer equipment includes but is not limited to one of a bucket elevator and a belt conveyor.
Preferably, the first feeding device is used for controlling the feeding flow of the first feeding device by regulating and controlling the running rotating speed, so that the metering function of a rough and fine scale is realized; when the rough scale is used for metering, the first feeding equipment is set to run at a high speed; and when the fine scale is used for metering, the first feeding equipment is set to run at a low speed.
Preferably, the screw feeder is used for controlling the incoming material flow rate of the screw feeder by regulating and controlling the screw rotating speed, so that the metering and feeding functions of the rough and fine scales with high and low operation in sections are realized; when the rough scale is used for metering, the screw feeder runs at a high speed; when the fine scale is used for metering, the screw feeder runs at a low speed, so that the metering precision of the cementing agent bucket type metering scale is improved.
Preferably, the aggregate bucket type weighing scale adopts a static bucket type weighing scale, the dewatering tailing feeding and metering system is provided with a compensation weighing scale function for circular deviation adjustment, and the weight of the compensation weighing scale for the next circular metering is determined according to the discharging condition.
Compared with the prior art, the beneficial effects of the utility model reside in that:
1. adopt the utility model provides a homogenization structure stream filling system is forced in accurate batching of dehydration tailings can realize getting the material ready in advance, accurate measurement, force activation cycle preparation-the filling technology of two segmentation stirring of storage tuningout continuous discharging for accurate control fills material match ratio and fills ground paste mass concentration, prepares the similar homogeneity steady state structure of high concentration and flows and fills the ground paste, control and fills ground paste preparation quality and filling cost.
2. Adopt the utility model provides an accurate batching of dehydration tailings forces homogenization structure to flow filling system, and the dehydration tailings filling ground paste of preparation has solved sand silo and the restriction tailings filling ground paste preparation mass concentration bottleneck problem of storehouse formula thickener sand setting concentration.
3. In the utility model provides an among the accurate batching of dehydration tailings forces homogenization structure stream filling system, the dehydration tailings adopts static bucket type balance measurement, combines thick smart balance control technique, has realized the accurate measurement of dehydration tailings, and the measurement deviation is less than or equal to 0.7%; by adopting the rough and fine weighing technology, the feeding and metering deviation of the cementing agent and the thickening water is less than or equal to 1 percent, the accurate control of the proportion and the mass concentration of the filling materials is realized, and the filling quality and the cost can be effectively controlled.
4. In the dehydrated tailing accurate batching forced homogenizing structural flow filling system provided by the utility model, the aggregate storage hopper adopts a built-in blade type spiral arch breaking device and an external vibrating motor combined arch breaking technology, thereby realizing continuous and balanced feeding; the technical problems of low volume utilization rate, unsmooth feeding and difficult feeding of the dehydrated tailing storage hopper are solved.
5. By adopting the dehydration tailing accurate batching forced homogenizing structural flow filling system provided by the utility model, the technology combining static metering and forced activation period preparation-storage deviation-adjustment continuous discharging two-stage stirring can be realized, and the functions of intermittent accurate metering, forced activation preparation and continuous discharging can be realized and timely adjustment can be realized; the filling process adopting the system can solve the technical prejudices of poor stability, large error and large lag of feedback regulation of on-line flow type continuous metering (such as a pipeline flowmeter, a concentration meter and a belt electronic scale).
6. Adopt the utility model provides a homogenization structure flow filling system is forced in accurate batching of dehydration tailings, can realize continuous production, the adaptation is adopted and is filled unbalanced mine, and the mine that the sand was filled is got in the tailing storehouse.
Drawings
FIG. 1 is the utility model provides a dehydration tailings accurate batching forces homogenization structure flow filling system's schematic structure.
Reference numerals:
1. a feeding and metering subsystem; 11. a dewatering tailing feeding and metering system; 110. an aggregate storage hopper; 111. a spiral arch breaking device; 112. the vibration motor assists the arch breaking device; 113. a first feeding device; 114. an aggregate bucket type weigher; 115. a transshipment facility; 12. a thickening water feeding and metering system; 120. a high-level water tank; 121. a water supply pipe; 122. a bucket type water scale; 13. a cementing agent feeding and metering system; 130. a cementing agent bin; 131. an air nozzle arch breaking device; 132. a screw feeder; 133. a hopper type weigher for cementing agent; 2. a stirring preparation subsystem; 21. a double horizontal shaft mixer; 22 vertical mixing tank; 3. and a slurry conveying and filling subsystem.
Detailed Description
The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, the utility model provides a dehydration tailings accurate batching forced homogenization preparation structure flow filling system. The filling system consists of a feeding and metering subsystem 1, a stirring preparation subsystem 2, a slurry conveying and filling subsystem 3 and an automatic control system; the feeding and metering subsystem 1 comprises a dehydrated tailing feeding and metering system 11, a thickening water feeding and metering system 12 and a cementing agent feeding and metering system 13;
the dehydrated tailing feeding and metering system 11 consists of an aggregate storage hopper 110, an aggregate hopper type metering scale 114 and a transfer device 115; a first feeding device 113 is arranged below the aggregate storage hopper 110, and the dehydrated tailings are conveyed to the aggregate hopper type weighing scale 114 through the first feeding device 113 to measure the batching value; a second feeding device is arranged below the aggregate bucket type weighing scale 114, and the dehydrated tailings which are metered in the aggregate bucket type weighing scale 114 are discharged to the transshipment device 115 through the second feeding device;
the concentrated water feeding and metering system 12 consists of a high-level water tank 120, a bucket water scale 122 and a water supply pipeline 121 for conveying concentrated water in the high-level water tank 120 to the bucket water scale 122;
the cementing agent feeding and metering system 13 comprises a cementing agent bin 130, a screw feeder 132 arranged at the bottom of the cementing agent bin 130 and a cementing agent bucket type weighing scale 133; an air nozzle arch breaking device 131 is arranged on the cone of the cementing agent bin 130;
the stirring preparation subsystem 2 consists of a double-horizontal-shaft stirrer 21 and a vertical stirring barrel 22; a discharge opening capable of adjusting the flow rate of filling slurry is arranged at the bottom or the side of the vertical stirring barrel 22;
the automatic control system controls the aggregate bucket weigher 114, the bucket water weigher 122 and the cementing agent bucket weigher 133, and controls and adjusts the set operation parameters of the filling system.
Further, the volume of the vertical mixer 22 is not less than 2 times the maximum value of the mixing amount of the double horizontal shaft mixer 21 and the flow rate of the slurry for 3 min.
Further, the discharge opening on the vertical mixing drum 22 regulates the set filling flow of the filling slurry, so as to control the material level of the filling slurry in the vertical mixing drum 22 to be always within the range of the set high material level and the set low material level, thereby realizing the function of continuous discharging; the specific regulation and control mode of the continuous discharging process is as follows:
when the material level of the vertical stirring barrel 22 is higher than the set high material level, the double-horizontal-shaft stirrer 21 enters a first-stage static forced activation stirring unloading waiting state;
or, when the material level of the vertical stirring barrel 22 is lower than the set high material level, the double-horizontal-shaft stirrer 21 enters a first-stage static forced activation stirring unloading state, unloads the preliminary filling slurry obtained by forced activation stirring into the vertical stirring barrel 22, and synchronously performs second-stage storage offset homogenizing stirring to obtain the filling slurry.
Further, the water supply pipeline 121 is composed of a rough scale pipeline and a fine scale pipeline; the thick scale pipeline is provided with a thick scale valve, and the fine scale pipeline is provided with a fine scale valve for controlling the pipeline to be opened and closed, so that the thick and fine scale metering function of the concentrated water is realized.
Furthermore, the rough scale pipeline is a large-diameter large-flow pipeline, and the rough scale valve is a pneumatic butterfly valve; the fine scale pipeline is a small-pipe-diameter small-flow pipeline, and the fine scale valve is a pneumatic angle seat valve; the controller of the rough scale valve is provided with an air throttling silencer; through the combination use of rough scale pipeline with the smart balance pipeline, carry out the rough and smart balance measurement of accent thick water, the measurement step is as follows:
p1, when the rough scale is used for metering, the rough scale valve and the fine scale valve are opened, and the rough scale pipeline and the fine scale pipeline are opened simultaneously;
p2, after reaching the set value of the coarse scale, closing the coarse scale valve to close the coarse scale pipeline and continue the fine scale metering;
p3, when reaching the adjusting concentration water batching value, close the smart balance valve again for close the smart balance pipeline, enter adjusting concentration water after the measurement and wait to prepare the state of unloading.
Further, a spiral arch breaking device 111 and/or an external vibration motor auxiliary arch breaking device 112 are/is arranged in the aggregate storage bucket 110; through the automatic control system, the spiral arch breaking device 111 and the vibration motor auxiliary arch breaking device 112 are automatically started and stopped according to a feeding flow set value of the first feeding device 113.
Further, the first feeding device 113 includes, but is not limited to, one of a belt, a vibrating feeder; the transfer device 115 includes, but is not limited to, one of a bucket elevator and a belt conveyor.
Further, the first feeding device 113 is used for controlling the feeding flow of the first feeding device 113 by regulating and controlling the operation rotation speed, so as to realize the metering function of a rough and fine scale; when the rough scale is used for metering, the first feeding device 113 is set to run at a high speed; when the precision weighing is carried out, the first feeding device 113 is set to operate at a low speed.
Further, the screw feeder 132 is used for controlling the incoming material flow rate of the screw feeder 132 by regulating and controlling the screw rotation speed, so as to realize the function of metering and feeding the rough and fine scales by high and low speed operation in sections; when the coarse scale is used for metering, the screw feeder 132 runs at a high speed; when the fine scale is used for metering, the screw feeder 132 is operated at a low speed, so that the metering accuracy of the cementing agent bucket type weighing scale 133 is improved.
Further, the aggregate bucket type weighing scale 114 is a static bucket type weighing scale, the dewatering tailing feeding and metering system 11 is provided with a compensation weighing scale function for circular deviation adjustment, and the weight of the compensation weighing scale for the next circular metering is determined according to the discharging condition.
The present invention is described in further detail below with reference to specific examples.
Example 1
The dehydration tailing accurate batching forced homogenizing preparation structure flow filling system is composed of a feeding and metering subsystem 1, a stirring preparation subsystem 2, a slurry conveying filling subsystem 3 and an automatic control system.
The feeding and metering subsystem 1 comprises a dehydrated tailing feeding and metering system 11, a thickening water feeding and metering system 12 and a cementing agent feeding and metering system 13.
1) The dehydrated tailing feeding and metering system 11 consists of an aggregate storage hopper 110, an aggregate hopper type metering scale 114 and a transfer device 115; a first feeding device 113 is arranged below the aggregate storage hopper 110, and the dehydrated tailings are conveyed to the aggregate hopper type weighing scale 114 through the first feeding device 113 to measure the batching value; a second feeding device is arranged below the aggregate bucket type weighing scale 114, and the dehydrated tailings which are metered in the aggregate bucket type weighing scale 114 are discharged to the transshipment device 115 through the second feeding device.
The aggregate bucket type weighing scale 114 adopts a static bucket type weighing scale, the dehydration tailing feeding and metering system 11 is provided with a compensation weighing scale function for circular deviation adjustment, the weight of the compensation weighing scale for the next circular metering is determined according to the discharging condition, and the long-term accumulated metering precision is improved.
As a further preferred aspect of the present invention, the aggregate storage bucket 110 is internally provided with a spiral arch breaking device 111 and externally provided with a vibration motor auxiliary arch breaking device 112; through the automatic control system, the spiral arch breaking device 111 and the vibration motor auxiliary arch breaking device 112 are automatically started and stopped according to a feeding flow set value of the first feeding device 113.
As a further preferred option of the present solution, the first feeding device 113 is a dosing belt; the transfer device 115 is a bucket elevator.
The dehydrated tailings in the aggregate storage hopper 110 are fed into an aggregate hopper type weighing scale 114 through a batching belt, the width of the batching belt is 800mm, in order to realize accurate metering of the dehydrated tailings, the batching belt is driven by a frequency conversion motor, the function of a rough weighing scale is set, in order to shorten the metering time during the rough weighing scale, the batching belt is set to operate at a high speed of high frequency 50 HZ; for accurate measurement during the accurate balance, the belt sets up to low frequency 10HZ low-speed operation.
When the amount of the dehydrated tailings in the aggregate bucket type weigher 114 reaches the batching amount, the aggregate bucket type weigher enters a waiting state, the bucket type hoister is placed to a receiving position, a hopper of the bucket type hoister is fed by a belt of the aggregate bucket type weigher 114, a hoisting motor is started and stopped by frequency conversion, and the tailings are hoisted to a metering layer of a stirring building by the bucket type hoister to wait for a discharge instruction.
2) The concentrated water feeding and metering system 12 is composed of a high-level water tank 120, a bucket water scale 122 and a water supply pipeline 121 for conveying concentrated water in the high-level water tank 120 to the bucket water scale 122.
The water supply pipeline 121 consists of a rough scale pipeline and a fine scale pipeline; the thick scale pipeline is provided with a thick scale valve, and the fine scale pipeline is provided with a fine scale valve for controlling the pipeline to be opened and closed, so that the thick and fine scale metering function of the concentrated water is realized.
The rough scale pipeline is a large-diameter large-flow pipeline, and the fine scale pipeline is a small-diameter small-flow pipeline; and the coarse scale pipeline and the fine scale pipeline are jointly used for metering the thickening water coarse and fine scales.
As a further aspect of the present solutionPreferably, the concentrated water is introduced from the high-level water pool 120 and the bin capacity is 600m3. The concentrated water is 1.2m3The bucket type water balance is used for metering, and a butterfly valve at the lower part of the water balance is opened during feeding to add the concentrated water into the double-horizontal-shaft stirrer 21. The diameter of the rough scale pipeline is DN100, and a pneumatic butterfly valve controls the pipeline to be opened and closed; the diameter of the fine scale pipeline is DN25, and a pneumatic angle seat valve controls the pipeline switch.
The metering steps are as follows:
p1, when the rough scale is used for metering, the rough scale valve and the fine scale valve are opened, and the rough scale pipeline and the fine scale pipeline are opened simultaneously;
p2, after reaching the set value of the coarse scale, closing the coarse scale valve to close the coarse scale pipeline and continue the fine scale metering;
p3, when reaching the adjusting concentration water batching value, close the smart balance valve again for close the smart balance pipeline, enter adjusting concentration water after the measurement and wait to prepare the state of unloading.
Because the filling water supply pipeline is long and the height difference is large, the butterfly valve controller of the rough balance pipeline is provided with the air outlet throttling silencer to control the closing speed of the valve and prevent the pipeline from generating water hammer.
3) The cementing agent feeding and metering system 13 comprises a cementing agent bin 130, a screw feeder 132 arranged at the bottom of the cementing agent bin 130 and a cementing agent bucket type weighing scale 133; an air nozzle arch breaking device 131 is arranged on the cone of the cementing agent bin 130;
the cementing agent is stored by a cement bin and is matched and connected with a discharging ash blowing pipe of a bulk powder tank truck; a dust remover and a safety valve are arranged at the top of the cement bin; the bottom of the bin is provided with a discharge valve and a screw feeder. The cementing agent is transported to a filling station by a bulk powder tank truck and is transported into a cement bin by an ash blowing pipe, a bin top dust remover is opened when the material is unloaded, the ash blowing pipe is sealed after the material is unloaded, and the dust remover is closed.
The cone of the bin body is provided with an air nozzle arch breaking device, and when the flow rate of continuous incoming materials in a certain period of the cementing agent bucket type weighing scale is less than or equal to a set value, the air nozzle automatically blows once to eliminate arch so as to maintain the feeding speed.
The screw feeder has the feeding function of the rough and fine scales which are operated at high and low speeds in sections, and the rough scales are operated at high speed, so that the metering time is shortened; the operation is performed at low speed during the fine weighing, and the single-bucket metering precision is improved.
And during filling, opening a bin bottom valve, conveying the cementing agent to a cement scale through a screw feeder at the bin bottom, weighing to reach a batching value, and then waiting for preparing and unloading.
As a further optimization of the scheme, the cementing agent bin 130 is a steel structure cement bin with the volume of 100t, and the top of the cement bin is provided with a pedestrian inspection hole, a continuous charge level meter and a pulse back-blowing bag type dust collector. The cement feeding is carried out by using an LSY273 single-tube screw feeder 132, the diameter of a screw shell is 273mm, the conveying distance is about 8m, the equipment power is 11kw, and the cement metering is carried out by using a 0.8m3 bucket type cement metering scale.
When filling, open cement storehouse bottom screw gate, start single tube screw feeder, carry cement to the cement balance and to the batching volume, open pneumatic butterfly valve and rapping device under the cement balance when unloading, cement gravity flow to stirred tank.
The stirring preparation subsystem 2 consists of a double horizontal shaft stirrer 21 and a vertical stirring barrel 22; the bottom or the barrel side of the vertical stirring barrel 22 is provided with a discharge opening capable of adjusting the flow rate of the filling slurry. The volume of the vertical stirring barrel 22 is more than or equal to 2 times of the maximum value of the stirring amount of the double horizontal shaft stirrer 21 and the flow rate of the filling slurry in 3 min.
The discharge opening on the vertical stirring barrel 22 regulates and controls the set filling flow of the filling slurry, so as to control the material level of the filling slurry in the vertical stirring barrel 22 to be always in the range of the set high material level and the set low material level, and realize the function of continuous discharging.
Adopt the utility model provides a preparation technology that stirring preparation subsystem 2 among the filling system carries out the filling ground paste: the preparation of the filling slurry adopts a two-stage stirring process, the two-stage stirring is continuously operated during filling, the first stage of forced activation stirring adopts a double horizontal shaft forced stirrer, and a static forced activation stirring technology is adopted to eliminate tailing and cementing agent dry powder floc to realize homogenization; the second section of storage homogenizing stirring adopts vertical agitator, and the storage function is for reducing the single cycle batching measurement that leads to because of factors such as tailings knot encircles and glutinous glues and unload the not net error, and the homogenization ground paste that also can be further simultaneously improves filling ground paste preparation quality, realizes the continuous ejection of compact of filling system ground paste.
After the aggregate, the cementing agent, the water and other filling materials are completely measured, the aggregate, the cementing agent and other filling materials are all put into a waiting preparation unloading state, and then the aggregate, the water and the cementing agent are unloaded into a forced activation stirrer in sequence. Firstly, discharging water, and forming a water curtain in a forced activation stirrer to achieve the purpose of dust suppression; and (3) after draining begins for a period of time (interval time is adjusted according to experimental observation by taking the formed water curtain as a judgment basis for obvious dust suppression), aggregate and cementing discharging is started, stirring preparation timing is carried out after all discharging is finished, and the aggregate hopper type weighing scale, the cementing agent hopper type weighing scale and the water hopper type weighing scale enter the next cycle of metering. In order to ensure the stirring homogenization time, the forced activation stirring time is set to start timing from the time of complete unloading, and the first-stage stirring unloading waiting state is entered after the stirring is carried out for the set time by taking the dehydration-free tailing clusters and the cementing agent dry powder floccules in the prepared slurry as judgment indexes.
When the material level of the second section of vertical stirring barrel is higher than the set high material level, the first section of forced activation stirring machine enters a slurry unloading waiting state, and the filling material is still in a preparation unloading waiting state. When the material level of the vertical stirring barrel for storing, homogenizing and stirring the second section is lower than the set low material level, the slurry amount discharged by the first section in stirring can be contained, the first section forcibly activates the stirrer to enter a discharging state, the discharging door is closed after the discharging is finished, the vertical stirring barrel enters a feeding waiting state, and when the filling materials in the next cycle are metered and all enter a waiting preparation discharging state, the filling materials are discharged according to the discharging sequence to prepare the filling slurry, and the next preparation cycle is started.
As a further optimization of the scheme, the first section of the forced stirring adopts a JS2000 double horizontal shaft forced stirrer, and the feeding volume is 3m3Discharge volume 2m3The circulation time is less than or equal to 2min, the stirring time after the whole material is unloaded is more than or equal to 45s, and the production capacity is more than or equal to 60m3H is used as the reference value. A pressure pipeline pump is arranged between the water scale and the stirrer to enhance water atomization and water washing effect. A vibration dust collector is arranged for collecting dust and is connected with a bucket type cement scale and a stirrer through a pipeline, and when the discharge of each preparation cycle is started, the dust collector is openedStarting and stopping working after discharging is finished.
The second stage of storing material is homogenized and stirred by adopting a phi 2000 multiplied 2100 vertical high-concentration stirring barrel with the effective volume of 5m3The double-layer blade type stirring shaft is matched, the diameter of the blade is 1000mm, the rotating speed is 100r/min, the material is discharged from the barrel side, the diameter of a discharge port is phi 200mm, and the discharge flow of the stirring barrel is adjusted by a power-driven pinch valve so as to control the liquid level of a pump bucket. The mixing drum is provided with an ultrasonic continuous liquid level meter and an electrode type rod-shaped high liquid level meter, the material level in the mixing drum is monitored, and the opening action of the discharge door of the first-stage mixer is controlled in a feedback mode.
Thirdly), a slurry conveying and filling subsystem: according to the design production capacity and the operation working condition of a filling system, the length of a filling pipeline is about 1.2km, the height difference is-20 m, an HBT8018C-5 concrete trailer pump is selected for slurry conveying, the conveying pressure (low pressure/high pressure) is 10/18MPa, and the conveying flow (low pressure/high pressure) is 87/55m3。
To sum up, the utility model provides a homogenization preparation structure flows filling system is forced in accurate batching of dehydration tailings. The filling system is composed of a feeding and metering subsystem, a stirring preparation subsystem, a slurry conveying and filling subsystem and an automatic control system. The feeding and metering subsystem comprises a dehydrated tailing feeding and metering system, a thickening water feeding and metering system and a cementing agent feeding and metering system; the stirring preparation subsystem consists of a double-horizontal-shaft stirrer and a vertical stirring barrel. By adopting the filling system, the two-stage stirring process of material preparation in advance, accurate metering, forced activation period preparation-material storage deviation adjustment continuous discharging can be realized, the mixing proportion of filling materials and the mass concentration of filling slurry can be accurately controlled, the high-concentration homogeneous-like steady-state structural flow filling slurry is prepared, and the preparation quality and the filling cost of the filling slurry are controlled. The system has strong adaptability to mining and filling unbalanced mines, saves construction investment and has short period, and is suitable for filling and building stations of mines of various scales.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; these modifications and substitutions do not depart from the essence of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a dehydration tailings accurate batching forces homogenization preparation structure to flow filling system which characterized in that: the dehydration tailing accurate batching forced homogenizing preparation structure flow filling system consists of a feeding and metering subsystem (1), a stirring preparation subsystem (2), a slurry conveying filling subsystem (3) and an automatic control system; the feeding and metering subsystem (1) comprises a dehydrated tailing feeding and metering system (11), a thickening water feeding and metering system (12) and a cementing agent feeding and metering system (13);
the dehydrated tailing feeding and metering system (11) consists of an aggregate storage hopper (110), an aggregate hopper type metering scale (114) and a transfer device (115); a first feeding device (113) is arranged below the aggregate storage hopper (110), and the dehydrated tailings are conveyed to the aggregate hopper type weighing scale (114) through the first feeding device (113) to measure the batching value; a second feeding device is arranged below the aggregate bucket type weighing scale (114), and the dehydrated tailings which are metered in the aggregate bucket type weighing scale (114) are discharged to the transshipment device (115) through the second feeding device;
the concentrated water adjusting feeding and metering system (12) consists of a high-level water tank (120), a bucket type water scale (122) and a water supply pipeline (121) for conveying concentrated water in the high-level water tank (120) to the bucket type water scale (122);
the cementing agent feeding and metering system (13) comprises a cementing agent bin (130), a screw feeder (132) arranged at the bottom of the cementing agent bin (130) and a cementing agent bucket type weighing scale (133); an air nozzle arch breaking device (131) is arranged on the cone of the cementing agent bin (130);
the stirring preparation subsystem (2) consists of a double-horizontal-shaft stirrer (21) and a vertical stirring barrel (22); the bottom or the barrel side of the vertical stirring barrel (22) is provided with a discharge opening capable of adjusting the flow of filling slurry;
the automatic control system controls the aggregate bucket type weighing scale (114), the bucket type water scale (122) and the cementing agent bucket type weighing scale (133), and controls and adjusts the set operation parameters of the filling system.
2. The dehydrated tailings accurate blending forced homogenization preparation structure flow filling system of claim 1, wherein: the volume of the vertical stirring barrel (22) is more than or equal to 2 times of the maximum value of the stirring amount of the double horizontal shaft stirrer (21) and the flow rate of the filling slurry in 3 min.
3. The dehydrated tailings accurate blending forced homogenization preparation structure flow filling system of claim 2, wherein: the discharge opening on vertical agitator (22) regulates and control the settlement fill flow of filling ground paste, is used for control in vertical agitator (22) the material level of filling ground paste is in the within range of setting for high material level and setting for low material level all the time, realizes the function of continuous ejection of compact.
4. The dehydrated tailings accurate blending forced homogenization preparation structure flow filling system of claim 1, wherein: the water supply pipeline (121) consists of a rough scale pipeline and a fine scale pipeline; the thick scale pipeline is provided with a thick scale valve, and the fine scale pipeline is provided with a fine scale valve for controlling the pipeline to be opened and closed, so that the thick and fine scale metering function of the concentrated water is realized.
5. The dehydrated tailings accurate blending forced homogenization preparation structure flow filling system of claim 4, wherein: the coarse scale pipeline is a large-diameter large-flow pipeline, and the coarse scale valve is a pneumatic butterfly valve; the fine scale pipeline is a small-pipe-diameter small-flow pipeline, and the fine scale valve is a pneumatic angle seat valve; and an air throttling silencer is arranged on a controller of the rough scale valve.
6. The dehydrated tailings accurate blending forced homogenization preparation structure flow filling system of claim 1, wherein: a spiral arch breaking device (111) is arranged in the aggregate storage hopper (110) and/or a vibration motor auxiliary arch breaking device (112) is arranged outside; through the automatic control system, the spiral arch breaking device (111) and the vibration motor auxiliary arch breaking device (112) are automatically started and stopped according to a feeding flow set value of the first feeding equipment (113).
7. The dehydrated tailings accurate blending forced homogenization preparation structure flow filling system of claim 6, wherein: the first feeding device (113) includes but is not limited to one of a belt and a vibrating feeder; the transfer equipment (115) comprises but is not limited to one of a bucket elevator and a belt conveyor.
8. The dehydrated tailings accurate blending forced homogenization preparation structure flow filling system of claim 7, wherein: the first feeding equipment (113) is used for controlling the feeding flow of the first feeding equipment (113) by regulating and controlling the running rotating speed, so that the metering function of a rough and fine scale is realized; when the rough scale is used for metering, the first feeding device (113) is set to run at a high speed; when the fine scale is used for metering, the first feeding device (113) is set to run at a low speed.
9. The dehydrated tailings accurate blending forced homogenization preparation structure flow filling system of claim 1, wherein: the screw feeder (132) is used for controlling the incoming material flow rate of the screw feeder (132) by regulating and controlling the screw rotating speed, so that the metering and feeding functions of the rough and fine scales with high and low operation in sections are realized; when the coarse scale is used for metering, the screw feeder (132) runs at a high speed; when the precise scale is used for metering, the screw feeder (132) runs at a low speed, so that the metering precision of the cementing agent bucket type metering scale (133) is improved.
10. The dehydrated tailings accurate blending forced homogenization preparation structure flow filling system of claim 1, wherein: the aggregate bucket type weighing scale (114) adopts a static bucket type weighing scale, the dehydration tailing feeding and metering system (11) is provided with a compensation balance function to carry out circular deviation adjustment, and the weight of the compensation balance for the next circular metering is determined according to the discharging condition.
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| CN202020288351.8U CN212105950U (en) | 2020-03-10 | 2020-03-10 | Dehydration tailing accurate batching forced homogenization preparation structure flow filling system |
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