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CN113202551A - System and method for accurately preparing and filling coarse aggregate and tail mortar - Google Patents

System and method for accurately preparing and filling coarse aggregate and tail mortar Download PDF

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Publication number
CN113202551A
CN113202551A CN202110550612.8A CN202110550612A CN113202551A CN 113202551 A CN113202551 A CN 113202551A CN 202110550612 A CN202110550612 A CN 202110550612A CN 113202551 A CN113202551 A CN 113202551A
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China
Prior art keywords
metering
filling
coarse aggregate
preparation
cement
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CN202110550612.8A
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Chinese (zh)
Inventor
郑伯坤
尹旭岩
张宝
尹贤刚
彭亮
仵锋锋
黄腾龙
赖伟
盛佳
邓高岭
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Changsha Institute of Mining Research Co Ltd
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Changsha Institute of Mining Research Co Ltd
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Priority to CN202110550612.8A priority Critical patent/CN113202551A/en
Publication of CN113202551A publication Critical patent/CN113202551A/en
Pending legal-status Critical Current

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    • 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
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/12—Waste materials; Refuse from quarries, mining or the like
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • 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
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Ceramic Engineering (AREA)
  • Organic Chemistry (AREA)
  • Geology (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Civil Engineering (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)

Abstract

The invention provides a system and a method for accurately preparing and filling coarse aggregate and tail mortar. The system comprises a tail mortar concentration storage and metering system, a coarse aggregate metering and feeding system, a cement metering and feeding system, a concentration adjusting water metering and feeding system, a filling slurry preparation system and an automatic control system, wherein the filling slurry preparation system and the automatic control system are respectively connected with the systems. The method adopts a static metering-periodic preparation circulating process, and can realize accurate metering of each filling material; the stirring time of the stirrer can be set at will, so that the filling material is fully stirred, and the high-quality preparation of the filling slurry is guaranteed; the technical defects of poor filling slurry preparation quality, poor slurry pipeline conveying reliability, high filling cost and the like caused by low filling material metering precision, large error, large sand discharge concentration fluctuation of tailing thickening equipment and the like in the conventional coarse aggregate cemented filling process in the prior art are effectively overcome.

Description

System and method for accurately preparing and filling coarse aggregate and tail mortar
Technical Field
The invention relates to the technical field of mine solid waste filling, in particular to a system and a method for accurately preparing and filling coarse aggregate and tail mortar.
Background
The filling body prepared by the coarse aggregate cemented filling system has higher compressive strength and is widely applied to underground mines with broken ore rocks.
However, at present, a conventional mine cemented and filled with coarse aggregate generally adopts a continuous preparation process, and the coarse aggregate (such as crushed gravel, gobi aggregate, filter-pressed tailings and the like) has different water content changes, self viscosity, grain size composition and the like due to storage time, so that the quality and the property of the coarse aggregate are unstable, the problems of material blockage, material adhesion and the like exist in the links of unloading, metering, conveying and the like, the concentration fluctuation of the filling slurry is large, the preparation quality is poor, and the reliable conveying of the slurry, the strength of an underground filling body and the like are directly influenced. Besides aggregate, the cementing material also has the problem of arching, so that the feeding amount cannot be reliably controlled in the continuous preparation process of slurry. The fluctuating filling concentration will affect the preparation effect of the filling slurry and the strength of the underground filling body, and many mines often have to adopt higher sand-lime ratio to obtain higher strength of the filling body in order to ensure the operation safety, thereby increasing the filling cost and increasing the burden of enterprises. For the mine with long-distance conveying of filling slurry, accurate high-quality preparation of the filling slurry is required to be ensured so as to ensure reliable conveying of the slurry and avoid pipe blockage accidents.
In addition, the traditional mine adopting tailing thickening equipment such as a sand silo or a deep cone thickener also gradually reduces the sand discharge concentration along with the reduction of the sand surface in the silo, which greatly influences the filling quality. In the mine which is partially cemented and filled by the coarse aggregate, tailings produced by a dressing plant are not added in the preparation of filling slurry, and in order to ensure that the coarse aggregate filling slurry has good conveying characteristics, the using amount of cementing materials (such as cement, fly ash and the like) is increased frequently so as to ensure the reasonability of the particle size distribution of the filling materials. Because the cost of the cementing material is higher, the filling cost is greatly increased, and the mill tailings can not be reasonably recycled.
The invention patent with publication number CN108915765A provides a filling system and a filling method for underground full tailings-waste stone paste. The filling system is built and operated in an underground chamber or an underground roadway; the filling system comprises a paste thickener, a cement bin, a horizontal sand bin, an overflow water bin, a stirrer and a filling delivery pump which are arranged underground; the system also comprises a cement transfer bin arranged on the ground surface and used for temporarily storing cement and a factory for producing low-concentration full-tail mortar. Conveying the low-concentration full-tailing slurry produced by the plant selection to the paste thickener for tailing dehydration through a tailing conveying drill hole arranged on the ground surface to prepare high-concentration full-tailing slurry; the horizontal sand silo and the overflow water silo are both connected with the paste thickener, the horizontal sand silo is used for accident treatment slurry, and the overflow water silo is used for storing clarified overflow water of the paste thickener; and cement in the cement transfer bin is conveyed to the underground cement bin through a cement conveying drill hole arranged on the ground surface. However, the filling system has the technical defects that accurate measurement cannot be carried out, the metering accuracy is poor, and the system is difficult to maintain and detect when being arranged underground.
In view of the above, there is a need to design an improved system and method for accurately preparing and filling coarse aggregate in cooperation with tail mortar to solve the above problems.
Disclosure of Invention
The invention aims to provide a system and a method for accurately preparing and filling coarse aggregate and tail mortar.
In order to realize the aim, the invention provides a coarse aggregate and tail mortar cooperated accurate preparation and filling system, which comprises a tail mortar concentration storage and metering system, a coarse aggregate metering and feeding system, a cement metering and feeding system, a thickening water metering and feeding system, a filling slurry preparation system and an automatic control system, wherein the filling slurry preparation system and the automatic control system are respectively connected with the systems;
the tail mortar thickening storage and metering system comprises a paste storage thickener, an underflow metering buffer hopper and an underflow conveying pipeline, wherein two ends of the underflow conveying pipeline are respectively connected with the paste storage thickener and the underflow metering buffer hopper; the paste storage thickener comprises a step valve arranged at the upper part of the paste storage thickener and a homogenization slurry making device arranged at the bottom of the paste storage thickener;
the control system is respectively and electrically connected with the tail mortar dense storage and metering system, the coarse aggregate metering and feeding system, the cement metering and feeding system, the thickening water metering and feeding system and the filling slurry preparation system.
As a further improvement of the invention, the tail mortar concentration storage and metering system further comprises a first regulating valve, a first electromagnetic flow meter and a concentration meter which are arranged on the underflow conveying pipeline.
As a further improvement of the invention, the tail mortar dense storage and metering system further comprises an air compressor connected with the paste storage thickener and a self-diluting flocculation sedimentation feeding barrel arranged at the top of the paste storage thickener.
As a further improvement of the invention, the tail mortar dense storage and metering system further comprises a slurry pump connected with the underflow conveying pipeline; the slurry pump is electrically connected with the automatic control system.
As a further improvement of the invention, the coarse aggregate metering and feeding system comprises a batching machine, a conveying belt and a coarse aggregate metering buffer hopper which are sequentially communicated.
As a further improvement of the invention, the cement metering and feeding system comprises a cement bin for storing cement, a screw conveyor connected with the bottom of the cement bin and a cement metering buffer hopper arranged above the filling slurry preparation system.
As a further improvement of the invention, the concentrated water metering and feeding system comprises a high-level water tank for storing concentrated water, a concentrated water metering and caching hopper and a concentrated water conveying pipeline, wherein two ends of the concentrated water conveying pipeline are respectively connected with the high-level water tank and the concentrated water metering and caching hopper;
and a second regulating valve and a second electromagnetic flowmeter which are respectively and electrically connected with the automatic control system are arranged on the concentrated water regulating and conveying pipeline.
As a further improvement of the present invention, the filling slurry preparation system is a horizontal forced mixer.
As a further improvement of the invention, the underflow metering buffer hopper comprises a weighing sensor arranged in the underflow metering buffer hopper and a discharge valve arranged at the bottom of the underflow metering buffer hopper; the weighing sensor and the discharge valve are respectively electrically connected with the automatic control system.
In order to achieve the purpose, the invention also provides a filling slurry preparation and filling method, the coarse aggregate and the tail mortar are adopted to accurately prepare the filling system for preparation, a static metering-periodic preparation cyclic process is adopted, and the method comprises the following steps:
s1, preparing tail mortar: a tail mortar thickening storage and metering system is adopted, the tail sand is conveyed to a paste storage thickener for concentration after being settled by a self-diluting flocculation sedimentation feeding barrel, and an air compressor is opened before filling to carry out full-bin slurry making; when filling is needed, under the action of a slurry pump, the underflow is pumped into an underflow metering buffer hopper arranged at the upper part of the horizontal forced mixer through an underflow conveying pipeline; setting the required underflow amount for preparing a period through an automatic control system, and automatically closing a slurry pump by the automatic control system when the underflow amount reaches a set value during filling operation, stopping feeding, and finishing the metering of the underflow; the weighed tail mortar is temporarily stored in an underflow metering buffer hopper, and is automatically discharged into a horizontal forced mixer when the subsequent filling slurry preparation process is carried out;
s2, coarse aggregate metering and feeding: a coarse aggregate metering and feeding system is adopted, and coarse aggregates prepared by a proportioning machine are conveyed into a coarse aggregate metering buffer hopper positioned at the upper part of a horizontal forced mixer through a conveying belt; setting the amount of coarse aggregate required by preparation in one period through an automatic control system, and automatically closing a proportioning machine by the automatic control system when the weight of the coarse aggregate reaches a set value during filling operation, stopping feeding and finishing the metering of the coarse aggregate; the weighed coarse aggregate is temporarily stored in a coarse aggregate metering buffer hopper, and is automatically discharged into a horizontal forced mixer when the subsequent filling slurry preparation process is carried out;
s3, cement metering and feeding: a cement metering and feeding system is adopted to convey cement stored in a cement bin into a cement metering buffer hopper positioned at the upper part of the horizontal forced mixer through a screw conveyor at the bottom of the bin; setting the weight of cement required by preparation in one period through an automatic control system, and automatically closing a screw conveyor by the automatic control system when the weight of the cement reaches a set value during filling operation, stopping feeding and finishing the metering of the cement; temporarily storing the weighed cement in a cement metering buffer hopper, and automatically discharging the cement into a horizontal forced mixer when the subsequent filling slurry preparation process is carried out;
s4, metering and feeding of concentrated water: the concentrated water stored in the high-level water tank is automatically conveyed into a concentrated water metering buffer hopper positioned at the upper part of the horizontal forced mixer through a concentrated water conveying pipeline and a second regulating valve by adopting a concentrated water metering and feeding system; setting the weight of the concentrated water required by preparation in one period through an automatic control system, and automatically closing a second regulating valve by the automatic control system when the weight of the concentrated water reaches a set value during filling operation, stopping water inflow and finishing the metering of the concentrated water; the weighed thickening water is temporarily stored in a thickening water metering buffer hopper, and is automatically discharged into a horizontal forced mixer when the subsequent filling slurry preparation process is carried out;
s5, preparing filling slurry: the automatic control system starts a filling slurry preparation system, the measured tail mortar, coarse aggregate, cement and thickening water are automatically discharged into a horizontal forced mixer, the horizontal forced mixer prepares the filling slurry, and meanwhile, a tail mortar thickening storage and measurement system, a coarse aggregate measuring and feeding system, a cement measuring and feeding system and a thickening water measuring and feeding system respectively perform a circulating process step of measuring and caching the filling material; after the horizontal forced mixer completes preparation and discharging of the filling slurry in one period, automatically closing a filling slurry discharging valve arranged at the bottom of the horizontal forced mixer through an automatic control system;
then the automatic control system respectively opens the discharge valves on the underflow metering buffer hopper, the coarse aggregate metering buffer hopper, the cement metering buffer hopper and the thickening water metering buffer hopper, the filling material is automatically discharged into the horizontal forced mixer through the discharge valves, the horizontal forced mixer carries out the mixing treatment of the next period and automatically discharges the filling slurry; under the regulation and control of an automatic control system, the metering buffer hoppers continuously and circularly measure and buffer the filling materials.
The invention has the beneficial effects that:
1. according to the method for accurately preparing and filling the coarse aggregate and the tail mortar, the accurate metering of each filling material can be realized by adopting a static metering-periodic preparation circulation process; the stirring time of the stirrer can be set at will, so that the filling material is fully stirred, and the high-quality preparation of the filling slurry is guaranteed; the technical defects of poor filling slurry preparation quality, poor slurry pipeline conveying reliability, high filling cost and the like caused by low filling material metering precision, large error, large sand discharge concentration fluctuation of tailing thickening equipment and the like in the conventional coarse aggregate cemented filling process in the prior art are effectively overcome.
2. The coarse aggregate and the tailing mortar are cooperatively filled, so that the strength of a filling body is improved while the coarse aggregate and the tailing are recycled, and the problem of safe mining of broken ore deposits is solved.
3. According to the coarse aggregate and tail mortar coordinated precise preparation filling system, the step valve is arranged at the upper part of the paste storage thickener, and the step valve is opened to discharge upper clear water before sand discharge, so that the sand discharge concentration can be further improved; in addition, a homogenizing and slurry-making device is arranged at the bottom of the paste storage thickener, an air compressor is started to make slurry in the whole bin, the tail mortar concentration in the bin is homogenized, the sand discharge concentration is ensured not to fluctuate, and the preparation of the cemented filling slurry is ensured.
4. According to the coarse aggregate and tail mortar coordinated precise preparation filling system, the metering and cache feeding processes of all filling material subsystems are efficient and precise through precise regulation and control of the automatic control system, a full-automatic periodic preparation circulating process can be realized, the labor cost is saved, and the metering precision is ensured.
Drawings
FIG. 1 is a frame diagram of a coarse aggregate and tail mortar precise preparation and filling system provided by the invention.
Reference numerals
100-coarse aggregate is cooperated with tail mortar to prepare a filling system accurately; 10-a tail mortar dense storage and metering system; 11-paste storage thickener; 12-an underflow transport conduit; 13-underflow metering buffer hopper; 14-a first regulating valve; 15-a first electromagnetic flow meter; 16-concentration meter; 17-an air compressor; 18-slurry pump; 19-self-diluting flocculating settling feed barrel; 20-coarse aggregate metering and feeding system; 21-a dosing machine; 22-a conveyor belt; 23-coarse aggregate metering buffer hopper; 30-cement metering and feeding system; 31-a cement silo; 32-a screw conveyor; 33-cement metering buffer hopper; 40-a concentrated water adjusting metering feeding system; 41-high water pool; 42-a concentrated water delivery pipeline; 43-concentrated water metering buffer hopper; 44-a second regulating valve; 45-a second electromagnetic flow meter; 50-a filling slurry preparation system; and 60, an automatic control system.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the aspects of the present invention are shown in the drawings, and other details not closely related to the present invention are omitted.
In addition, it is also to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Referring to fig. 1, the present invention provides a coarse aggregate and tail mortar coordinated precise preparation and filling system 100, which includes a tail mortar dense storage and metering system 10, a coarse aggregate metering and feeding system 20, a cement metering and feeding system 30, a thickening water metering and feeding system 40, a filling slurry preparation system 50 and an automatic control system 60 respectively connected to the above systems.
The tail mortar thickening storage and metering system 10 comprises a paste body storage thickener 11, an underflow metering buffer hopper 13, an underflow conveying pipeline 12, an air compressor 17, a self-diluting flocculation sedimentation feeding barrel 19, a slurry pump 18 and a first regulating valve 14, a first electromagnetic flow meter 15 and a concentration meter 16, wherein two ends of the underflow conveying pipeline 12 are respectively connected with the paste body storage thickener 11 and the underflow metering buffer hopper 13, the air compressor 17 is connected with the paste body storage thickener 11, the self-diluting flocculation sedimentation feeding barrel 19 is arranged at the top of the paste body storage thickener 11, the slurry pump 18 is connected with the underflow conveying pipeline 12, and the first regulating valve 14, the first electromagnetic flow meter 15 and the concentration meter 16 are sequentially arranged on the underflow conveying pipeline 12.
In the present embodiment, the paste storage thickener 11 includes a step valve 111 disposed at an upper portion thereof and a homogenizing and slurry making device 112 disposed at a bottom portion thereof. The step valve 111 is structurally arranged, and before sand discharging, the step valve is opened to discharge clear water at the upper part, so that the sand discharging concentration can be further improved; in addition, the homogenizing and slurry-making device 112 at the bottom of the paste storage thickener is used for starting the air compressor to make slurry in the whole bin, so that the tail mortar concentration in the bin is homogenized, the sand discharge concentration is ensured not to fluctuate, and the preparation of the cemented filling slurry is ensured.
The slurry pump 18 is electrically connected to the automatic control system 60. The underflow metering buffer hopper 13 comprises a weighing sensor (not marked in the figure) arranged in the underflow metering buffer hopper and a discharge valve (not marked in the figure) arranged at the bottom of the underflow metering buffer hopper, and has the functions of metering and buffering; the weighing sensor and the discharge valve are electrically connected with the automatic control system 60 respectively.
Referring to fig. 1, the coarse aggregate metering and feeding system 20 includes a batching machine 21, a conveying belt 22 and a coarse aggregate metering buffer hopper 23 which are sequentially connected.
The coarse aggregate metering buffer hopper 23 comprises a coarse aggregate weighing sensor (not marked in the figure) arranged in the coarse aggregate metering buffer hopper and a coarse aggregate discharging valve (not marked in the figure) arranged at the bottom of the coarse aggregate weighing sensor, and has the functions of metering and buffering; the coarse aggregate weighing sensor and the coarse aggregate discharge valve are respectively electrically connected with the automatic control system 60.
The cement metering and feeding system 30 comprises a cement bin 31 for storing cement, a screw conveyor 32 connected with the bottom of the cement bin 31, and a cement metering buffer hopper 33 arranged above the filling slurry preparation system 50.
The cement metering buffer hopper 33 comprises a cement weighing sensor (not marked in the figure) arranged in the cement metering buffer hopper and a cement discharging valve (not marked in the figure) arranged at the bottom of the cement metering buffer hopper, and has the functions of metering and buffering; the cement weighing sensor and the cement discharging valve are respectively electrically connected with the automatic control system 60.
The concentrated water metering and feeding system 40 comprises a high-level water tank 41 for storing concentrated water, a concentrated water metering and caching hopper 43 and a concentrated water conveying pipeline 42, wherein two ends of the concentrated water conveying pipeline 42 are respectively connected with the high-level water tank 41 and the concentrated water metering and caching hopper 43; and a second regulating valve 44 and a second electromagnetic flow meter 45 which are respectively and electrically connected with the automatic control system 60 are arranged on the concentrated water regulating and conveying pipeline 42, so that the control and monitoring of the amount of concentrated water are realized.
The concentrated water metering buffer hopper 43 comprises a concentrated water weighing sensor (not marked in the figure) arranged in the concentrated water metering buffer hopper and a concentrated water discharging valve (not marked in the figure) arranged at the bottom of the concentrated water metering buffer hopper, and has the functions of metering and buffering; the concentrated water adjusting weighing sensor and the concentrated water adjusting discharge valve are respectively electrically connected with the automatic control system 60.
The filling slurry preparation system 50 is a horizontal forced mixer.
In the present embodiment, the control system 60 is electrically connected to the tail mortar concentration storage and metering system 10, the coarse aggregate metering and feeding system 20, the cement metering and feeding system 30, the thickening water metering and feeding system 40, and the filling slurry preparation system 50, respectively.
Example 1
The invention provides a filling slurry preparation filling method, which adopts the coarse aggregate and tail mortar cooperated precise preparation filling system for preparation, adopts a static metering-periodic preparation circulation process, and comprises the following steps:
s1, preparing tail mortar: a tail mortar thickening storage and metering system 10 is adopted, after tailing is settled through a self-diluting flocculation settlement feeding barrel 19, the tailing is conveyed to a paste storage thickener 11 for concentration, an air compressor 17 is opened before filling for full-warehouse slurry making, the homogeneity of slurry filled in a warehouse is ensured, and the concentration is unchanged during sand discharging. When filling is needed, under the action of a slurry pump 18, the underflow is pumped into an underflow metering buffer hopper 13 arranged at the upper part of the horizontal forced mixer through an underflow conveying pipeline 12; the underflow metering buffer hopper 13 is provided with a weighing sensor, the bottom of the underflow metering buffer hopper is provided with a discharge valve, and the underflow metering buffer hopper has the functions of metering and buffer storage. The underflow conveying pipeline 12 is provided with a first regulating valve 14, a first electromagnetic flow meter 15 and a concentration meter 16, so that the underflow flow control and concentration monitoring of the paste storage thickener 11 are realized.
The required underflow amount is prepared in one period through the automatic control system 60, during filling operation, the underflow enters the underflow metering buffer hopper 13 through the underflow pump 18 and the underflow conveying pipeline 12, the weighing sensor monitors the underflow weight in the hopper in real time, when the underflow amount reaches a set value, the automatic control system 60 automatically closes the underflow pump 18, feeding is stopped, and underflow metering is completed.
The weighed tail mortar is temporarily stored in the underflow metering buffer hopper 13 and is automatically discharged into the horizontal forced mixer when the subsequent filling slurry preparation process is carried out.
S2, coarse aggregate metering and feeding: adopting a coarse aggregate metering and feeding system 20, conveying the coarse aggregates prepared by a proportioning machine 21 into a coarse aggregate metering buffer hopper 23 positioned at the upper part of a horizontal forced mixer through a conveying belt 22; the coarse aggregate metering buffer hopper 23 is provided with a weighing sensor, the bottom of the coarse aggregate metering buffer hopper is provided with an unloading valve, and the coarse aggregate metering buffer hopper has the functions of metering and buffering.
Setting the amount of coarse aggregate required by preparation in one period through the automatic control system 60, feeding the coarse aggregate into the coarse aggregate metering buffer hopper 23 through the batching machine 21 and the conveying belt 22 during filling operation, monitoring the weight of the coarse aggregate in the hopper in real time by a weighing sensor, and automatically closing the batching machine 21 by the automatic control system 60 when the weight of the coarse aggregate reaches a set value, stopping feeding and finishing metering of the coarse aggregate; the weighed coarse aggregate is temporarily stored in the coarse aggregate metering buffer hopper 23, and is automatically discharged into the horizontal forced mixer when the subsequent filling slurry preparation process is carried out.
S3, cement metering and feeding: a cement metering and feeding system 30 is adopted to convey cement stored in a cement bin 31 into a cement metering buffer hopper 33 positioned at the upper part of the horizontal forced mixer through a screw conveyor 32 at the bottom of the bin; be equipped with weighing sensor on the cement measurement buffer memory fill 33, the bottom is equipped with the valve of unloading, has the effect of measurement and buffer memory concurrently.
Setting a cement weight required by preparation in one period through the automatic control system 60, enabling cement to enter the cement metering buffer hopper 33 through the screw conveyor 32 during filling operation, monitoring the weight of the cement in the hopper in real time by a weighing sensor, and automatically closing the screw conveyor 32 by the automatic control system 60 when the weight of the cement reaches a set value, stopping feeding, and metering the cement; the weighed cement is temporarily stored in the cement metering buffer hopper 33, and is automatically discharged into the horizontal forced mixer when the subsequent filling slurry preparation process is carried out.
S4, metering and feeding of concentrated water: the concentrated water metering and feeding system 40 is adopted to automatically convey the concentrated water stored in the high-level water tank 41 to a concentrated water metering buffer hopper 43 positioned at the upper part of the horizontal forced mixer through a concentrated water conveying pipeline 42 and a second regulating valve 44; and a second regulating valve 44 and a second electromagnetic flowmeter 45 are arranged on the concentrated water conveying pipeline 42, so that the control and monitoring of the amount of concentrated water are realized. The concentrated water metering buffer hopper 43 is provided with a weighing sensor, the bottom of the concentrated water metering buffer hopper is provided with a discharge valve, and the concentrated water metering buffer hopper has the functions of metering and buffer storage.
Setting the weight of the concentrated water required by preparation in one period through the automatic control system 60, feeding the concentrated water into the concentrated water metering buffer hopper 43 through the concentrated water conveying pipeline 42 during filling operation, monitoring the weight of the concentrated water in the hopper in real time by a weighing sensor, and automatically closing the second regulating valve 44 by the automatic control system 60 when the weight of the concentrated water reaches a set value, stopping water feeding and finishing metering of the concentrated water; the weighed thickening water is temporarily stored in a thickening water metering buffer hopper 43, and is automatically discharged into a horizontal forced mixer when the subsequent filling slurry preparation process is carried out;
s5, preparing filling slurry: the automatic control system 60 starts the filling slurry preparation system 50, the measured tail mortar, coarse aggregate, cement and thickening water are automatically discharged into the horizontal forced mixer, the horizontal forced mixer prepares the filling slurry, and meanwhile, the tail mortar thickening storage and measurement system 10, the coarse aggregate measuring and feeding system 20, the cement measuring and feeding system 30 and the thickening water measuring and feeding system 40 respectively perform the circulating process steps of measuring and caching the filling material; after the horizontal forced mixer completes preparation and discharging of the filling slurry for one period, a filling slurry discharging valve arranged at the bottom of the horizontal forced mixer is automatically closed through an automatic control system 60;
then the automatic control system 60 respectively opens the discharge valves on the underflow metering buffer hopper 13, the coarse aggregate metering buffer hopper 23, the cement metering buffer hopper 33 and the thickening water metering buffer hopper 43, the filling material is automatically discharged into the horizontal forced mixer through the discharge valves, the horizontal forced mixer is used for carrying out the next period of mixing treatment, and the filling slurry is automatically discharged; under the control of the automatic control system 60, the metering buffer hoppers continuously and circularly measure and buffer the filling materials.
The preparation process can ensure the accurate metering of the filling material and the high-quality preparation of the filling slurry.
In conclusion, the invention provides a system and a method for accurately preparing and filling coarse aggregate and tail mortar. The system comprises a tail mortar concentration storage and metering system, a coarse aggregate metering and feeding system, a cement metering and feeding system, a concentration adjusting water metering and feeding system, a filling slurry preparation system and an automatic control system, wherein the filling slurry preparation system and the automatic control system are respectively connected with the systems. The method adopts a static metering-periodic preparation circulating process, and can realize accurate metering of each filling material; the stirring time of the stirrer can be set at will, so that the filling material is fully stirred, and the high-quality preparation of the filling slurry is guaranteed; the technical defects of poor filling slurry preparation quality, poor slurry pipeline conveying reliability, high filling cost and the like caused by low filling material metering precision, large error, large sand discharge concentration fluctuation of tailing thickening equipment and the like in the conventional coarse aggregate cemented filling process in the prior art are effectively overcome.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.

Claims (10)

1.一种粗骨料协同尾砂浆精准制备充填系统，其特征在于：所述粗骨料协同尾砂浆精准制备充填系统(100)包括尾砂浆浓密存储和计量系统(10)、粗骨料计量给料系统(20)、水泥计量给料系统(30)、调浓水计量给料系统(40)、分别与前述各系统连接的充填料浆制备系统(50)以及自动控制系统(60)；1. A system for precise preparation and filling of coarse aggregates in coordination with tailings mortar, characterized in that: the system (100) for precise preparation and filling of coarse aggregates in coordination with tailings mortar comprises tailings mortar dense storage and metering system (10), coarse aggregate measurement A feeding system (20), a cement metering and feeding system (30), a concentrated water metering and feeding system (40), a filling slurry preparation system (50) and an automatic control system (60) respectively connected to the aforementioned systems; 所述尾砂浆浓密存储和计量系统(10)包括膏体仓储浓密机(11)、底流计量缓存斗(13)以及两端分别与所述膏体仓储浓密机(11)和底流计量缓存斗(13)连接的底流输送管道(12)；所述膏体仓储浓密机(11)包括设置于其上部的阶梯阀(111)和设置于其底部的均质化造浆装置(112)；The tailings slurry thickening storage and metering system (10) includes a paste storage thickener (11), an underflow metering buffer bucket (13), and two ends are respectively connected to the paste storage thickener (11) and the underflow metering buffer bucket (11). 13) a connected underflow conveying pipeline (12); the paste storage thickener (11) comprises a stepped valve (111) arranged at the upper part thereof and a homogenizing pulping device (112) arranged at the bottom thereof; 所述控制系统(60)分别与所述尾砂浆浓密存储和计量系统(10)、所述粗骨料计量给料系统(20)、所述水泥计量给料系统(30)、所述调浓水计量给料系统(40)、所述充填料浆制备系统(50)电性连接。The control system (60) is respectively connected with the tailings slurry dense storage and metering system (10), the coarse aggregate metering and feeding system (20), the cement metering and feeding system (30), the The water metering and feeding system (40) and the filling slurry preparation system (50) are electrically connected. 2.根据权利要求1所述的粗骨料协同尾砂浆精准制备充填系统，其特征在于：所述尾砂浆浓密存储和计量系统(10)还包括设置于所述底流输送管道(12)上的第一调节阀(14)、第一电磁流量计(15)和浓度计(16)。2. The coarse aggregate-coordinated tailings mortar precise preparation and filling system according to claim 1, characterized in that: the tailings mortar dense storage and metering system (10) further comprises a A first regulating valve (14), a first electromagnetic flowmeter (15) and a concentration meter (16). 3.根据权利要求1所述的粗骨料协同尾砂浆精准制备充填系统，其特征在于：所述尾砂浆浓密存储和计量系统(10)还包括与所述膏体仓储浓密机(11)连接的空压机(17)和设置于所述膏体仓储浓密机(11)顶部的自稀释絮凝沉降给料桶(19)。3. The system for precise preparation and filling of tailings mortar in coordination with coarse aggregate according to claim 1, characterized in that: the tailings mortar dense storage and metering system (10) further comprises a connection with the paste storage thickener (11) The air compressor (17) and the self-diluting flocculation sedimentation feeding bucket (19) arranged on the top of the paste storage thickener (11). 4.根据权利要求1所述的粗骨料协同尾砂浆精准制备充填系统，其特征在于：所述尾砂浆浓密存储和计量系统(10)还包括与所述底流输送管道(12)连接的渣浆泵(18)；所述渣浆泵(18)与所述自动控制系统(60)电性连接。4. The system for precise preparation and filling of tailings mortar in coordination with coarse aggregates according to claim 1, wherein the tailings mortar dense storage and metering system (10) further comprises a slag connected to the underflow conveying pipeline (12). A slurry pump (18); the slurry pump (18) is electrically connected with the automatic control system (60). 5.根据权利要求1所述的粗骨料协同尾砂浆精准制备充填系统，其特征在于：所述粗骨料计量给料系统(20)包括依次连通的配料机(21)、输送皮带(22)和粗骨料计量缓存斗(23)。5. The system for accurately preparing and filling tailings mortar with coarse aggregate according to claim 1, characterized in that: the coarse aggregate metering and feeding system (20) comprises a batching machine (21), a conveying belt (22) that are communicated in sequence ) and the coarse aggregate metering buffer bucket (23). 6.根据权利要求1所述的粗骨料协同尾砂浆精准制备充填系统，其特征在于：所述水泥计量给料系统(30)包括用于存储水泥的水泥仓(31)、与所述水泥仓(31)底部连接的螺旋输送机(32)以及设置于所述所述充填料浆制备系统(50)上方的水泥计量缓存斗(33)。6. The system for accurately preparing and filling tailings mortar with coarse aggregates according to claim 1, characterized in that: the cement metering and feeding system (30) comprises a cement silo (31) for storing cement, a cement silo (31) for storing cement, and a A screw conveyor (32) connected to the bottom of the bin (31) and a cement metering storage bucket (33) arranged above the filling slurry preparation system (50). 7.根据权利要求1所述的粗骨料协同尾砂浆精准制备充填系统，其特征在于：所述调浓水计量给料系统(40)包括用于存储调浓水的高位水池(41)、调浓水计量缓存斗(43)以及两端分别与所述高位水池(41)和调浓水计量缓存斗(43)连接的调浓水输送管道(42)；7. The system for precise preparation and filling of coarse aggregate and tailings mortar according to claim 1, characterized in that: the concentration-adjusted water metering and feeding system (40) comprises a high-level pool (41) for storing the concentration-adjusted water, a concentration-adjusting water metering buffer bucket (43) and a concentration-adjusting water conveying pipeline (42) whose ends are respectively connected with the high-level water pool (41) and the concentration-adjusting water metering and buffering bucket (43); 所述调浓水输送管道(42)上安装有分别与所述自动控制系统(60)电性连接的第二调节阀(44)和第二电磁流量计(45)。A second regulating valve (44) and a second electromagnetic flowmeter (45) respectively electrically connected to the automatic control system (60) are installed on the concentration-adjusted water delivery pipeline (42). 8.根据权利要求1所述的粗骨料协同尾砂浆精准制备充填系统，其特征在于：所述充填料浆制备系统(50)为卧式强制搅拌机。8 . The precise preparation and filling system for coarse aggregate and tailings mortar according to claim 1 , wherein the filling and filling slurry preparation system ( 50 ) is a horizontal forced mixer. 9 . 9.根据权利要求1所述的粗骨料协同尾砂浆精准制备充填系统，其特征在于：所述底流计量缓存斗(13)包括设置于其内部的称重传感器和设置于其底部的卸料阀门；所述称重传感器和卸料阀门分别与所述自动控制系统(60)电性连接。9 . The precise preparation and filling system for coarse aggregate and tailings mortar according to claim 1 , wherein the underflow metering buffer bucket ( 13 ) comprises a load cell arranged inside and a discharger arranged at the bottom thereof. 10 . valve; the load cell and the discharge valve are respectively electrically connected with the automatic control system (60). 10.一种充填料浆制备充填方法，其特征在于：采用权利要求1至9中任一项权利要求所述的粗骨料协同尾砂浆精准制备充填系统进行制备，采用静态计量-周期制备的循环工艺，包括如下步骤：10. A filling method for filling slurry preparation and filling, characterized in that: using the coarse aggregate synergistic tailings mortar accurate preparation filling system according to any one of claims 1 to 9 for preparation, using static metering-periodic preparation The cycle process includes the following steps: S1，尾砂浆制备：采用尾砂浆浓密存储和计量系统(10)，将尾砂经自稀释絮凝沉降给料桶(19)沉降后，输送至膏体仓储浓密机(11)浓缩后，在充填前打开空压机(17)进行全仓造浆；需要充填时，在渣浆泵(18)的作用下，底流通过底流输送管道(12)扬送至设置于卧式强制搅拌机上部的底流计量缓存斗(13)内；通过自动控制系统(60)设定一个周期制备所需的底流量，充填作业时，当底流量达到设定值时，自动控制系统(60)自动关闭渣浆泵(18)，停止进料，完成底流的计量；称量好的尾砂浆暂存在底流计量缓存斗(13)中，待后续充填料浆制备工序时自动卸料至卧式强制搅拌机中；S1, preparation of tailings slurry: the tailings slurry is densely stored and metered by using the tailings slurry thickening storage and metering system (10), after the tailings are settled in the self-diluting flocculation and sedimentation feeding bucket (19), the tailings are transported to the paste storage thickener (11) for concentration, and then filled in The air compressor (17) is turned on to make pulp in the whole warehouse; when filling is required, under the action of the slurry pump (18), the underflow is lifted through the underflow conveying pipeline (12) to the underflow metering set at the upper part of the horizontal forced mixer In the buffer bucket (13); the bottom flow required for one cycle preparation is set by the automatic control system (60), and during the filling operation, when the bottom flow reaches the set value, the automatic control system (60) automatically shuts down the slurry pump ( 18), stop feeding, and complete the measurement of the underflow; the weighed tailings slurry is temporarily stored in the underflow metering buffer bucket (13), and is automatically discharged to the horizontal forced mixer during the subsequent filling slurry preparation process; S2，粗骨料计量给料：采用粗骨料计量给料系统(20)，将配料机(21)配制好的粗骨料经由输送皮带(22)输送至位于卧式强制搅拌机上部的粗骨料计量缓存斗(23)内；通过自动控制系统(60)设定一个周期制备所需的粗骨料量，充填作业时，当粗骨料重量达到设定值时，自动控制系统(60)自动关闭配料机(21)，停止进料，完成粗骨料的计量；称量好的粗骨料暂存在粗骨料计量缓存斗(23)中，待后续充填料浆制备工序时自动卸料至卧式强制搅拌机中；S2, coarse aggregate metering and feeding: the coarse aggregate metering and feeding system (20) is used to transport the coarse aggregate prepared by the batching machine (21) to the coarse aggregate located at the upper part of the horizontal forced mixer via the conveyor belt (22). The amount of coarse aggregate required for one cycle preparation is set by the automatic control system (60), and during the filling operation, when the weight of the coarse aggregate reaches the set value, the automatic control system (60) The batching machine (21) is automatically closed, feeding is stopped, and the measurement of the coarse aggregate is completed; the weighed coarse aggregate is temporarily stored in the coarse aggregate measurement buffer bucket (23), and the material is automatically unloaded during the subsequent filling slurry preparation process into a horizontal forced mixer; S3，水泥计量给料：采用水泥计量给料系统(30)，将水泥仓(31)内存储的水泥通过仓底的螺旋输送机(32)输送至位于卧式强制搅拌机上部的水泥计量缓存斗(33)内；通过自动控制系统(60)设定一个周期制备所需的水泥重量，充填作业时，当水泥重量达到设定值时，自动控制系统(60)自动关闭螺旋输送机(32)，停止进料，完成水泥的计量；称量好的水泥暂存在水泥计量缓存斗(33)中，待后续充填料浆制备工序时自动卸料至卧式强制搅拌机中；S3, Cement metering and feeding: the cement metering and feeding system (30) is used to transport the cement stored in the cement silo (31) through the screw conveyor (32) at the bottom of the silo to the cement metering buffer hopper located on the upper part of the horizontal forced mixer In (33); the cement weight required for one cycle preparation is set by the automatic control system (60), and during the filling operation, when the cement weight reaches the set value, the automatic control system (60) automatically closes the screw conveyor (32) , stop feeding, and complete the measurement of cement; the weighed cement is temporarily stored in the cement metering buffer bucket (33), and is automatically discharged to the horizontal forced mixer in the subsequent filling slurry preparation process; S4，调浓水计量给料：采用调浓水计量给料系统(40)，将高位水池(41)内存储的调浓水通过调浓水输送管道(42)和第二调节阀(44)自流输送至位于卧式强制搅拌机上部的调浓水计量缓存斗(43)内；通过自动控制系统(60)设定一个周期制备所需的调浓水重量，充填作业时，当调浓水重量达到设定值时，自动控制系统(60)自动关闭第二调节阀(44)，停止进水，完成调浓水的计量；称量好的调浓水暂存在调浓水计量缓存斗(43)中，待后续充填料浆制备工序时自动卸料至卧式强制搅拌机中；S4, metering and feeding of concentrated water: using the concentrated water metering and feeding system (40), the concentrated water stored in the high-level pool (41) is passed through the concentrated water conveying pipeline (42) and the second regulating valve (44) It is automatically conveyed to the metering and buffering bucket (43) of the concentration-adjusted water located at the upper part of the horizontal forced mixer; the weight of the concentration-adjusted water required for one cycle preparation is set by the automatic control system (60). When the set value is reached, the automatic control system (60) automatically closes the second regulating valve (44), stops the water inflow, and completes the metering of the concentrated water; the weighed concentrated water is temporarily stored in the concentrated water metering buffer bucket (43). ), automatically unloading into the horizontal forced mixer during the subsequent filling slurry preparation process; S5，充填料浆制备：所述自动控制系统(60)启动充填料浆制备系统(50)，前述计量好的尾砂浆、粗骨料、水泥和调浓水自动卸料至卧式强制搅拌机中，卧式强制搅拌机进行充填料浆的制备，于此同时，尾砂浆浓密存储和计量系统(10)、粗骨料计量给料系统(20)、水泥计量给料系统(30)、调浓水计量给料系统(40)分别各自进行充填材料计量和缓存的循环工艺步骤；待所述卧式强制搅拌机完成一个周期的充填料浆的制备及卸料后，通过自动控制系统(60)自动关闭设置于述卧式强制搅拌机底部的充填料浆卸料阀门；S5, filling slurry preparation: the automatic control system (60) starts the filling slurry preparation system (50), and the previously measured tailings mortar, coarse aggregate, cement and concentrated water are automatically unloaded into the horizontal forced mixer , the horizontal forced mixer prepares the filling slurry. At the same time, the tailings mortar dense storage and metering system (10), the coarse aggregate metering and feeding system (20), the cement metering and feeding system (30), the concentrated water The metering and feeding system (40) respectively performs the cyclic process steps of filling material metering and buffering; after the horizontal forced mixer completes one cycle of preparation and discharge of the filling slurry, it is automatically closed by the automatic control system (60). The filling slurry discharge valve arranged at the bottom of the horizontal forced mixer; 而后再由自动控制系统(60)分别打开底流计量缓存斗(13)、粗骨料计量缓存斗(23)、水泥计量缓存斗(33)、调浓水计量缓存斗(43)上的卸料阀门，充填材料通过卸料阀门自动卸料至卧式强制搅拌机内，卧式强制搅拌机中进行下一个周期的搅拌处理，并自动将充填料浆卸出；在自动控制系统(60)的调控下，前述各计量缓存斗继续连续循环进行充填物料的计量和缓存。Then, the automatic control system (60) opens the discharge of the underflow metering buffer bucket (13), the coarse aggregate metering buffer bucket (23), the cement metering buffer bucket (33), and the concentrated water metering buffer bucket (43) respectively. Valve, the filling material is automatically discharged into the horizontal forced mixer through the discharge valve, and the next cycle of stirring processing is performed in the horizontal forced mixer, and the filling slurry is automatically discharged; under the control of the automatic control system (60) , the aforementioned metering and buffering buckets continue to circulate continuously for metering and buffering of filling materials.
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