CN104929683A - Total-tailings paste filling and stockpiling combined treatment method based on deep-cone thickener - Google Patents
Total-tailings paste filling and stockpiling combined treatment method based on deep-cone thickener Download PDFInfo
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Abstract
The invention relates to a total-tailings paste filling and stockpiling combined treatment method based on a deep-cone thickener. A combined treatment system is composed of a one-stage or multi-stage pump station, the deep-cone thickener and a two-segment horizontal stirring device. The deep-cone thickener is arranged near the multi-stage pump station. A continuous feeding and discharging mode is adopted for achieving the continuous concentration process, and the two functions of filling and tailings stockpiling are both taken into consideration. In the running process of a filling system, total tailings of a concentration plant are completely thrown into the deep-cone thickener through the one-stage or multi-stage pump station. When filling is needed, deep-cone bottom flow is pumped to the two-segment stirrer through a mortar pump and is mixed with cement, and qualified paste is prepared and flows to or is pumped to a stope. When filling is not needed, the bottom flow is pumped by a plunger pump to a tailings pond by means of the pump station, and stockpiling of paste is performed. The method can well solve the filling problem of a gob and the stockpiling problem of tailings at the same time, filling cost is greatly reduced, the strength of filling bodies is improved, discharge of the tailings is reduced to the maximum extent, and meanwhile tailings paste is discharged.
Description
Technical field
The present invention relates to tailings paste processing technology field, refer to a kind of full tail paste body filling based on deep wimble thickener especially and store up associating method of disposal.
Background technology
2012, five ministries and commissions such as security production supervision and management general bureau expressly provide in " instruction about strengthening Tailings Dam supervision and management further ": can newly-built Underground metal & nonmetal mines must prove adopt the method for mining by the way of filling, and preferentially carry out the method for mining by the way of filling.With this understanding, the application proportion of the method for mining by the way of filling in mine constantly increases, and its technology have also been obtained fast development in recent years.
Along with the application & development of Cut-and-fill Mining Technology, low concentration classified tailings consolidated fill cannot meet modern mine safety, environmental protection, efficiently requirement, is that the highly concentrated cemented fill of main filler or even paste body filling become main flow direction gradually with crude tailings.Field practice also proves, the series of problems such as low concentration filling slurry can bring such as barricade filter net jam, stope slip draining difficulty, down-hole is seriously polluted, cement consumption is high, the layering of obturation segregation, the use of classified tailings simultaneously also can increase the construction and maintenance expense of Tailings Dam, causes the environment pollution on earth's surface.The present invention introduces the new method that a kind of crude tailings paste body filling and tailings impoundment combine disposal, sufficiently lower filling cost, improves strength of filling mass, reduce tailings discharging to greatest extent.Meanwhile, also can significantly improve tailings discharging concentration, increase the stocking angle of mine tailing, thus improve the length of service of Tailings Dam.So crude tailings lotion associating method of disposal can solve goaf filling and tailings impoundment two difficult problems well, ensures that economic and social benefits maximize, meets " Green Mine " and build theory simultaneously.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of full tail paste body filling based on deep wimble thickener and stores up associating method of disposal.System involved by the method comprises crude tailings, deep wimble thickener, flocculant add-on system, cement add-on system, overflow water and lotion stirring system.Wherein crude tailings is generally from ore dressing plant, is pumped to deep wimble thickener; Flocculant add-on system and deep wimble thickener support the use; Cement add-on system supplies cementitious material as required; Concentrator overflow water, to head-tank, is used for regulating paste body filling concentration; Secondary horizontal mixer is used for preparing lotion, stirs the concentrated mine tailing and the cement that need filling, and the lotion prepared flows automatically or is pumped to stope; Do not need the concentrated tailings pump of filling to deliver to Tailings Dam to store up.
Coarse aggregate add-on system, fines add-on system and Admixture add-on system are selected as required.Coarse aggregate and fines are mainly used to regulate lotion proportioning, and then improve lotion mobility and mechanical property.When crude tailings fine particle content is more or mud content is more, and when desirable strength is higher, suitably increases coarse aggregate and fines, be conducive to lotion strength enhancing.Now, set up coarse aggregate and fines storehouse simultaneously, according to laboratory experiment, adjustment is optimized to lotion proportioning, reach the object reducing cement unit consumption, improve Strength of backfill.Wherein coarse aggregate can be the materials such as rubble, Water Quenching Slag, Gobi aggregate, and coarse aggregate is of a size of a certain interval in 2mm ~ 20mm; Fines can be the material such as stock's tailings, rod milling sand, and fines is of a size of a certain interval in 0.2mm ~ 2mm.Admixture add-on system is selected according to lotion conveying and condensation performance need, can be the materials such as pumping admixture, retarding agent, accelerating admixture, flyash.
This associating method of disposal is specific as follows:
(1) crude tailings is diluted, to concentration 5% ~ 15%.Concrete value is determined according to laboratory experiment, is then pumped to deep wimble thickener, delivers in deep wimble thickener simultaneously, carry out flocculating setting, thickening to crude tailings by flocculant add-on system by flocculant;
(2) when needs filling, the underflow pump of deep wimble thickener in step (1) is delivered in the secondary horizontal mixer of lotion stirring system, cement is delivered in secondary horizontal mixer by cement add-on system simultaneously, underflow and cement are fully stirred, and the ointment pumping after stirring carries out filling to stope;
(3) when not needing filling, the underflow of deep wimble thickener in step (1) being flow automatically or is pumped to Tailings Dam, storing up;
(4) overflow water of deep wimble thickener is delivered to head-tank in step (1), then is delivered to secondary horizontal mixer by head-tank and carries out the adjustment of lotion concentration or flushing of pipeline.
Wherein, deep wimble thickener underflow conveyance conduit is provided with threeway conversion valve, switches underflow throughput direction at any time; In step (1), flocculant first dissolves in dissolving tank, controls adding proportion according to crude tailings of different nature by measuring pump; When stirring in secondary horizontal mixer in step (2), add coarse aggregate, fines or Admixture as required.
Crude tailings comes from ore dressing plant.Crude tailings is carried to deep wimble thickener by one-level or multiple stage pumping system, depends on the transporting resistance selecting factory to concentrator top.
Deep wimble thickener is mainly used to dewater to crude tailings.All crude tailings enter deep wimble thickener and carry out processed, and the diameter of deep wimble thickener depends on the treating capacity of Total tailing, and height is comprehensively determined by the treating capacity of mine tailing and underflow density, and concentrator cone angle is run torque-combining determined by mine tailing underflow density, harrow frame.Deep wimble thickener can be that one or more is in parallel according to demand.
Flocculant add-on system and deep wimble thickener support the use.Be mainly used to accelerate mine tailing settling rate, improve concentrator sedimentation, dewatering efficiency.Flocculant add-on system is made up of flocculant, dissolving tank and measuring pump.The concentration of Tailings Slurry will be guaranteed when flocculant mixes with mine tailing.
Cement add-on system is made up of cement, cement bin and conveying worm.Cement bin top seal, conveying worm is used for measuring and conveying cement.
Overflow water refers in particular to deep wimble thickener overflow water, and overflow water is collected in head-tank.Be used for regulating lotion concentration, rinse agitation tank and transfer pipeline etc.
Secondary horizontal mixer is mainly used to stir the lotion needing filling.Make cement and mine tailing Homogeneous phase mixing.The lotion stirred is by plunger displacement pump or certainly flow to stope.The concentrated mine tailing of filling is not needed to be delivered to tailings reservoir for piling by pumping system.
Coarse aggregate, fines and Admixture are deposited in coarse aggregate storehouse, fines storehouse and Admixture storehouse respectively, coarse aggregate and fines are given in secondary horizontal mixer by disk feeder and belt conveyer scale, addition is controlled by belt conveyer scale, Admixture is delivered in secondary horizontal mixer by conveying worm, controls addition by micro mist scale.
The beneficial effect of technique scheme of the present invention is as follows:
The method can be all dense through deep wimble thickener by plant tailing, then determine the whereabouts of mine tailing according to field demand, and namely a set of dense system takes into account filling and tailings impoundment two functions.While making full use of system, high-quality paste body filling can be realized, also can implement lotion draining technology simultaneously.Mainly contain following advantage: the first, whole associating disposal system is made up of one or more levels pumping plant, deep wimble thickener, two sections of Horizontal stirring equipment.Select factory's crude tailings through one or more levels pumping plant, all squeeze into deep wimble thickener.When needing filling, dark cone underflow is pumped to two-stage agitation machine by mortar pump, with cement mixing, prepares qualified lotion, flows automatically or be pumped to stope.When not needing filling, through one or more levels pumping plant, underflow is delivered to Tailings Dam by plunger pump and carry out lotion and store up.The second, deep wimble thickener is arranged near multi stage pumping station, and adopt a stage dewatering technology to overcome the deficiency of vertical sand warehouse pulping underflow instability, technological process is simple, concentration time is short, pulp consistency is even.Meanwhile, adopt continuous feed continuous discharge mode to realize carrying out continuously of concentration process, and concentrator overflow water turbidity can be reduced to below 20NTU.3rd, horizontal mixer has more spiral, many with slurry contact point, by the way of machinery by tailings and cement mixing, has strong adaptability, an advantage that preparation quality is stablized and run continuously.4th, tailings discharging concentration can be increased to slightly saturation state, and slurry discharging modes change lotion discharging modes into, and storing up angle can be increased to 3 ° by 1 °.Meanwhile, improve the safe class of Tailings Dam, save the construction cost of Tailings Dam.
The method is applicable to coloured, the various generation Total tailing such as black, noble metal, rare metal, gold and to filling quality and the higher bargh of environmental requirement.
Accompanying drawing explanation
Fig. 1 is a kind of full tail paste body filling based on deep wimble thickener of the present invention and stores up associating method of disposal flow chart;
Fig. 2 is the existing charging formula schematic diagram in certain ore deposit in embodiments of the invention;
Fig. 3 is transformation rear charging formula schematic diagram in certain ore deposit in embodiments of the invention.
Detailed description of the invention
For making the technical problem to be solved in the present invention, technical scheme and advantage clearly, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
The present invention is directed to that existing paste filling material is single, crude tailings can not get the problems such as effectively utilizations, a kind of full tail paste body filling based on deep wimble thickener is provided and stores up associating method of disposal.
Be illustrated in figure 1 the disposal process figure of the method, crude tailings from ore dressing plant is diluted, to concentration 5% ~ 15%, is then pumped to deep wimble thickener, by flocculant add-on system, flocculant is delivered in deep wimble thickener simultaneously, thickening is carried out to crude tailings; When needs filling, the underflow pump of deep wimble thickener is delivered in the secondary horizontal mixer of lotion stirring system, be delivered in secondary horizontal mixer by cement add-on system by cement, underflow and cement are fully stirred, and the ointment pumping after stirring carries out filling to stope simultaneously; When not needing filling, the underflow of deep wimble thickener being flow automatically or is pumped to Tailings Dam, storing up; The overflow water of deep wimble thickener is delivered to head-tank, then is delivered to secondary horizontal mixer by head-tank and carries out the adjustment of lotion concentration or flushing of pipeline.
Embodiment
Certain gold mine adopts upward horizon filling mining method, and exploitation scale reaches 6000t/d, can meet the confession ore deposit demand selecting factory.At present, this mine filling system mainly adopts classified tailings self-flowing pastefill to carry out filling, Filling density 60%-65%, and according to its mine tailing physical property, this Filling density is obviously on the low side.Meanwhile, filling aggregate dehydration adopts traditional vertical sand warehouse, makes pulping relative concentration lower, and underflow density is unstable.Filling density is low brings problems: this Gold Mine By Filling cement-sand ratio reaches 1:4, and cement consumption is very high; Water unnecessary in filling slurry causes dehydration in stope pressure comparatively large, and ultra-fine grain and cement plug filling counterfort filter cloth in mine tailing cause filling dead zone to dewater difficult; Water too much in slip causes the segregation of large or fine granule, and cement floats on casting resin upper strata, finally causes strength of filling mass uneven.On the other hand, this mill tailings Kuku holds less, and the residue length of service about 2.0 years, once stock is saturated, then needs newly to levy Tailings Dam land used and carry out Tailings Dam construction, this will be a no small spending.Use full tail paste body filling of the present invention and store up associating method of disposal and transform existing filling system, before and after transformation, filling exemplary flow is as Fig. 2 and Fig. 3.Detailed description of the invention is described as follows:
The first, retain the I and II pumping plant of former filling system, newly-increased deep wimble thickener, two sections of horizontal mixers and two plunger displacement pumps.Select factory's crude tailings through the dense dehydration of deep wimble thickener, when needing filling, dark cone underflow is pumped to two-stage agitation machine through mortar pump, with cement mixing to prepare qualified lotion, certainly flow to stope.When not needing filling, underflow pump delivered to Tailings Dam through secondary pumping station and carry out lotion and store up.
The second, the Strength of backfill that this gold mine requires is 1-2MPa, according to different quality mark, cement-sand ratio casting resin strength test results that this mine provides, for the paste body filling concentration of 70%, reach 1MPa intensity, cement-sand ratio 1:9; 2MPa intensity, the cement-sand ratio of 1:7 can meet.
After existing charging formula being transform as to paste body filling and discharge associating disposal method, its superiority is summarized as follows:
(1) cement unit consumption reduces, and reduces filling cost
Cement-sand ratio is reduced to 1:7 to 1:9 by 1:4, and cement consumption can reduce half.For considerable economic benefit is brought in mine, filling cost saves 1,399 ten thousand yuan/year.
(2) segregation reduces, and Strength of backfill is even
Because Filling density is high, casting resin segregation phenomenon reduces, and Strength of backfill uniformity is good.And down-hole dehydration is few, reduces subsurface environment and pollute.If employing paste body filling, year charging quantity 79.4 ten thousand m
3, concentration brings up to 70% from 60%, reduces drainage underground amount about 23.8 ten thousand m
3.
(3) increase Tailings Dam storage capacity, reduce expropriation of land cost
Tailings discharging concentration is increased to more than 68% by 35%.Add the stocking angle of mine tailing, improve the Tailings Dam length of service.According to engineering analogy, identical Tailings Dam takes up an area, and conservative estimation, storage capacity can improve three times.Meanwhile, improve the safe class of Tailings Dam, significant, for the construction cost of Tailings Dam is saved in mine.
Tailings storage backwater taperedly become backwater before factory, reduce evaporation capacity, improve the water resource rate of recovery.The dense overflow water of dark cone can directly as living water uses such as production and middle water.Concentration of emission is increased to 68% by 35%, then before factory, directly backwater has more 7900t/d.The price of water is according to 4 yuan/m
3count, the water price lattice reclaimed considerable more, and this is also that lotion discharge integrated cost will significantly lower than one of the reason of conventional wet row.
(4) social benefit is good
Full tail paste body filling mining codes are environmentally friendly, can reduce tailings discharging to greatest extent, reduce pollution and the destruction of environment, are considered to one of Important Action realizing " Green Mine ".
To associating disposal method and original schemes synthesis economic efficiency contrast as table 1.
Table 1 two schemes technology and economy comparison table
As can be seen from Table 1, although paste body filling planning device input aspect is more, take a long view, paste body filling scheme economic benefit will be far superior to existing scheme.Therefore, adopt crude tailings lotion associating disposal method to not only increase the quality of Underground filler, extend the life-span of Tailings Dam, increase the safe class of Tailings Dam, also drastically increase economic and social benefit.
The above is the detailed description of the invention in certain ore deposit of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. the full tail paste body filling based on deep wimble thickener and store up associating method of disposal, it is characterized in that: the method relates to crude tailings, deep wimble thickener, flocculant add-on system, cement add-on system, overflow water and lotion stirring system, and concrete method of disposal is as follows:
(1) crude tailings is diluted, to concentration 5% ~ 15%, be then pumped to deep wimble thickener, by flocculant add-on system, flocculant is delivered in deep wimble thickener simultaneously, thickening is carried out to crude tailings;
(2) when needs filling, the underflow pump of deep wimble thickener in step (1) is delivered in the secondary horizontal mixer of lotion stirring system, cement is delivered in secondary horizontal mixer by cement add-on system simultaneously, underflow and cement are fully stirred, and the ointment pumping after stirring carries out filling to stope;
(3) when not needing filling, the underflow of deep wimble thickener in step (1) being flow automatically or is pumped to Tailings Dam, storing up;
(4) overflow water of deep wimble thickener is delivered to head-tank in step (1), then is delivered to secondary horizontal mixer by head-tank and carries out the adjustment of lotion concentration or pipeline-cleaning.
2. a kind of full tail paste body filling based on deep wimble thickener according to claim 1 and store up associating method of disposal, is characterized in that: described deep wimble thickener underflow conveyance conduit is provided with threeway conversion valve, controls underflow and delivers to filling or store up.
3. a kind of full tail paste body filling based on deep wimble thickener according to claim 1 and store up associating method of disposal, it is characterized in that: described flocculant add-on system comprises flocculant, dissolving tank and measuring pump, in step (1), flocculant controls adding proportion according to different crude tailings character by measuring pump after first dissolving in dissolving tank.
4. a kind of full tail paste body filling based on deep wimble thickener according to claim 1 and store up associating method of disposal, is characterized in that: described in step (1), crude tailings is delivered in deep wimble thickener by one or more levels pumping system.
5. a kind of full tail paste body filling based on deep wimble thickener according to claim 1 and store up associating method of disposal, is characterized in that: deep wimble thickener described in step (1) is in parallel for one or more.
6. a kind of full tail paste body filling based on deep wimble thickener according to claim 1 and store up associating method of disposal, it is characterized in that: described in step (2), cement add-on system comprises cement, cement bin and conveying worm, wherein, cement bin top seal, controls addition and conveying cement according to different crude tailings character by conveying worm.
7. a kind of full tail paste body filling based on deep wimble thickener according to claim 1 and store up associating method of disposal, it is characterized in that: when secondary horizontal mixer stirs in described step (2), add zero kind or several in coarse aggregate, fines, Admixture.
8. a kind of full tail paste body filling based on deep wimble thickener according to claim 1 or 7 and store up associating method of disposal, is characterized in that: described coarse aggregate is one or more in rubble, Water Quenching Slag, Gobi aggregate, and coarse aggregate is of a size of 2-20mm.
9. a kind of full tail paste body filling based on deep wimble thickener according to claim 1 or 7 and store up associating method of disposal, is characterized in that: described fines is one or both in stock's tailings, rod milling sand, and fines is of a size of 0.2-2mm.
10. a kind of full tail paste body filling based on deep wimble thickener according to claim 1 or 7 and store up associating method of disposal, is characterized in that: described Admixture is one or more in pumping admixture, retarding agent, accelerating admixture, flyash.
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| CN106065783A (en) * | 2016-07-20 | 2016-11-02 | 铜陵有色设计研究院 | Device for filling and using method thereof for extensive non-metal mine |
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| CN107654256A (en) * | 2017-09-14 | 2018-02-02 | 北京科技大学 | A kind of mine anury exhaust system and method based on deep wimble thickener |
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| CN108266223A (en) * | 2017-12-15 | 2018-07-10 | 中国华冶科工集团有限公司 | The method that high-sulfur tailings prepares filling in mine material with Gobi aggregate |
| CN108252734A (en) * | 2017-12-18 | 2018-07-06 | 金川集团股份有限公司 | A kind of placement method of Desending slicing Drift stoping underground goaf |
| CN108661703A (en) * | 2018-04-28 | 2018-10-16 | 长沙矿山研究院有限责任公司 | coarse fraction tailing paste filling method and filling system |
| CN109578071A (en) * | 2019-01-18 | 2019-04-05 | 北京科技大学 | A kind of movable-type intelligent Paste-filling System |
| CN110590222A (en) * | 2019-10-12 | 2019-12-20 | 长沙矿山研究院有限责任公司 | Filling method of low-density high-strength full-tailing slurry |
| CN110561617A (en) * | 2019-10-12 | 2019-12-13 | 长沙矿山研究院有限责任公司 | Full-tailing slurry filling system with low density and high strength |
| CN111514622A (en) * | 2020-06-11 | 2020-08-11 | 安徽铜冠（庐江）矿业有限公司 | Production system for underground filling and tailing pond stacking and tailing concentration process |
| CN113217090A (en) * | 2021-03-19 | 2021-08-06 | 代县双立选厂 | Large-scale low-concentration tailing dry-discharging treatment and paste treatment combined treatment method |
| CN113735544A (en) * | 2021-08-31 | 2021-12-03 | 鑫选(厦门)矿冶科技有限公司 | Gel material and mine filling system |
| CN114109487A (en) * | 2021-11-09 | 2022-03-01 | 北京科技大学 | Coarse fraction full tailing paste filling method |
| CN114100844A (en) * | 2021-11-12 | 2022-03-01 | 河南金源黄金矿业有限责任公司 | Process for comprehensive recovery and concentrated discharge of tailings |
| CN114100844B (en) * | 2021-11-12 | 2024-04-30 | 河南金源黄金矿业有限责任公司 | Process for comprehensively recovering and concentrating tailings |
| CN114474406A (en) * | 2022-02-18 | 2022-05-13 | 中冶沈勘工程技术有限公司 | High-concentration full-tailing cemented filling system |
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