CN113860449A - Efficient tailing sedimentation method for tailing filling - Google Patents
Efficient tailing sedimentation method for tailing filling Download PDFInfo
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- CN113860449A CN113860449A CN202111164449.8A CN202111164449A CN113860449A CN 113860449 A CN113860449 A CN 113860449A CN 202111164449 A CN202111164449 A CN 202111164449A CN 113860449 A CN113860449 A CN 113860449A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
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Abstract
The invention discloses a high-efficiency tailing sedimentation method for tailing filling, which comprises the following steps: before high-speed tailing slurry is conveyed to a sand silo for sedimentation, a flocculating agent is added into the conveyed slurry to accelerate the sedimentation speed; when the high-speed tailing slurry is conveyed into the sand silo, the speed and the kinetic energy of the high-speed tailing slurry entering the sand silo for clarifying liquid are reduced through the buffering and decelerating device; an isolation device is arranged in the sand silo to separate the feeding position of the high-speed slurry in the sand silo from the clarified liquid at the clarification overflow part in the sand silo, so that the disturbance of the feeding to the clarified liquid is reduced. According to the invention, the flocculating agent is added, so that tiny sand grains form larger grains under the action of the flocculating agent, the sedimentation efficiency of the tiny sand grains is improved, the buffering speed reducer and the isolating device are arranged, the feeding slurry speed and kinetic energy are reduced, the disturbance influence of the feeding slurry speed and kinetic energy on a clear liquid is reduced, and the isolating device is combined to reduce the content of the sand grains in an overflow liquid and improve the sedimentation efficiency of the slurry sand grains.
Description
Technical Field
The invention relates to the technical field of mining, in particular to a method for efficiently settling tailings in tailing filling.
Background
The cut-and-fill mining method is a mining method in which a gob is filled with a filler along with ore breakage, transportation, and other operations. The purpose of filling is to support two sides of rocks in the goaf and to form a footing bottom plate for continuous upper layer mining. The filling mining method basically adopts a tailing filling method, namely tailings in the mining process are made into slurry, then the tailing slurry is conveyed into a sand silo to be deposited in a pumping mode, the deposited sand is mixed with adhesives such as cement and the like to prepare a filling mixture, and the filling mixture is injected into a mine pit formed by mining to realize the filling of the mine pit.
In the process of settling and clarifying the mortar, because the sand silo is in a continuous feeding state, the feeding mortar always disturbs the clarified liquid in the sand silo, the feeding mortar always has a great interference effect on the clarified liquid, and the settling efficiency of the sand silo is greatly reduced. Therefore, there is a need for those skilled in the art to design a method that can greatly reduce the kinetic energy of the fed slurry and the disturbance influence of the fed slurry on the clarified liquid, thereby improving the efficiency and quality of sand silo settlement.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the tailing efficient sedimentation method in iron ore filling is provided, the disturbance of feeding slurry to clarified liquid in a sand silo is reduced by adding a flocculating agent and reducing the kinetic energy of the feeding slurry of the sand silo, and the sedimentation effect and efficiency of the clarified liquid are improved, so that the efficiency of the whole filling process is improved.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a high-efficiency tailing sedimentation method for tailing filling comprises the following steps:
s1: before high-speed tailing slurry is conveyed to a sand silo for sedimentation, a flocculating agent is added into the conveyed slurry to accelerate the sedimentation speed;
s2: when the high-speed tailing slurry is conveyed into the sand silo, the speed and the kinetic energy of the high-speed tailing slurry entering the sand silo for clarifying liquid are reduced through the buffering and decelerating device;
s3: an isolation device is arranged in the sand silo to separate the feeding position of the high-speed slurry in the sand silo from the clarified liquid at the clarification overflow part in the sand silo, so that the disturbance of the feeding to the clarified liquid is reduced.
In step S1, a flocculant adding device is used to add the flocculant, and the flocculant is mixed with the slurry by drop addition.
Further, the addition method of the flocculant comprises the following steps: the isolation barrel that all link up about setting up in the sand silo, during high-speed thick liquids got into the isolation barrel, simultaneously, the flocculating agent was gone into the isolation barrel through the measuring pump, realized the mixture of flocculating agent and thick liquids through the isolation barrel.
Further, the buffering and decelerating device in the step S2 includes an outer tube formed by a steel wire mesh, a filter cloth layer disposed in the outer tube for filtering, separating and decelerating, and a flange for connecting and fixing.
Further, the speed reduction method of the buffering speed reduction device comprises the following steps: after the slurry enters the filter cloth layer, due to the filtering and permeating action of the filter cloth, part of liquid in the slurry flows out from the filter cloth in a seepage mode, so that the liquid in the slurry is reduced, the kinetic energy of the slurry is reduced, meanwhile, the filter cloth layer increases the running resistance of the slurry, the speed of the slurry entering the clarifying solution is also reduced, and the buffer deceleration of the slurry is realized.
Further, the isolation device in the step S3 includes two isolation plates fixed in the sand silo; wherein, the feed inlet of the slurry is positioned between the two isolation plates; the position of the feed inlet is isolated from the upper part of the outside clarified liquid by the isolating plate.
Further, the addition amount of the flocculating agent and the weight ratio of the slurry are as follows: 25 g/ton.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention adds the flocculating agent to enable the tiny sand grains to form larger grains under the action of the flocculating agent, thereby improving the sedimentation efficiency of the tiny sand grains, meanwhile, the arranged buffering speed reducer can effectively reduce the speed and the kinetic energy of the fed slurry entering the clarified liquid, reduce the disturbance influence of the feed slurry on the clarified liquid, and then, the arrangement of the isolation device is combined to enable the feed disturbance and the outer side clarification to isolate the overflowed liquid, reduce the sand grain content in the overflowed liquid, and improve the sedimentation efficiency of the slurry sand grains. The method disclosed by the invention has the advantage that the sedimentation efficiency of sand grains in tailing filling is greatly improved through reasonable combination of various methods.
(2) The weight ratio of the flocculating agent to the mortar is 25g/t, so that the use amount of the flocculating agent can be saved to the maximum extent on the premise of ensuring the sedimentation efficiency of the mortar, and the ore filling cost is saved.
Drawings
FIG. 1 is a schematic view of the structure of the apparatus for the settling method of the present invention.
Fig. 2 is a schematic structural diagram of the buffering and decelerating device in the invention.
Wherein, the names corresponding to the reference numbers are:
1-a flocculating agent adding device, 2-a buffering speed reducer, 3-an isolation barrel, 4-an outer pipe, 5-a filter cloth layer, 6-a flange and 7-an isolation plate.
Detailed Description
The present invention will be further described with reference to the following description and examples, which include but are not limited to the following examples.
As shown in FIGS. 1-2:
a high-efficiency sedimentation method of tailings used in iron ore filling comprises the following steps:
the suspended matters in the overflow water of the mortar are mostly solid micro-particles, and the micro-particles with the particle size of 1-10 are subjected to the action of force in a pulp system to keep a suspended state. The solid particles are dissociated in water to adsorb electrons and form an electric double layer, the distance between the particles is increased under the action of electric field force, and the particles are difficult to collide and agglomerate through Brownian motion under the action of electric field repulsion force. In order to increase the settling efficiency and improve the overflow water quality, it is necessary to add an electrolyte to compress the double electric layers of the fine particles and lower the electrokinetic potential to destabilize the particles and settle them.
Thus, as shown in fig. 1: before high-speed tailing slurry is conveyed to a sand silo for sedimentation, a flocculating agent is added into the conveyed slurry to accelerate the sedimentation speed; when the flocculant is added, a flocculant adding device 1 is adopted, the flocculant and the slurry are mixed in a dropping adding mode, and the optimal mass ratio of the flocculant to the slurry is 25 g/ton through test verification. After the flocculant is added, the flocculant with the polymer chain structure can form a plurality of connecting bridges between fine particles and fine particles, between fine particles and coarse particles and between coarse particles and coarse particles to form a planar spatial network structure, so that the coarse and fine particles are distributed more uniformly, ultrafine particles can be captured more, more ultrafine particles and coarse particles are settled together, and the content of ultrafine particle tailings in overflow water is greatly reduced.
Tests and practices show that the influence of the working condition environment on tailing sedimentation, and a large number of tests and production practices show that static sedimentation is favorable for rapidly improving the concentration of slurry, the larger the sedimentation area is, the higher the sand silo is, the more favorable the clarification of overflow water is, so that the kinetic energy of the slurry is reduced and weakened by adding a damping system to the sand silo, the purposes of improving the sedimentation speed of the tailing and improving the filling concentration are achieved, and the speed and the kinetic energy of high-speed tailing slurry entering the sand silo for clarifying liquid are reduced by the buffering and speed reducing device 2 when the high-speed tailing slurry is conveyed into the sand silo; the specific method comprises the following steps: the isolation barrel 3 which is communicated with the sand silo up and down is arranged in the sand silo, high-speed slurry enters the isolation barrel 2, and meanwhile, a flocculating agent is pumped into the isolation barrel through a metering pump, and the flocculating agent and the slurry are mixed through the isolation barrel. As shown in fig. 2: the buffering and decelerating device comprises an outer pipe 4 formed by a steel wire mesh, a filter cloth layer 5 arranged in the outer pipe 4 and used for filtering, separating and decelerating, and a flange 6 used for connecting and fixing. After the slurry enters the filter cloth layer, due to the filtering and permeating action of the filter cloth, part of liquid in the slurry flows out from the filter cloth in a seepage mode, so that the liquid in the slurry is reduced, the kinetic energy of the slurry is reduced, meanwhile, the filter cloth layer increases the running resistance of the slurry, the speed of the slurry entering the clarifying solution is also reduced, and the buffer deceleration of the slurry is realized.
Meanwhile, in order to further reduce the disturbance influence of the fed slurry on the clarified liquid, an isolation device is arranged in the sand silo to separate the feeding position of the high-speed slurry in the sand silo from the clarified liquid at the clarification overflow part in the sand silo, so that the disturbance of the fed slurry on the clarified liquid is reduced; the isolation device comprises two isolation plates 7 fixed in the sand silo; wherein, the feed inlet of the slurry is positioned between the two isolation plates; the position of feed inlet and the upper portion of outside clarified liquid are kept apart to the division board, and this kind of mode of setting up just makes the disturbance of feeding thick liquids can not directly transmit for outside clarification back, with the liquid of overflow promptly, can fully guarantee the clarification effect of overflow clarified liquid, reduces the fine sand grain that clarified liquid overflow runs off.
The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and should not be used to limit the scope of the present invention, but all the insubstantial modifications or changes made within the spirit and scope of the main design of the present invention, which still solve the technical problems consistent with the present invention, should be included in the scope of the present invention.
Claims (7)
1. A tailing efficient sedimentation method used in tailing filling is characterized in that: the method comprises the following steps:
s1: before high-speed tailing slurry is conveyed to a sand silo for sedimentation, a flocculating agent is added into the conveyed slurry to accelerate the sedimentation speed;
s2: when the high-speed tailing slurry is conveyed into the sand silo, the speed and the kinetic energy of the high-speed tailing slurry entering the sand silo for clarifying liquid are reduced through the buffering and decelerating device;
s3: an isolation device is arranged in the sand silo to separate the feeding position of the high-speed slurry in the sand silo from the clarified liquid at the clarification overflow part in the sand silo, so that the disturbance of the feeding to the clarified liquid is reduced.
2. The efficient sedimentation method for tailings in tailings filling according to claim 1, wherein the efficient sedimentation method comprises the following steps: in step S1, a flocculant adding device is used to mix the flocculant with the slurry by drop addition.
3. The efficient tailing sedimentation method for tailing filling according to claim 2, characterized in that: the addition method of the flocculant comprises the following steps: the isolation barrel that all link up about setting up in the sand silo, during high-speed thick liquids got into the isolation barrel, simultaneously, the flocculating agent was gone into the isolation barrel through the measuring pump, realized the mixture of flocculating agent and thick liquids through the isolation barrel.
4. A method for efficient sedimentation of tailings in tailings packing according to claim 1 or 3, wherein the method comprises the following steps: the buffering and decelerating device in the step S2 includes an outer tube formed by a steel wire mesh, a filter cloth layer arranged in the outer tube for filtering, separating and decelerating, and a flange for connecting and fixing.
5. The efficient tailing sedimentation method for tailing filling according to claim 4, wherein the efficient tailing sedimentation method comprises the following steps: the speed reduction method of the buffering speed reduction device comprises the following steps: after the slurry enters the filter cloth layer, due to the filtering and permeating action of the filter cloth, part of liquid in the slurry flows out from the filter cloth in a seepage mode, so that the liquid in the slurry is reduced, the kinetic energy of the slurry is reduced, meanwhile, the filter cloth layer increases the running resistance of the slurry, the speed of the slurry entering the clarifying solution is also reduced, and the buffer deceleration of the slurry is realized.
6. The efficient sedimentation method of tailings for use in tailing filling according to claim 1 or 5, wherein: the isolation device in the step S3 comprises two isolation plates fixed in the sand silo; wherein, the feed inlet of the slurry is positioned between the two isolation plates; the position of the feed inlet is isolated from the upper part of the outside clarified liquid by the isolating plate.
7. The efficient sedimentation method of tailings for use in tailing filling according to claim 1 or 5, wherein: the weight ratio of the addition amount of the flocculating agent to the slurry is as follows: 25 g/ton.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201729699U (en) * | 2010-07-14 | 2011-02-02 | 长沙有色冶金设计研究院 | Thickening and dewatering device and vertical sand tank adopting same |
| CN110152359A (en) * | 2019-05-23 | 2019-08-23 | 金诚信矿山工程设计院有限公司 | A kind of no rake selects the dense sand warehouse of tailing |
| CN111603808A (en) * | 2020-07-01 | 2020-09-01 | 长沙矿山研究院有限责任公司 | Feeding device for thickener and mounting method thereof |
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- 2021-09-30 CN CN202111164449.8A patent/CN113860449B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201729699U (en) * | 2010-07-14 | 2011-02-02 | 长沙有色冶金设计研究院 | Thickening and dewatering device and vertical sand tank adopting same |
| CN110152359A (en) * | 2019-05-23 | 2019-08-23 | 金诚信矿山工程设计院有限公司 | A kind of no rake selects the dense sand warehouse of tailing |
| CN111603808A (en) * | 2020-07-01 | 2020-09-01 | 长沙矿山研究院有限责任公司 | Feeding device for thickener and mounting method thereof |
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