CN109496481B - Closed tailing pond reclamation system and method - Google Patents
Closed tailing pond reclamation system and method Download PDFInfo
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- CN109496481B CN109496481B CN201710828557.8A CN201710828557A CN109496481B CN 109496481 B CN109496481 B CN 109496481B CN 201710828557 A CN201710828557 A CN 201710828557A CN 109496481 B CN109496481 B CN 109496481B
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B79/00—Methods for working soil
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Abstract
The invention discloses a closed tailing pond reclamation system and a method, wherein the closed tailing pond system comprises: dry beach surface; the clarification zone is positioned in a reservoir area water collection zone at the downstream of the dry beach surface; the pulping equipment is used for preparing clay slurry from clay used for closed reclamation of the tailing pond; and the conveying equipment is connected with the slurry making equipment and is used for hydraulically filling the clay slurry to the dry beach surface. The closed tailing pond reclamation system provided by the embodiment of the invention has the advantages of high safety and stability, high operation efficiency, low cost, no weather interference and the like.
Description
Technical Field
The invention relates to the technical field of hydraulic filling, in particular to a closed tailing pond reclamation system and a closed tailing pond reclamation method.
Background
Tailings are waste residues discharged after useful minerals are sorted in a dressing plant, and are mainly discharged into a tailing pond through hydraulic conveying in the form of tailing slurry. And after the tailing slurry is discharged into a tailing pond, carrying out hydraulic classification, sedimentation and consolidation under the action of gravity. The tailing particles on the dry beach surface are distributed regularly from the dam to the reservoir from coarse to fine and layered deposition, and the dry beach surface correspondingly transits from a relative hard shell area to a soft base area. The tailings are themselves an "artificial soil" with some of the physical characteristics of soil.
And (4) closing the tailings pond after the service period of the tailings pond expires. After the tailing pond is closed, the safety level of the tailing pond is still a permanent structure, and the safety and the stability of the tailing pond must be ensured. At present, the traditional process method for closed-warehouse reclamation of tailings at home and abroad adopts clay, and adopts mechanical earthing and mechanical rolling for a region needing closed-warehouse reclamation, and the process has the following defects:
in the dry beach soft foundation area, mechanical equipment cannot operate on the dry beach soft foundation area at all, and the clay material only loosely covers the dry beach, so that the clay layer is mechanically reclaimed, the cementation condition of the clay material and the dry beach of the tailings is not ideal, good composite soil cannot be formed, the growth of reclaimed vegetation on the clay layer is not facilitated, and the consolidation and the stability of a shell layer of a tailing dam are also not facilitated;
the consolidation degree on the dry beach surface of the tailing pond is unbalanced, part of beach surfaces are in a soft foundation sludge shape, and the rolling equipment has collapse danger in the operation of the soft foundation area, so the personal safety of operators is endangered;
the operation is limited by weather, for example, the construction is very difficult in rainy days;
when mechanical equipment such as a bulldozer and the like is used for land reclamation on dry beach surfaces, the soil covering thickness is difficult to control strictly, the soil covering thickness is not uniform, the waste of clay materials is caused (the clay resources in China are precious), and the engineering investment of closed-warehouse reclamation is increased.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the closed tailing pond reclamation system has the advantages of being high in safety and stability, high in operation efficiency, low in cost, free of weather interference and the like.
The invention also provides a closed tailing pond reclamation method.
According to the embodiment of the first aspect of the invention, the closed tailings pond reclamation system comprises: dry beach surface; a clarification zone located at a reservoir area catchment area downstream of the dry beach face; the pulping equipment is used for preparing clay slurry from clay used for closed reclamation of the tailing pond; and the conveying equipment is connected with the slurry making equipment and is used for hydraulically filling the clay slurry to the dry beach surface.
The closed tailing pond reclamation system provided by the embodiment of the invention has the advantages of high safety and stability, high operation efficiency, low cost, no weather interference and the like.
In addition, the closed tailings pond reclamation system according to the above embodiment of the invention may also have the following additional technical features:
according to one embodiment of the invention, the pulping apparatus comprises: the conveying equipment is connected with the pulp making tank; a liquid adding device for adding liquid into the pulping tank; the stirrer is arranged in the slurry making pool.
According to one embodiment of the invention, the pulping apparatus further comprises a nutrient addition device for adding nutrient to the pulping tank.
According to an embodiment of the invention, if the clay of the closed tailings pond is acidic, the nutrient medium is alkaline; and if the clay of the closed tailings reservoir is alkaline, the nutrient medium is acidic.
According to one embodiment of the invention, the conveying apparatus comprises: the conveying main pipe is connected with the pulp making equipment; and the conveying branch pipes are connected with the conveying main pipe.
According to one embodiment of the invention, a plurality of said transfer legs are evenly distributed over said dry beach surface.
According to an embodiment provided by the second aspect of the invention, a closed tailings pond reclamation method comprises the following steps: s1: preparing clay into clay slurry; s2: and hydraulically filling the clay slurry to a dry beach surface.
The closed tailing reclamation method provided by the embodiment of the invention has the advantages of high safety and stability, high operation efficiency, low cost, no weather interference and the like.
According to an embodiment of the present invention, in the step S1, a nutrient medium is added to the clay, if the tailings are acidic, the nutrient medium is alkaline; if the tailings are alkaline, the nutrient medium is acidic.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a closed tailings pond reclamation system according to an embodiment of the invention;
fig. 2 is a flow chart of a closed tailings pond reclamation method according to an embodiment of the invention.
Reference numerals are as follows:
a closed tailing pond reclamation system 100;
a pulp making apparatus 10; a pulp making tank 11; a blender 12;
a conveying device 20; a conveying main pipe 21; a delivery manifold 22;
a dry beach surface 30;
a clarification zone 40.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The tailings pond closed reclamation system 100 according to the embodiment of the present invention is described below with reference to the accompanying drawings.
As shown in fig. 1, the closed tailings pond reclamation system 100 according to the embodiment of the present invention includes: dry beach 30, clarification zone 40, slurrification apparatus 10 and transport apparatus 20.
The clarification zone 40 is located in the sump area catchment zone downstream of the dry beach face 30. The slurry making equipment 10 is used for making clay slurry from clay used for closed reclamation of the tailing pond. The conveying device 20 is connected with the slurry making device 10 and is used for hydraulically filling clay slurry to a dry beach surface 30.
Specifically, the dry beach 30 is formed by draining tailing slurry into a tailing pond, and then performing hydraulic classification, sedimentation and consolidation under the action of gravity. The tailings particles on the dry beach surface 30 are distributed from coarse to fine and layered from the dam to the reservoir, and the dry beach surface 30 correspondingly passes from a relatively hard shell area to a soft base area. The clarification zone 40 is located in the sump area catchment zone downstream of the beach surface 30. The slurry making equipment 10 makes clay into clay slurry and then conveys the clay slurry to the dry beach surface 30 by the conveying equipment 20, the conveying equipment 20 uniformly distributes the clay slurry on the dry beach surface 30 of the tailing pond by utilizing the hydraulic filling effect, the water in the clay slurry permeates into the clarification area 40 of the tailing pond, and the clarified water in the clarification area 40 is discharged out of the tailing pond by the existing flood discharge facility of the tailing pond.
According to the closed tailing pond reclamation system 100 disclosed by the embodiment of the invention, the clay is changed into clay slurry from a natural soil state through a slurry making process by the slurry making equipment 10, and the characteristics of the hydraulic filling damming process of the tailing dam are scientifically coupled, so that the hydraulic filling clay and the dry beach surface 30 of the tailing pond are well combined to form perfect composite soil, and the safety and stability of the tailing dam are favorably enhanced. Meanwhile, through the controllability of the conveying capacity of the conveying equipment 20, the thickness of the clay slurry filled each time is very small, so that the total thickness of the filled clay can be accurately and effectively controlled, the thickness of the clay filled and reclaimed is effectively controlled, the utilization rate of the clay is high, the waste of the clay is avoided, and the ecological and economic dual effects are exerted. Moreover, the operation of conveying and discharging the clay slurry to the dry beach surface 30 is simple and easy, the operation efficiency is high, and the cost is low. The defect that the traditional technology relies on the traditional mechanical soil covering and rolling technology to reclaim the clay and has selectivity to the weather is overcome, and the defect that the soft foundation cannot be constructed or potential safety hazards exist in the construction process on the dry beach surface 30 of the tailing pond is avoided. Therefore, the closed tailing pond reclamation system 100 provided by the embodiment of the invention has the advantages of high safety and stability, high operation efficiency, low cost, no weather interference and the like.
The closed tailings pond reclamation system 100 according to the embodiment of the present invention is described below with reference to the accompanying drawings.
In some embodiments of the present invention, as shown in fig. 1, a slurrification apparatus 10 includes: a slurry making tank 11, a liquid adding device and a stirring machine 12.
Wherein the conveying device 20 is connected to the machine chest 11. The liquid adding device is used for adding liquid into the pulping tank 11. The mixer 12 is provided in the slurry tank 11. Specifically, the slurry making pool 11 is located at the periphery of the tailing pond, the conveying device 20 is communicated with the slurry making pool 11, clay slurry in the slurry making pool 11 is conveyed to the dry beach surface 30 through the conveying device 20, liquid added into the slurry making pool 11 by the liquid adding device can be water or other liquid, the liquid and the clay are mixed to be made into clay slurry, and the stirring machine 12 is arranged in the slurry making pool 11 and is used for uniformly mixing the liquid and the clay.
Optionally, the pulping apparatus 10 further comprises a nutrient addition device for adding nutrient to the pulping tank 11. Under the condition that tailings or clay components cannot meet the requirements of vegetation growth, the nutrient medium is added into the clay slurry in the slurry making pond 11, so that the vegetation growth reclaimed on the dry beach surface 30 is facilitated after the clay slurry on the dry beach surface 30 is solidified, and the reclamation effect is good. The composition of the nutrient medium is determined according to the composition of the tailings or the clay in actual conditions.
Further, if the tailings are acidic, the nutrient medium is alkaline, and acidic substances in the tailings can be neutralized. If the tailings are alkaline, the nutrient medium is acidic, and alkaline substances in the tailings can be neutralized. If the reclamation soil is barren and the fertilizer content is low, substances with good fertility are added. Therefore, the reclaimed vegetation has good growth effect and is not easy to lose water and soil.
Optionally, the slurrying apparatus 10 produces a clay slurry having a concentration of no less than 35%. When the concentration of the clay slurry is lower than 35%, the cementing effect of the clay slurry on the dry beach surface 30 is poor, and the consolidation and the stability of the shell layer of the tailing dam are not facilitated. Therefore, when the concentration of the clay slurry is not lower than 35%, the consolidation effect of the clay slurry is good, the efficiency is high, and the clay layer on the dry beach surface 30 is stable and is not easy to run off.
In one embodiment of the present invention, as shown in FIG. 1, a delivery apparatus 20 includes a delivery trunk 21 and a plurality of delivery branches 22. The conveying main pipe 21 is connected with the pulp making equipment 10. A plurality of delivery branch pipes 22 are connected to the delivery trunk pipe 21.
Further, the plurality of delivery legs 22 are evenly distributed over the dry beach 30.
Specifically, the conveying main pipe 21 is connected to the slurry making apparatus 10, and clay slurry is conveyed from the slurry making apparatus 10 to the conveying main pipe 21 and then uniformly conveyed to the dry beach 30 through the plurality of conveying branch pipes 22. The number and arrangement of the plurality of conveying branch pipes 22 are specifically set according to the shape and area size of the dry beach surface 30 of the tailings pond, for example, in the embodiment shown in fig. 1, the plurality of conveying branch pipes 22 are arranged side by side along the shape of the dry beach surface 30. Therefore, the clay slurry can be uniformly deposited on the dry beach surface 30, and the coverage effect of the clay slurry is good.
The closed-pit reclamation method for the tailings ponds according to the embodiment of the invention comprises the following steps:
s1: preparing clay into clay slurry;
s2: the clay slurry is hydraulically flushed to the dry beach 30.
According to the closed tailings pond reclamation method provided by the embodiment of the invention, the clay used for reclamation is made into clay slurry through the slurry making equipment 10 and then is conveyed to the dry beach face 30 through the conveying equipment 20, so that potential safety hazards caused by using mechanical equipment such as a bulldozer and the like to reclaim the dry beach face can be avoided, the construction environment is not limited by weather factors, and the closed tailings pond reclamation method has the advantages of high safety and stability, high operation efficiency, low cost, no weather interference and the like.
According to one embodiment of the invention, in step S1, a nutrient medium is added to the clay, if the tailings are acidic, the nutrient medium is alkaline; if the tailings are alkaline, the nutrient medium is acidic. Therefore, by adding the nutrient medium into the clay, the property of the tailings can be improved after the clay slurry is consolidated on the dry beach face 30, so that the consolidated clay is beneficial to the growth of vegetation, and the reclamation effect is good.
Alternatively, the concentration of the clay slurry produced in step S1 is not less than 35%. When the concentration of the clay slurry is less than 35%, the consolidation effect of the clay slurry is poor and the efficiency is low. Therefore, the concentration of the clay slurry is controlled to be not less than 35%, so that the clay slurry has good consolidation effect and high efficiency on the dry beach surface 30, the clay slurry has good consolidation effect, and the clay layer on the dry beach surface 30 is stable and is not easy to run off.
Other configurations and operations of the closed tailing pond reclamation system 100 and the closed tailing pond reclamation method according to the embodiment of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (7)
1. A closed tailing pond reclamation system is characterized by comprising:
dry beach surface;
a clarification zone located in a reservoir area catchment area downstream of the dry beach face;
the slurry making equipment is used for making clay used for closed reclamation of the tailing pond into clay slurry, and comprises a slurry making pool, a liquid adding device for adding liquid into the slurry making pool and a stirrer, wherein the stirrer is arranged in the slurry making pool;
and the conveying equipment is connected with the slurry making equipment, and the conveying equipment is connected with the slurry making pool and is used for hydraulically filling the clay slurry to the dry beach surface.
2. The tailings silo reclamation system of claim 1, wherein the pulping apparatus further comprises:
and the nutrient medium adding device is used for adding nutrient medium into the pulping tank.
3. The tailings pond reclamation system of claim 2, wherein if the tailings are acidic, the nutrient medium is alkaline;
if the tailings are alkaline, the nutrient medium is acidic.
4. The tailings pond closed reclamation system of any one of claims 1 to 3, wherein the transport apparatus comprises:
the conveying main pipe is connected with the pulp making equipment;
and the conveying branch pipes are connected with the conveying main pipe.
5. The tailings pond reclamation system of claim 4, wherein the plurality of transport branch pipes are evenly distributed on the dry beach face.
6. A closed tailing pond reclamation method, which is characterized by adopting the closed tailing pond reclamation system according to any one of claims 1 to 5, and comprises the following steps:
s1: preparing clay into clay slurry;
s2: and hydraulically filling the clay slurry in the slurry making tank to a dry beach surface.
7. The tailings silo reclamation method of claim 6, wherein in step S1, a nutrient medium is added to the clay,
if the tailings are acidic, the nutrient medium is alkaline;
if the tailings are alkaline, the nutrient medium is acidic.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110144907B (en) * | 2019-05-16 | 2020-04-24 | 杭州绿农环境工程有限公司 | Abandoned mine pit reclamation method based on building residue soil filling engineering |
| CN114846964B (en) * | 2022-06-09 | 2023-10-20 | 中钢集团马鞍山矿山研究总院股份有限公司 | Method for reclamation of closed tailings pond of large pit type |
| CN114855761B (en) * | 2022-06-09 | 2024-05-17 | 中钢集团马鞍山矿山研究总院股份有限公司 | Wet type tailing pond closed reclamation structure and construction method thereof |
| CN114830882B (en) * | 2022-06-09 | 2023-10-31 | 中钢集团马鞍山矿山研究总院股份有限公司 | Middle and small pit type tailing pond closed-pond reclamation device and method |
| CN114855762B (en) * | 2022-06-09 | 2024-05-17 | 中钢集团马鞍山矿山研究总院股份有限公司 | Device and method for closing and sealing tailings pond |
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| CN202936802U (en) * | 2012-10-19 | 2013-05-15 | 中钢集团马鞍山矿山研究院有限公司 | Seepage drain device for beach face of closed tailing pond |
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| CN103255762A (en) * | 2013-05-10 | 2013-08-21 | 中国矿业大学(北京) | Method of leading Yellow River silt to fill reclamation coal mining subsidence land |
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