CN109499229B - Dust suppression spraying agent for tailing pond and application method thereof - Google Patents
Dust suppression spraying agent for tailing pond and application method thereof Download PDFInfo
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- CN109499229B CN109499229B CN201811548821.3A CN201811548821A CN109499229B CN 109499229 B CN109499229 B CN 109499229B CN 201811548821 A CN201811548821 A CN 201811548821A CN 109499229 B CN109499229 B CN 109499229B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/22—Materials not provided for elsewhere for dust-laying or dust-absorbing
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Abstract
The invention discloses a dust suppression spraying agent for a tailing pond, which comprises 20-40 parts of polyvinyl alcohol, 5-10 parts of poly (arylene ether nitrile), 2-5 parts of polyvalent metal salt, 1-3 parts of organic cross-linking agent, 40-70 parts of starch and 500 parts of water, and the using method comprises the steps of preparing AB solution, spraying wheat straw, spraying the solution, rolling and curing and the like. The invention has the beneficial effects that: the polyvinyl alcohol in the dust suppression spraying agent can be chemically crosslinked under the action of the organic crosslinking agent, the poly (arylene ether nitrile) and the multivalent metal salt can be complexed into a net shape, the starch can further enhance the combination of all components, the integrity is strong after the poly (arylene ether nitrile) is attached to the wheat straws, the adhesion force of the surface part can be increased when the poly (arylene ether nitrile) penetrates into the holes, the dry beach area of a tailing pond can be covered for a long time after the poly (arylene ether nitrile) is repeatedly rolled, and the dust suppression spraying agent has a good dust prevention and sand prevention effect.
Description
Technical Field
The invention relates to the field of mineral dust treatment, in particular to a dust suppression spraying agent for a tailing pond and a using method thereof.
Background
Tailings pond management is an important component of daily mine management. The dust in the tailing pond, especially the dust in the tailing sand in dry beach areas of the tailing pond in strong wind weather in spring and autumn, causes serious pollution and harm to mines and the surrounding environment. With the increasing importance of the country on environmental protection, the environmental protection policy becomes stricter, and dust raising of the tailing pond brings environmental protection risks and social benefit risks of increasing the production and operation costs of enterprises. Thus, protection against dust emission in dry beach areas of tailings ponds is a problem that each mine must face.
The traditional windproof and dust suppression measures of the tailing pond mainly comprise a plurality of methods such as spraying water, covering soil, paving straw curtains, spraying curing cementing agent and the like.
The spraying water sprinkling dust suppression method has faster dust suppression speed, but due to the self characteristics of the tailings, the tailing has good sparse water permeability, the surface layer can be rapidly dried after being temporarily wetted, and the dust suppression effect is poor. The long-term spraying and sprinkling can also easily cause the rise of the saturation line of the tailing pond to a certain degree, and the safety of a dam body is influenced. Spraying needs sprinkler such as connecting tube, shower nozzle, and to the higher tailing storehouse of grade, the length and width distance is big, and the shower nozzle point is many, and the pipeline distance is long, and pressure is not enough to spray to the management degree of difficulty is great, and the cost is higher.
The covering and dust suppression is a more classical dust suppression method, and a soil layer with the thickness of about 2-3cm is covered on the mud flat surface of the tailings by manually scattering soil or covering soil with a forklift to cover small-particle tailings. The method consumes a large amount of manpower and material resources, the number of people for manually spreading soil organizations is large, the labor intensity is high, the soil spreading by a forklift is not uniform, and the use and maintenance cost is high. In addition, with the improvement of environmental protection requirements, the earthing dust suppression mode faces many problems, such as large covering soil consumption and less soil taking place source. Transportation cost, labor cost and other various expenses, the cost of each square of soil is about 20 yuan, and the cost is higher. Meanwhile, the soil covering time period is long, dust suppression cannot be completed quickly, and the dust suppression effect is poor. The large amount of soil also occupies effective storage capacity, so that the scarce tailing pond resources become more tense.
Straw mat soil covering is also a common soil covering method. The straw mat soil covering specifically needs to spread and spread the bundled (or rolled) straw mat in turn by manpower and cover the surface of the dry tailings. The method is similar to soil covering and dust suppression, needs a large amount of manpower and material resources, is high in labor intensity, is high in straw mat manufacturing cost, is high in cost of 2.8 yuan/per roll, is easy to rot, has the characteristic of disposability, and is almost ineffective when being moved again after being blown by wind and sun.
The method for suppressing dust by cementing the surface layer of the tailing with the curing agent is a dust suppression method emerging in recent years, and the surface layer of the tailing is sprayed with the curing agent with different formulas according to the analysis of the physicochemical properties of ores, so that a hardened shell with certain strength is formed on the surface layer of the tailing, and the dust suppression effect is achieved. In laboratory research, the method has the advantages of simple process, good dust suppression effect, high compressive strength of 247kPa, and high water resistance, freeze-thaw resistance and wind blowing resistance. However, in the practical application process, equipment such as a stirrer, a dry concrete sprayer, an air compressor and the like is needed for large-scale treatment of the surface of the tailing pond, and the formula of the curing agent needs to be determined according to the storage time of the dry beach, so that the cost factor is greatly influenced, and the economic rationality is greatly influenced.
Disclosure of Invention
The invention provides a dust suppression spraying agent for a tailing pond and a using method thereof, aiming at the problems of poor dust suppression effect, high consumption and high cost of the existing windproof dust suppression measures for the tailing pond.
The technical scheme for solving the technical problems is as follows: the dust suppression spraying agent for the tailing pond is characterized by comprising the following components in parts by weight: 20-40 parts of polyvinyl alcohol, 5-10 parts of poly (arylene ether nitrile), 2-5 parts of polyvalent metal salt, 1-3 parts of organic cross-linking agent, 40-70 parts of starch and 500 parts of water 300-.
Wherein the polyvalent metal salt is FeCl3、AlCl3Or ZnCl2The organic cross-linking agent is one of methyl orthosilicate, methacrylic acid or p-toluenesulfonic acid.
The invention also discloses a use method of the dust suppression spraying agent in a dry beach area of a tailing pond, which comprises the following steps:
1) weighing the components according to the parts by weight, dividing water into 2 parts, dissolving polyvinyl alcohol and poly (arylene ether nitrile) in one part of water to prepare a solution A, dissolving polyvalent metal salt, an organic cross-linking agent and starch in the other part of water to prepare a solution B, and respectively filling 2 parts of solution into a spraying machine;
2) cutting wheat straws to 3-5cm long, soaking for 3-5h, taking out, and loading into a material spraying machine;
3) sweeping the dry beach area of the tailing pond, spraying water for drenching, and rolling in a drenching area by using a roller with convex columns on the surface so that circular holes are uniformly distributed in the drenching area;
4) uniformly spraying wheat straws in a spraying area by using a sprayer;
5) spraying the solution A and the solution B in the same volume in a spraying area by a spraying machine;
6) and repeatedly rolling the sprayed area for 3-5 times by using a round roller after 3-5 hours.
In order to give consideration to the optimization of dust prevention and sand prevention effects and economic expenditure in a dry beach area of a tailing pond, the method comprises the following specific process control: the density of the circular holes is 4000-2The spraying amount of the wheat straw is 500-1000g/m2The spraying amount of the dust suppression spraying agent is 2-5kg/m2。
The invention has the beneficial effects that: the polyvinyl alcohol in the dust suppression spraying agent can be chemically crosslinked under the action of the organic crosslinking agent, the poly (arylene ether nitrile) and the multivalent metal salt can be complexed, the starch can further enhance the combination of all components, the integrity is strong after the polyvinyl alcohol is attached to wheat straws, the adhesion force of the surface part can be increased when the polyvinyl alcohol permeates into holes, the polyvinyl alcohol can cover a dry beach area of a tailing pond for a long time after being repeatedly rolled, and the dust suppression spraying agent has a good dust prevention and sand prevention effect. Compared with the existing single curing agent, the invention adopts a mode of combining chemistry and physics, and has the advantages of simple components, less auxiliary equipment, convenient operation, good dust and sand prevention effect and low cost.
Detailed Description
The present invention is described below with reference to examples, which are provided for illustration only and are not intended to limit the scope of the present invention.
Example 1
A dust suppression spraying agent for a tailing pond comprises the following components in parts by weight: polyvinyl alcohol 20 parts, polyaryl ether nitrile 5 parts, FeCl32 parts of methyl orthosilicate, 40 parts of starch and 300 parts of water.
The steps of using the embodiment in the dry beach area of the tailing pond are as follows:
1) weighing the components according to the parts by weight, dividing water into 2 parts, dissolving polyvinyl alcohol and poly (arylene ether nitrile) in one part of water to prepare a solution A, dissolving polyvalent metal salt, an organic cross-linking agent and starch in the other part of water to prepare a solution B, and respectively filling 2 parts of solution into a spraying machine;
2) cutting the wheat straw to 5cm long, soaking for 5h, taking out, and loading into a material spraying machine;
3) sweeping the dry beach area of the tailing pond, spraying water for drenching, rolling in the drenching area by using a roller with convex columns on the surface,uniformly distributing round holes in the wet area, and controlling the density of the round holes to be 9000 holes/m3；
4) Uniformly spraying wheat straws in a spraying area by a sprayer, wherein the spraying amount is 1000g/m2；
5) Spraying the solution A and the solution B in the same volume in a spraying area by a spraying machine, wherein the spraying amount is 2kg/m2；
6) After 3h, the sprayed area was repeatedly rolled with a round roller for 5 times.
Example 2
A dust suppression spraying agent for a tailing pond comprises the following components in parts by weight: 30 parts of polyvinyl alcohol, 8 parts of poly (arylene ether nitrile) and AlCl34 parts of methacrylic acid, 2 parts of starch and 400 parts of water.
The steps of using the embodiment in the dry beach area of the tailing pond are as follows:
1) weighing the components according to the parts by weight, dividing water into 2 parts, dissolving polyvinyl alcohol and poly (arylene ether nitrile) in one part of water to prepare a solution A, dissolving polyvalent metal salt, an organic cross-linking agent and starch in the other part of water to prepare a solution B, and respectively filling 2 parts of solution into a spraying machine;
2) cutting wheat straws to 4cm long, soaking for 4h, taking out, and loading into a material spraying machine;
3) sweeping dry beach area of tailing pond, spraying water for drenching, rolling in drenching area with roller with convex column on surface to make circular holes uniformly distributed in drenching area, and controlling density of circular holes to 6000/m2；
4) Uniformly spraying the wheat straws in a spraying area by a sprayer, wherein the spraying amount is 750g/m2；
5) Spraying the solution A and the solution B in the same volume in a spraying area by a spraying machine, wherein the spraying amount is 3.5kg/m2；
6) After 4h, the sprayed area was repeatedly rolled with a round roller for 4 times.
Example 3
A dust suppression spraying agent for a tailing pond comprises the following components in parts by weight: 40 parts of polyvinyl alcohol, 10 parts of poly (arylene ether nitrile) and ZnCl25 parts of p-toluenesulfonic acid, 3 parts of starch70 parts of water and 500 parts of water.
The steps of using the embodiment in the dry beach area of the tailing pond are as follows:
1) weighing the components according to the parts by weight, dividing water into 2 parts, dissolving polyvinyl alcohol and poly (arylene ether nitrile) in one part of water to prepare a solution A, dissolving polyvalent metal salt, an organic cross-linking agent and starch in the other part of water to prepare a solution B, and respectively filling 2 parts of solution into a spraying machine;
2) cutting wheat straws to 3cm long, soaking for 3h, taking out, and loading into a material spraying machine;
3) sweeping dry beach area of tailing pond, spraying water for drenching, rolling in drenching area with roller with convex column on surface to make circular holes uniformly distributed in drenching area, and controlling density of circular holes to 4000/m2；
4) Uniformly spraying wheat straws in a spraying area by a sprayer, wherein the spraying amount is 500g/m2；
5) Spraying the solution A and the solution B in the same volume in a spraying area by a spraying machine, wherein the spraying amount is 5kg/m2；
6) After 5h, the sprayed area was repeatedly rolled 3 times with a round roller.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. A use method of a dust suppression spraying agent for a tailing pond is characterized in that,
the dust suppression spraying agent for the tailings pond comprises the following components in parts by weight: 20-40 parts of polyvinyl alcohol, 5-10 parts of poly (arylene ether nitrile), 2-5 parts of polyvalent metal salt, 1-3 parts of organic cross-linking agent, 40-70 parts of starch and 500 parts of water 300-;
the method comprises the following steps:
1) weighing the components according to the parts by weight, dividing water into 2 parts, dissolving polyvinyl alcohol and poly (arylene ether nitrile) in one part of water to prepare a solution A, dissolving polyvalent metal salt, an organic cross-linking agent and starch in the other part of water to prepare a solution B, and respectively filling 2 parts of solution into a spraying machine;
2) cutting wheat straws to 3-5cm long, soaking for 3-5h, taking out, and loading into a material spraying machine;
3) sweeping the dry beach area of the tailing pond, spraying water for drenching, and rolling in a drenching area by using a roller with convex columns on the surface so that circular holes are uniformly distributed in the drenching area;
4) uniformly spraying wheat straws in a spraying area by using a sprayer;
5) spraying the solution A and the solution B in the same volume in a spraying area by a spraying machine;
6) and repeatedly rolling the sprayed area for 3-5 times by using a round roller after 3-5 hours.
2. The method of claim 1, wherein the multivalent metal salt is FeCl3、AlCl3Or ZnCl2One kind of (1).
3. The method of claim 1, wherein the organic cross-linking agent is one of methyl orthosilicate, methacrylic acid, or p-toluenesulfonic acid.
4. The method as claimed in claim 1, wherein the circular hole density is 4000-2。
5. The method as claimed in claim 1, wherein the spraying amount of the wheat straw is 500-1000g/m2。
6. The method of claim 1, wherein the dust suppression spray is sprayed in an amount of 2 to 5kg/m2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811548821.3A CN109499229B (en) | 2018-12-18 | 2018-12-18 | Dust suppression spraying agent for tailing pond and application method thereof |
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| CN201811548821.3A CN109499229B (en) | 2018-12-18 | 2018-12-18 | Dust suppression spraying agent for tailing pond and application method thereof |
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| CN109499229B true CN109499229B (en) | 2021-04-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0411981A (en) * | 1990-04-27 | 1992-01-16 | Kaken Kogyo Kk | Contaminant removing method and agent |
| US20070135561A1 (en) * | 2005-12-08 | 2007-06-14 | Christian Rath | Method of dust abatement |
| CN102153991B (en) * | 2010-06-21 | 2013-06-05 | 北京金元易生态工程技术中心 | High-efficiency dust suppressant and preparation method thereof |
| CN103320094B (en) * | 2013-06-28 | 2015-07-01 | 陕西煤业化工技术研究院有限责任公司 | Solid chemical dust suppression agent and preparation method thereof |
| AP2016009638A0 (en) * | 2014-07-21 | 2016-12-31 | Xyleco Inc | Processing biomass |
| CN106833528B (en) * | 2017-02-07 | 2019-03-08 | 鄂尔多斯市贺泰汽车运输有限责任公司 | Starch dust suppressant and preparation method thereof |
| CN107746701B (en) * | 2017-10-21 | 2020-05-26 | 山西蓝邦环保科技有限公司 | Preparation method of special dust suppressant for soil surface |
| CN107828381B (en) * | 2017-11-16 | 2021-06-15 | 周长胜 | Preparation method of natural environment-friendly surface dust suppression curing agent |
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