CN115925354A - Application of graphite tailing condensate in erosion ditch treatment and waste pit landfill - Google Patents
Application of graphite tailing condensate in erosion ditch treatment and waste pit landfill Download PDFInfo
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- CN115925354A CN115925354A CN202211470573.1A CN202211470573A CN115925354A CN 115925354 A CN115925354 A CN 115925354A CN 202211470573 A CN202211470573 A CN 202211470573A CN 115925354 A CN115925354 A CN 115925354A
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- graphite
- cement
- waste
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 110
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 110
- 239000010439 graphite Substances 0.000 title claims abstract description 110
- 239000002699 waste material Substances 0.000 title claims abstract description 35
- 230000003628 erosive effect Effects 0.000 title claims abstract description 11
- 239000004568 cement Substances 0.000 claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 17
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 239000011398 Portland cement Substances 0.000 claims description 25
- 239000002131 composite material Substances 0.000 claims description 12
- 239000002994 raw material Substances 0.000 claims description 6
- 239000004744 fabric Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 2
- 238000005067 remediation Methods 0.000 claims 1
- 238000002386 leaching Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 5
- 238000003756 stirring Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 230000008595 infiltration Effects 0.000 abstract 1
- 238000001764 infiltration Methods 0.000 abstract 1
- 238000007493 shaping process Methods 0.000 abstract 1
- 239000002910 solid waste Substances 0.000 description 7
- 238000011049 filling Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000035699 permeability Effects 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 108010053481 Antifreeze Proteins Proteins 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000002528 anti-freeze Effects 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- 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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- Processing Of Solid Wastes (AREA)
Abstract
The application provides an application of a graphite tailing condensate in erosion ditch treatment and waste pit landfill, and a treatment method of the graphite tailing waste comprises the step of uniformly mixing the graphite tailing waste, cement and water to prepare the graphite tailing condensate. This application drops into graphite tailings, cement and water according to the mix proportion of certain quality and stirs in the mixer, and the machine vibrates the postcure shaping and makes. The cured graphite tailings prepared by the method maximize the utilization degree of wastes on the premise of increasing the doping amount of the graphite tailings as much as possible, so that the aim of changing waste into valuables is fulfilled. All properties of the cured material after treatment can fully meet the index requirements of infiltration, leaching, pressure intensity, environmental protection and the like in erosion gully treatment and waste pit landfill.
Description
Technical Field
The invention relates to the field of recycling of solid wastes, in particular to a method for utilizing a graphite tailing condensate in erosion gully treatment and waste pit landfill.
Background
From literature data, scientific researchers describe the theory and application research of graphite tailing treatment, and the technical progress of recycling of the graphite tailing in China is promoted to a certain extent. However, in the conventional method, graphite tailings are used for replacing fine aggregates in concrete, so that the utilization rate of the tailings is extremely low, and the requirement target of large-batch consumption of the graphite tailings cannot be met.
Disclosure of Invention
The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.
Graphite tailings are a large amount of solid waste generated during the graphite mining process.
The application provides a treatment method of graphite tailing waste, which comprises the following steps:
and uniformly mixing the graphite tailing waste, cement and water to prepare a graphite tailing condensate.
In one embodiment provided herein, the graphite tailings waste is ground to 80-130 mesh.
In one embodiment provided herein, the weight ratio of the graphite tailings waste to the cement is (1800 to 3000): (75 to 1000).
In one embodiment provided herein, the weight ratio of cement to water is (75 to 1000): 60 to 960.
In one embodiment provided herein, the cement is any one or more of 32.5 portland cement, 42.5 portland cement, 52.5 portland cement, 32.5 composite portland cement, 42.5 composite portland cement, and 52.5 composite portland cement.
In one embodiment provided herein, the graphite tailing waste, cement and water are mixed uniformly to prepare a graphite tailing cured product without using other additives.
In yet another aspect, the present application provides a cured graphite tailings, wherein the raw materials of the cured graphite tailings comprise graphite tailings waste, cement, and water.
In one embodiment provided herein, the fineness of the graphite tailing waste is 80-130 mesh.
In one embodiment provided herein, the weight ratio of the graphite tailings waste to the cement is (1800 to 3000): (75 to 1000).
In one embodiment provided herein, the weight ratio of cement to water is (75.269-1000): (60-960).
In one embodiment provided herein, the cement is any one or more of 32.5 portland cement, 42.5 portland cement, 52.5 portland cement, 32.5 composite portland cement, 42.5 composite portland cement, and 52.5 composite portland cement.
In another aspect, the present application provides a method for preparing the cured graphite tailings, the method comprising: and uniformly mixing the graphite tailing waste, cement and water to prepare a graphite tailing condensate.
In one embodiment provided herein, the method for preparing a cured graphite tailing further includes:
uniformly mixing the graphite tailing waste, cement and water, vibrating and compacting in a mould, naturally curing for 22-26 h under wet film cloth with the temperature of 10-14 ℃ and the humidity of 90-95%, and then performing steam curing for 28d under the temperature of 18-23 ℃ and the humidity of 95-100% to obtain the graphite tailing condensate.
In another aspect, the application provides the application of the graphite tailing condensate erosion ditch treatment and the waste pit landfill.
The method effectively solves the problems of running risk and potential safety hazard caused by accumulation and storage of a large amount of graphite tailings in the tailing pond, thoroughly eradicates environmental pollution phenomena such as dust raising weather caused by tailing powder, and can meet the requirements of repairing required landfill materials such as ditches, ponds, pits, holes and ponds formed by geological changes for many years. The technical path of the application is to greatly improve the doping amount and the utilization rate of the graphite tailings, and a series of indoor scientific verification and outdoor environment monitoring prove that various performances of a cured product formed after curing are safe, effective, nontoxic and harmless, and the requirements of relevant regulations of application scenes are comprehensively met. Particularly, the graphite tailings are applied to erosion gully treatment and landfill of abandoned pits after being cured, and vegetation damage and resource waste caused by traditional landfill measures such as taking earth and stones can be effectively reduced.
The technical scheme provided by the application is different from the related application of the conventional graphite tailings, does not contain any coarse aggregate macadam, does not replace a small amount of fine aggregate in concrete, and fills the graphite tailings in the concrete as large as possible on the premise of meeting the requirements of mechanical properties and environmental protection indexes, thereby comprehensively improving the filling rate of the graphite tailings. Various performance indexes of the cured graphite tailings obtained by curing the graphite tailings can meet the standard requirements of application scenes such as erosion gully treatment, waste pit landfill and the like, harmful substances in the cured graphite tailings subjected to curing are all locked, the seepage concentration content is almost zero, and the method is essentially different from the existing scheme for replacing fine aggregates in concrete. Therefore, the aims of eliminating potential safety hazards, changing waste into valuable, regenerating resources and the like are achieved, social benefits and economic benefits are very obvious, and the method has a promoting effect on promoting the healthy and sustainable development of the graphite industry and the coordination progress of regional economy and society.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. Other advantages of the present application may be realized and attained by the invention in its aspects as described in the specification.
Drawings
The accompanying drawings are included to provide an understanding of the present disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the examples serve to explain the principles of the disclosure and not to limit the disclosure.
Fig. 1 is a statistical graph of 28-balance compressive strength of cured graphite tailings obtained in examples 1 to 7 of the present application.
Detailed Description
The following detailed description is provided to further clarify the objects, technical solutions and advantages of the present application. In the present application, the features of the embodiments may be arbitrarily combined with each other without conflict.
Examples 1 to 7 the preparation method of the graphite tailing cured product includes the following steps:
step one, weighing 80-130 mesh graphite tailings (which are prepared by grinding graphite tailings waste), 42.5# ordinary portland cement and water as raw materials according to the mass parts of the corresponding embodiments.
And step two, adding the graphite tailings and the cement into the stirrer in sequence, and adding water into the stirrer after the graphite tailings and the cement are subjected to primary dry stirring.
And step three, uniformly stirring and mixing the raw materials in the step two, filling the raw materials into a mold, demolding the raw materials, and performing curing treatment to obtain the graphite tailing condensate test block.
According to the national standard GBJ107-87, a test piece 150mm is manufactured, the graphite tailings, cement and water are uniformly mixed and then vibrated and compacted in a die, natural curing is carried out for 22h to 26h under wet membrane cloth with the temperature of 10 ℃ to 14 ℃ and the humidity of 90 percent to 95 percent, then steam curing is carried out for 28d under the temperature of 18 ℃ to 23 ℃ and the humidity of 95 percent to 100 percent, and then the test pieces of 28d of the examples 1 to 7 are respectively subjected to compression strength detection, wherein the detection result is shown in figure 1.
Example 1: 3238 parts of cement, 3238 parts of zxft 3238 parts of water, 3262 parts of zxft 3262 parts of graphite tailings, and the mixing amount of the graphite tailings is about 71%. The cured graphite tailings obtained in this example were recorded as example 1, and the average compressive strength of the cured graphite tailings was in the range of 5MPa to 7MPa.
Example 2: 5363 portions of cement 388.889 portions, 3242 portions of water 311.111 portions, 1800 portions of graphite tailings, and 72 percent of graphite tailing mixing amount. The cured graphite tailings obtained in this example were recorded as example 2, and the average compressive strength of 28d was in the range of 4MPa to 5.5MPa.
Example 3: 3238 parts of cement, 3238 parts of zxft 3238 parts of water, 3262 parts of zxft 3262 parts of graphite tailings, and the mixing amount of the graphite tailings is 77%. The cured graphite tailings obtained in this example were recorded as example 3, and the average compressive strength of the cured graphite tailings in example 28d was in the range of 2MPa to 3.5MPa.
Example 4: 250 parts of cement, 200 parts of water, 1800 parts of graphite tailings and 80% of graphite tailings. The cured graphite tailings obtained in this example were recorded as example 4, and the average compressive strength of the cured graphite tailings was in the range of 3MPa to 4.5MPa.
Example 5: 3238 parts of cement, 3238 parts of zxft, 3262 parts of water, 1800 parts of graphite tailings and 85% of graphite tailings. The cured graphite tailings obtained in this example were recorded as example 5, and the 28d average compressive strength ranged from 0.5MPa to 2MPa.
Example 6: 111.11 parts of cement, 88.88 parts of water, 1800 parts of graphite tailings and 90% of graphite tailings. The cured graphite tailings obtained in this example were recorded as example 6, and the average compressive strength of the cured graphite tailings was in the range of 0.1MPa to 0.5MPa.
Example 7: 3238 parts of cement 75.269, 3262 parts of water 60.215, 1800 parts of graphite tailings, and 93% of graphite tailings, wherein the cured graphite tailings prepared in the embodiment is recorded as example 7, and the 28d average compressive strength ranges from 0.05MPa to 0.2MPa.
As can be seen from the 28d average compressive strength of examples 1 to 7, the strength of the cured graphite tailings gradually decreases with the increase of the doping amount of the graphite tailings, and when the doping amount reaches 80%, the strength rises and then continues to decrease; when the content reaches 93%, the basic mechanical property is still remained.
The compressive strength of the graphite tailing condensate provided by the application can be 0.05MPa to 7MPa.
For example, a plurality of kinds of cements or any one kind of cement may be selected in this embodiment, and similar effects to those in embodiments 1 to 7 are obtained when different cements are used.
The graphite tailings solidified materials prepared in examples 1 to 7 were subjected to leaching tests according to the national standard "horizontal oscillation method for leaching toxicity from solid waste" HJ557-2010, and the results are shown in table 1.
Table 1:
as can be seen from Table 1, in the leaching experiment of the original graphite tailings, although the graphite tailings have low contents of heavy metals such as total mercury, total chromium and total arsenic, the graphite tailings belong to the class I general industrial solid wastes according to the highest-concentration discharge requirement of the first pollutant of the national Standard for Integrated wastewater discharge Standard GB 8978-1996. After a cementing material is added into graphite tailings to form a cured product, the saturated permeability coefficient of the cured product after treatment is less than 1.0 multiplied by 10 -5 cm/s, meets the standard requirement of the permeability coefficient around a class I general industrial solid waste landfill site of the national pollution control Standard for general Industrial solid waste storage and disposal sites GB18599-2020, and meets and realizes the requirement of general solid waste for the graphite tailing condensate to completely enter the class I site for application.
The application provides a graphite tailings condensate makes harmful microelement in the graphite tailings fix or contain wherein, realizes high-efficient big batch innocent treatment, and the final synthesis has excellent compatibilization ratio, the novel graphite tailings condensate of characteristics such as good impermeability, mechanicalness, anti leaching nature, anti freeze thawing resistance. The high filling rate, low permeability and low leaching rate are characterized by being the best product for filling materials for erosion gully treatment and waste pit landfill. Particularly, the seepage content of hazardous substances is almost zero, and in the application scenes of field erosion gully treatment and landfill treatment of abandoned pits, each performance index meets the relevant specified requirements, thereby providing strong and favorable theoretical support for large-area popularization and application in the later period, realizing 'stone returning by stone', and having remarkable economic and social benefits.
Claims (10)
1. The method for treating the graphite tailing waste is characterized by comprising the following steps
And uniformly mixing the graphite tailing waste, cement and water to prepare a graphite tailing condensate.
2. The method of claim 1, wherein the graphite tailings waste is ground to a size of 80 mesh to 130 mesh.
3. The method of claim 1, wherein the weight ratio of the graphite tailings waste to the cement is (1800 to 3000): (75 to 1000);
optionally, the weight ratio of cement to water is (75 to 1000): (60 to 960).
4. A method according to any one of claims 1 to 3, wherein the cement is selected from any one or more of 32.5 portland cement, 42.5 portland cement, 52.5 portland cement, 32.5 composite portland cement, 42.5 composite portland cement, and 52.5 composite portland cement.
5. The method of any one of claims 1 to 3, wherein the graphite tailing waste, cement and water are mixed uniformly to prepare a graphite tailing solidified substance.
6. The graphite tailing cured product is characterized in that raw materials of the graphite tailing cured product comprise graphite tailing waste, cement and water.
7. The cured graphite tailing of claim 6, wherein the fineness of the graphite tailing waste is 80-130 mesh;
optionally, the weight ratio of the graphite tailings waste to the cement is (1800 to 3000): (75 to 1000);
optionally, the weight ratio of cement to water is (75 to 1000): (60 to 960);
optionally, the cement is selected from any one or more of 32.5 portland cement, 42.5 portland cement, 52.5 portland cement, 32.5 composite portland cement, 42.5 composite portland cement, and 52.5 composite portland cement.
8. The method for producing a cured graphite tailing according to claim 6 or 7, comprising: and uniformly mixing the graphite tailing waste, cement and water to prepare a graphite tailing condensate.
9. The method for producing a cured graphite tailing according to claim 8, further comprising:
uniformly mixing the graphite tailing waste, cement and water, vibrating and compacting in a mould, naturally curing for 22-26 h under wet film cloth with the temperature of 10-14 ℃ and the humidity of 90-95%, and then performing steam curing for 28d under the temperature of 18-23 ℃ and the humidity of 95-100% to obtain the graphite tailing condensate.
10. Use of the cured graphite tailings as claimed in claim 6 or 7 in erosion gully remediation or landfill disposal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211470573.1A CN115925354A (en) | 2022-11-23 | 2022-11-23 | Application of graphite tailing condensate in erosion ditch treatment and waste pit landfill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211470573.1A CN115925354A (en) | 2022-11-23 | 2022-11-23 | Application of graphite tailing condensate in erosion ditch treatment and waste pit landfill |
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| CN115925354A true CN115925354A (en) | 2023-04-07 |
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| CN202211470573.1A Pending CN115925354A (en) | 2022-11-23 | 2022-11-23 | Application of graphite tailing condensate in erosion ditch treatment and waste pit landfill |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101798204A (en) * | 2010-03-01 | 2010-08-11 | 广州大学 | Tailing graphite material and manufacturing method thereof |
| CN106587789A (en) * | 2017-01-05 | 2017-04-26 | 陈剑 | Multifunctional and novel filling material adopting iron ore whole tailings |
| CN107032674A (en) * | 2017-04-11 | 2017-08-11 | 中蓝连海设计研究院 | A kind of Total tailing consolidated fill slurry and preparation method thereof |
| CN107963850A (en) * | 2017-09-14 | 2018-04-27 | 杨智航 | A kind of cracking resistance high heat conduction mortar and its preparation method and application |
| CN108947416A (en) * | 2018-10-24 | 2018-12-07 | 黑龙江大学 | Graphite tailing concrete mix and preparation method thereof |
| CN109575443A (en) * | 2018-12-24 | 2019-04-05 | 中国地质大学（北京） | A kind of graphite tailing composite material and preparation method |
| CN111153641A (en) * | 2020-01-16 | 2020-05-15 | 山东领军新材料科技有限公司 | Method for preparing high-strength heat-insulation building block from graphite tailings |
-
2022
- 2022-11-23 CN CN202211470573.1A patent/CN115925354A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101798204A (en) * | 2010-03-01 | 2010-08-11 | 广州大学 | Tailing graphite material and manufacturing method thereof |
| CN106587789A (en) * | 2017-01-05 | 2017-04-26 | 陈剑 | Multifunctional and novel filling material adopting iron ore whole tailings |
| CN107032674A (en) * | 2017-04-11 | 2017-08-11 | 中蓝连海设计研究院 | A kind of Total tailing consolidated fill slurry and preparation method thereof |
| CN107963850A (en) * | 2017-09-14 | 2018-04-27 | 杨智航 | A kind of cracking resistance high heat conduction mortar and its preparation method and application |
| CN108947416A (en) * | 2018-10-24 | 2018-12-07 | 黑龙江大学 | Graphite tailing concrete mix and preparation method thereof |
| CN109575443A (en) * | 2018-12-24 | 2019-04-05 | 中国地质大学（北京） | A kind of graphite tailing composite material and preparation method |
| CN111153641A (en) * | 2020-01-16 | 2020-05-15 | 山东领军新材料科技有限公司 | Method for preparing high-strength heat-insulation building block from graphite tailings |
Non-Patent Citations (1)
| Title |
|---|
| 房建果 等: "石墨尾矿用作高速公路底基层", 《山东大学学报》, vol. 33, no. 5, pages 562 - 567 * |
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Application publication date: 20230407 |