CN115925359A - Coal gangue base polymer green filling material and preparation method thereof - Google Patents
Coal gangue base polymer green filling material and preparation method thereof Download PDFInfo
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- CN115925359A CN115925359A CN202211533909.4A CN202211533909A CN115925359A CN 115925359 A CN115925359 A CN 115925359A CN 202211533909 A CN202211533909 A CN 202211533909A CN 115925359 A CN115925359 A CN 115925359A
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- 239000003245 coal Substances 0.000 title claims abstract description 68
- 239000000463 material Substances 0.000 title claims abstract description 56
- 238000011049 filling Methods 0.000 title claims abstract description 53
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 229920005601 base polymer Polymers 0.000 title claims abstract description 5
- 239000002245 particle Substances 0.000 claims abstract description 33
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 27
- 239000010881 fly ash Substances 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000011398 Portland cement Substances 0.000 claims abstract description 8
- 230000008719 thickening Effects 0.000 claims abstract description 7
- 229920000642 polymer Polymers 0.000 claims description 14
- 239000004115 Sodium Silicate Substances 0.000 claims description 11
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 11
- 229920002401 polyacrylamide Polymers 0.000 claims description 10
- -1 compound sodium silicate Chemical class 0.000 claims description 6
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 6
- JYIBXUUINYLWLR-UHFFFAOYSA-N aluminum;calcium;potassium;silicon;sodium;trihydrate Chemical compound O.O.O.[Na].[Al].[Si].[K].[Ca] JYIBXUUINYLWLR-UHFFFAOYSA-N 0.000 claims description 4
- 125000000129 anionic group Chemical group 0.000 claims description 4
- 229910001603 clinoptilolite Inorganic materials 0.000 claims description 4
- 229910052680 mordenite Inorganic materials 0.000 claims description 4
- 229910021487 silica fume Inorganic materials 0.000 claims description 4
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 3
- 230000001186 cumulative effect Effects 0.000 claims description 2
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 claims 2
- 239000004354 Hydroxyethyl cellulose Substances 0.000 claims 1
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 claims 1
- 239000003973 paint Substances 0.000 claims 1
- 239000003469 silicate cement Substances 0.000 claims 1
- 239000000203 mixture Substances 0.000 abstract description 6
- 238000002156 mixing Methods 0.000 abstract description 4
- 239000003607 modifier Substances 0.000 abstract description 3
- 239000004568 cement Substances 0.000 description 10
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 6
- 229910004298 SiO 2 Inorganic materials 0.000 description 6
- 239000011575 calcium Substances 0.000 description 6
- 230000015271 coagulation Effects 0.000 description 5
- 238000005345 coagulation Methods 0.000 description 5
- 238000005065 mining Methods 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000002910 solid waste Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 229910021536 Zeolite Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000010457 zeolite Substances 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 150000004645 aluminates Chemical class 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 229920000052 poly(p-xylylene) Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000013517 stratification Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- OBNDGIHQAIXEAO-UHFFFAOYSA-N [O].[Si] Chemical compound [O].[Si] OBNDGIHQAIXEAO-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 229920000876 geopolymer Polymers 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000003900 soil pollution Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides a coal gangue base polymer green filling material, which has the advantages of simple and easily obtained component composition, lower cost, good workability, easy configuration, good pumpability and higher mechanical strength, and comprises the following components: 4-8% of Portland cement, 15-25% of first-grade fly ash, 52-62% of coal gangue particles, 1-2% of an excitant, 1-2% of a thickening time control agent, 0.5-1% of an anti-layering agent and 15-18% of water. The preparation method of the green filling material comprises the steps of uniformly mixing portland cement, first-grade fly ash, coal gangue particles, an excitant, a pour point modifier and an anti-layering agent, and then uniformly mixing the mixture with water to obtain the green filling material.
Description
Technical Field
The invention relates to a coal gangue base polymer green filling material and a preparation method thereof, belonging to the field of mine filling materials.
Background
The coal gangue is solid waste residue discharged in the coal mining and washing processes, is one of the industrial solid wastes with the largest discharge amount in China at present, is accumulated and stockpiled by about 40 hundred million tons, occupies more than 1 million hectares of land, and is still sharply increased year by about one hundred million tons. The large amount of accumulated coal gangue not only occupies cultivated land, but also is very easy to be weathered and spontaneously combusted to cause atmosphere, soil and water pollution, even causes serious geological disasters, and causes extremely bad influence on ecological environment and social environment. And the utilization rate of the coal gangue is still less than 20 percent at present, and the disposal and effective utilization of the coal gangue becomes a problem to be solved urgently.
With the rapid development of the coal industry in China, the goaf area is continuously enlarged, and the problems of surface subsidence and 'third lower' coal compaction are more and more prominent. The advantages of the filling mining process in the aspects of preventing large-area ground surface subsidence, liberating 'under three' coal compaction, improving the recovery rate of resources, solving the problem of ground stacking of coal gangue and the like are increasingly highlighted. The application of coal gangue as a main component material to prepare paste for filling in mining areas becomes a hotspot of recent research, and the following problems mainly exist: firstly, the suspension property of coal gangue particles is not enough, the paste is layered, separated and not full of pipe flow, the flow loss is large during the process, and the pumping at an ultra-long distance is difficult; secondly, the paste has poor curing performance, low early strength and many internal defects; finally, the high cost restricts the large-scale popularization of the coal gangue paste, and the energy consumption cost of using the traditional cementing material to cement the coal gangue and exciting the strength of the coal gangue through grinding and calcining the coal gangue seriously restricts the forward development of coal mine filling.
Thermal power plants are arranged near a main coal mining area, and the coal ash resource is abundant. SiO in fly ash 2 、AL 2 0 3 The activated coal gangue cementing material is a potential cementing active ingredient, and the cementing property of the activated coal gangue cementing material can be excited to partially replace cement to serve as a cementing material in the cementing filling material, so that the use amount of the cement is reduced, the purpose of reducing the cost is achieved, the problem of coal gangue discharge is solved, the application and popularization of the coal mine cementing filling technology are promoted, and the green continuous development of the coal industry is realized.
Disclosure of Invention
Aiming at the problems of the existing filling material, the invention provides the coal gangue based polymer green filling material which is simple and easy to obtain in component composition, low in cost, good in workability, easy to configure, good in pumpability and high in mechanical strength, and realizes reasonable utilization of solid waste resources.
In order to achieve the purpose, the invention adopts the following technical scheme:
the coal gangue based polymer green filling material comprises the following components in percentage by mass: 4-8% of Portland cement, 15-25% of first-grade fly ash, 52-62% of coal gangue particles, 1-2% of an excitant, 1-2% of a thickening time control agent, 0.5-1% of an anti-layering agent and 15-18% of water.
Wherein the coal gangue particle size distribution D90 is:
| particle size range/mm | Divide into the remaining fraction/%) | Cumulative percent sifting/percent |
| 25-12.5 | 44.7 | 44.7 |
| 12.5-6.25 | 20.6 | 68.3 |
| 6.25-3.12 | 16.9 | 83.2 |
| 3.12-1.56 | 8.5 | 91.7 |
| 1.56-0.78 | 4.8 | 95.5 |
| 0.78-0.39 | 3.1 | 98.6 |
| 0.39-0.19 | 1.4 | 100 |
The excitant comprises, by mass, 10-15% of compound sodium silicate particles, 55-65% of 325-mesh mordenite and 25-30% of 325-mesh clinoptilolite. The chemical component in the zeolite powder composed of mordenite and clinoptilolite is SiO 2 (60％-75％)，Al 2 O 3 (10% -25%), soluble silicon (5% -12%), soluble aluminium (6% -12%).
The zeolite powder has large internal and external specific surface area and contains a large amount of active SiO 2 And Al 2 O 3 Ca (OH) released by hydration with cement 2 More C-S-H gel and hydrated aluminate are generated by reaction, so that the microstructure of the hardened cement paste is well improved, the viscosity of the concrete is increased, the segregation and bleeding in the concrete are eliminated, the total porosity of the concrete is greatly reduced, and the interface transition area between the cement paste and the aggregate is improved.
The compound sodium silicate particles are sodium silicate particles with the modulus of 1.0 and sodium silicate particles with the modulus of 3.5 according to the weight ratio of 1:1 percent by mass.
The thickening time control agent comprises 20-40% of silica fume and 60-80% of anhydrous gypsum according to mass percentage.
When cement is hydrated, gypsum can be mixed with C3A and Ca (OH) 2 The reaction is carried out to generate hydrated sulfur-aluminum-calcium (namely ettringite C3 A.3CaSO) which is insoluble in water 4 ·Ca(OH) 2 And a coating layer is formed on the surface of the C3A particles to prevent the C3A from being further hydrated, so that the solubility of aluminate in the solution is reduced, and the hydration product of the calcium aluminate cannot be separated. The silica fume is obtained by changing Ca in the system 2+ The content of (A) controls the progress of the reaction rate, and plays a role in adjusting coagulation. The combination of the two is beneficial to prolonging the pumpable time of the filling material and improving the pumpability of the filling material.
The anti-delamination agent is composed of HEC and polyacrylamide.
Polyacrylamide (PAM) is polymerized from acrylamide monomers, and can make suspended matters aggregate through electric neutralization to play a role in flocculation, and meanwhile, crosslinking substances are generated among polyacrylamide molecules, and the crosslinking substances are amorphous and have hydrophilicity and can be used as a surfactant to improve the flowing property of fluid. Specifically, the polyacrylamide in the embodiment of the present invention is designed into two types, which are respectively: anionic type, molecular weight is 600-800 ten thousand. Anionic type, molecular weight is 2000-2500 ten thousand.
The coal gangue base polymer green filling material provided by the invention uses coal gangue particles, cement, fly ash, an exciting agent, a pour point modifier, an anti-stratification agent and water as raw materials, and limits the mixture ratio of the raw materials, the particle size distribution of the coal gangue and the component components of the fly ash. Wherein, the fly ash belongs to a thermal power byproduct, has lower cost and is SiO 2 ，Al 2 O 3 High content of active component, active SiO under the action of excitant 2 ，Al 2 O 3 Produce hydraulic cementing materials such as C-S-H, C-A-H and the like, and provide cementing strength. The specific proportion of the excitant is a key core factor influencing the strength, the coagulation speed and the micro-expansion of the filling body, and SiO 2 ，Al 2 O 3 Silicon-oxygen tetrahedron [ SiO ] dissolved in liquid phase 4 ]Alumino tetrahedron [ AlO 4 ]The calcium vanadous stone (high-sulfur hydrated calcium sulphoaluminate, namely Aft) is formed by depolymerization and then hydrated crosslinking, so that the expansibility is improved, and the rapid cementing forming and early strength forming of the filling body are promoted. Meanwhile, a small amount of cement for supplementing and adding the mineral phase can effectively improve the comprehensive performance of the geopolymer filling material, improve the overall strength and durability of the solid filling body and improve the workability of the filling body. However, if the addition amount of cement is too large, on one hand, the cost is too high, and on the other hand, the alkalinity in the system is too high, which affects the excitation effect of the fly ash.
The coal gangue based green polymer filling material provided by the invention has the advantages of simple and easily-obtained raw material proportion, low cost, realization of resource utilization of a large amount of solid wastes, and excellent performances of good pumping property and high early strength. In addition, the filling material provided by the invention can also ensure that the coagulation phenomenon does not occur within 2 hours under the state of paste without external force, always maintain the fluidity and provide sufficient construction redundant time for the site. The formwork can be removed after 7 hours in the filling area, the construction efficiency is high, the method is very suitable for belt transportation of underground solid filling materials and goaf filling, the filling efficiency is effectively improved, the coal mine filling and mining period is shortened, and surface subsidence is controlled.
Detailed Description
Example 1
The coal gangue based polymer green filling material comprises the following components in percentage by mass: 325 percent of ordinary Portland cement, 20 percent of first-grade fly ash, 1 percent of excitant, 1 percent of thickening control agent, 0.8 thousandth of anti-layering agent (the total amount of cementing materials is about 28 percent), 56 percent of coal gangue particles and 16 percent of water.
Fly ash:
the main component of the fly ash is SiO 2 -50.24％，Al2O3-12.16％，CaO-15.48％，Fe 2 O 3 8.2 percent of-MgO-1.23, 1.14 percent of alkali and 6.55 percent of others.
Coal gangue:
the coal gangue particle size distribution D90 is as follows:
exciting agent:
the activator comprises 10% of compound sodium silicate particles, including 5% of sodium silicate particles (M = 1.0) and 5% of sodium silicate particles (M = 3.5);
90% is zeolite powder, including 38% clinoptilolite powder (325 mesh), 62% mordenite powder (325 mesh). It is composed ofThe chemical composition is 60% -SiO 2 ，20％-Al 2 O 3 11% -soluble silicon, 9% -soluble aluminum.
And (3) setting control agent: comprises 25 percent of silica fume and 75 percent of anhydrous gypsum according to mass percentage.
Anti-delamination agent: comprises 99% HEC and 1% polyacrylamide by mass. The polyacrylamide is anionic and has a molecular weight of 800 ten thousand.
325 common portland cement, first-grade fly ash, an excitant, a pour point modifier and an anti-stratification agent are collectively called as cementing materials. The preparation method of the coal gangue based polymer green filling material comprises the following steps: and uniformly mixing the cementing material and the coal gangue particles according to the mass percentage, and then uniformly mixing the mixture with water according to the mass percentage to obtain the coal gangue particle water-based cementing material.
Preparing the coal gangue based polymer green filling material, wherein the filling material consists of the cementing material, coal gangue particles and water.
Detecting the service performance of the filling material: the filling material is manufactured by using a 150mm multiplied by 150mm cubic die according to a method specified in GB/T50081-2019 'standards of physical and mechanical properties of concrete', stands for 1-2d in a room with the temperature of 20 +/-5 ℃ and the humidity of more than 50%, then is demoulded, and is immediately placed into a curing room with the temperature of 20 +/-2 ℃ and the humidity of more than 65% after demoulded to be cured to the age of 28d. And testing the uniaxial compressive strength after the age.
28d uniaxial compressive strength as given in the following Table
| Sample numbering | 1 | 2 | 3 | 4 | 5 | 6 |
| 28d Strength (MPa) | 5.7 | 5.5 | 4.7 | 5.6 | 5.5 | 5.6 |
Example 2
The coal gangue based polymer green filling material comprises the following components in percentage by mass: 325 percent of ordinary Portland cement, 23.8 percent of first-grade fly ash, 1.3 percent of excitant, 0.9 percent of pour regulator, 0.8 thousandth of anti-layering agent (30 percent of cementing material), 53.5 percent of coal gangue particles and 16.5 percent of water.
The fly ash, coal gangue, exciting agent, coagulation regulator and anti-layering agent are the same as those in the embodiment 1. The preparation method of the coal gangue based green filling material is the same as that of the embodiment 1.
Preparing the coal gangue based polymer green filling material, wherein the filling material is prepared from the cementing material, coal gangue particles and water in a ratio.
Detecting the service performance of the filling material: 28d uniaxial compressive strength (same test method as example 1) as shown in the following Table
| Sample numbering | 1 | 2 | 3 | 4 | 5 | 6 |
| 28d Strength (MPa) | 5.4 | 5.2 | 5.3 | 5.4 | 5.6 | 5.4 |
Example 3
The coal gangue based polymer green filling material comprises the following components in percentage by mass: 8 percent of 325 ordinary Portland cement, 16.85 percent of first-grade fly ash, 0.85 percent of excitant, 1.3 percent of thickening control agent, 0.8 thousandth of anti-layering agent (total gelled material is about 27 percent), 57.5 percent of coal gangue particles and 15.5 percent of water.
The fly ash, coal gangue, exciting agent, coagulation regulator and anti-layering agent are the same as those in the embodiment 1. The preparation method of the coal gangue based polymer green filling material is the same as that of the embodiment 1.
Preparing a coal gangue-based green polymer filling material, wherein the filling material is prepared from the cementing material, coal gangue particles and water in a ratio.
Detecting the service performance of the filling material: 28d uniaxial compressive strength (same test method as example 1) as shown in the following Table
| Sample numbering | 1 | 2 | 3 | 4 | 5 | 6 |
| 28d Strength (MPa) | 5.9 | 5.8 | 5.8 | 5.7 | 6.0 | 5.7 |
Claims (7)
1. The coal gangue base polymer green filling material is characterized in that: the paint comprises the following components in percentage by mass: 4-8% of Portland cement, 15-25% of primary fly ash, 52-62% of coal gangue particles, 1-2% of an excitant, 1-2% of a thickening time control agent, 0.5-1% of an anti-layering agent and 15-18% of water.
2. The coal gangue based green filling material as defined in claim 1, wherein: the coal gangue particle size distribution D90 is as follows:
3. The coal gangue based green filling material as defined in claim 1, wherein: the excitant comprises 10-15% of compound sodium silicate particles, 55-65% of 325-mesh mordenite and 25-30% of 325-mesh clinoptilolite according to mass percentage; the compound sodium silicate particles are sodium silicate particles with the modulus of 1.0 and sodium silicate particles with the modulus of 3.5 according to the weight ratio of 1:1 percent by mass.
4. The coal gangue based polymer green filling material as defined in claim 1, wherein: the thickening time control agent comprises 20-40% of silica fume and 60-80% of anhydrous gypsum by mass percent.
5. The coal gangue based polymer green filling material as defined in claim 1, wherein: the anti-delamination agent is composed of hydroxyethyl cellulose and polyacrylamide.
6. The coal gangue based polymer green filling material as defined in claim 5, wherein: comprises 99% HEC and 1% polyacrylamide by mass. The polyacrylamide is anionic, and the molecular weight is 800 ten thousand.
7. The preparation method of the coal gangue based polymer green filling material is characterized by comprising the following steps: the silicate cement, the first-level fly ash, the coal gangue particles, the excitant, the pour point regulator and the anti-layering agent are uniformly mixed and then are uniformly mixed with water to obtain the coal-fired boiler.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117567091A (en) * | 2023-11-22 | 2024-02-20 | 中国矿业大学 | Mine water corrosion-resistant coal-based solid waste filling paste and preparation method thereof |
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| CN115073103A (en) * | 2022-07-22 | 2022-09-20 | 河北充填采矿技术有限公司 | Coal mine underground bottom hardening material and using method thereof |
| CN115385636A (en) * | 2022-09-23 | 2022-11-25 | 江苏瑜工环保科技有限公司 | Paste filling material and preparation method thereof |
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- 2022-12-02 CN CN202211533909.4A patent/CN115925359A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115073103A (en) * | 2022-07-22 | 2022-09-20 | 河北充填采矿技术有限公司 | Coal mine underground bottom hardening material and using method thereof |
| CN115385636A (en) * | 2022-09-23 | 2022-11-25 | 江苏瑜工环保科技有限公司 | Paste filling material and preparation method thereof |
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| 余丽武主编: "《土木工程材料》", vol. 3, 31 August 2020, 东南大学出版社, pages: 32 - 33 * |
| 廖国胜等: "硅灰对硫铝酸盐水泥水化行为的影响机理", 《建筑材料学报》, vol. 20, no. 6, 31 December 2017 (2017-12-31), pages 840 - 845 * |
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| CN117567091A (en) * | 2023-11-22 | 2024-02-20 | 中国矿业大学 | Mine water corrosion-resistant coal-based solid waste filling paste and preparation method thereof |
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