CN108275957A - A kind of coal gangue hill covering disposition sealing material and construction method - Google Patents
A kind of coal gangue hill covering disposition sealing material and construction method Download PDFInfo
- Publication number
- CN108275957A CN108275957A CN201810090272.3A CN201810090272A CN108275957A CN 108275957 A CN108275957 A CN 108275957A CN 201810090272 A CN201810090272 A CN 201810090272A CN 108275957 A CN108275957 A CN 108275957A
- Authority
- CN
- China
- Prior art keywords
- sealing material
- coal gangue
- solid waste
- disposition
- gangue hill
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000003245 coal Substances 0.000 title claims abstract description 41
- 239000003566 sealing material Substances 0.000 title claims abstract description 40
- 238000010276 construction Methods 0.000 title claims abstract description 16
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 35
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 24
- 239000002910 solid waste Substances 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 125000002091 cationic group Chemical group 0.000 claims abstract description 17
- 239000000126 substance Substances 0.000 claims abstract description 13
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000000654 additive Substances 0.000 claims abstract description 10
- 230000000996 additive effect Effects 0.000 claims abstract description 10
- 239000004411 aluminium Substances 0.000 claims abstract description 10
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 8
- 235000019795 sodium metasilicate Nutrition 0.000 claims abstract description 8
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 239000011505 plaster Substances 0.000 claims abstract description 7
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 6
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 6
- 239000004571 lime Substances 0.000 claims abstract description 6
- 230000037048 polymerization activity Effects 0.000 claims abstract description 6
- 239000004568 cement Substances 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims abstract description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 8
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 5
- 239000004567 concrete Substances 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 4
- 239000011780 sodium chloride Substances 0.000 claims description 4
- 238000001354 calcination Methods 0.000 claims description 3
- 239000005995 Aluminium silicate Substances 0.000 claims description 2
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 claims description 2
- 229910000323 aluminium silicate Inorganic materials 0.000 claims description 2
- 235000012211 aluminium silicate Nutrition 0.000 claims description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims 1
- 239000003469 silicate cement Substances 0.000 claims 1
- 239000010881 fly ash Substances 0.000 abstract description 7
- 235000019270 ammonium chloride Nutrition 0.000 abstract description 5
- 238000002485 combustion reaction Methods 0.000 abstract description 5
- 230000002269 spontaneous effect Effects 0.000 abstract description 5
- 238000007789 sealing Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 21
- 239000010410 layer Substances 0.000 description 20
- 238000000034 method Methods 0.000 description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 8
- 239000002689 soil Substances 0.000 description 7
- 239000010883 coal ash Substances 0.000 description 6
- 239000004615 ingredient Substances 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 150000002500 ions Chemical class 0.000 description 5
- 238000005253 cladding Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 238000004131 Bayer process Methods 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000003911 water pollution Methods 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 229910001413 alkali metal ion Inorganic materials 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 239000002802 bituminous coal Substances 0.000 description 1
- 239000010430 carbonatite Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000003077 lignite Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910000000 metal hydroxide Inorganic materials 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
- C04B28/142—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/144—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B1/00—Dumping solid waste
- B09B1/004—Covering of dumping sites
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00767—Uses not provided for elsewhere in C04B2111/00 for waste stabilisation purposes
- C04B2111/00775—Uses not provided for elsewhere in C04B2111/00 for waste stabilisation purposes the composition being used as waste barriers or the like, e.g. compositions used for waste disposal purposes only, but not containing the waste itself
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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
- Y02W30/30—Landfill technologies aiming to mitigate methane emissions
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of coal gangue hill covering disposition sealing material and construction methods.The sealing material is made of solid waste, additive and water, and the additive includes cationic cure agent and exciting agent, and wherein cationic cure agent accounts for the 0.25%~0.5% of solid waste amount of substance, and exciting agent accounts for the 0.5%~0.75% of solid waste amount of substance；Water accounts for the 27.5%~29.3% of solid waste amount of substance；The solid waste is that 50%~60% red mud, 22.5~35% flyash, 2.5~7.5% desulfurated plaster and 5%~10% lime form by mass percent；The exciting agent is by 30%~35% polymerization activity aluminium, 10%~20% sodium hydroxide, 10~20% sodium metasilicate and 35~40% cement composition；The ammonium chloride that the layered double hydroxide and mass percent that the cationic cure agent is 50%~60% by mass percent are 40%~50% forms.The present invention meets coal gangue hill and handles required mechanical property, sealing performance and environmental-protecting performance index, while dissolving a large amount of solid waste such as red mud, flyash, desulfurated plasters, reduces spontaneous combustion of coal gangue hill risk.
Description
Technical field
The present invention relates to coal gangue hill covering and field of solid waste treating technology, specifically a kind of coal gangue hills
Cover disposition sealing material and construction method.
Background technology
Gangue is the solid waste discharged during coal mining process and coal washing, be one kind in coalification course with coal seam companion
A kind of raw phosphorus content is relatively low, containing sulfide and the black and gray rock harder than coal.Including the driving during tunnelling
The spoil produced in top plate and bottom plate and interlayer in spoil, mining process and that chooses during coal washing wash spoil.China is every
100,000,000 tons of coals are averagely produced, 14,000,000 tons or so of spoil is discharged；From the point of view of coal preparation, per 100,000,000 tons of coking coal rows of washing
20,000,000 tons of spoil amount is put, 100,000,000 tons of coals, 15,000,000 tons of discharge spoil amount are often washed.Thus, the existing coal gangue hill of national coal mine 1500
Remaining seat, 3,000,000,000 tons of accumulating amount or more (account for Chinese industrial solid waste total emission volumn 40% or more).Take up an area 1.3 ten thousand hectares, and
With about 100,000,000 tons every year of speed increase, newly-increased more than 400 hectares of occupation of land is formed.It has become China's cumulative stock and takes up an area at most
Industrial waste.The disposal options of national gangue at present only have the mode for storing up disposition.
A large amount of stackings of gangue, not only cover soil, more seriously seriously affect ecological environment.In gangue
The number of sulfide content is closely related with its raw coal quality, and coal is divided into lignite, bituminous coal and anthracite, therefore the sulphur in gangue
The number of compound content is different because of ground because of coal.Sulfide in gangue escapes or will produce acid water through rainwater leaching, dirty
Contaminate underground water；Coal gangue hill also occurs that spontaneous combustion and is possible to initiation fire, and a spontaneous combustion of coal gangue hill is several years or several
10 years, though there are many extinguishing methods at present, not only cost was big but also is difficult to exclude the possibility of resume combustion, and gives off titanium dioxide
The pernicious gases such as sulphur, nitrogen oxides, oxycarbide and flue dust pollute atmospheric environment.
Red mud is also known as red soil, is the industrial solid wastes being discharged after refinement aluminium oxide in bauxite.Red mud is because producing work
The difference of skill is divided into Bayer process red mud, red mud from sintering process or combination method red mud.Average often produces 1 ton of aluminium oxide, subsidiary to produce
Raw 1.0~2.0 tons of red muds.China is used as the 4th big alumina producing state of the world, and the red mud conservative estimation discharged every year is 3500
Ten thousand tons or more, according to association of China Non-Ferrous Metals Industry recent statistics, 2015 end of the year whole nation red mud cumulative stocks of cut-off reach 3.5 hundred million
Ton, it is contemplated that the year two thousand twenty is up to 5.5 hundred million tons.
Red mud is porous structure, has larger specific surface area, stronger adsorptivity.Density is 2700~2900g/cm3,
0.088~0.25mm of particle diameter, 1200~1250 DEG C of fusing point, plasticity index 17.0~30.0, void ratio 2.53~2.95, than
64.09~186.9m of surface area2/g.Due in red mud contain a large amount of strong basicity chemical substance, dilution 10 times after its pH value still
For 11.25-11.50, original soil pH is 12 or more, has been more than discharge standard GB5058-85 as defined in China national《Non-ferrous metal
Industrial solid wastes contamination control standard》.High pH value determines strong corrosion of the red mud to biology and metal, siliceous material
Property.The sewage of high alkalinity permeates the ground or into surface water, water pH value is made to increase, so that the corresponding mark beyond national regulation
Standard simultaneously because the height of pH value usually influences the toxicity of compound in water, therefore can also cause even more serious water pollution.
Since the chemical bases of red mud are difficult to remove and content is big, and contain heavy metal ion and other plurality of impurities, for red
The innoxious use of mud is difficult to carry out always, and therefore, the processing and comprehensive utilization of waste red mud residues become a global disaster
Topic.It is Chinese to mostly use stockpiling disposition, filling depression at present, be discharged into marine mode and handle.Wherein with stockpiling disposition, filling depression
Mode based on.However, these disposal options do not only take up a large amount of soils, and the chemical composition in red mud is infiltrated soil and is easily caused
Soil alkalization, underground water pollution, these substances of people's taken long-term will necessarily influence health.So subtracting to greatest extent
The harm of few red mud a, it has also become urgent need solves the problems, such as, is extremely urgent.
Patent of invention CN201210136449, which discloses a kind of red mud and directly covers coal gangue hill, prevents the construction party of spontaneous combustion
Method (the patent No.：CN201210136449.1), but in the method disclosed in the patent, red mud is not by processing, water soluble alkali
Metal ion and other harmful metal ions can be leached with rainwash, be polluted to soil.And red mud is directly made
Its strength grade of standby covering material is low, and service life is shorter.
Invention content
The technical problem to be solved in the present invention is to provide that a kind of good airproof performance, intensity is high, lower-cost coal gangue hill
Cover disposition sealing material and construction method.
The present invention is technical solution used by solving its technical problem：
A kind of coal gangue hill covering disposition sealing material, the sealing material is by solid waste, additive and water group
Include cationic cure agent and exciting agent at, the additive, wherein cationic cure agent account for solid waste amount of substance 0.25%~
0.5%, exciting agent accounts for the 0.5%~0.75% of solid waste amount of substance；Water account for solid waste amount of substance 27.5%~
29.3%；The solid waste by mass percent be 50%~60% red mud, 22.5~35% flyash, 2.5~
7.5% desulfurated plaster and 5%~10% lime composition；The exciting agent by 30%~35% polymerization activity aluminium, 10%
~20% sodium hydroxide, 10~20% sodium metasilicate and 35~40% cement composition；The cationic cure agent is by quality hundred
The ammonium chloride that layered double hydroxide and mass percent than being 50%~60% are 40%~50% is divided to form.
In said program, the maximum dry density of the sealing material is 1.29~1.32g/cm3, optimum moisture content exists
27.5%~29.3%.
In said program, the unit weight of the sealing material is 1660kg/m3~1700kg/m3, the appearance of the cationic cure agent
Weight is 1170kg/m3~1230kg/m3, the unit weight of the exciting agent is 1050kg/m3~1140kg/m3。
In said program, layered double-metal hydroxide is C-LDHs, specifically uses Mg-Al-CO3Type or Ca-Al-
CO3Type LDHs is made through 500 DEG C of calcining postcoolings to room temperature.
In said program, the NH4Purity >=99.0% of Cl, impurity NaCl≤0.2%, water-insoluble≤0.02%,
Sulfate≤0.04%.
In said program, the polymerization activity aluminium is aluminium polychloride, polyaluminium sulfate or polymer aluminium silicate.
In said program, purity >=98-99% of the sodium hydroxide, impurity Na2CO3≤ 0.5-1%, NaCl≤0.03-
0.08%, Fe2O3≤ 0.005-0.01%.
In said program, the sodium metasilicate modulus n is between 2.0~3.0.
In said program, the cement is portland cement.
A kind of construction method of processing coal gangue hill concrete, the construction method is by gangue and claim 1 to 9
Any one of them sealing material rolls stacking, and one sublevel of bottom is gangue, and thickness is 2~3m, then covers one on it
Layer thickness be 20~40cm the sealing material, using one day it is curing after, then on it cover one layer of 2~3m coal
Spoil rolls stacking by this structure alternating layers, and last top layer, which rolls, stacks the sealing material, and top layer cladding thickness is 30
~50cm.
In said program, red mud is aluminum oxide industry Bayer process red mud.
Compared with prior art according to the red mud base sealing material obtained by said components and method, intensity is high：1d intensity
Up to 1.5MPa, compression strength is up to 3.5MPa within 28 days.Good seal performance：Air permeability coefficient≤2.0 × 10-10m2, infiltration
Coefficient≤3.2 × 10-6cm/s.Endurance quality is good：Water stability >=0.85, frost resistance >=0.85, acid resistance >=0.85.pH≤
12.5, heavy metal ion dissolution complies fully with《House refuse fills up field control standard》(16889-2008).
The present invention is based on the basic principle of alkali-activated material, the highly basic in red mud is made full use of quickly to excite the materials such as flyash
SiO in material2、Al2O3, hydrated product is quickly formed, early strength is provided.Meanwhile the polymerization activity aluminium in additive is further
Promote sa vitreum to dissolve, ensures that the strength of materials in middle and later periods sustainable growth, generates to coordinate its early strength with after
The development of phase intensity.It introduces desulfurated plaster and generates entringite (AFt) crystal, on the one hand further close material structure, promotes material
Material sealing and weather resistance；On the other hand, the characteristic that can form microdilatancy stress in material internal using AFt, significantly reduces material
The constriction coefficient of material promotes the cracking resistance of material.After alkali-activated carbonatite System forming, Na+It is mainly used for balancing in hydrated product
Negative electrical charge, be chemically cured in hydrated product, it is difficult to dissolve out.Alkali-activated material is formed by hydrated product with huge
Specific surface area wraps up heavy metal ion, physics sealing is carried out to it.Meanwhile the layered double-hydroxide in additive, pass through knot
Structure rebuilds further stabilization/solidification Na+And harmful ion.
The invention has the advantages that：
1, the basic cost free of the Industrial Solid Wastes such as red mud, admixture dosage is low, of low cost, applies and promotes convenient for enterprise.
2, compared with traditional covering material, intensity is high, good seal performance, and service life is long.
3, the harmful ion contained in the Industrial Solid Wastes such as red mud can effectively be cured.Concentration is dissolved out to meet《Consumer waste filling and embedding
Field control standard》Relevant regulations.
4, spontaneous combustion of coal gangue hill risk is reduced, there is significant Social benefit and economic benefit.
Specific implementation mode
For a clearer understanding of the technical characteristics, objects and effects of the present invention, what now the present invention will be described in detail
Specific implementation mode.
Embodiment 1
The present embodiment provides a kind of red-mud coal ash to seal cementitious material, and raw material is：Red mud 500kg, flyash 400kg,
Desulfurated plaster 50kg, lime 50kg, exciting agent 5kg, cationic cure agent 2.5kg, institute's water requirement are 275kg.
Wherein, exciting agent ingredient and content are respectively：Aluminium polychloride 30%, sodium hydroxide 15%, sodium metasilicate 15%, water
Mud 40%.Cationic cure agent ingredient and content are respectively layered double-hydroxide 50%, ammonium chloride 50%.Layered bi-metal hydrogen-oxygen
Compound is C-LDHs, specifically uses Mg-Al-CO3Type or Ca-Al-CO3Type LDHs is made through 500 DEG C of calcining postcoolings to room temperature.
The preparation process that the red-mud coal ash seals cementitious material is as follows：
A, all solid raw materials are proportionally added blender and are uniformly mixed.
B, additive is added to the water, is fully mixed and stirred.
C, the aqueous solution mixed and stirred is added according to proportioning in uniformly mixed siccative, is then stirred.
The present embodiment also provides a kind of construction method of processing coal gangue hill concrete, which is characterized in that the construction party
Method is that gangue and sealing material are rolled stacking, and one sublevel of bottom is gangue, and thickness is 2~3m, is then covered on it
A layer thickness is the sealing material of 20~40cm, using one day it is curing after, then cover one layer of 2~3m's on it
Gangue rolls stacking by this structure alternating layers, and last top layer, which rolls, stacks the sealing material, and top layer cladding thickness is
30~50cm.
Embodiment 2
The present embodiment provides a kind of red-mud coal ash to seal cementitious material, and raw material is：Red mud 550kg, flyash 315kg,
Desulfurated plaster 60kg, lime 75kg, exciting agent 7.5kg, cationic cure agent 5kg, institute's water requirement are 282kg.
Wherein, exciting agent ingredient and content are respectively：Polyaluminium sulfate 30%, sodium hydroxide 20%, sodium metasilicate 10%, water
Mud 40%.Cationic cure agent ingredient and content are respectively layered double-hydroxide 60%, ammonium chloride 40%.
The preparation process that the red-mud coal ash seals cementitious material is as follows：
A, all solid raw materials are proportionally added blender and are uniformly mixed.
B, additive is added to the water, is fully mixed and stirred.
C, the aqueous solution mixed and stirred is added according to proportioning in uniformly mixed siccative, is then stirred.
The present embodiment also provides a kind of construction method of processing coal gangue hill concrete, which is characterized in that the construction party
Method is that gangue and sealing material are rolled stacking, and one sublevel of bottom is gangue, and thickness is 2~3m, is then covered on it
A layer thickness is the sealing material of 20~40cm, using one day it is curing after, then cover one layer of 2~3m's on it
Gangue rolls stacking by this structure alternating layers, and last top layer, which rolls, stacks the sealing material, and top layer cladding thickness is
30~50cm.
Embodiment 3
The present embodiment provides a kind of red-mud coal ash to seal cementitious material, and raw material is：Red mud 600kg, flyash 225kg,
Desulfurated plaster 75kg, lime 100kg, exciting agent 10kg, cationic cure agent 7.5kg, institute's water requirement are 297kg.
Wherein, exciting agent ingredient and content are respectively：Aluminium polychloride 35%, sodium hydroxide 15%, sodium metasilicate 15%, water
Mud 35%.Cationic cure agent ingredient and content are respectively layered double-hydroxide 50%, ammonium chloride 50%.
The preparation process that the red-mud coal ash seals cementitious material is as follows：
A, all solid raw materials are proportionally added blender and are uniformly mixed.
B, additive is added to the water, is fully mixed and stirred.
C, the aqueous solution mixed and stirred is added according to proportioning in uniformly mixed siccative, is then stirred.
The present embodiment also provides a kind of construction method of processing coal gangue hill concrete, which is characterized in that the construction party
Method is that gangue and sealing material are rolled stacking, and one sublevel of bottom is gangue, and thickness is 2~3m, is then covered on it
A layer thickness is the sealing material of 20~40cm, using one day it is curing after, then cover one layer of 2~3m's on it
Gangue rolls stacking by this structure alternating layers, and last top layer, which rolls, stacks the sealing material, and top layer cladding thickness is
30~50cm.
The test result of the partial properties of above-described embodiment sees below Tables 1 and 2.
The index request and test result of the sealing material of 1 present invention of table:
The index request and test result of the sealing material of 2 present invention of table:
Note*：ND representatives do not detect
The embodiment of the present invention is described above, but the invention is not limited in above-mentioned specific embodiment parties
Formula, the above mentioned embodiment is only schematical, rather than restrictive, and those skilled in the art are in this hair
Under bright enlightenment, without breaking away from the scope protected by the purposes and claims of the present invention, many forms can be also made, this
It is a little to belong within the protection of the present invention.
Claims (10)
1. a kind of coal gangue hill covers disposition sealing material, which is characterized in that the sealing material is by solid waste, additional
Agent and water composition, the additive includes cationic cure agent and exciting agent, and wherein cationic cure agent accounts for solid waste amount of substance
0.25%~0.5%, exciting agent accounts for the 0.5%~0.75% of solid waste amount of substance；Water accounts for solid waste amount of substance
27.5%~29.3%；The solid waste is 50%~60% red mud, 22.5~35% fine coal by mass percent
Ash, 2.5~7.5% desulfurated plaster and 5%~10% lime composition；The exciting agent by 30%~35% polymerization activity
Aluminium, 10%~20% sodium hydroxide, 10~20% sodium metasilicate and 35~40% cement composition；The cationic cure agent by
The ammonium chloride group that the layered double hydroxide and mass percent that mass percent is 50%~60% are 40%~50%
At.
2. coal gangue hill as described in claim 1 covers disposition sealing material, which is characterized in that the sealing material is most
Big dry density is 1.29~1.32g/cm3, optimum moisture content is 27.5%~29.3%.
3. coal gangue hill as described in claim 1 covers disposition sealing material, which is characterized in that the appearance of the sealing material
Weight is 1660kg/m3~1700kg/m3, the unit weight of the cationic cure agent is 1170kg/m3~1230kg/m3, the exciting agent
Unit weight be 1050kg/m3~1140kg/m3。
4. coal gangue hill as described in claim 1 covers disposition sealing material, which is characterized in that layered bimetallic hydrogen
Oxide is C-LDHs, specifically uses Mg-Al-CO3Type or Ca-Al-CO3Type LDHs is through 500 DEG C of calcining postcoolings to room temperature system
.
5. coal gangue hill as described in claim 1 covers disposition sealing material, which is characterized in that the NH4The purity of Cl >=
99.0%, impurity NaCl≤0.2%, water-insoluble≤0.02%, sulfate≤0.04%.
6. coal gangue hill as described in claim 1 covers disposition sealing material, which is characterized in that the polymerization activity aluminium is
Aluminium polychloride, polyaluminium sulfate or polymer aluminium silicate.
7. coal gangue hill as described in claim 1 covers disposition sealing material, which is characterized in that the sodium hydroxide it is pure
Degree >=98-99%, impurity Na2CO3≤ 0.5-1%, NaCl≤0.03-0.08%, Fe2O3≤ 0.005-0.01%.
8. coal gangue hill as described in claim 1 covers disposition sealing material, which is characterized in that the sodium metasilicate modulus n
Between 2.0~3.0.
9. coal gangue hill as described in claim 1 covers disposition sealing material, which is characterized in that the cement is silicate
Cement.
10. a kind of construction method of processing coal gangue hill concrete, which is characterized in that the construction method is by gangue and power
Profit requires 1 to 9 any one of them sealing material to roll stacking, and one sublevel of bottom is gangue, and thickness is 2~3m, is then existed
The sealing material that covering a layer thickness is 20~40cm thereon, using one day it is curing after, then cover one on it
The gangue of 2~3m of layer rolls stacking by this structure alternating layers, and last top layer, which rolls, stacks the sealing material, and top layer covers
Lid thickness is 30~50cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810090272.3A CN108275957B (en) | 2018-01-30 | 2018-01-30 | Sealing material for covering disposal of coal gangue hill and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810090272.3A CN108275957B (en) | 2018-01-30 | 2018-01-30 | Sealing material for covering disposal of coal gangue hill and construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108275957A true CN108275957A (en) | 2018-07-13 |
| CN108275957B CN108275957B (en) | 2020-05-26 |
Family
ID=62805683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810090272.3A Active CN108275957B (en) | 2018-01-30 | 2018-01-30 | Sealing material for covering disposal of coal gangue hill and construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108275957B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110256028A (en) * | 2019-06-13 | 2019-09-20 | 山东大学 | A kind of bastard coal ground mass mine cemented filling material and preparation method |
| CN110510893A (en) * | 2019-08-19 | 2019-11-29 | 昆明理工大学 | A kind of anti-oxidation barrier material and the preparation method and application thereof |
| CN111233426A (en) * | 2020-03-24 | 2020-06-05 | 内蒙古科技大学 | Novel guniting material for inhibiting spontaneous combustion of gangue dump and application method thereof |
| CN113185253A (en) * | 2021-06-04 | 2021-07-30 | 许泽胜 | Curing material and preparation method and application thereof |
| CN114620960A (en) * | 2022-04-26 | 2022-06-14 | 洛阳君江建材科技有限公司 | Method for preparing building material from red mud |
| CN115120922A (en) * | 2022-06-27 | 2022-09-30 | 中煤科工集团西安研究院有限公司 | Modified coal gangue-based fire prevention and extinguishing three-phase foam material, and preparation method and application thereof |
| CN115709213A (en) * | 2022-11-11 | 2023-02-24 | 北京化工大学 | Method for forming hydrotalcite-like compound through attapulgite water and fertilizer retention coupling hyperstable mineralization to reconstruct soil in coal gangue slag hill |
| CN116023114A (en) * | 2022-12-27 | 2023-04-28 | 许泽胜 | Composite material for recycling and sealing gangue piles of gangue mountain and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101624267A (en) * | 2009-08-11 | 2010-01-13 | 山西鑫秀工矿废渣利用有限公司 | Low-temperature ceramic curing agent of red mud from Bayer process |
| CN102671906A (en) * | 2012-05-05 | 2012-09-19 | 段明丰 | Method for processing coal gangue and red mud |
-
2018
- 2018-01-30 CN CN201810090272.3A patent/CN108275957B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101624267A (en) * | 2009-08-11 | 2010-01-13 | 山西鑫秀工矿废渣利用有限公司 | Low-temperature ceramic curing agent of red mud from Bayer process |
| CN102671906A (en) * | 2012-05-05 | 2012-09-19 | 段明丰 | Method for processing coal gangue and red mud |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110256028A (en) * | 2019-06-13 | 2019-09-20 | 山东大学 | A kind of bastard coal ground mass mine cemented filling material and preparation method |
| CN110510893A (en) * | 2019-08-19 | 2019-11-29 | 昆明理工大学 | A kind of anti-oxidation barrier material and the preparation method and application thereof |
| CN111233426A (en) * | 2020-03-24 | 2020-06-05 | 内蒙古科技大学 | Novel guniting material for inhibiting spontaneous combustion of gangue dump and application method thereof |
| CN113185253A (en) * | 2021-06-04 | 2021-07-30 | 许泽胜 | Curing material and preparation method and application thereof |
| CN114620960A (en) * | 2022-04-26 | 2022-06-14 | 洛阳君江建材科技有限公司 | Method for preparing building material from red mud |
| CN115120922A (en) * | 2022-06-27 | 2022-09-30 | 中煤科工集团西安研究院有限公司 | Modified coal gangue-based fire prevention and extinguishing three-phase foam material, and preparation method and application thereof |
| CN115709213A (en) * | 2022-11-11 | 2023-02-24 | 北京化工大学 | Method for forming hydrotalcite-like compound through attapulgite water and fertilizer retention coupling hyperstable mineralization to reconstruct soil in coal gangue slag hill |
| CN116023114A (en) * | 2022-12-27 | 2023-04-28 | 许泽胜 | Composite material for recycling and sealing gangue piles of gangue mountain and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108275957B (en) | 2020-05-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108275957A (en) | A kind of coal gangue hill covering disposition sealing material and construction method | |
| CA2239504C (en) | A settable composition and uses therefor | |
| CN104190690B (en) | A kind of method and application that utilizes ammonia-soda process alkaline residue to prepare dechlorination alkaline residue mixture | |
| Shakir et al. | Development of bricks from waste material: A review paper | |
| CN101381217B (en) | Building material based on interaction of alkali and CO2 | |
| US20080179253A1 (en) | Porous Particulate Material For Fluid Treatment, Cementitious Composition and Method of Manufacture Thereof | |
| Ribeiro et al. | Use of red mud as addition for portland cement mortars | |
| CN109776039A (en) | A kind of modified geo-polymer maritime concrete and preparation method | |
| CN104860571A (en) | Concrete surface sealing curing treatment enhancing agent | |
| CN110002829B (en) | Electrolytic manganese slag baking-free brick and preparation method thereof | |
| CN109369137A (en) | A kind of acid and alkali-resistance concrete | |
| CN107285702A (en) | A kind of filling slurry of colliery doping discarded concrete aggregate | |
| Pratiwi et al. | A review of concrete durability in marine environment | |
| EP3371125B1 (en) | Process for producing a building material obtained from an alkaline activation of sawing sludge of stone materials | |
| EP2113494B1 (en) | Cement additive, cement composition, cement composition comprising waste material, and processes for making and using the same | |
| Suresh et al. | Influence of chemical admixtures on geotechnical properties of expansive soil | |
| CN105819721A (en) | concrete rheological preservative and preparation method and application thereof | |
| CN110655355A (en) | Iron sand concrete and preparation method thereof | |
| CN107857543B (en) | Preparation method of chlorine salt corrosion resistant environment-friendly mortar | |
| CN108516741B (en) | Steel slag sand-straw ash composite doping mortar and preparation method thereof | |
| KR101320576B1 (en) | Civil block comprising photocatalyst without cement and manufacturing method thereof | |
| Siddique et al. | Cement kiln dust | |
| Maaze et al. | Influence of marble and aluminium waste powder on the performance of bricks | |
| JPH11293243A (en) | Ground solidifying improver | |
| CN112110669A (en) | Recycled aggregate reinforcing agent, preparation method thereof and recycled aggregate concrete |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211011 Address after: 030006 room 2204-2211, 22 / F, block a, No. 6, West 2nd Lane, Dongqu Road, Taiyuan Xuefu Park, Shanxi comprehensive reform demonstration zone, Taiyuan City, Shanxi Province Patentee after: TAIYUAN LIGONG HENGJI GEOTECHNICAL ENGINEERING Co.,Ltd. Address before: 430070 Hubei Province, Wuhan city Hongshan District Luoshi Road No. 122 Patentee before: WUHAN University OF TECHNOLOGY |
|
| TR01 | Transfer of patent right |