WO2015007104A1 - Coal ash solidification foam material used for prevention and treatment of spontaneous combustion of coal and preparation method therefor - Google Patents
Coal ash solidification foam material used for prevention and treatment of spontaneous combustion of coal and preparation method therefor Download PDFInfo
- Publication number
- WO2015007104A1 WO2015007104A1 PCT/CN2014/074075 CN2014074075W WO2015007104A1 WO 2015007104 A1 WO2015007104 A1 WO 2015007104A1 CN 2014074075 W CN2014074075 W CN 2014074075W WO 2015007104 A1 WO2015007104 A1 WO 2015007104A1
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- WO
- WIPO (PCT)
- Prior art keywords
- parts
- coal
- foam
- fly ash
- water
- Prior art date
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- 239000003245 coal Substances 0.000 title claims abstract description 47
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 24
- 230000002269 spontaneous effect Effects 0.000 title claims abstract description 24
- 239000006261 foam material Substances 0.000 title claims abstract description 17
- 238000002360 preparation method Methods 0.000 title abstract description 7
- 230000002265 prevention Effects 0.000 title abstract description 7
- 238000007711 solidification Methods 0.000 title abstract description 6
- 230000008023 solidification Effects 0.000 title abstract description 6
- 239000010883 coal ash Substances 0.000 title abstract 6
- 239000006260 foam Substances 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000007789 gas Substances 0.000 claims abstract description 13
- 238000003756 stirring Methods 0.000 claims abstract description 12
- 239000012190 activator Substances 0.000 claims abstract description 11
- 239000011812 mixed powder Substances 0.000 claims abstract description 11
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 7
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 6
- 239000010881 fly ash Substances 0.000 claims description 27
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 16
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 16
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 16
- 238000002156 mixing Methods 0.000 claims description 15
- -1 that is Substances 0.000 claims description 12
- NVVZQXQBYZPMLJ-UHFFFAOYSA-N formaldehyde;naphthalene-1-sulfonic acid Chemical compound O=C.C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 NVVZQXQBYZPMLJ-UHFFFAOYSA-N 0.000 claims description 11
- 150000001875 compounds Chemical class 0.000 claims description 10
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 claims description 9
- 239000000292 calcium oxide Substances 0.000 claims description 8
- 235000012255 calcium oxide Nutrition 0.000 claims description 8
- 239000001913 cellulose Substances 0.000 claims description 8
- 229920002678 cellulose Polymers 0.000 claims description 8
- 229910001629 magnesium chloride Inorganic materials 0.000 claims description 8
- 239000000395 magnesium oxide Substances 0.000 claims description 8
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 8
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 8
- 239000005543 nano-size silicon particle Substances 0.000 claims description 8
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 8
- 239000003381 stabilizer Substances 0.000 claims description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 7
- RYAGRZNBULDMBW-UHFFFAOYSA-L calcium;3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Ca+2].COC1=CC=CC(CC(CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O RYAGRZNBULDMBW-UHFFFAOYSA-L 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 239000011261 inert gas Substances 0.000 claims description 7
- 239000002002 slurry Substances 0.000 claims description 7
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 6
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical group [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 5
- 229910001388 sodium aluminate Inorganic materials 0.000 claims description 5
- 239000000404 calcium aluminium silicate Substances 0.000 claims description 4
- 235000012215 calcium aluminium silicate Nutrition 0.000 claims description 4
- WNCYAPRTYDMSFP-UHFFFAOYSA-N calcium aluminosilicate Chemical compound [Al+3].[Al+3].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O WNCYAPRTYDMSFP-UHFFFAOYSA-N 0.000 claims description 4
- 229940078583 calcium aluminosilicate Drugs 0.000 claims description 4
- 229920005551 calcium lignosulfonate Polymers 0.000 claims description 4
- 239000011268 mixed slurry Substances 0.000 claims description 4
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims 2
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims 1
- 239000000835 fiber Substances 0.000 claims 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 7
- 238000005187 foaming Methods 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 7
- 229910052760 oxygen Inorganic materials 0.000 abstract description 7
- 239000001301 oxygen Substances 0.000 abstract description 7
- 239000012530 fluid Substances 0.000 abstract description 6
- 238000009413 insulation Methods 0.000 abstract description 3
- 230000035699 permeability Effects 0.000 abstract description 2
- 239000011435 rock Substances 0.000 abstract description 2
- 239000004872 foam stabilizing agent Substances 0.000 abstract 2
- 230000000087 stabilizing effect Effects 0.000 abstract 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 12
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 6
- 235000017557 sodium bicarbonate Nutrition 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 3
- 238000007580 dry-mixing Methods 0.000 description 2
- 239000000499 gel Substances 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical group [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- FXSZVRRWJQFKMQ-UHFFFAOYSA-N O.[Ca].[Ca].OS(O)(=O)=O.OS(O)(=O)=O Chemical compound O.[Ca].[Ca].OS(O)(=O)=O.OS(O)(=O)=O FXSZVRRWJQFKMQ-UHFFFAOYSA-N 0.000 description 1
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- CQBLUJRVOKGWCF-UHFFFAOYSA-N [O].[AlH3] Chemical compound [O].[AlH3] CQBLUJRVOKGWCF-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000013012 foaming technology Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004630 mental health Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000007903 penetration ability Effects 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002023 wood Substances 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
-
- 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
Definitions
- the invention relates to a cured foam material and a preparation method thereof, in particular to a fly ash solidified foam material for preventing spontaneous combustion of coal and a preparation method thereof.
- Coal spontaneous combustion is one of the main natural disasters in coal mines, which seriously threatens the life safety of coal mine production and miners.
- Coal field fires are mainly caused by spontaneous combustion of coal due to oxygen leakage from surface cracks.
- Coal spontaneous combustion in coal mines mainly occurs in goafs with open air passages, open cuts, stop mining lines, geological structural belts, and high-rising areas.
- technologies such as grouting, inert gas, inhibitor, gel and polyurethane foam are used at home and abroad.
- these methods have some shortcomings.
- the yellow mud grouting technology needs to consume a large amount of soil, some areas lacking soil can not be used and the slurry is easy to seep down, and can not block small cracks; inert gas is easy to spread with air leakage, and it is not easy to stay in the injected area.
- the ammonium salt gel releases toxic and harmful gases, and the colloid is easy to crack; the inhibitors corrode the underground equipment and endanger the physical and mental health of the workers, and the fire extinguishing effect is not ideal; the organic curing foam has good effect but high cost and high environmental temperature requirements. .
- three-phase foam technology has been used to prevent coal spontaneous combustion in mines.
- the three-phase foam has no strength and does not cure. On the spot, it is sometimes required to have a foaming multiple, a curing foam which can be cured and which has a certain strength to fill, plug and prevent coal spontaneous combustion.
- the object of the invention is to solve the problems existing in the existing coal spontaneous combustion prevention and control technology, and provide a self-ignition prevention coal which can well dilute the oxygen concentration in the residual coal space, has low thermal conductivity, good heat insulation effect, simple operation process, safety and low cost. Fly ash solidified foam.
- the fly ash solidified foam material of the invention comprises the following components and parts by weight: water 40-60 parts, 100 parts of fly ash, chemical self-produced gas compound powder 25-40 parts, quick setting agent 3- 5 parts, 2-4 parts of active activator, 1-2 parts of water reducing agent, 1 part of compound foam stabilizer;
- the chemical self-generating gas compound powder is prepared according to the following ratio by weight: 24-35 parts of calcium sulfate hemihydrate, 1-5 parts of sodium hydrogencarbonate, and a chemical reaction between the two produces an inert gas, namely carbon dioxide gas.
- the slurry is foamed;
- the quick-setting admixture is prepared in the following parts by weight: 1-2 parts of aluminum-oxygen clinker, 1 part of sodium carbonate, 1-2 parts of quicklime, and the weight percentage of the aluminoxy clinker is Sodium aluminate 94%, alumina 4%, calcium aluminosilicate 2%;
- the active activator is prepared in the following proportion by weight: magnesium oxide 0.8-1.6 parts, magnesium chloride 1.2-2.4 parts;
- the water agent is divided into the following weights Ratio: 0.5-1 parts of calcium lignosulfonate, 0.5-1 part of naphthalene sulfonate formaldehyde condensate, Na2S
- the preparation process of the fly ash solidified foam of the present invention is:
- Step 1 Add 40-60 parts of water, 0.2 parts of ethylene glycol butyl ether, 0.3 parts of nano-silica, 0.5 parts of hydroxyhexyl cellulose to the special mixing container A, and stir the mixer at 3000 ⁇ 100 rpm, stir The time is 2 min, forming a homogenization liquid;
- Step 2 Add 100 parts of fly ash to dry blender B, 1-2 parts of aluminoxy clinker, 1 part of sodium carbonate, 1-2 parts of quicklime, 0.8-1.6 parts of magnesium oxide, 1.2-2.4 parts of magnesium chloride, wood 0.5-1 part of calcium sulfonate, 0.5-1 part of naphthalene sulfonate formaldehyde condensate, the stirrer is rotated at 3000 ⁇ 100 rpm, and the stirring time is 3 min to form a mixed powder;
- Step 3 Mix the mixed powder in the dry blender B into the homogenizing liquid in the special mixing container A.
- the special mixing container A stirrer rotates at 12000 ⁇ 500 rpm, and the stirring time is 2 min to form a mixed slurry.
- static foaming prepared as a fly ash solidified foam for preventing spontaneous combustion of coal.
- the present invention foams a slurry by chemical reaction of calcium sulfate hemihydrate and sodium hydrogencarbonate in water to generate an inert gas, that is, carbon dioxide gas; a composite foam stabilizer, ethylene glycol butyl ether, is used.
- the nano-silicon and hydroxyhexyl cellulose are compounded to uniformly disperse and suspend the solid phase particles in the slurry; the curing time is adjusted by adjusting the weight fraction between the accelerator, the active activator and the water reducing agent, and the finally formed pulverized coal
- the ash-cured foam fluid material is light in weight and has a foaming ratio of 8 to 15 times.
- the foam fluid can be uniformly covered on the loose coal rock body, the crack penetration ability is strong, the curing time is adjustable, and the compressive strength is large, more than 1.5Mpa.
- a certain amount of inert gas ie carbon dioxide gas, can be released to dilute the oxygen concentration in the residual coal space.
- the thermal conductivity is low, and the thermal insulation effect is good.
- the operation process is simple, safe, and low in cost. . It can quickly wrap the coal body and isolate oxygen, effectively block the air leakage passage and coal body cracks, and prevent the oxidation of coal. This material is of great significance for the prevention and control of coal spontaneous combustion.
- the present invention has the following advantages:
- the fly ash solidified foam material for preventing spontaneous combustion of coal adopts a chemical reaction self-produced foam system of calcium sulfate hemihydrate, sodium hydrogencarbonate and water, all of which are environmentally friendly materials and generate inert gas. (CO2) can play a role in diluting the oxygen concentration in the oxidation space of the coal;
- fly ash solidified foam material for preventing self-ignition of coal the main raw material is fly ash, hemihydrate sulfuric acid Calcium, sodium bicarbonate and other sources are widely available, and the operation process is simple;
- the fly ash solidified foam material for preventing self-ignition of coal according to the present invention, the foam fluid has good encapsulation performance for coal, has good permeability to cracks, and the solidification time is adjustable;
- the fly ash solidified foam material for preventing coal spontaneous combustion is light (the foaming multiple is 8 to 15 times), the compressive strength is large (more than 1.5Mpa), the thermal conductivity is low, and the separation is good.
- the thermal effect has wide applicability in the field of coal spontaneous combustion prevention.
- the fly ash solidified foam material comprises the following components and parts by weight: water 40-60 parts, 100 parts of fly ash, chemical self-produced gas compound powder 25-40 parts, quick-setting agent 3-5 parts, 2-4 parts of active activator, 1-2 parts of water reducing agent, and 1 part of compound foam stabilizer;
- the chemical self-generating gas compound powder is composed of calcium sulfate hemihydrate and sodium hydrogencarbonate, and carbon dioxide is generated by the reaction of both in the water to foam the slurry.
- the two are prepared according to the following parts by weight: 24-35 parts of calcium sulfate hemihydrate, 1-5 parts of sodium hydrogencarbonate;
- the quick-setting agent is composed of aluminoxy clinker, sodium carbonate and quicklime, the following are as follows: The ratio by weight is made up: 1-2 parts of aluminoxy clinker, 1 part of sodium carbonate, 1-2 parts of quicklime, the weight percentage of the aluminoxy clinker is 94% of sodium aluminate, 4% of alumina, aluminum silicon Calcium acid 2%;
- the active activator is a magnesium material curing agent, which is composed of magnesium oxide and magnesium chloride, and the two are prepared according to the following parts by weight: magnesium oxide 0.8-1.6 parts, magnesium chloride 1.2-2.4 parts;
- Example 2 First, 50 parts of water, 0.2 parts of ethylene glycol butyl ether, 0.3 parts of nano silicon, 0.5 parts of hydroxyhexyl cellulose, and a stirrer were rotated at 3000 ⁇ 100 rpm in a dedicated mixing container A. The stirring time is 2 min to form a homogenizing liquid; then, 100 parts of fly ash, 1 part of aluminoxy clinker, 1 part of sodium carbonate, 1 part of quicklime, 1.2 parts of magnesium oxide and 1.8 parts of magnesium chloride are added to the dry mixing mixer B.
- the stirrer rotates at 3000 ⁇ 100 rpm, and the mixing time is 3 min to form a mixed powder. Finally, the mixed powder in the dry blender B is mixed.
- the special mixing container A stirrer rotates at a speed of 12,000 ⁇ 500 rpm, and the stirring time is 2 min, forming a mixed slurry, which is statically foamed, and is prepared into a fly ash solidified foam for preventing spontaneous combustion of coal. material.
- the 3MPa ground moving grouting pump is used to inject the fly ash solidified foam fluid which is self-igniting coal to be injected into the surface crack of the coal field fire that needs to be trapped, and cover the coal body to reduce and control Leakage of air to prevent spontaneous combustion of coal.
- Example 3 First, 60 parts of water, 0.2 parts of ethylene glycol butyl ether, 0.3 parts of nano silicon, 0.5 parts of hydroxyhexyl cellulose, and a stirrer were rotated at 3000 ⁇ 100 rpm in a dedicated mixing container A. The stirring time is 2 min to form a homogenizing liquid; then, 100 parts of fly ash, 2 parts of aluminoxy clinker, 1 part of sodium carbonate, 2 parts of quicklime, 1.6 parts of magnesium oxide and 2.4 parts of magnesium chloride are added to the dry mixing mixer B.
- the special mixing container A stirrer rotates at 12000 ⁇ 500 rpm, and the stirring time is 2 min, forming a mixed slurry, which is statically foamed, and is prepared for preventing spontaneous combustion of coal.
- Fly ash solidified foam Using a 2MPa downhole mobile grouting pump, the prepared fly ash solidified foam fluid for preventing spontaneous combustion of coal is injected into the underground goaf of the construction through the conveying pipeline to grout the borehole to reach the surface of the loose coal body, thereby shielding the coal oxygen. The role of the compound to prevent spontaneous combustion of coal.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Fireproofing Substances (AREA)
Abstract
Provided are a coal ash solidification foam material used for prevention and treatment of spontaneous combustion of coal and a preparation method therefor . The coal ash solidification foam material is composed of the following in part by weight: 40 - 60 parts of water, 100 parts of coal ash, 25 parts of a mixed powder capable of chemically self-producing gases, 1 - 5 parts of a setting accelerator, 1 - 4 parts of an activator, 0.6 - 1.5 parts of a water-reducing agent and 0.5 - 1 part of a foam stabilizing agent. The preparation method comprises: adding the foam stabilizing agent into water and stirring to form a foam stabilizing liquid, then adding the coal ash, the mixed powder capable of chemically self-producing gases, the setting accelerator, the activator and the water-reducing agent into a dry mixer and stirring for 10 to 15 minutes until same is mixed sufficiently uniform, and finally put the mixed powder into the foam stabilizing liquid to prepare the coal ash solidification foam material. The material is lightweight, and the foam fluid thereof can evenly cover loose coal rock masses and has a strong fracture permeability, an adjustable solidification time, a great compressive strength, a low heat conductivity coefficient and a good heat insulation effect; and during the foaming procedure, the released carbon dioxide can greatly dilute the concentration of oxygen within the residual coal space.
Description
防治煤自燃的粉煤灰固化泡沫材料及制备方法 技术领域 Fly ash solidified foam material for preventing spontaneous combustion of coal and preparation method thereof
本发明涉及一种固化泡沫材料及制备方法， 特别是一种防治煤自燃的粉煤灰固化泡 沫材料及制备方法。 The invention relates to a cured foam material and a preparation method thereof, in particular to a fly ash solidified foam material for preventing spontaneous combustion of coal and a preparation method thereof.
背景技术 Background technique
煤炭自燃是煤矿的主要自然灾害之一， 严重威胁着煤矿生产和矿工的生命安全。 煤 田火灾主要是由于地表裂隙漏风供氧引起煤炭自燃。 矿井下煤自燃主要发生在存在漏风 通道的采空区、 开切眼、 停采线、 地质构造带、 巷道高冒区等地点。 为了防治煤炭自燃， 国内外采用了灌浆、 惰气、 阻化剂、 凝胶和聚氨酯泡沫等技术。 但这些方法都存在一些 不足， 黄泥灌浆技术需消耗大量土壤， 一些缺土的地区无法使用且浆液容易向下渗流， 不能封堵细小裂隙； 惰气易随漏风扩散， 不易滞留在注入的区域内； 铵盐凝胶释放有毒 有害气体， 胶体容易龟裂； 阻化剂腐蚀井下设备和危害工人身心健康， 防灭火效果也不 是很理想； 有机固化泡沫效果好但成本高且对环境温度要求高。 近年来， 三相泡沫新技 术来防治矿井的煤炭自燃， 该技术较之一般的防灭火技术和材料有很大的优越性， 能充 分满足大范围防灭火的需要。 但三相泡沫没有强度， 未实现固化； 而现场有时需求具有 较高发泡倍数、 能固化且应具有一定强度的固化泡沫材料来充填、堵漏和防治煤炭自燃。 Coal spontaneous combustion is one of the main natural disasters in coal mines, which seriously threatens the life safety of coal mine production and miners. Coal field fires are mainly caused by spontaneous combustion of coal due to oxygen leakage from surface cracks. Coal spontaneous combustion in coal mines mainly occurs in goafs with open air passages, open cuts, stop mining lines, geological structural belts, and high-rising areas. In order to prevent spontaneous combustion of coal, technologies such as grouting, inert gas, inhibitor, gel and polyurethane foam are used at home and abroad. However, these methods have some shortcomings. The yellow mud grouting technology needs to consume a large amount of soil, some areas lacking soil can not be used and the slurry is easy to seep down, and can not block small cracks; inert gas is easy to spread with air leakage, and it is not easy to stay in the injected area. The ammonium salt gel releases toxic and harmful gases, and the colloid is easy to crack; the inhibitors corrode the underground equipment and endanger the physical and mental health of the workers, and the fire extinguishing effect is not ideal; the organic curing foam has good effect but high cost and high environmental temperature requirements. . In recent years, three-phase foam technology has been used to prevent coal spontaneous combustion in mines. This technology has great advantages over general fire-fighting technologies and materials, and can fully meet the needs of large-scale fire prevention. However, the three-phase foam has no strength and does not cure. On the spot, it is sometimes required to have a foaming multiple, a curing foam which can be cured and which has a certain strength to fill, plug and prevent coal spontaneous combustion.
发明内容 Summary of the invention
本发明的目的是针对已有煤炭自燃防治技术存在的问题， 提供一种能很好稀释遗煤 空间氧气浓度、 导热系数低、 隔热效果好、 操作工艺简单、 安全、 成本低的防治煤自燃 的粉煤灰固化泡沫材料。 The object of the invention is to solve the problems existing in the existing coal spontaneous combustion prevention and control technology, and provide a self-ignition prevention coal which can well dilute the oxygen concentration in the residual coal space, has low thermal conductivity, good heat insulation effect, simple operation process, safety and low cost. Fly ash solidified foam.
本发明的粉煤灰固化泡沫材料， 包括以下各组分及重量份数： 水 40-60份、 粉煤灰 100份、 化学自产气复配粉体 25-40份、 速凝剂 3-5份、 活性激发剂 2-4份、 减水剂 1-2 份、 复合型稳泡剂 1份； The fly ash solidified foam material of the invention comprises the following components and parts by weight: water 40-60 parts, 100 parts of fly ash, chemical self-produced gas compound powder 25-40 parts, quick setting agent 3- 5 parts, 2-4 parts of active activator, 1-2 parts of water reducing agent, 1 part of compound foam stabilizer;
所述的化学自产气复配粉体按以下重量份配比制成： 半水合硫酸钙 24-35份， 碳酸 氢钠 1-5份， 由两者发生化学反应产生惰性气体即二氧化碳气体来使浆液发泡； 所述的 速凝剂按以下重量份配比制成： 铝氧熟料 1-2份， 碳酸钠 1份、 生石灰 1-2份， 所述的铝 氧熟料重量百分比为铝酸钠 94%、 氧化铝 4%、 铝硅酸钙 2%; 所述的活性激发剂按以下 重量份配比制成： 氧化镁 0.8-1.6份， 氯化镁 1.2-2.4份； 所述的减水剂为按以下重量份配
比制成： 木质素磺酸钙 0.5-1份， 萘磺酸盐甲醛缩合物 0.5-1份， 所述的萘磺酸盐甲醛缩 合物 Na2S04含量 <3%；所述的复合型稳泡剂按以下重量份配比制成：乙二醇丁醚 0.2份， 纳米硅 0.3份、 羟已基纤维素 0.5份； 通过调整速凝剂、 活性激发剂、 减水剂之间的重量 分数调节固化时间。 The chemical self-generating gas compound powder is prepared according to the following ratio by weight: 24-35 parts of calcium sulfate hemihydrate, 1-5 parts of sodium hydrogencarbonate, and a chemical reaction between the two produces an inert gas, namely carbon dioxide gas. The slurry is foamed; the quick-setting admixture is prepared in the following parts by weight: 1-2 parts of aluminum-oxygen clinker, 1 part of sodium carbonate, 1-2 parts of quicklime, and the weight percentage of the aluminoxy clinker is Sodium aluminate 94%, alumina 4%, calcium aluminosilicate 2%; the active activator is prepared in the following proportion by weight: magnesium oxide 0.8-1.6 parts, magnesium chloride 1.2-2.4 parts; The water agent is divided into the following weights Ratio: 0.5-1 parts of calcium lignosulfonate, 0.5-1 part of naphthalene sulfonate formaldehyde condensate, Na2S04 content of said naphthalene sulfonate formaldehyde condensate <3%; said composite foam stabilizer It is prepared according to the following parts by weight: 0.2 parts of ethylene glycol butyl ether, 0.3 parts of nano silicon, 0.5 parts of hydroxyhexyl cellulose; and the curing is adjusted by adjusting the weight fraction between the accelerator, the active activator and the water reducing agent. time.
本发明的粉煤灰固化泡沫材料的制备过程是： The preparation process of the fly ash solidified foam of the present invention is:
步骤一： 在专用混合容器 A中加入水 40-60份、 乙二醇丁醚 0.2份， 纳米硅 0.3份、 羟已基纤维素 0.5份， 搅拌器以 3000 ± 100转 /分钟转速转动， 搅拌时间为 2min， 形成匀 泡液； Step 1: Add 40-60 parts of water, 0.2 parts of ethylene glycol butyl ether, 0.3 parts of nano-silica, 0.5 parts of hydroxyhexyl cellulose to the special mixing container A, and stir the mixer at 3000 ± 100 rpm, stir The time is 2 min, forming a homogenization liquid;
步骤二： 在干混搅拌机 B中加入粉煤灰 100份， 铝氧熟料 1-2份、 碳酸钠 1份、 生 石灰 1-2份， 氧化镁 0.8-1.6份、 氯化镁 1.2-2.4份， 木质素磺酸钙 0.5-1份、 萘磺酸盐甲 醛缩合物 0.5-1份， 搅拌器以 3000 ± 100转 /分钟转速转动， 搅拌时间为 3min， 形成混合 粉体； Step 2: Add 100 parts of fly ash to dry blender B, 1-2 parts of aluminoxy clinker, 1 part of sodium carbonate, 1-2 parts of quicklime, 0.8-1.6 parts of magnesium oxide, 1.2-2.4 parts of magnesium chloride, wood 0.5-1 part of calcium sulfonate, 0.5-1 part of naphthalene sulfonate formaldehyde condensate, the stirrer is rotated at 3000 ± 100 rpm, and the stirring time is 3 min to form a mixed powder;
步骤三： 将干混搅拌机 B中的混合粉体混合加入专用混合容器 A中的匀泡液中， 专 用混合容器 A搅拌器以 12000 ±500转 /分钟转速转动，搅拌时间为 2min，形成混合浆液， 静置发泡， 制备成用于防治煤自燃的粉煤灰固化泡沫材料。 Step 3: Mix the mixed powder in the dry blender B into the homogenizing liquid in the special mixing container A. The special mixing container A stirrer rotates at 12000 ± 500 rpm, and the stirring time is 2 min to form a mixed slurry. , static foaming, prepared as a fly ash solidified foam for preventing spontaneous combustion of coal.
有益效果， 由于采用了上述方案， 本发明通过半水合硫酸钙、 碳酸氢钠在水中发生 化学反应产生惰性气体即二氧化碳气体来使浆液发泡；采用复合型稳泡剂即乙二醇丁醚， 纳米硅、 羟已基纤维素复配使料浆液中的固相颗粒均匀分散、 悬浮； 通过调整速凝剂、 活性激发剂、 减水剂之间的重量分数调节固化时间， 最终形成的粉煤灰固化泡沫流体材 料， 其轻质， 发泡倍数为 8〜15倍， 泡沫流体能均匀覆盖在松散煤岩体上、 裂隙渗透能 力强、 固化时间可调， 抗压强度大， 大于 1.5Mpa， 发泡反应过程中会释放一定量的惰性 气体即二氧化碳气体能够起到很好的稀释遗煤空间氧气浓度， 导热系数低、 能起到很好 的隔热效果， 操作工艺简单、 安全、 成本低。 能够快速包裹煤体并隔绝氧气， 有效封堵 漏风通道与煤体裂隙， 防治煤的氧化， 该材料对煤炭自燃防治工作具有重大意义。 [Advantageous Effects] Since the above scheme is adopted, the present invention foams a slurry by chemical reaction of calcium sulfate hemihydrate and sodium hydrogencarbonate in water to generate an inert gas, that is, carbon dioxide gas; a composite foam stabilizer, ethylene glycol butyl ether, is used. The nano-silicon and hydroxyhexyl cellulose are compounded to uniformly disperse and suspend the solid phase particles in the slurry; the curing time is adjusted by adjusting the weight fraction between the accelerator, the active activator and the water reducing agent, and the finally formed pulverized coal The ash-cured foam fluid material is light in weight and has a foaming ratio of 8 to 15 times. The foam fluid can be uniformly covered on the loose coal rock body, the crack penetration ability is strong, the curing time is adjustable, and the compressive strength is large, more than 1.5Mpa. During the foaming reaction, a certain amount of inert gas, ie carbon dioxide gas, can be released to dilute the oxygen concentration in the residual coal space. The thermal conductivity is low, and the thermal insulation effect is good. The operation process is simple, safe, and low in cost. . It can quickly wrap the coal body and isolate oxygen, effectively block the air leakage passage and coal body cracks, and prevent the oxidation of coal. This material is of great significance for the prevention and control of coal spontaneous combustion.
与现有技术相比， 本发明具有如下优点： Compared with the prior art, the present invention has the following advantages:
( 1 )本发明防治煤自燃的粉煤灰固化泡沫材料， 采用半水合硫酸钙， 碳酸氢钠， 水 三者的化学反应自产泡体系， 三者均属于环境友好型材料且产生的惰性气体（二氧化碳) 能够对遗煤氧化空间起到稀释氧气浓度的作用； (1) The fly ash solidified foam material for preventing spontaneous combustion of coal according to the present invention adopts a chemical reaction self-produced foam system of calcium sulfate hemihydrate, sodium hydrogencarbonate and water, all of which are environmentally friendly materials and generate inert gas. (CO2) can play a role in diluting the oxygen concentration in the oxidation space of the coal;
(2)本发明防治煤自燃的粉煤灰固化泡沫材料， 主要原材料为粉煤灰， 半水合硫酸
钙， 碳酸氢钠等来源广泛， 操作工艺简单； (2) The fly ash solidified foam material for preventing self-ignition of coal according to the invention, the main raw material is fly ash, hemihydrate sulfuric acid Calcium, sodium bicarbonate and other sources are widely available, and the operation process is simple;
(3 )本发明防治煤自燃的粉煤灰固化泡沫材料， 泡沫流体对煤体包裹性能好， 对裂 隙渗透性能好， 且凝固时间可调； (3) The fly ash solidified foam material for preventing self-ignition of coal according to the present invention, the foam fluid has good encapsulation performance for coal, has good permeability to cracks, and the solidification time is adjustable;
(4) 本发明防治煤自燃的粉煤灰固化泡沫材料， 轻质 （发泡倍数为 8〜15倍）， 抗 压强度大 （大于 1.5Mpa)， 导热系数低、 能起到很好的隔热效果， 在煤自燃防治领域具 有广泛的适用性。 (4) The fly ash solidified foam material for preventing coal spontaneous combustion is light (the foaming multiple is 8 to 15 times), the compressive strength is large (more than 1.5Mpa), the thermal conductivity is low, and the separation is good. The thermal effect has wide applicability in the field of coal spontaneous combustion prevention.
具体实施方式 detailed description
实施例 1 : 该粉煤灰固化泡沫材料， 包括以下各组分及重量份数： 水 40-60份、 粉煤 灰 100份、化学自产气复配粉体 25-40份、速凝剂 3-5份、活性激发剂 2-4份、减水剂 1-2 份、 复合型稳泡剂 1份； Example 1: The fly ash solidified foam material comprises the following components and parts by weight: water 40-60 parts, 100 parts of fly ash, chemical self-produced gas compound powder 25-40 parts, quick-setting agent 3-5 parts, 2-4 parts of active activator, 1-2 parts of water reducing agent, and 1 part of compound foam stabilizer;
所述的化学自产气复配粉体由半水合硫酸钙， 碳酸氢钠组成， 通过两者在水中反应 产生二氧化碳， 对浆液进行发泡。 两者按以下重量份配比制成： 半水合硫酸钙 24-35份， 碳酸氢钠 1-5份； 所述的速凝剂为铝氧熟料、 碳酸钠、 生石灰组成， 三者按以下重量份 配比制成： 铝氧熟料 1-2份， 碳酸钠 1份、 生石灰 1-2份， 所述的铝氧熟料重量百分比为 铝酸钠 94%、 氧化铝 4%、 铝硅酸钙 2%; 所述的活性激发剂为镁质材料固化剂， 为氧化 镁和氯化镁组成， 两者按以下重量份配比制成： 氧化镁 0.8-1.6份， 氯化镁 1.2-2.4份； 所 述的减水剂为木质素磺酸钙和萘磺酸盐甲醛缩合物， 两者按以下重量份配比制成： 木质 素磺酸钙 0.5-1份， 萘磺酸盐甲醛缩合物 0.5-1份， 所述的萘磺酸盐甲醛缩合物 Na2S04 含量 <3%； 所述的复合型稳泡剂由乙二醇丁醚， 纳米硅， 羟已基纤维素三者复配， 按以 下重量份配比制成： 乙二醇丁醚 0.2份， 纳米硅 0.3份、 羟已基纤维素 0.5份， 该复合稳 泡剂能使料浆中的固体微粒均匀分散、 悬浮且减少粉煤灰固化泡沫的上、 中、 下体积密 度差， 使气孔分布均匀， 显著改善气孔结构， 减少串孔。 The chemical self-generating gas compound powder is composed of calcium sulfate hemihydrate and sodium hydrogencarbonate, and carbon dioxide is generated by the reaction of both in the water to foam the slurry. The two are prepared according to the following parts by weight: 24-35 parts of calcium sulfate hemihydrate, 1-5 parts of sodium hydrogencarbonate; the quick-setting agent is composed of aluminoxy clinker, sodium carbonate and quicklime, the following are as follows: The ratio by weight is made up: 1-2 parts of aluminoxy clinker, 1 part of sodium carbonate, 1-2 parts of quicklime, the weight percentage of the aluminoxy clinker is 94% of sodium aluminate, 4% of alumina, aluminum silicon Calcium acid 2%; the active activator is a magnesium material curing agent, which is composed of magnesium oxide and magnesium chloride, and the two are prepared according to the following parts by weight: magnesium oxide 0.8-1.6 parts, magnesium chloride 1.2-2.4 parts; The water reducing agent is a calcium lignin sulfonate and a naphthalene sulfonate formaldehyde condensate, which are prepared in the following parts by weight: 0.5-1 part of calcium lignosulfonate, 0.5 phthalene sulfonate formaldehyde condensate 0.5- 1 part, the naphthalene sulfonate formaldehyde condensate Na2S04 content <3%; the composite foam stabilizer is compounded by ethylene glycol butyl ether, nano silicon, hydroxyhexyl cellulose, according to the following weight The ratio is made into: 0.2 parts of ethylene glycol butyl ether, 0.3 parts of nano silicon, 0.5 parts of hydroxyhexyl cellulose, the composite foam stabilizer The solid particles are uniformly dispersed in the slurry, suspension and the reduction in ash solidified foam bulk density, the lower the difference, so that a uniform pore distribution, pore structure significantly improved, reducing the string holes.
实施例 2: 首先， 在专用混合容器 A中加入水 50份、 乙二醇丁醚 0.2份， 纳米硅 0.3 份、 羟已基纤维素 0.5份， 搅拌器以 3000 ± 100转 /分钟转速转动， 搅拌时间为 2min， 形 成匀泡液； 然后， 在干混搅拌机 B中加入粉煤灰 100份， 铝氧熟料 1份、 碳酸钠 1份、 生石灰 1份， 氧化镁 1.2份、 氯化镁 1.8份， 木质素磺酸钙 0.5份、 萘磺酸盐甲醛缩合物 0.5份， 所述的萘磺酸盐甲醛缩合物 Na2S04含量 <3%， 所述的铝氧熟料重量百分比为铝 酸钠 94%、 氧化铝 4%、 铝硅酸钙 2%， 搅拌器以 3000 ± 100转 /分钟转速转动， 搅拌时间 为 3min， 形成混合粉体； 最后， 将干混搅拌机 B中的混合粉体混合加入专用混合容器 A
中的匀泡液中，专用混合容器 A搅拌器以 12000士 500转 /分钟转速转动，搅拌时间为 2min， 形成混合浆液， 静置发泡， 制备成用于防治煤自燃的粉煤灰固化泡沫材料。 用 3MPa的 地面移动式注浆泵将配制好的防治煤炭自燃的粉煤灰固化泡沫流体通过输送管路注入到 需要堵漏风的煤田火灾地表裂隙， 对煤体进行覆盖， 起到减少和控制漏风， 从而预防煤 炭自燃。 Example 2: First, 50 parts of water, 0.2 parts of ethylene glycol butyl ether, 0.3 parts of nano silicon, 0.5 parts of hydroxyhexyl cellulose, and a stirrer were rotated at 3000 ± 100 rpm in a dedicated mixing container A. The stirring time is 2 min to form a homogenizing liquid; then, 100 parts of fly ash, 1 part of aluminoxy clinker, 1 part of sodium carbonate, 1 part of quicklime, 1.2 parts of magnesium oxide and 1.8 parts of magnesium chloride are added to the dry mixing mixer B. 0.5 parts of calcium lignin sulfonate, 0.5 parts of naphthalene sulfonate formaldehyde condensate, the naphthalene sulfonate formaldehyde condensate Na 2 S0 4 content <3%, the aluminoxy clinker weight percentage is sodium aluminate 94%, 4% alumina, 2% calcium aluminosilicate, the stirrer rotates at 3000 ± 100 rpm, and the mixing time is 3 min to form a mixed powder. Finally, the mixed powder in the dry blender B is mixed. Add special mixing container A In the uniform foaming liquid, the special mixing container A stirrer rotates at a speed of 12,000 士500 rpm, and the stirring time is 2 min, forming a mixed slurry, which is statically foamed, and is prepared into a fly ash solidified foam for preventing spontaneous combustion of coal. material. The 3MPa ground moving grouting pump is used to inject the fly ash solidified foam fluid which is self-igniting coal to be injected into the surface crack of the coal field fire that needs to be trapped, and cover the coal body to reduce and control Leakage of air to prevent spontaneous combustion of coal.
实施例 3: 首先， 在专用混合容器 A中加入水 60份、 乙二醇丁醚 0.2份， 纳米硅 0.3 份、 羟已基纤维素 0.5份， 搅拌器以 3000 ± 100转 /分钟转速转动， 搅拌时间为 2min， 形 成匀泡液； 然后， 在干混搅拌机 B中加入粉煤灰 100份， 铝氧熟料 2份、 碳酸钠 1份、 生石灰 2份， 氧化镁 1.6份、 氯化镁 2.4份， 木质素磺酸钙 1份、 萘磺酸盐甲醛缩合物 1 份， 所述的萘磺酸盐甲醛缩合物 Na2S04含量 <3%， 所述的铝氧熟料重量百分比为铝酸钠 94%、氧化铝 4%、铝硅酸钙 2%，搅拌器以 3000士 100转 /分钟转速转动，搅拌时间为 3min， 形成混合粉体； 最后， 将干混搅拌机 B中的混合粉体混合加入专用混合容器 A中的匀泡 液中， 专用混合容器 A搅拌器以 12000 ±500转 /分钟转速转动， 搅拌时间为 2min， 形成 混合浆液， 静置发泡， 制备成用于防治煤自燃的粉煤灰固化泡沫材料。 用 2MPa的井下 移动式注浆泵将配制好的防治煤炭自燃的粉煤灰固化泡沫流体通过输送管路注入施工的 井下采空区注浆钻孔， 到达松散煤体表面， 起到隔绝煤氧复合的作用， 从而预防煤炭自 燃。
Example 3: First, 60 parts of water, 0.2 parts of ethylene glycol butyl ether, 0.3 parts of nano silicon, 0.5 parts of hydroxyhexyl cellulose, and a stirrer were rotated at 3000 ± 100 rpm in a dedicated mixing container A. The stirring time is 2 min to form a homogenizing liquid; then, 100 parts of fly ash, 2 parts of aluminoxy clinker, 1 part of sodium carbonate, 2 parts of quicklime, 1.6 parts of magnesium oxide and 2.4 parts of magnesium chloride are added to the dry mixing mixer B. 1 part of calcium lignin sulfonate, 1 part of naphthalene sulfonate formaldehyde condensate, the content of Na 2 S0 4 of the naphthalene sulfonate formaldehyde condensate is less than 3%, and the weight percentage of the aluminoxy clinker is sodium aluminate 94%, 4% alumina, 25% calcium aluminosilicate, the stirrer rotates at 3000 rpm at 100 rpm, and the mixing time is 3 min to form a mixed powder. Finally, the mixed powder in the dry blender B is mixed. Adding to the homogenizing liquid in the special mixing container A, the special mixing container A stirrer rotates at 12000 ± 500 rpm, and the stirring time is 2 min, forming a mixed slurry, which is statically foamed, and is prepared for preventing spontaneous combustion of coal. Fly ash solidified foam. Using a 2MPa downhole mobile grouting pump, the prepared fly ash solidified foam fluid for preventing spontaneous combustion of coal is injected into the underground goaf of the construction through the conveying pipeline to grout the borehole to reach the surface of the loose coal body, thereby shielding the coal oxygen. The role of the compound to prevent spontaneous combustion of coal.
Claims
1、 一种防治煤自燃的粉煤灰固化泡沫材料， 其特征是： 该粉煤灰固化泡沫材料， 包 括以下各组分及重量份数： 水 40-60 份、 粉煤灰 100 份、 化学自产气复配粉体 25-40 份、 速凝剂 3-5份、 活性激发剂 2-4份、 减水剂 1-2份、 复合型稳泡剂 1份； 1. A fly ash solidified foam material for preventing spontaneous coal combustion, characterized by: The fly ash solidified foam material includes the following components and parts by weight: 40-60 parts of water, 100 parts of fly ash, chemical 25-40 parts of self-produced gas compound powder, 3-5 parts of accelerator, 2-4 parts of active activator, 1-2 parts of water reducing agent, 1 part of compound foam stabilizer;
所述的化学自产气复配粉体按以下重量份配比制成： 半水合硫酸钙 24-35 份， 碳酸 氢钠 1-5 份， 由两者发生化学反应产生惰性气体即二氧化碳气体来使浆液发泡； 所述的 速凝剂按以下重量份配比制成： 铝氧熟料 1-2份， 碳酸钠 1份、 生石灰 1-2份， 所述的 铝氧熟料重量百分比为铝酸钠 94%、 氧化铝 4%、 铝硅酸钙 2%; 所述的活性激发剂按以下 重量份配比制成： 氧化镁 0. 8-1. 6 份， 氯化镁 1. 2-2. 4 份； 所述的减水剂为按以下重量 份配比制成： 木质素磺酸钙 0. 5-1 份， 萘磺酸盐甲醛缩合物 0. 5-1 份， 所述的萘磺酸盐 甲醛缩合物 N¾S04 含量〈3%; 所述的复合型稳泡剂按以下重量份配比制成： 乙二醇丁醚 0. 2份， 纳米硅 0. 3份、 羟已基纤维素 0. 5份； 通过调整速凝剂、 活性激发剂、 减水剂之 间的重量份数调节固化时间。 The chemical self-generated gas compound powder is made according to the following weight proportions: 24-35 parts of calcium sulfate hemihydrate, 1-5 parts of sodium bicarbonate, which are produced by a chemical reaction between the two to produce inert gas, that is, carbon dioxide gas. Foam the slurry; the accelerating setting agent is made according to the following weight ratio: 1-2 parts of alumina clinker, 1 part of sodium carbonate, 1-2 parts of quicklime, the weight percentage of the alumina clinker is Sodium aluminate 94%, aluminum oxide 4%, calcium aluminosilicate 2%; the active activator is made according to the following weight parts: magnesium oxide 0.8-1.6 parts, magnesium chloride 1.2-2 . 4 parts; The water reducing agent is made according to the following weight parts: 0.5-1 parts of calcium lignosulfonate, 0.5-1 parts of naphthalene sulfonate formaldehyde condensate, the described naphthalene The content of sulfonate formaldehyde condensate N¾S04 is <3%; the composite foam stabilizer is made according to the following weight ratio: 0.2 parts of ethylene glycol butyl ether, 0.3 parts of nano silicon, hydroxyhexyl fiber 0.5 parts of prime; adjust the curing time by adjusting the weight parts of accelerating agent, active activator and water reducing agent.
2、 一种权利要求 1所述的防治煤自燃的粉煤灰固化泡沫材料的制备方法， 其特征在 于： 2. A method for preparing fly ash solidified foam materials for preventing spontaneous coal combustion according to claim 1, characterized by:
步骤一： 在专用混合容器 A 中加入水 40-60 份、 乙二醇丁醚 0. 2 份， 纳米硅 0. 3 份、 羟已基纤维素 0. 5份， 搅拌器以 3000 ± 100转 /分钟转速转动， 搅拌时间为 2min， 形 成匀泡液； Step 1: Add 40-60 parts of water, 0.2 parts of ethylene glycol butyl ether, 0.3 parts of nano silicon, and 0.5 parts of hydroxyhexyl cellulose into the special mixing container A, and rotate the stirrer at 3000 ± 100 /min speed rotation, stirring time is 2min, to form a homogenizing solution;
步骤二： 在干混搅拌机 B中加入粉煤灰 100份， 铝氧熟料 1-2份、 碳酸钠 1份、 生 石灰 1-2份， 氧化镁 0. 8-1. 6份、 氯化镁 1. 2-2. 4份， 木质素磺酸钙 0. 5-1份、 萘磺酸 盐甲醛缩合物 0. 5-1份， 搅拌器以 3000 ± 100转 /分钟转速转动， 搅拌时间为 3min， 形成 混合粉体； Step 2: Add 100 parts of fly ash, 1-2 parts of alumina clinker, 1 part of sodium carbonate, 1-2 parts of quicklime, 0.8-1.6 parts of magnesium oxide, and 1.6 parts of magnesium chloride into the dry mixer B. 2-2.4 parts, calcium lignosulfonate 0.5-1 part, naphthalene sulfonate formaldehyde condensate 0.5-1 part, the stirrer rotates at 3000 ± 100 rpm, the stirring time is 3 minutes, Form mixed powder;
步骤三： 将干混搅拌机 B中的混合粉体混合加入专用混合容器 A中的匀泡液中， 专 用混合容器 A搅拌器以 12000 ± 500 转 /分钟转速转动， 搅拌时间为 2min， 形成混合浆 液， 静置发泡， 制备成用于防治煤自燃的粉煤灰固化泡沫材料。
Step 3: Mix the mixed powder in the dry mixer B and add it to the homogenizing liquid in the special mixing container A. The mixer of the special mixing container A rotates at 12000 ± 500 rpm, and the mixing time is 2 minutes to form a mixed slurry. , left to foam, and prepared into fly ash solidified foam materials for preventing and controlling coal spontaneous combustion.
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| CA2879374A CA2879374C (en) | 2013-07-17 | 2014-03-26 | Coal ash solidified foam material for preventing spontaneous combustion of coal and preparation method thereof |
| AU2014292751A AU2014292751B2 (en) | 2013-07-17 | 2014-03-26 | Coal ash solidification foam material used for prevention and treatment of spontaneous combustion of coal and preparation method therefor |
| RU2014143658/03A RU2588588C2 (en) | 2013-07-17 | 2014-03-26 | Hardening foam material containing coal ash, for preventing coal self-ignition and preparation method thereof |
| ZA2014/08380A ZA201408380B (en) | 2013-07-17 | 2014-11-13 | Coal ash solidification foam material used for prevention and treatment of spontaneous combustion of coal and preparation method therefor |
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| CN201310298775.7A CN103387410B (en) | 2013-07-17 | 2013-07-17 | Fly ash solidified foam material for preventing coal spontaneous combustion and preparation method thereof |
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| CN103387410B (en) * | 2013-07-17 | 2014-10-15 | 中国矿业大学 | Fly ash solidified foam material for preventing coal spontaneous combustion and preparation method thereof |
| CN103964766B (en) * | 2014-04-29 | 2016-09-14 | 胡相明 | Flyash-cement foam material of preventing and treating spontaneous combustionof coal and preparation method thereof |
| CN104446624B (en) * | 2014-11-26 | 2016-08-17 | 高万水 | Colliery reinforces compositions and using method thereof and purposes with inorganic foamed filling |
| CN106437817B (en) * | 2015-08-12 | 2019-01-04 | 华北科技学院 | It is a kind of to have the coal road filling colloidal materials and its application method for relapsing function |
| CN108678801B (en) * | 2018-05-25 | 2020-04-14 | 中国矿业大学 | Blocking type slurry material for preventing and treating coal spontaneous combustion fly ash alkali metal chelation hardening |
| CN110564391B (en) * | 2019-08-31 | 2021-06-29 | 湖南科技大学 | Nano microbubble material for in-situ consolidation modification of pulverized coal and preparation method thereof |
| CN111153657A (en) * | 2020-02-21 | 2020-05-15 | 济南鸿运保温材料有限公司 | Building energy-saving foaming insulation board and preparation method thereof |
| CN113213821B (en) * | 2021-06-07 | 2022-03-25 | 中国矿业大学 | High-stability colloidal foam for inhibiting self-heating of oxidation of loose coal body and preparation method thereof |
| CN115120922B (en) * | 2022-06-27 | 2023-05-16 | 中煤科工集团西安研究院有限公司 | Modified gangue-based fire prevention and extinguishment three-phase foam material, preparation method and application |
| CN115337588B (en) * | 2022-09-16 | 2023-06-16 | 中国矿业大学 | Fly ash-based fire preventing and extinguishing material for mineralizing and sequestering carbon dioxide and preparation method thereof |
| CN115849839B (en) * | 2022-11-24 | 2023-10-31 | 湖南科技大学 | Repairing foam for goaf closed fracture plugging and preparation method thereof |
| CN115925381B (en) * | 2022-11-28 | 2024-06-25 | 中国矿业大学 | Calcium-based solid waste light composite slurry for disaster reduction and carbon dioxide sequestration of coal mine and preparation and use methods thereof |
| CN115970220A (en) * | 2023-02-07 | 2023-04-18 | 湖南科技大学 | Inorganic curing foam for preventing and treating forest fire and preparation method thereof |
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