CN116639945A - Method for preparing cemented filling material by utilizing multi-source industrial waste residues and superfine tailings - Google Patents
Method for preparing cemented filling material by utilizing multi-source industrial waste residues and superfine tailings Download PDFInfo
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- CN116639945A CN116639945A CN202310682613.7A CN202310682613A CN116639945A CN 116639945 A CN116639945 A CN 116639945A CN 202310682613 A CN202310682613 A CN 202310682613A CN 116639945 A CN116639945 A CN 116639945A
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- 239000000463 material Substances 0.000 title claims abstract description 157
- 238000011049 filling Methods 0.000 title claims abstract description 102
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000002440 industrial waste Substances 0.000 title claims abstract description 16
- 239000002893 slag Substances 0.000 claims abstract description 106
- 239000002910 solid waste Substances 0.000 claims abstract description 82
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 38
- 239000010959 steel Substances 0.000 claims abstract description 38
- 239000010881 fly ash Substances 0.000 claims abstract description 36
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 35
- 239000010440 gypsum Substances 0.000 claims abstract description 35
- 238000012360 testing method Methods 0.000 claims abstract description 28
- 239000002994 raw material Substances 0.000 claims abstract description 23
- 238000003756 stirring Methods 0.000 claims abstract description 23
- 238000002156 mixing Methods 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000005303 weighing Methods 0.000 claims abstract description 16
- 238000001035 drying Methods 0.000 claims abstract description 9
- 239000004568 cement Substances 0.000 claims abstract description 7
- 238000000227 grinding Methods 0.000 claims abstract description 6
- 239000000843 powder Substances 0.000 claims description 13
- 239000004576 sand Substances 0.000 claims description 11
- 238000006477 desulfuration reaction Methods 0.000 claims description 9
- 230000023556 desulfurization Effects 0.000 claims description 9
- 239000002002 slurry Substances 0.000 claims description 8
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 5
- 239000011707 mineral Substances 0.000 claims description 5
- 238000005065 mining Methods 0.000 claims description 5
- 238000013461 design Methods 0.000 claims description 4
- 238000000540 analysis of variance Methods 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical group O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 claims description 2
- 238000005345 coagulation Methods 0.000 claims description 2
- 230000015271 coagulation Effects 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 238000007711 solidification Methods 0.000 claims description 2
- 230000008023 solidification Effects 0.000 claims description 2
- 229910004298 SiO 2 Inorganic materials 0.000 claims 3
- 239000012190 activator Substances 0.000 claims 3
- 239000002585 base Substances 0.000 claims 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims 2
- 229910021532 Calcite Inorganic materials 0.000 claims 2
- 239000003513 alkali Substances 0.000 claims 1
- 150000001447 alkali salts Chemical class 0.000 claims 1
- 229910052918 calcium silicate Inorganic materials 0.000 claims 1
- 235000012241 calcium silicate Nutrition 0.000 claims 1
- JHLNERQLKQQLRZ-UHFFFAOYSA-N calcium silicate Chemical compound [Ca+2].[Ca+2].[O-][Si]([O-])([O-])[O-] JHLNERQLKQQLRZ-UHFFFAOYSA-N 0.000 claims 1
- 239000002131 composite material Substances 0.000 claims 1
- BCAARMUWIRURQS-UHFFFAOYSA-N dicalcium;oxocalcium;silicate Chemical compound [Ca+2].[Ca+2].[Ca]=O.[O-][Si]([O-])([O-])[O-] BCAARMUWIRURQS-UHFFFAOYSA-N 0.000 claims 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims 1
- 229910052863 mullite Inorganic materials 0.000 claims 1
- 239000010453 quartz Substances 0.000 claims 1
- 150000003839 salts Chemical class 0.000 claims 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims 1
- 229910021534 tricalcium silicate Inorganic materials 0.000 claims 1
- 235000019976 tricalcium silicate Nutrition 0.000 claims 1
- 238000004064 recycling Methods 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 description 8
- 238000009472 formulation Methods 0.000 description 5
- 239000010687 lubricating oil Substances 0.000 description 5
- 238000007790 scraping Methods 0.000 description 5
- 239000008399 tap water Substances 0.000 description 5
- 235000020679 tap water Nutrition 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000945 filler Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000011398 Portland cement Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000003469 silicate cement Substances 0.000 description 1
- 239000007790 solid phase 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
- 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
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/0481—Other specific industrial waste materials not provided for elsewhere in C04B18/00
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. fly ash
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/12—Waste materials; Refuse from quarries, mining or the like
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
- C04B18/142—Steelmaking slags, converter slags
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/005—Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
-
- 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
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Combustion & Propulsion (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The application relates to a method for preparing a cemented filling material by utilizing multi-source industrial waste residues and superfine tailings. The method comprises the following steps: s1, drying steel slag, fly ash, carbide slag, desulfurized gypsum and blast furnace slag, putting into a ball mill, grinding to a preset gradation, weighing raw materials according to a proportion, and uniformly mixing to form an industrial solid waste base cementing material; s2, mixing the superfine tailings, the industrial solid waste base cementing material and water, and uniformly stirring to obtain a cementing filling material; s3, curing the prepared filling material for 3 days and 28 days under standard conditions, and performing uniaxial compressive strength test to evaluate the performance of the cemented filling material. The industrial solid waste-based cementing material is prepared by taking blast furnace slag as a main body and mixing with steel slag, fly ash, carbide slag and desulfurized gypsum, cement or clinker is not added, the cementing material is suitable for the engineering of preparing the cementing filling material from fine-fraction tailings, the uniaxial compressive strength of the cementing filling material is respectively greater than 1MPa and 2.0MPa in 3 days and 28 days, and the harmless treatment and recycling of large solid wastes can be promoted.
Description
Technical Field
The application relates to the field of industrial solid waste resource utilization and cement filling material preparation, in particular to a method for preparing a cement filling material by utilizing steel slag, fly ash, carbide slag, desulfurized gypsum and blast furnace slag to cooperate with superfine tailings.
Background
The tailings are one of solid wastes generated in the mine beneficiation process, the discharge amount of the tailings is large, and the main treatment mode is to stack the tailings at the surface of the ground. At present, the tailing stocking amount in China exceeds 200 hundred million tons, the annual increment exceeds 10 hundred million tons, and compared with other industrial solid wastes, the tailing utilization rate is at a lower level.
The filling mining method can control the ground pressure to a certain extent, prevent the earth surface from collapsing, slow down the influence of underground mining activities on the earth surface ecological environment, and effectively treat solid wastes such as waste rocks, tailings and the like discharged in mine production. The cemented filling material is generally prepared by mixing aggregate (tailings and waste rocks), cementing material and water according to a certain proportion, and is conveyed to a downhole goaf by means of a pumping pipeline system, so that the treatment of large-volume solid waste is realized. Previous studies have shown that the particle size distribution of a filler aggregate as one of the solid phase components of a cementitious filler material has a significant impact on the flow and mechanical properties of the filler material.
With the continuous development of mineral separation processes and technical equipment, a rough concentrate regrinding process is gradually applied to the separation of ores, which directly leads to the remarkable increase of the content of < 37 mu m in tailings discharged from a mill, and the grain composition gradually tends to be ultra-fine. Because of the large specific surface area, when the fine-fraction tailing sand is used as filling aggregate to prepare the cementing filling material, the slurry has large water demand and low concentration, and the ordinary silicate cement is used as the cementing material, the curing effect on the fine-fraction tailing sand is poor, the coagulation is slow, the dosage is large and the like, so that the cementing material suitable for solidifying the fine-fraction tailing sand is necessary to be developed.
On the other hand, a large amount of solid wastes such as steel slag and slag generated by smelting steel or other metals can be generated in the industrial production process; fly ash generated by combustion of pulverized coal in a power plant, desulfurization gypsum formed by flue gas desulfurization, and the like. At present, the accumulated stock of large solid wastes in China is about 600 hundred million tons, the newly increased stock of the large solid wastes in the year is about 30 hundred million tons, and the utilization rate of the solid wastes such as red mud, phosphogypsum, steel slag and the like is still low. A large amount of industrial solid waste resource is piled on the ground surface, occupies precious land resources, and has environmental pollution and potential safety hazard. In recent years, china has established a series of strict laws and regulations and policies to promote reduction of solid waste sources, recycling and harmless disposal.
Related researches show that some industrial solid wastes such as steel slag, fly ash and the like generally contain a large amount of aluminum-silicon components, and the industrial solid wastes show a certain hydration activity after chemical excitation or physical excitation and can be used as raw materials for preparing cementing materials. Because of its wide source and low cost, it has been widely used in the industry of building materials.
Based on the background, the industrial solid waste such as steel slag, fly ash and the like is utilized to prepare the cemented filling material, and the cemented filling material is filled into an underground goaf, so that a large amount of industrial solid waste can be consumed, the harmless and recycling utilization of a large amount of solid waste can be realized, and meanwhile, the filling mining cost can be reduced, and certain environmental, economic and social benefits are realized.
Disclosure of Invention
The application discloses a method for preparing a cemented filling material by utilizing industrial waste residues and superfine tailings, which aims to solve the problems of related technologies and other potential technologies at least to a certain extent.
In order to solve the technical problems, the application provides the following technical scheme:
a method for preparing a cementing filling material by utilizing multi-source industrial waste residues and superfine tailings, wherein the cementing filling material consists of the superfine tailings, industrial solid waste base cementing material and water; wherein, the industrial solid waste-based cementing material accounts for 6.5 to 12.5 percent of the total mass of the filling material, the water accounts for 37 to 40 percent of the total mass of the filling material, and the balance is superfine tailings.
The industrial solid waste-based cementing material consists of steel slag, fly ash, carbide slag, desulfurized gypsum and blast furnace slag, wherein the five components are respectively in parts by weight: 5-20 parts of steel slag, 5-20 parts of fly ash, 16-22 parts of carbide slag, 0-3 parts of desulfurized gypsum and 40-74 parts of blast furnace slag.
The application provides a method for preparing a cemented filling material by utilizing industrial waste residues and superfine tailings, which comprises the following specific steps:
s1, taking steel slag, fly ash, carbide slag, desulfurized gypsum and blast furnace slag as raw materials, firstly putting the raw materials into a drying box for drying treatment, then putting the raw materials into a ball mill for grinding to obtain raw material powder, and designing an orthogonal test to prepare an industrial solid waste base cementing material;
s2, respectively weighing superfine tailings, industrial solid waste-based cementing materials and water according to a design proportioning scheme, and then putting the superfine tailings, the industrial solid waste-based cementing materials and the water into a rubber sand mixer for mixing and uniformly stirring to form a cementing filling material;
and S3, curing the prepared filling material for 3 days and 28 days under standard conditions, performing uniaxial compressive strength test, and evaluating the performance of the cemented filling material based on the range and analysis of variance so as to determine the optimal proportioning scheme of the cemented filling material.
The specific surface area of the powder of the steel slag in the step S1 is 400m 2 Per kg, the powder specific surface area of the blast furnace slag is 420m 2 Per kg, the specific surface area of the powder of the fly ash is 380m 2 Per kg, the specific surface area of the powder of the carbide slag is 360m 2 Per kg, powder specific surface area of desulfurization gypsum 350m 2 /kg。
The beneficial effects of the application are as follows:
(1) Fine fraction tailing solidification effect is good: according to the method for preparing the cemented filling material by utilizing the superfine tailings with the average grain diameter smaller than 0.019mm, disclosed by the application, the cemented filling material is prepared by utilizing the superfine tailings with the average grain diameter smaller than 0.019mm, the uniaxial compressive strength of 3 days under standard maintenance conditions is larger than 1MPa, the 28-day strength is larger than 2MPa, the early strength of a filling body is high, and the strength can meet the requirements on the strength of the filling material under most different mining conditions of mines.
(2) Under the same conditions, the multi-source industrial solid waste-based cementing material disclosed by the application is prepared from the steel slag, the fly ash, the carbide slag, the desulfurized gypsum and the blast furnace slag which are all industrial solid wastes, has wide raw material sources, low price and environmental friendliness according to a certain proportion, can completely replace cement to be used for preparing the cementing filling material, and has the mixing amount ranging from 6.5% to 12.5% of the total mass of the filling material. According to calculation, the material cost of the multi-source industrial solid waste-based cementing material is 140-200 yuan/ton, the market price of the conventional Portland cement is about 400-500 yuan/ton, the purpose of completely replacing the conventional Portland cement can be achieved by utilizing the multi-source industrial solid waste-based cementing material, meanwhile, a large amount of industrial waste residues can be consumed, the recycling of large amounts of solid waste is promoted, and the multi-source industrial solid waste-based cementing material has higher economic and environmental protection values.
Drawings
FIG. 1 is a flow chart of a process for preparing a cemented filling material by utilizing multi-source industrial waste residues and superfine tailings.
FIG. 2 is a graph showing the particle size distribution of the very fine tailings used in the examples of the present application.
FIG. 3 is an X-ray diffraction analysis chart of the multi-source industrial solid waste used in the example of the present application.
Detailed Description
The application is further illustrated by the following examples, which are set forth to illustrate, but are not to be construed as limiting the application unless otherwise specified.
Scientific and technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application relates.
A method for preparing a cementing filling material by utilizing multi-source industrial waste residues and superfine tailings, wherein the filling material consists of the superfine tailings, industrial solid waste-based cementing material and water; wherein, the industrial solid waste-based cementing material accounts for 6.5 to 12.5 percent of the total mass of the filling material, the water accounts for 37 to 40 percent of the total mass of the filling material, and the balance is superfine tailings.
The industrial solid waste-based cementing material consists of steel slag, fly ash, carbide slag, desulfurized gypsum and blast furnace slag, wherein the components are respectively in parts by weight: 5-20 parts of steel slag, 5-20 parts of fly ash, 16-22 parts of carbide slag, 0-3 parts of desulfurized gypsum and 40-74 parts of blast furnace slag.
The application provides a method for preparing a cemented filling material by utilizing multi-source industrial waste residues and superfine tailings, which comprises the following specific steps:
s1, placing raw materials of steel slag, fly ash, carbide slag, desulfurized gypsum and slag into a drying box with the temperature of 50 ℃ for drying, removing excessive moisture until the quality is stable, and then placing into a ball mill for grinding, wherein the specific surface area of the powder of the steel slag, blast furnace slag, fly ash, carbide slag and desulfurized gypsum is 400m 2 /kg、420m 2 /kg、380m 2 /kg、360m 2 /kg、350m 2 Mixing the ground materials uniformly according to a design proportion to obtain the industrial solid waste base cementing material;
s2, respectively weighing superfine tailings, industrial solid waste-based cementing materials and water according to the experimental scheme requirements, respectively putting the superfine tailings, the industrial solid waste-based cementing materials and the water into a sand mixer, and mixing at a low speed and then rapidly to obtain cemented filling slurry, namely the cemented filling material prepared by combining various industrial waste residues with the superfine tailings;
s3, curing the prepared filling material for 3 days and 28 days under standard conditions, performing uniaxial compressive strength test, and evaluating the performance of the cemented filling material based on the range and analysis of variance so as to determine the optimal proportioning scheme of the cemented filling material.
In examples 1, 2, 3, 4 and 5, the extremely fine tailings used in the experiments were obtained from a gold mine in Shandong province of China, the main chemical compositions are shown in Table 1, the industrial waste residues including steel slag, fly ash, carbide slag, desulfurized gypsum and slag were obtained from factories near the gold mine, and the main oxide compositions of the raw materials are shown in Table 1.
TABLE 1 Main oxide Components (unit%) of raw materials
Example 1:
the cementing filling material is prepared from the following raw materials in parts by weight: the superfine tailing accounts for 50.4% of the total mass of the filling material, the industrial solid waste-based cementing material accounts for 12.6% of the total mass of the filling material, and the water accounts for 37% of the total mass of the filling material, wherein the industrial solid waste-based cementing material consists of 5 parts of steel slag, 10 parts of fly ash, 18 parts of carbide slag, 1 part of desulfurized gypsum and 66 parts of blast furnace slag.
The proportion scheme of the cemented filling material is shown in table 1, and the filling material comprises superfine tailings: the proportion of the industrial solid waste-based cementing material is 4:1, the mass concentration is 63%, wherein, steel slag in the industrial solid waste base cementing material: fly ash: carbide slag: desulfurization gypsum: the mass ratio of blast furnace slag is 5:10:18:1:66.
firstly, respectively weighing steel slag, fly ash, carbide slag, desulfurized gypsum and blast furnace slag according to the table 2, and uniformly mixing and stirring to obtain the industrial solid waste base cementing material for standby.
Respectively weighing superfine tailings and industrial solid waste-based cementing materials according to the table 2, uniformly mixing, pouring into a rubber sand stirrer, finally adding ordinary tap water, continuously stirring, and stirring for at least 5min at a revolution speed of 125+/-5 r/min; after stirring, pouring the filling slurry into a standard cylindrical test mould (phi 50 multiplied by 100 mm) uniformly coated with lubricating oil, vibrating uniformly, scraping, placing in a standard (temperature: 20 ℃ C., humidity: more than 90%) curing box, demolding after 24 hours, placing the demolded filling body test block into the curing box for continuous curing for 3 days and 28 days, and carrying out a uniaxial compressive strength test, wherein the results are shown in Table 2.
TABLE 2 cemented filling material formulation and uniaxial compressive Strength test results
Example 2:
the cementing filling material is prepared from the following raw materials in parts by weight: the superfine tailing accounts for 50.4% of the total mass of the filling material, the industrial solid waste-based cementing material accounts for 12.6% of the total mass of the filling material, and the water accounts for 37% of the total mass of the filling material, wherein the industrial solid waste-based cementing material consists of 10 parts of steel slag, 5 parts of fly ash, 18 parts of carbide slag, 2 parts of desulfurized gypsum and 65 parts of blast furnace slag.
The proportion scheme of the cemented filling material is shown in table 1, and the filling material comprises superfine tailings: the proportion of the industrial solid waste-based cementing material is 4:1, the mass concentration is 63%, wherein, steel slag in the industrial solid waste base cementing material: fly ash: carbide slag: desulfurization gypsum: the mass ratio of blast furnace slag is 10:5:18:2:65.
firstly, respectively weighing steel slag, fly ash, carbide slag, desulfurized gypsum and blast furnace slag according to the table 3, and uniformly mixing and stirring to obtain the industrial solid waste base cementing material for standby.
Respectively weighing superfine tailings and industrial solid waste-based cementing materials according to a table 3, uniformly mixing, pouring into a rubber sand stirrer, finally adding ordinary tap water, continuously stirring, and stirring for at least 5min at a revolution speed of 125+/-5 r/min; after stirring, pouring the filling slurry into a standard cylindrical test mould (phi 50 multiplied by 100 mm) uniformly coated with lubricating oil, vibrating uniformly, scraping, placing in a standard (temperature: 20 ℃ C., humidity: more than 90%) curing box, demolding after 24 hours, placing the demolded filling body test block into the curing box for continuous curing for 3 days and 28 days, and carrying out a uniaxial compressive strength test, wherein the results are shown in Table 3.
TABLE 3 cement filling material formulation and uniaxial compressive strength test results
Example 3:
the cementing filling material is prepared from the following raw materials in parts by weight: the superfine tailing accounts for 50.4% of the total mass of the filling material, the industrial solid waste-based cementing material accounts for 12.6% of the total mass of the filling material, and the water accounts for 37% of the total mass of the filling material, wherein the industrial solid waste-based cementing material consists of 10 parts of steel slag, 10 parts of fly ash, 20 parts of carbide slag, 3 parts of desulfurized gypsum and 57 parts of blast furnace slag.
The proportion scheme of the cemented filling material is shown in table 1, and the filling material comprises superfine tailings: the mass ratio of the industrial solid waste-based cementing material is 4:1, the mass concentration is 63%, wherein, steel slag in the industrial solid waste base cementing material: fly ash: carbide slag: desulfurization gypsum: the mass ratio of blast furnace slag is 10:10:20:3:57.
firstly, respectively weighing steel slag, fly ash, carbide slag, desulfurized gypsum and blast furnace slag according to the table 4, and uniformly mixing and stirring to obtain the industrial solid waste base cementing material for standby.
Respectively weighing superfine tailings and industrial solid waste-based cementing materials according to the table 4, uniformly mixing, pouring into a rubber sand stirrer, finally adding ordinary tap water, continuously stirring, and stirring for at least 5min at the revolution speed of 125+/-5 r/min; after stirring, pouring the filling slurry into a standard cylindrical test mould (phi 50 multiplied by 100 mm) uniformly coated with lubricating oil, vibrating uniformly, scraping, placing in a standard (temperature: 20 ℃ C., humidity: more than 90%) curing box, demolding after 24 hours, placing the demolded filling body test block into the curing box for continuous curing for 3 days and 28 days, and carrying out a uniaxial compressive strength test, wherein the results are shown in Table 4.
TABLE 4 cemented filling material formulation and uniaxial compressive Strength test results
Example 4:
the cementing filling material is prepared from the following raw materials in parts by weight: the superfine tailing accounts for 50.4% of the total mass of the filling material, the industrial solid waste-based cementing material accounts for 12.6% of the total mass of the filling material, and the water accounts for 37% of the total mass of the filling material, wherein the industrial solid waste-based cementing material consists of 10 parts of steel slag, 10 parts of fly ash, 20 parts of carbide slag, 3 parts of desulfurized gypsum and 57 parts of blast furnace slag.
The proportion scheme of the cemented filling material is shown in table 1, and the filling material comprises superfine tailings: the proportion of the industrial solid waste-based cementing material is 4:1, the mass concentration is 63%, wherein, steel slag in the industrial solid waste base cementing material: fly ash: carbide slag: desulfurization gypsum: the mass ratio of blast furnace slag is 15:5:22:0:53.
firstly, respectively weighing steel slag, fly ash, carbide slag, desulfurized gypsum and blast furnace slag according to the table 5, and uniformly mixing and stirring to obtain the industrial solid waste base cementing material for standby.
Respectively weighing superfine tailings and industrial solid waste-based cementing materials according to a table 5, uniformly mixing, pouring into a rubber sand stirrer, finally adding ordinary tap water, continuously stirring, and stirring for at least 5min at a revolution speed of 125+/-5 r/min; after stirring, pouring the filling slurry into a standard cylindrical test mould (phi 50 multiplied by 100 mm) uniformly coated with lubricating oil, vibrating uniformly, scraping, placing in a standard (temperature: 20 ℃ C., humidity: more than 90%) curing box, demolding after 24 hours, placing the demolded filling body test block into the curing box for continuous curing for 3 days and 28 days, and carrying out a uniaxial compressive strength test, wherein the results are shown in Table 5.
TABLE 5 cemented filling material formulation and uniaxial compressive strength test results
Example 5:
the cementing filling material is prepared from the following raw materials in parts by weight: the superfine tailing accounts for 50.4% of the total mass of the filling material, the industrial solid waste-based cementing material accounts for 12.6% of the total mass of the filling material, and the water accounts for 37% of the total mass of the filling material, wherein the industrial solid waste-based cementing material consists of 20 parts of steel slag, 10 parts of fly ash, 16 parts of carbide slag, 2 parts of desulfurized gypsum and 52 parts of blast furnace slag.
The proportion scheme of the cemented filling material is shown in table 1, and the filling material comprises superfine tailings: the proportion of the industrial solid waste-based cementing material is 4:1, the mass concentration is 63%, wherein, steel slag in the industrial solid waste base cementing material: fly ash: carbide slag: desulfurization gypsum: the mass ratio of the blast furnace slag is 20:10:16:2:52.
firstly, respectively weighing steel slag, fly ash, carbide slag, desulfurized gypsum and blast furnace slag according to a table 6, and uniformly mixing and stirring to obtain an industrial solid waste base cementing material for standby.
Respectively weighing superfine tailings and industrial solid waste-based cementing materials according to a table 6, uniformly mixing, pouring into a rubber sand stirrer, finally adding ordinary tap water, continuously stirring, and stirring for at least 5min at a revolution speed of 125+/-5 r/min; after stirring, pouring the filling slurry into a standard cylindrical test mould (phi 50 multiplied by 100 mm) uniformly coated with lubricating oil, vibrating uniformly, scraping, placing in a standard (temperature: 20 ℃ C., humidity: more than 90%) curing box for 24 hours, demolding, placing the demolded filling body test block into the curing box for continuous curing for 3 days and 28 days, and carrying out a uniaxial compressive strength test, wherein the results are shown in Table 6.
TABLE 6 cement filling material formulation and uniaxial compressive strength test results
The above examples are intended to provide exemplary details of a method for preparing a cementitious filler material using a variety of industrial residues in combination with very fine tailings, which are intended to aid in understanding the method and core concepts of the present application.
It is to be understood that the application is not limited to the forms disclosed herein, but is not to be construed as limited to the embodiments set forth herein, but is capable of use in various other combinations, modifications and environments and is capable of changes or modifications within the scope of the inventive concept as expressed herein, e.g., by the foregoing teachings or by the knowledge or technology of the relevant art. Any modification made within the spirit and principles of the present application should be included within the scope of the present application as defined in the appended claims.
Claims (10)
1. A method for preparing a cemented filling material by utilizing multi-source industrial waste residues and superfine tailings is characterized by comprising the following raw materials in parts by weight: the industrial solid waste-based cementing material accounts for 6.5-12.5% of the total mass of the filling material, the water accounts for 37-40% of the total mass of the filling material, and the balance is superfine tailings.
2. The cement filling material of claim 1, comprising the steps of:
s1, taking steel slag, fly ash, carbide slag, desulfurized gypsum and blast furnace slag as raw materials, firstly putting the raw materials into a drying box for drying treatment, then putting the raw materials into a ball mill for grinding to obtain raw material powder, and designing an orthogonal test to prepare an industrial solid waste base cementing material;
s2, respectively weighing superfine tailings, industrial solid waste-based cementing materials and water according to a design proportioning scheme, and then putting the superfine tailings, the industrial solid waste-based cementing materials and the water into a rubber sand mixer for mixing and uniformly stirring to form a cementing filling material;
and S3, curing the prepared filling material for 3 days and 28 days under standard conditions, performing uniaxial compressive strength test, and evaluating the performance of the cemented filling material based on the range and analysis of variance so as to determine the optimal proportioning scheme of the cemented filling material.
3. The very fine tailings of claim 1, classified according to grade of domestic colored and gold tailings, having an average particle size of less than 0.019mm.
4. The industrial solid waste-based cementing material according to claim 1, wherein the adopted orthogonal test proportioning scheme is characterized in that four factors are steel slag A, fly ash B, carbide slag C and desulfurized gypsum D respectively, and four levels (namely, the components account for the weight parts of the industrial solid waste-based cementing material) are A: 5. 10, 15 and 20 parts of B: 5. 10, 15 and 20 parts of C: 16. 18, 20, 22 parts, D: 0. 1, 2 and 3 parts, and the balance is supplemented by blast furnace slag, wherein the weight of the blast furnace slag is 40-74 parts.
5. The industrial solid waste-based cementitious material of claim 2, wherein step S1 comprises the specific preparation steps of:
step S11, placing the steel slag, the fly ash, the carbide slag, the desulfurized gypsum and the blast furnace slag in a drying box to keep the temperature at 50 ℃ for drying treatment, and removing redundant moisture until the quality is stable;
step S12, weighing the raw materials dried in the step S11 according to the design and proportioning scheme, and then placing the raw materials into a ball mill for grinding;
and step S13, respectively weighing the raw materials after grinding in the step S12 according to a four-factor four-level orthogonal test proportioning scheme, and uniformly mixing to obtain the industrial solid waste base cementing material.
6. The industrial solid waste-based cementitious material of claim 2, wherein the main mineral phases of the steel slag are tricalcium silicate, dicalcium silicate, wherein CaO, fe 2 O 3 、SiO 2 The mass fractions of (a) are 40% -45%, 20% -25% and 15% -20% respectively. The main mineral phases of the fly ash are quartz and mullite, wherein SiO 2 And Al 2 O 3 The mass fraction of (2) is 45-50% and 35-40%. The main mineral phases of the carbide slag are calcite and calcite, wherein the mass fraction of CaO is 85-90%. The main mineral phase of the desulfurized gypsum is calcium sulfate dihydrate, wherein SO 3 And CaO 50-55 wt% and 40-45 wt% respectively. The main oxide component of blast furnace slag is CaO and SiO 2 、Al 2 O 3 The mass fraction of (2) is 30-40%, 25-30% and 15-20%.
7. The industrial solid waste-based cementitious material of claim 5, wherein: the specific surface area of the powder of the steel slag in the step S12 is 400m 2 Per kg, the powder specific surface area of the blast furnace slag is 420m 2 Per kg, the specific surface area of the powder of the fly ash is 380m 2 Per kg, the specific surface area of the powder of the carbide slag is 360m 2 Per kg, powder specific surface area of desulfurization gypsum 350m 2 /kg。
8. The industrial solid waste-based cementing material according to claim 5, wherein carbide slag is used as an alkali activator, and desulfurized gypsum is used as a salt activator, and the two are cooperated to form an alkali-salt composite activator for preparing the industrial solid waste-based cementing material.
9. The method for preparing the cemented filling material by the cooperation of the multi-source industrial waste residues and the superfine tailings, which is disclosed in claim 1, is characterized in that the superfine tailings, the industrial solid waste base cementing material and water are uniformly mixed and stirred to obtain filling slurry, and after the standard curing of coagulation, solidification and hardening, the cemented filling material is prepared by the cooperation of the multi-source industrial waste residues and the superfine tailings, wherein the uniaxial compressive strength of 3 days is more than 1MPa, and the uniaxial compressive strength of 28 days is more than 2MPa.
10. The preparation of a cemented filling material by using the multi-source industrial waste residue and superfine tailings according to any one of claims 1-3 is preferably applied to the field of metal mine filling mining.
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