CN113292260A - High-strength mine filling solid-waste synergistic composite gelling agent and preparation method and use method thereof - Google Patents
High-strength mine filling solid-waste synergistic composite gelling agent and preparation method and use method thereof Download PDFInfo
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- CN113292260A CN113292260A CN202110590889.3A CN202110590889A CN113292260A CN 113292260 A CN113292260 A CN 113292260A CN 202110590889 A CN202110590889 A CN 202110590889A CN 113292260 A CN113292260 A CN 113292260A
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- 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
- C04B7/00—Hydraulic cements
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
- C04B7/153—Mixtures thereof with other inorganic cementitious materials or other activators
- C04B7/21—Mixtures thereof with other inorganic cementitious materials or other activators with calcium sulfate containing activators
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- 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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/08—Slag cements
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- 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
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
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Abstract
The invention discloses a high-strength mine filling solid-waste synergistic composite gelling agent, a preparation method and a use method thereof, and relates to the technical field of composite gelling agents, wherein the solid-waste synergistic composite gelling agent comprises the following substances in parts by weight: 61-92 parts of smelting waste residue, 3-29 parts of desulfurized gypsum, 2-21 parts of coagulant, 0.1-4 parts of coagulant regulator and 0.05-0.2 part of stabilizer, and the filling slurry is prepared according to parts by weight and comprises 3-20 parts of solid-waste synergistic composite gelling agent, 45-75 parts of tailings and 22-40 parts of water.
Description
Technical Field
The invention relates to the technical field of composite gelling agents, in particular to a high-strength mine filling solid-waste synergistic composite gelling agent, and a preparation method and a use method thereof.
Background
The comprehensive utilization of solid waste is the basic national policy of implementing resource saving, environment protection and safe production. The comprehensive utilization of industrial solid wastes in China is an important measure for energy conservation, environmental protection and transformation and upgrading of industry, is a permanent strategy for solving the problems of environmental pollution and potential safety hazard of industrial solid wastes and ensuring the sustainable development of the industry in China. In recent years, the annual output of smelting waste slag in China reaches more than 4 hundred million tons, and the comprehensive utilization rate is only about 75%; the annual output of the desulfurized gypsum exceeds 1.2 hundred million tons, and the comprehensive utilization rate is about 70 percent; the regeneration and the utilization of industrial solid wastes are enhanced, the smelting waste residues and the desulfurized gypsum are completely treated, the aim of zero emission is achieved, and the aim of heavy and far-reaching is fulfilled.
Goaf filling mining refers to filling a goaf formed after stoping with filling materials along with the advance of a stope working face in a stope, and the filling mining method is an effective method which can effectively control mining subsidence and improve the recovery rate of resources. For a long time, the mine filling material mainly uses common cement as a cementing agent, and a large amount of cement is consumed by the mine for filling operation, so that not only is the mining cost increased, but also a lot of precious natural resources are consumed.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a high-strength composite gelling agent for mine filling solid waste interaction, which adopts smelting industrial waste residues and desulfurized gypsum generated by flue gas desulfurization of a coal-fired power plant or a metal smelting plant as main raw materials, realizes the synergistic interaction between the physical and chemical properties of solid waste materials through the induced excitation and polymerization of a coagulant, a coagulation regulator and a stabilizer on the main raw materials, and has the advantages of low production and processing cost, high strength and good stability, and filling slurry thereof. The solid-waste synergistic composite gelling agent is used for replacing common cement, is mixed with mine tailings and water to form filling slurry, and is solidified underground, so that not only is the filling mining cost greatly reduced, but also the resource utilization of industrial wastes is realized; the formed high-strength filling body not only improves the safety of underground filling mining operation, but also shortens the cycle of stope circulating operation, and is beneficial to the improvement of the production efficiency of mines.
In order to achieve the purpose, the invention provides the following technical scheme: the high-strength mine filling solid-waste synergistic composite gelling agent comprises the following substances in parts by weight: 61-92 parts of smelting waste residue, 3-29 parts of desulfurized gypsum, 2-21 parts of coagulant, 0.1-4 parts of coagulation regulator and 0.05-0.2 part of stabilizer.
Preferably, the smelting waste slag is one or a combination of more than two of steel slag, blast furnace slag, copper slag, nickel slag and vanadium slag. The steel slag, the blast furnace slag, the copper slag, the nickel slag and the vanadium slag have good latent activity, and can be hydrated to generate a hydraulic gel material with high strength under the excitation action of a coagulation regulator.
Further, preferably, the smelting waste is smelting waste powder with the granularity of 15-70 microns. The activity index of the smelting waste slag is greatly improved under the condition of being ground to be finer.
Further, preferably, the desulfurized gypsum is desulfurized gypsum generated by flue gas desulfurization in a coal-fired power plant or a metal smelting plant, wherein the content of sulfur trioxide is 25-46%. Because the addition of the desulfurized gypsum can enable the chemical compositions of the smelting waste residue and the desulfurized gypsum to be complementary and mutually cooperated, the activity of the smelting waste residue is fully exerted, the strength of the hydration hardening substance is higher, the stability is better, and the carbonization phenomenon of a cementing body is effectively avoided.
Preferably, the coagulant is one or a combination of two of active calcium-containing material, portland cement clinker and sulphoaluminate cement clinker, and the particle size of the coagulant is 20-75 microns. The addition of the coagulant ensures the proper alkalinity in the liquid phase, is beneficial to the early-stage rapid formation of the hydration of the ettringite, and promotes the early-stage hydration reaction process of the smelting waste residue and the desulfurized gypsum.
Preferably, the set control agent is one or a combination of two or more of chloride, sulfate, carbonate and alkali metal silicate. Each component in the composition has complementarity, and the main material is easier to excite to generate a solidification body with high strength and stable performance.
Further, preferably, the stabilizer is methylcellulose. The methyl cellulose aqueous solution is very stable in the range of pH 3-12, has good water retention property, can enhance the homogeneity and the flow stability of slurry, is favorable for long-distance delivery of the slurry, and improves the integrity and the strength of a filling body.
The preparation method of the solid-waste synergistic composite gelling agent comprises the following steps:
s1, after the smelting waste residue and the desulfurized gypsum are dried, respectively measuring the smelting waste residue, the desulfurized gypsum, a coagulant, a coagulation regulator and a stabilizer in parts by weight;
s2, respectively grinding or jointly grinding the smelting waste residue, the desulfurized gypsum, the coagulant, the coagulation regulator and the stabilizer by using a grinding machine;
and S3, uniformly mixing the materials by a material mixing and homogenizing process to form the solid-waste synergistic composite gelling agent.
The use method of the solid-waste synergistic composite gelling agent comprises the following steps:
s1, preparing filling slurry, which comprises the following components in parts by weight: 3-20 parts of a solid-waste synergistic composite gelling agent, 45-75 parts of tailings and 22-40 parts of water;
s2, conveying the filling slurry to an underground goaf through a drilling hole and an underground filling pipe;
and S3, after the mixed slurry is condensed and maintained in the underground goaf for 7-28 days, forming a high-strength filling body and then carrying out underground filling mining operation.
Further, preferably, when the filling slurry is prepared, water is added into a mixing drum according to the weight part, and then the solid-waste synergistic composite gelling agent is placed into the mixing drum through a feeder according to the weight part for mixing;
and then putting the mine full tailings or the deslimed graded tailings into a tailings bin for storage, conveying the tailings to a stirring cylinder through a pipeline or a belt conveyor according to parts by weight, stirring and mixing for 2-5 minutes, and forming filling slurry.
The advantages are that: (1) in mine goaf filling, under-building filling mining, under-road filling mining and under-water body filling mining, the solid-waste synergistic composite gelling agent is used for replacing common cement, and is mixed with mine tailings and water to form filling slurry, and the filling slurry is cured underground to form a high-strength filling body, so that the filling mining cost is greatly reduced, and the resource utilization of industrial wastes is realized; (2) and after the slurry after stirring and mixing is solidified and maintained in the goaf for 7-28 days, a high-strength filling body with better cement effect is formed.
Compared with the prior art, the invention provides a high-strength mine filling solid-waste synergistic composite gelling agent, a preparation method and a use method thereof, and the high-strength mine filling solid-waste synergistic composite gelling agent has the following beneficial effects:
the composite gelling agent and the filling slurry thereof have the advantages of low production and processing cost, high strength and good stability. The solid-waste synergistic composite gelling agent is used for replacing common cement, is mixed with mine tailings and water to form filling slurry, and is solidified underground, so that not only is the filling mining cost greatly reduced, but also the resource utilization of industrial wastes is realized; the formed high-strength filling body not only improves the safety of underground filling mining operation, but also shortens the cycle of stope circulating operation, and is beneficial to the improvement of the production efficiency of mines.
Drawings
FIG. 1 is a schematic diagram of the method of using the solid-waste synergistic composite gelling agent of the present invention;
1. the device comprises a tailing sand bin, 2, a flowmeter, 3, a gelatinizing agent bin, 4, a feeder, 5, a water pool, 6, a mixing drum, 7, a concentration meter, 8, a drill hole, 9, an underground filling pipe and 10, and an underground goaf.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a technical scheme that: the high-strength mine filling solid-waste synergistic composite gelling agent comprises the following substances in parts by weight: 61-92 parts of smelting waste residue, 3-29 parts of desulfurized gypsum, 2-21 parts of coagulant, 0.1-4 parts of coagulation regulator and 0.05-0.2 part of stabilizer.
In addition, the smelting waste slag is one or a composition of more than two of steel slag, blast furnace slag, copper slag, nickel slag and vanadium slag. The smelting waste slag is smelting waste slag powder with the granularity of 15-70 microns. The content of sulfur trioxide in the desulfurized gypsum is 25-46%. The coagulant is one or a composition of two of active calcium-containing materials, portland cement clinker and sulphoaluminate cement clinker, and the particle size of the coagulant is 20-75 microns. The coagulation regulator is one or a composition of more than two of chloride, sulfate, carbonate and alkali metal silicate. The stabilizer is methyl cellulose.
In addition, the invention also provides a preparation method of the solid-waste synergistic composite gelling agent, which comprises the following steps:
s1, after the smelting waste residue and the desulfurized gypsum are dried, respectively measuring the smelting waste residue, the desulfurized gypsum, a coagulant, a coagulation regulator and a stabilizer in parts by weight;
s2, respectively grinding or jointly grinding the smelting waste residue, the desulfurized gypsum, the coagulant, the coagulation regulator and the stabilizer by using a grinding machine;
and S3, uniformly mixing the materials by a material mixing and homogenizing process to form the solid-waste synergistic composite gelling agent.
In addition, the invention also provides a use method of the solid-waste synergistic composite gelling agent, which comprises the following steps:
s1, preparing filling slurry, which comprises the following components in parts by weight: 3-20 parts of a solid-waste synergistic composite gelling agent, 45-75 parts of tailings and 22-40 parts of water;
s2, conveying the filling slurry to an underground goaf 10 through a drilling hole 8 and an underground filling pipe 9;
and S3, after the mixed slurry is condensed and maintained in the underground goaf for 7-28 days, forming a high-strength filling body and then carrying out underground filling mining operation.
As shown in fig. 1, a tailing sand bin 1, a gelatinizing agent bin 3 and a water tank 5 are respectively connected with a feeding port of a mixing drum 6 through pipelines, a discharging port of the mixing drum 6 is connected with a downhole filling pipe 9 by penetrating a pipeline through a drill hole 8, each pipeline is provided with a flowmeter 2, a discharging end of the gelatinizing agent bin 3 is also provided with a feeder 4, a concentration meter 7 is arranged at a discharging end of the mixing drum 6, when filling slurry is prepared, metered water is added into the mixing drum 6 according to parts by weight, and then the metered solid-waste synergistic composite gelatinizing agent is placed into the mixing drum 6 through the feeder 4 to be stirred and mixed;
and then putting the mine full tailings or the deslimed graded tailings into a tailings bin 1 for storage, conveying the tailings to a stirring cylinder through a pipeline or a belt conveyor according to parts by weight, stirring and mixing for 2-5 minutes, and forming filling slurry.
Example one
The high-strength mine filling solid-waste synergistic composite gelling agent comprises the following substances in parts by weight: 90 parts of smelting waste slag (25 parts of steel slag and 65 parts of blast furnace slag), 4 parts of desulfurized gypsum, 5.6 parts of quicklime, 0.25 part of sodium sulfate and 0.15 part of stabilizer.
The high-strength mine filling solid-waste synergistic composite gelling agent in the first embodiment is tested, by using the filling method of the invention, 8 parts of composite gelling agent, 64 parts of tailings and 28 parts of water are mixed to form filling slurry, a region to be filled is set as a mold, the filling slurry is filled in the mold with the thickness of 70.7mm × 70.7mm × 70.7mm, the mold is removed and maintenance is carried out after the filling slurry is solidified to reach a certain strength, and each test block is maintained to the test age, and the strength performance of each test block is tested.
And (3) testing the compressive strength: the test piece size is 70.7mm multiplied by 70.7mm, the curing environment humidity is 92%, the temperature is 20 +/-1 ℃, the molded test piece is cured for 24 hours with a mold, the compression strength is measured after the predetermined curing period of 3d, 7d and 28d is reached, 3 times of parallel tests are carried out, and the average value is taken.
As a result of the test, the samples of the present example had average compressive strengths of 1.1MPa, 2.3MPa and 4.9MPa at the curing ages of 3d, 7d and 28 d.
Example two
The high-strength mine filling solid-waste synergistic composite gelling agent comprises the following substances in parts by weight: 75 parts of smelting waste residues (15 parts of nickel residues and 60 parts of blast furnace slag), 17 parts of desulfurized gypsum, 2 parts of quicklime, 4 parts of portland cement clinker, 0.5 part of sodium carbonate, 1.4 parts of calcium chloride and 0.1 part of stabilizer.
The high-strength mine filling solid-waste synergistic composite gelling agent in the second embodiment is tested, by using the filling method, 11 parts of the composite gelling agent, 64 parts of tailings and 25 parts of water are mixed to form filling slurry, an area to be filled is set as a mold, the filling slurry is filled in the mold with the thickness of 70.7mm × 70.7mm × 70.7mm, the mold is removed and maintenance is carried out after the filling slurry is solidified to reach a certain strength, and each test block is maintained to the test age, and the strength performance of each test block is tested.
And (3) testing the compressive strength: the test piece size is 70.7mm multiplied by 70.7mm, the curing environment humidity is 92%, the temperature is 20 +/-1 ℃, the molded test piece is cured for 24 hours with a mold, the compression strength is measured after the predetermined curing period of 3d, 7d and 28d is reached, 3 times of parallel tests are carried out, and the average value is taken.
As a result of the test, the samples of the present example had average compressive strengths of 1.0MPa, 2.4MPa and 5.8MPa at the curing ages of 3d, 7d and 28 d.
EXAMPLE III
The high-strength mine filling solid-waste synergistic composite gelling agent comprises the following substances in parts by weight: 63 parts of blast furnace slag, 17 parts of desulfurized gypsum, 15 parts of portland cement clinker, 4 parts of quick lime, 0.45 part of sodium silicate, 0.5 part of calcium chloride and 0.05 part of stabilizer.
The high-strength mine filling solid-waste synergistic composite gelling agent in the third embodiment is tested, by using the filling method, 12 parts of composite gelling agent, 49 parts of tailings and 39 parts of water are mixed to form filling slurry, a region to be filled is set as a mold, the filling slurry is filled in the mold with the thickness of 70.7mm × 70.7mm × 70.7mm, the mold is removed and maintenance is carried out after the filling slurry is solidified to reach a certain strength, and each test block is maintained to the test age, and the strength performance of each test block is tested.
And (3) testing the compressive strength: the test piece size is 70.7mm multiplied by 70.7mm, the curing environment humidity is 92%, the temperature is 20 +/-1 ℃, the molded test piece is cured for 24 hours with a mold, the compression strength is measured after the predetermined curing period of 3d, 7d and 28d is reached, 3 times of parallel tests are carried out, and the average value is taken.
As a result of the test, the samples of the present example had average compressive strengths of 1.2MPa, 2.6MPa and 5.5MPa at the curing ages of 3d, 7d and 28 d.
Example four
The high-strength mine filling solid-waste synergistic composite gelling agent comprises the following substances in parts by weight: 82 parts of smelting waste residues (70 parts of blast furnace slag and 12 parts of copper slag), 4 parts of desulfurized gypsum, 6 parts of sulphoaluminate cement clinker, 5 parts of quicklime, 1.2 parts of calcium chloride, 1.7 parts of potassium silicate and 0.1 part of stabilizer.
The high-strength mine filling solid-waste synergistic composite gelling agent in the fourth embodiment is tested, by using the filling method of the invention, 7 parts of composite gelling agent, 69 parts of tailings and 24 parts of water are mixed to form filling slurry, a region to be filled is set as a mold, the filling slurry is filled in the mold with the thickness of 70.7mm × 70.7mm × 70.7mm, the mold is removed and maintenance is carried out after the filling slurry is solidified to reach a certain strength, and each test block is maintained to the test age, and the strength performance of each test block is tested.
And (3) testing the compressive strength: the test piece size is 70.7mm multiplied by 70.7mm, the curing environment humidity is 92%, the temperature is 20 +/-1 ℃, the molded test piece is cured for 24 hours with a mold, the compression strength is measured after the predetermined curing period of 3d, 7d and 28d is reached, 3 times of parallel tests are carried out, and the average value is taken.
As a result of the test, the samples of the present example had average compressive strengths of 0.8MPa, 1.7MPa and 3.2MPa at the curing ages of 3d, 7d and 28 d.
EXAMPLE five
The high-strength mine filling solid-waste synergistic composite gelling agent comprises the following substances in parts by weight: 79 parts of smelting waste residues (15 parts of copper residues and 64 parts of blast furnace slag), 9 parts of desulfurized gypsum, 5 parts of portland cement clinker, 5 parts of sulphoaluminate cement clinker, 1.45 parts of sodium silicate, 0.5 part of sodium sulfate and 0.05 part of stabilizer.
The high-strength mine filling solid-waste synergistic composite gelling agent in the fifth embodiment is tested, by utilizing the filling method, 8 parts of composite gelling agent, 67 parts of tailings and 25 parts of water are mixed to form filling slurry, a region to be filled is set as a mold, the filling slurry is filled in the mold with the thickness of 70.7mm multiplied by 70.7mm, the mold is removed and maintenance is carried out after the filling slurry is solidified to reach a certain strength, and each test block is maintained to the test age, and the strength performance of each test block is tested.
And (3) testing the compressive strength: the test piece size is 70.7mm multiplied by 70.7mm, the curing environment humidity is 92%, the temperature is 20 +/-1 ℃, the molded test piece is cured for 24 hours with a mold, the compression strength is measured after the predetermined curing period of 3d, 7d and 28d is reached, 3 times of parallel tests are carried out, and the average value is taken.
As a result of the test, the samples of the present example had average compressive strengths of 1.2MPa, 2.5MPa and 4.4MPa at the curing ages of 3d, 7d and 28 d.
Therefore, the composite gelling agent and the filling slurry thereof have the advantages that the desulfurized gypsum generated by flue gas desulfurization of smelting industrial waste residues and coal-fired power plants or metal smelting plants is used as the main raw material, the synergistic interaction between the physical and chemical properties of solid waste materials is realized through the induced excitation and polymerization of the coagulant, the coagulation regulator and the stabilizer on the main raw material, and the composite gelling agent and the filling slurry thereof have low production and processing cost, high strength and good stability. The solid-waste synergistic composite gelling agent is used for replacing common cement, is mixed with mine tailings and water to form filling slurry, and is solidified underground, so that not only is the filling mining cost greatly reduced, but also the resource utilization of industrial wastes is realized; the formed high-strength filling body not only improves the safety of underground filling mining operation, but also shortens the cycle of stope circulating operation, and is beneficial to the improvement of the production efficiency of mines.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.
Claims (10)
1. The high-strength mine filling solid-waste interaction composite gelling agent is characterized in that: the feed additive comprises the following substances in parts by weight: 61-92 parts of smelting waste residue, 3-29 parts of desulfurized gypsum, 2-21 parts of coagulant, 0.1-4 parts of coagulation regulator and 0.05-0.2 part of stabilizer.
2. The high-strength mine filling solid-waste synergistic composite gelling agent as claimed in claim 1, wherein: the smelting waste slag is one or a composition of more than two of steel slag, blast furnace slag, copper slag, nickel slag and vanadium slag.
3. The high-strength mine filling solid-waste synergistic composite gelling agent as claimed in claim 1, wherein: the smelting waste slag is smelting waste slag powder with the granularity of 15-70 microns.
4. The high-strength mine filling solid-waste synergistic composite gelling agent as claimed in claim 1, wherein: the content of sulfur trioxide in the desulfurized gypsum is 25-46%.
5. The high-strength mine filling solid-waste synergistic composite gelling agent as claimed in claim 1, wherein: the coagulant is one or a composition of two of active calcium-containing materials, portland cement clinker and sulphoaluminate cement clinker, and the particle size of the coagulant is 20-75 microns.
6. The high-strength mine filling solid-waste synergistic composite gelling agent as claimed in claim 1, wherein: the coagulation regulator is one or a composition of more than two of chloride, sulfate, carbonate and alkali metal silicate.
7. The high-strength mine filling solid-waste synergistic composite gelling agent as claimed in claim 1, wherein: the stabilizer is methyl cellulose.
8. A preparation method of the solid-waste synergistic composite gelling agent as claimed in any one of claims 1 to 7, characterized by comprising the following steps: the method comprises the following steps:
s1, after the smelting waste residue and the desulfurized gypsum are dried, respectively measuring the smelting waste residue, the desulfurized gypsum, a coagulant, a coagulation regulator and a stabilizer in parts by weight;
s2, respectively grinding or jointly grinding the smelting waste residue, the desulfurized gypsum, the coagulant, the coagulation regulator and the stabilizer by using a grinding machine;
and S3, uniformly mixing the materials by a material mixing and homogenizing process to form the solid-waste synergistic composite gelling agent.
9. The use method of the solid-waste synergistic composite gelling agent as claimed in any one of claims 1 to 7, is characterized in that: the method comprises the following steps:
s1, preparing filling slurry, which comprises the following components in parts by weight: 3-20 parts of a solid-waste synergistic composite gelling agent, 45-75 parts of tailings and 22-40 parts of water;
s2, conveying the filling slurry to an underground goaf through a drilling hole and an underground filling pipe;
and S3, after the mixed slurry is condensed and maintained in the underground goaf for 7-28 days, forming a high-strength filling body and then carrying out underground filling mining operation.
10. The use method of the solid-waste synergistic composite gelling agent as claimed in claim 9, wherein: when filling slurry is prepared, adding water into a mixing drum according to the weight part, and then putting the solid-waste synergistic composite gelling agent into the mixing drum through a feeder according to the weight part for mixing;
and then putting the mine full tailings or the deslimed graded tailings into a tailings bin for storage, conveying the tailings to a stirring cylinder through a pipeline or a belt conveyor according to parts by weight, stirring and mixing for 2-5 minutes, and forming filling slurry.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115557727A (en) * | 2022-12-06 | 2023-01-03 | 湖南大学 | Ore tailing derived self-forming material and application thereof |
| WO2024109463A1 (en) * | 2022-11-21 | 2024-05-30 | 湖南大学 | Low-carbon underground filling material and preparation method therefor |
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| CN110054423A (en) * | 2019-03-13 | 2019-07-26 | 金泰成环境资源股份有限公司 | A kind of lower shrinkage early-strength filling in mine cementitious material for ultra-fine iron tailings sand |
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| WO2024109463A1 (en) * | 2022-11-21 | 2024-05-30 | 湖南大学 | Low-carbon underground filling material and preparation method therefor |
| WO2024113877A1 (en) * | 2022-11-28 | 2024-06-06 | 天地(榆林)开采工程技术有限公司 | Quick-setting filling process and system for paste |
| CN115557727A (en) * | 2022-12-06 | 2023-01-03 | 湖南大学 | Ore tailing derived self-forming material and application thereof |
| CN115557727B (en) * | 2022-12-06 | 2023-03-14 | 湖南大学 | Ore tailing derived self-forming material and application thereof |
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