CN112374849A - Filling material suitable for metal underground mine and use method thereof - Google Patents
Filling material suitable for metal underground mine and use method thereof Download PDFInfo
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- CN112374849A CN112374849A CN202011163748.5A CN202011163748A CN112374849A CN 112374849 A CN112374849 A CN 112374849A CN 202011163748 A CN202011163748 A CN 202011163748A CN 112374849 A CN112374849 A CN 112374849A
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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
- C04B28/14—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
- C04B18/06—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
- 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
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Civil Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a filling material suitable for metal underground mines, which is prepared from a curing agent and tailings by the following weight percentage of 10: 90 weight percent; the curing agent is prepared by mechanically stirring and mixing the following raw materials in percentage by weight for 20 minutes, and then drying and grinding the raw materials until the comprehensive specific surface area is more than 500 m2After kg, the following are obtained: 50-75% of S95 mineral powder, 5-20% of steel slag powder, 5-25% of desulfurized gypsum, 1-5% of anhydrous sodium sulphate and 3-10% of fly ash. Meanwhile, the invention also discloses a using method of the filling material. After the filling material is filled in an underground metal mine dead zone, a formed filling body is high in early strength and good in stability, no volume shrinkage is caused after solidification, filling slurry is good in mobility, and risks such as pipe blockage are not easy to occur.
Description
Technical Field
The invention relates to a filling material, in particular to a filling material suitable for metal underground mines and a using method thereof.
Background
In underground mining of metal ores, the mining method generally adopted at present is an open stope subsequent filling mining method, firstly, ores are mined out by adopting the process of the open stope method to form a goaf, then the goaf is filled, and filling materials are very critical. Because ores extracted from metal mines can form a large amount of tailings in the ore dressing process, the tailings are stored in a ground tailing pond, land surface resources are occupied, and the tailings are extremely dangerous. Therefore, how to fill the tailings into the stope not only solves the problem of surface stockpiling of the tailings, but also solves the situation that the stope cannot control the ground pressure by an empty stope method.
The currently widely used technology is as follows: the tailing and the cement are used as filling materials, and the cement is used as a conventional cementing material and is widely applied to industrial and civil buildings. Practice proves that the cement and tailing cemented filling body has extremely low strength and poor slurry fluidity. In order to meet the requirement of the strength of the cemented filling body mined by a filling method, the cement mixing amount has to be increased, so that the filling mining cost is improved, and the economic benefit of filling mining is obviously reduced. This is because the particles of the metal mine beneficiation tailings are extremely fine, and the cement particles cannot completely wrap the tailings particles, resulting in low strength after curing.
Disclosure of Invention
The invention aims to solve the technical problem of providing a filling material which has high strength and good stability and is suitable for metal underground mines.
The invention also provides a using method of the filling material.
In order to solve the problems, the filling material suitable for the metal underground mine is characterized in that: the filling material is prepared from a curing agent and tailings according to the weight ratio of 10: 90 weight percent; the curing agent is prepared by mechanically stirring and mixing the following raw materials in percentage by weight for 20 minutes, and then drying and grinding the raw materials until the comprehensive specific surface area is more than 500 m2After kg, the following are obtained: 50-75% of S95 mineral powder, 5-20% of steel slag powder, 5-25% of desulfurized gypsum, 1-5% of anhydrous sodium sulphate and 3-10% of fly ash.
The tailings are solid mineral waste materials which are stored in a tailing pond after tailing pulp discharged by a dressing plant is pumped, and the water content of the tailings is 30% -60%.
The specific surface area of the steel slag powder is 450-550 m2/kg。
The water content of the desulfurized gypsum is lower than 2%, and the specific surface area is 300-350 m2/kg。
The residual amount of the fly ash passing through a square-hole sieve with the diameter of 45 mu m is less than or equal to 20 percent, the ignition loss is less than or equal to 8 percent, the water demand ratio is less than or equal to 105 percent, and SO3The mass content is less than or equal to 3 percent; the fly ash comprises the following components in percentage by mass: 45-56% of SiO220 to 30% of Al2O36-10% of FeO and 5-8% of Fe2O32-5% of CaO and 1-3% of TiO2Excess ofThe amount is impurities.
The use method of the filling material suitable for the metal underground mine is characterized by comprising the following steps: and adding water with the mass of 20-28% into the filling material, stirring for 5-10 minutes, and conveying the mixture into the metal underground mine empty area through a filling pump and a filling pipeline for filling.
Compared with the prior art, the invention has the following advantages:
1. the invention has wide source of raw materials and lower price, and utilizes the industrial solid wastes such as the fly ash, the desulfurized gypsum and the like, thereby not only solving the problem of stockpiling of the industrial solid wastes and changing waste into valuable, but also having lower cost relative to cement and having obvious economic benefit and environmental protection benefit.
2. After the filling material is filled in an underground metal mine dead zone, a formed filling body is high in early strength and good in stability, no volume shrinkage is caused after solidification, filling slurry is good in mobility, and risks such as pipe blockage are not easy to occur.
Detailed Description
Example 1 a fill material suitable for metal underground mines was prepared by mixing 10kg of a setting agent and 90kg of tailings. The moisture content of the tailings was 55%.
Wherein: the curing agent is prepared by mechanically stirring and mixing the following raw materials in percentage by weight for 20 minutes, drying and grinding the raw materials until the comprehensive specific surface area is more than 500 m2After kg, the following are obtained: 65% of S95 mineral powder, 11% of steel slag powder, 15% of desulfurized gypsum, 3% of anhydrous sodium sulphate and 6% of fly ash.
The specific surface area of the steel slag powder is 480 m2/kg。
The water content of the desulfurized gypsum is 1.2 percent, and the specific surface area is 360m2/kg。
20 percent of the fly ash which passes through a 45 mu m square hole sieve, 6 percent of ignition loss, 97 percent of water demand and SO3The mass content is 2%; the fly ash comprises the following components in percentage by mass: 44% SiO230% of Al2O38% FeO, 8% Fe2O34% of CaO and 2% of TiO2And the balance being impurities.
The filling material is applied to a metal ore in Longnan, Gansu province.
The specific use method comprises the following steps: adding 25% of water by mass into the filling material, stirring for 5-10 minutes, testing the fluidity and the strength of the stirred filling material, and comparing the results with the cement tailing filling material with the same mass concentration and sand-lime ratio, wherein the results are shown in the following table 1:
TABLE 1
Higher values of fluidity indicate better slurry fluidity and are more beneficial for the fill material, and higher values of strength are more beneficial for maintaining pack stability.
And then, conveying the stirred filling slurry into the metal underground mine empty area through a filling pump and a filling pipeline for filling.
The goaf filled by the filling material is monitored, the drill hole and the rock core are sampled, the filling body is stable and has no damage after 3 months, the drill hole and the rock core are sampled to show that the curing effect of the filling body is better, and the strength of the drill hole and the rock core meets the expected strength requirement.
Compared with the cement tailing filling material, the filling material saves 22% of the filling material cost in the same ratio under the condition of the same water-cement ratio and mass concentration, and simultaneously utilizes and consumes the peripheral solid wastes such as desulfurized gypsum, fly ash and the like, thereby obtaining good economic and environmental benefits.
Example 2 a fill material suitable for metal underground mines was prepared by mixing 10kg of a setting agent and 90kg of tailings. The water content of the tailings was 45%.
Wherein: the curing agent is prepared by mechanically stirring and mixing the following raw materials in percentage by weight for 20 minutes, drying and grinding the raw materials until the comprehensive specific surface area is more than 500 m2After kg, the following are obtained: 55% of S95 mineral powder, 10% of steel slag powder, 20% of desulfurized gypsum, 5% of anhydrous sodium sulphate and 10% of fly ash.
The specific surface area of the steel slag powder is 475 m2/kg。
The desulfurized gypsum has a water content of 1.5% and a specific surface area of 370m2/kg。
The residual amount of fly ash passing through a 45-micron square-hole sieve is 18 percent, the loss on ignition is 7 percent, the water demand ratio is 98 percent, and SO3The mass content is 1.5%; the fly ash comprises the following components in percentage by mass: 45% SiO228% of Al2O310% FeO, 8% Fe2O35 percent of CaO, 2 percent of TiO2And the balance being impurities.
The filling material is applied to a metal ore in Shandong.
The specific use method comprises the following steps: adding 25% of water by mass into the filling material, stirring for 5-10 minutes, testing the fluidity and the strength of the stirred filling material, and comparing the results with the cement tailing filling material with the same mass concentration and sand-lime ratio, wherein the results are shown in a table 2:
TABLE 2
Higher values of fluidity indicate better slurry fluidity and are more beneficial for the fill material, and higher values of strength are more beneficial for maintaining pack stability.
And then, conveying the stirred filling slurry into the metal underground mine empty area through a filling pump and a filling pipeline for filling.
The goaf filled by the filling material is monitored, the drill hole and the rock core are sampled, the filling body is stable and has no damage after 3 months, the drill hole and the rock core are sampled to show that the curing effect of the filling body is better, and the strength of the drill hole and the rock core meets the expected strength requirement.
Compared with the cement tailing filling material, the filling material saves 28% of the filling material cost in the same ratio under the condition of the same water-cement ratio and mass concentration, and simultaneously utilizes and consumes the peripheral solid wastes such as desulfurized gypsum, fly ash and the like, thereby obtaining good economic and environmental benefits.
Example 3 a fill material suitable for metal underground mines, the fill material being formed by mixing 10kg of a setting agent and 90kg of tailings. The water content of the tailings was 30%.
Wherein: the curing agent is prepared by mechanically stirring and mixing the following raw materials in percentage by weight for 20 minutes, drying and grinding the raw materials until the comprehensive specific surface area is more than 500 m2After kg, the following are obtained: 55% of S95 mineral powder, 20% of steel slag powder, 15% of desulfurized gypsum, 5% of anhydrous sodium sulphate and 5% of fly ash.
The residual amount of fly ash passing through a 45-micron square-hole sieve is 18 percent, the loss on ignition is 8 percent, the water demand ratio is 105 percent, and SO3The mass content is 3 percent; the fly ash comprises the following components in percentage by mass: 56% SiO225% of Al2O36% FeO, 5% Fe2O32 percent of CaO, 1 percent of TiO2And the balance being impurities.
Example 4 a fill material suitable for metal underground mines was prepared by mixing 10kg of a setting agent and 90kg of tailings. The water content of the tailings is 60%.
Wherein: the curing agent is prepared by mechanically stirring and mixing the following raw materials in percentage by weight for 20 minutes, drying and grinding the raw materials until the comprehensive specific surface area is more than 500 m2After kg, the following are obtained: 75% of S95 mineral powder, 16% of steel slag powder, 5% of desulfurized gypsum, 1% of anhydrous sodium sulphate and 3% of fly ash.
The residual amount of fly ash passing through a 45-micron square-hole sieve is 18 percent, the loss on ignition is 7 percent, the water demand ratio is 98 percent, and SO3The mass content is 1.5%; the fly ash comprises the following components in percentage by mass: 56% SiO220% of Al2O37% FeO, 6% Fe2O33 percent of CaO, 3 percent of TiO2And the balance being impurities.
Example 5A filling material suitable for metal underground mines, which was prepared by mixing 10kg of a curing agent and 90kg of tailings. The water content of the tailings was 35%.
Wherein: the curing agent is prepared by mechanically stirring and mixing the following raw materials in percentage by weight for 20 minutes, drying and grinding the raw materials until the comprehensive specific surface area is more than 500 m2After kg, the following are obtained: 50% of S95 mineral powder, 10% of steel slag powder, 25% of desulfurized gypsum, 5% of anhydrous sodium sulphate and 10% of fly ash.
The fly ash was the same as in example 1.
Example 6A filling material suitable for metal underground mines, which was prepared by mixing 10kg of a solidifying agent and 90kg of tailings. The water content of the tailings is 40%.
Wherein: the curing agent is prepared by mechanically stirring and mixing the following raw materials in percentage by weight for 20 minutes, drying and grinding the raw materials until the comprehensive specific surface area is more than 500 m2After kg, the following are obtained: 70% of S95 mineral powder, 5% of steel slag powder, 12% of desulfurized gypsum, 4% of anhydrous sodium sulphate and 9% of fly ash.
The fly ash was the same as in example 1.
In the above embodiments 3 to 6, the tailings are solid mineral waste materials stored in a tailing pond by pumping tailing pulp discharged from a concentrating mill.
The specific surface area of the steel slag powder is 450-550 m2/kg。
The water content of the desulfurized gypsum is lower than 2%, and the specific surface area is 300-350 m2/kg。
The use of the filling materials obtained in examples 3 to 6 above: and adding water with the mass of 20-28% into the filling material, stirring for 5-10 minutes, and conveying the mixture into the metal underground mine empty area through a filling pump and a filling pipeline for filling.
Claims (6)
1. A filling material suitable for metal underground mines is characterized in that: the filling material is prepared from a curing agent and tailings according to the weight ratio of 10: 90 weight percent; the curing agent is prepared by mechanically stirring and mixing the following raw materials in percentage by weight for 20 minutes, and then drying and grinding the raw materials until the comprehensive specific surface area is more than 500 m2After kg, the following are obtained: 50-75% of S95 mineral powder, 5-20% of steel slag powder, 5-25% of desulfurized gypsum, 1-5% of anhydrous sodium sulphate and 3-10% of fly ash.
2. A filling material suitable for a metal underground mine according to claim 1, wherein: the tailings are solid mineral waste materials which are stored in a tailing pond after tailing pulp discharged by a dressing plant is pumped, and the water content of the tailings is 30% -60%.
3. A filling material suitable for a metal underground mine according to claim 1, wherein: the specific surface area of the steel slag powder is 450-550 m2/kg。
4. A filling material suitable for a metal underground mine according to claim 1, wherein: the water content of the desulfurized gypsum is lower than 2%, and the specific surface area is 300-350 m2/kg。
5. A filling material suitable for a metal underground mine according to claim 1, wherein: the residual amount of the fly ash passing through a square-hole sieve with the diameter of 45 mu m is less than or equal to 20 percent, the ignition loss is less than or equal to 8 percent, the water demand ratio is less than or equal to 105 percent, and SO3The mass content is less than or equal to 3 percent; the fly ash comprises the following components in percentage by mass: 45-56% of SiO220 to 30% of Al2O36-10% of FeO and 5-8% of Fe2O32-5% of CaO and 1-3% of TiO2And the balance being impurities.
6. The use of a filling material suitable for a metal underground mine according to claim 1, wherein: and adding water with the mass of 20-28% into the filling material, stirring for 5-10 minutes, and conveying the mixture into the metal underground mine empty area through a filling pump and a filling pipeline for filling.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011163748.5A CN112374849A (en) | 2020-10-27 | 2020-10-27 | Filling material suitable for metal underground mine and use method thereof |
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| CN202011163748.5A CN112374849A (en) | 2020-10-27 | 2020-10-27 | Filling material suitable for metal underground mine and use method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113185151A (en) * | 2021-05-13 | 2021-07-30 | 广东韶钢松山股份有限公司 | Quicklime slaking device and use method thereof |
| CN113213844A (en) * | 2021-05-13 | 2021-08-06 | 西北矿冶研究院 | Filling tailing curing agent of copper-containing smelting slag |
| CN113526923A (en) * | 2021-05-13 | 2021-10-22 | 西北矿冶研究院 | High-sulfur iron tailing filling curing agent and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113185151A (en) * | 2021-05-13 | 2021-07-30 | 广东韶钢松山股份有限公司 | Quicklime slaking device and use method thereof |
| CN113213844A (en) * | 2021-05-13 | 2021-08-06 | 西北矿冶研究院 | Filling tailing curing agent of copper-containing smelting slag |
| CN113526923A (en) * | 2021-05-13 | 2021-10-22 | 西北矿冶研究院 | High-sulfur iron tailing filling curing agent and preparation method thereof |
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Application publication date: 20210219 |