CN114538876B - Mineralization of CO by solid waste of mining industry 2 Method for preparing mine cemented filling material - Google Patents
Mineralization of CO by solid waste of mining industry 2 Method for preparing mine cemented filling material Download PDFInfo
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- CN114538876B CN114538876B CN202210280209.2A CN202210280209A CN114538876B CN 114538876 B CN114538876 B CN 114538876B CN 202210280209 A CN202210280209 A CN 202210280209A CN 114538876 B CN114538876 B CN 114538876B
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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
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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
- 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
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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
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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
- C04B7/24—Cements from oil shales, residues or waste other than slag
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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
- C04B2111/00017—Aspects relating to the protection of the environment
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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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- 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
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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
- 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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Abstract
The invention provides a method for mineralizing CO by using/mining solid waste 2 The method for preparing the mine cemented filling material comprises the following steps: grinding industrial/mining solid wastes and then uniformly mixing the ground industrial/mining solid wastes with ammonium nitrate; placing the mixed raw materials in a reactor for molten salt activation, collecting ammonia gas generated in the activation process, and converting Ca, mg and Al in the activated raw materials into corresponding metal nitrates; soaking the metal nitrate activation mixture in water, and filtering to obtain the active component SiO 2 The water-soaked slag and Ca are rich 2+ 、Mg 2+ 、Al 3+ The water extract of (2); collecting ammonia gas, the obtained water extract, and prepared CO 2 Introducing into a reaction vessel to perform carbonation reaction, and filtering to obtain filtrate containing ammonium nitrate and main phase of CaCO 3 、MgCO 3 、Al 2 (CO 3 ) 3 The mineralized slag; mixing the mineralized slag with cement and gypsum to prepare a cementing material; and mixing and stirring the cementing material, water and the full tailings to prepare the cemented filling material. This application refers to CO 2 The mineralization sealing technology and the geological sealing technology are organically combined, and the upgrading transformation of metal mine exploitation under the double-carbon strategy is realized.
Description
Technical Field
The invention relates to the technical field of mine filling materials and environmental protection, in particular to a method for mineralizing CO by using solid wastes in mining industry 2 A method for preparing a mine cemented filling material.
Background
The traditional extensive mining mode provides strong assistance for the rapid increase of the economy of China, but also brings the problems of collapse of underground goafs, stockpiling of ground tailings and the like, and if the underground goafs are not disposed in time, large-area environmental pollution and geological disasters can be caused, so that the life and property safety of people is threatened. The filling mining method becomes a main technical means for realizing green, safe and efficient mining of metal mines in China at present, is rapidly developed in recent years, and is developed in the situation of coexistence of multiple forms. However, with the implementation of the national "double carbon" strategy, how to realize the upgrading and transformation of mining becomes an urgent need for the development of the mining industry in China.
At present, the primary energy of China is fossil energy mainly, and CO is 2 Emissions will continue to increase in the next decade. Except for taking active measures to reduce emission (such as improving energy efficiency, developing clean energy and the like) and improving the CO of the terrestrial land system 2 In addition to the absorption capacity (carbon sink) of (2), on CO already produced 2 Performing human treatment has become a focus of attention in recent years. Currently, china's CO 2 The sealing mode mainly comprises ocean sealing, geological sealing and mineralization sealing, but secondary disasters such as leakage, geological disasters, underground water pollution, ecological system damage and the like exist in the ocean sealing and the geological sealing, and the mineralization sealing can be used for sealing CO compared with the former two modes 2 The carbonate which is converted into stable carbonate is fixed for a long time, and the method is a means for realizing the strategy goal of 'double carbon' and is safer and more stable.
Therefore, how to innovatively research the mineralization of CO by industrial/mining solid wastes 2 The obtained mine cemented filling material can meet the filling requirement of the mine goaf and can realize CO 2 The integration of mineralization sealing and geological sealing can improve the safety of mine production, and has the characteristics of environmental protection and resource utilization rate improvement, thereby having important research and development significance and value.
Disclosure of Invention
The conventional deep resource filling mining mainly adopts conventional materials such as tailings, waste rocks, cement, water and the like, and CO is rarely researched 2 The mineralization and the filling are combined, and a composite filling material and CO which meet the deep filling condition are not found 2 An integrated process of mineralization filling and geological storage. Based on the method, the invention provides a method for mineralizing CO by using/mining solid wastes 2 The method for preparing mine cemented filling material optimizes the original mineralization processA high-efficiency mineralization process which can be applied industrially is provided, and the problem of CO is solved 2 The emission reduction problem of the tail end is solved, and the CO is improved 2 The additional benefit of the method realizes reasonable and efficient treatment of the mine goaf and the tailings.
In order to solve the technical problem, the invention adopts the following technical scheme:
mineralization of CO by solid waste of mining industry 2 The method for preparing the mine cemented filling material comprises the following steps:
s1, grinding industrial/mining solid wastes and then uniformly mixing the ground industrial/mining solid wastes with ammonium nitrate;
s2, placing the mixed raw material obtained in the step S1 in a reactor for molten salt activation, collecting ammonia gas generated in the activation process, and converting metals including Ca, mg and Al in the activated raw material into corresponding metal nitrates;
s3, performing water immersion treatment on the metal nitrate activated mixture obtained in the step S2, and filtering to obtain the active mixture with the main component of SiO 2 The water-soaked slag and Ca are rich 2+ 、Mg 2+ 、Al 3+ The water extract of (2);
s4, collecting the ammonia gas collected in the step S2, the water immersion liquid obtained in the step S3, and CO prepared in advance 2 Introducing into a reaction vessel to perform carbonation reaction to mineralize CO 2 Filtering to obtain filtrate containing ammonium nitrate and main phase of CaCO 3 、MgCO 3 、Al 2 (CO 3 ) 3 The mineralized slag;
s5, mixing the mineralized slag obtained in the step S4 with cement and gypsum to prepare a novel cementing material;
and S6, mixing and stirring the cementing material obtained in the step S5 with water and full tailings by using a cement mortar stirrer to prepare the mine cemented filling material for the underground space to be filled.
Further, the granularity of the industrial/mining solid waste after grinding in the step S1 is 60-200 μm, and the mass ratio of the ground industrial/mining solid waste to ammonium nitrate is 1:2 to 1:8, uniformly mixing.
Further, the temperature of molten salt activation in the step S2 is 250-450 ℃, and the time of molten salt activation is 40-90 min.
Further, the solid-to-liquid ratio (g/ml) of the water immersion treatment in the step S3 is 1:2 to 1:10, the temperature of the water immersion treatment is 20-90 ℃, and the time of the water immersion treatment is 10-90 min.
Further, the reaction container in the step S4 is an ammonia water wetted wall tower reactor, and the molar ratio of the metal salt in the water extract to the introduced ammonia gas is 1: 1.5-1: 2, the mineralization temperature is 20-90 ℃, the mineralization time is 60-120min 2 The partial pressure is 0.15-2 MPa.
Further, evaporating, cooling and crystallizing the filtrate containing ammonium nitrate in the step S4 to obtain ammonium nitrate, and returning the ammonium nitrate to the step S1 for recycling.
Further, the mass ratios of the mineralized slag, the cement and the gypsum in the step S5 are respectively 75%, 10% and 15%.
Further, the mass ratio of the cementing material to the full tailings in the step S6 is 1:5 to 1:10, the concentration of the prepared mine cemented filling material is 68-72%.
Further, the mass ratio of the cementing material to the full tailings in the step S6 is 1: and 8, the concentration of the prepared mine cemented filling material is 70 percent.
Compared with the prior art, the invention provides the method for mineralizing CO by using/mining solid wastes 2 Method for preparing mine cemented filling material, and innovatively mixing CO 2 Mineralization technique and CO 2 Organically fusing geological sequestration technologies to form CO 2 The mineralization filling and geological storage integrated technology effectively utilizes industrial/mine solid wastes to reduce mine filling cost and simultaneously improves CO 2 The economy, safety, stability and sustainability of the terminal emission reduction technology, and on the other hand, the improvement of CO 2 CO avoidance while reducing emission effects 2 The various risks and uncertainties of gas sequestration, therefore have the following advantages over the prior art:
1. mineralization of CO from mining/mining solid waste 2 The carbon emission is effectively reduced from the source, the greenhouse effect is relieved, and a new way is provided for reducing the carbon emission;
2. realize mine filling andenergy saving and emission reduction, CO 2 The organic combination of mineralization and geological storage not only realizes the real green mining, but also solves the problem of CO 2 Instability of sequestration;
3. the strength of the full tailing filling body of the cemented filling material prepared by the innovative formula is superior to that of a 32.5# cement full tailing filling body, and the mineralized slag mixture with good cementing effect replaces cement in the traditional cemented filling material to serve as a cementing material, so that the filling material with higher strength and better performance can be obtained, the environmental pollution caused by using a large amount of cement is avoided, and a new way is provided for cemented filling mining.
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FIG. 1 is a process for mineralizing CO with/from industrial solid waste provided by the present invention 2 A schematic flow chart of a method for preparing the mine cemented filling material.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.
Referring to FIG. 1, the present invention provides a method for mineralizing CO from solid wastes of mining and industry 2 The method for preparing the mine cemented filling material comprises the following steps:
s1, grinding industrial/mining solid wastes and then uniformly mixing the ground industrial/mining solid wastes with ammonium nitrate;
s2, placing the mixed raw materials in the step S1 in a reactor for molten salt activation, collecting ammonia gas generated in the activation process, and converting metals including Ca, mg and Al in the activated raw materials into corresponding metal nitrates;
s3, performing water immersion treatment on the metal nitrate activated mixture obtained in the step S2, and filtering to obtain the active mixture with the main component of SiO 2 The water-soaked slag and Ca are rich 2+ 、Mg 2+ 、Al 3+ The water leaching solution of (2);
s4, collecting the ammonia gas collected in the step S2, the water immersion liquid obtained in the step S3, and CO prepared in advance 2 Introducing into a reaction vessel to perform carbonation reaction to mineralize CO 2 Filtering to obtain ammonium Nitrate (NH) 4 NO 3 ) The filtrate and the main phase of the filtrate are CaCO 3 、MgCO 3 、Al 2 (CO 3 ) 3 The mineralized slag;
s5, mixing the mineralized slag obtained in the step S4 with cement and gypsum to prepare a novel cementing material;
and S6, mixing and stirring the cementing material obtained in the step S5 with water and full tailings by using a cement mortar stirrer to prepare a mine cemented filling material for the underground space to be filled, and then transporting the prepared mine cemented filling material to the underground space to be filled for use.
As a specific embodiment, the particle size of the industrial/mining solid waste after grinding in the step S1 is 60 to 200 μm, and the mass ratio of the industrial/mining solid waste after grinding to ammonium nitrate is 1:2 to 1:8, thereby ensuring that the industrial/mining solid wastes can fully react.
As a specific implementation mode, the temperature of the molten salt activation in the step S2 is 250-450 ℃, and the time of the molten salt activation is 40-90 min, so that the raw materials can be fully activated.
In a specific embodiment, the solid-to-liquid ratio (g/ml) of the water immersion treatment in step S3 is 1:2 to 1:10, the temperature of the water leaching treatment is 20-90 ℃, and the time of the water leaching treatment is 10-90 min, so that the calcium, magnesium and aluminum elements in the industrial/mining solid waste can be fully extracted and leached.
As a specific implementation mode, the reaction vessel in the step S4 is an existing ammonia water wetted wall tower reactor, and the molar ratio of the metal salt in the water leaching solution to the introduced ammonia gas is 1: 1.5-1: 2, the mineralization temperature is 20-90 ℃, the mineralization time is 60-120min 2 The partial pressure is 0.15-2 MPa, thus ensuring a certain mineralization reaction rate.
As a specific implementation mode, the filtrate containing ammonium nitrate in the step S4 is subjected to evaporation, cooling and crystallization to obtain ammonium nitrate, and the ammonium nitrate is returned to the step S1 for recycling, so that the method is economical and environment-friendly.
In a specific embodiment, the mass ratios of the mineralized slag, the cement and the gypsum in step S5 are respectively 75%, 10% and 15%, so that a cementing material with a good cementing effect can be obtained, and the strength of the filling body can be improved.
As a specific implementation manner, the mass ratio of the cementing material to the whole tailings in the step S6 is 1:5 to 1:10, the concentration of the prepared mine cemented filling material is 68-72%, so that the filling material meeting the filling requirements of different mine goafs can be obtained by blending the mass ratio of the cemented material to the whole tailings. As a preferred embodiment, the mass ratio of the cementing material to the whole tailings in the step S6 is 1: and 8, the concentration of the prepared mine cemented filling material is 70 percent.
For better understanding of the mineralization of CO with/from mining solid wastes provided by the present invention 2 The method for preparing the mine cemented filling material will be described in detail with reference to specific examples. This example utilized existing blast furnace slag to mineralize CO 2 The preparation method of the novel mine cemented filling material comprises the following specific steps:
s1, grinding the blast furnace slag to the granularity of 125 mu m by a crusher, and mixing the ground blast furnace slag with ammonium nitrate according to a mass ratio of 1:3, uniformly mixing;
s2, placing the mixed raw materials in the step S1 into a reactor, carrying out molten salt activation for 60min at the temperature of 370 ℃, collecting ammonia gas generated in the activation process, and converting metals including Ca, mg and Al in the activated raw materials into corresponding metal nitrates;
s3, mixing the metal nitrate activation mixture obtained in the step S2 according to the proportion of 1:5 solid-to-liquid ratio (g/ml) at 50 deg.C, soaking in water for 60min, and filtering to obtain SiO as main component 2 The water-soaked slag and Ca are rich 2+ 、Mg 2+ 、Al 3+ The water leaching solution of (2);
s4, collecting the ammonia gas collected in the step S2, the water immersion liquid obtained in the step S3, and CO prepared in advance 2 And (3) introducing an ammonia water wet wall tower reactor, wherein the molar ratio of metal salt in the water extract to introduced ammonia gas is 1:1.8, CO at a temperature of 70 ℃ 2 Mineralizing for 90min under the condition of partial pressure of 1MPa, and filtering to obtain the product containing NH 4 NO 3 The filtrate and the main phase of (A) are CaCO 3 、MgCO 3 、Al 2 (CO 3 ) 3 The mineralized slag;
s5, mixing the mineralized slag obtained in the step S4 with cement and gypsum according to the mass ratio of 75%, 10% and 15% to prepare a novel cementing material;
s6, mixing the cementing material obtained in the step S5 with water and full tailings by using a cement mortar mixer according to the proportion of 1:8, mixing and stirring the mortar according to the mass ratio to prepare the mine cemented filling material/slurry with the concentration of 70 percent, pouring the mine cemented filling material/slurry into a triple test mold with the thickness of 7.07cm multiplied by 7.07cm, and immediately using a cement cemented sand test body forming compaction table for compaction forming. Placing the formed cement mortar sample into a standard constant-temperature constant-humidity curing box with the temperature of 20 +/-1 ℃ and the humidity of not less than 90%, performing standard curing for 48h, then demolding, numbering the test block after demolding, continuing curing the test block in the curing box until the curing period (3 d, 7d and 28 d) is reached, and respectively testing the compressive strength of the test block in each period on an SANS digital display fixed displacement press. The compression strength of the novel cementing material filling body prepared under the process condition at each age is about 3 times of that of the existing 32.5# cement filling body, and the test results are shown in the table below.
Compared with the prior art, the invention provides the method for mineralizing CO by using/mining solid wastes 2 Method for preparing mine cemented filling material, and innovatively mixing CO 2 Mineralization of CO 2 The geological sealing and the mine filling and mining are organically combined. On one hand, the CO is improved while the industrial/mine solid waste is effectively utilized 2 Economy, safety, stability and sustainability of the terminal emission reduction technology; on the other hand, in increasing CO 2 CO avoidance while reducing emission effects 2 Various risks and uncertainties of gas sequestration provide a new idea and a new approach for realizing a double-carbon strategy and a green mining strategy. Therefore, compared with the prior art, the method has the advantages thatPoint:
1. mineralization of CO from mining/mining solid waste 2 The carbon emission is effectively reduced from the source, the greenhouse effect is relieved, and a new mode is provided for reducing the carbon emission;
2. realizes mine filling, energy conservation and emission reduction, and CO 2 The mineralization and geological storage are organically combined, so that not only is the real green mining realized, but also CO is solved 2 Instability of sequestration;
3. the strength of the full tailing filling body of the cemented filling material prepared by adopting the innovative formula is superior to that of a 32.5# cement full tailing filling body, and the mineralized slag mixture with good cementing effect replaces cement in the traditional cemented filling material to serve as the cementing material, so that the filling material with higher strength and better performance can be obtained, the environmental pollution caused by using a large amount of cement is avoided, and a new way is provided for cemented filling exploitation.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. Mineralization of CO by industrial/mining solid waste 2 The method for preparing the mine cemented filling material is characterized by comprising the following steps of:
s1, grinding industrial/mining solid wastes and then uniformly mixing the ground industrial/mining solid wastes with ammonium nitrate;
s2, placing the mixed raw material obtained in the step S1 in a reactor for molten salt activation, collecting ammonia gas generated in the activation process, and converting metals including Ca, mg and Al in the activated raw material into corresponding metal nitrates;
s3, performing water immersion treatment on the metal nitrate activated mixture obtained in the step S2, and filtering to obtain the active mixture with the main component of SiO 2 The water-soaked slag and Ca are rich 2+ 、Mg 2+ 、Al 3+ The water leaching solution of (2);
s4, collecting the ammonia gas collected in the step S2, the water immersion liquid obtained in the step S3, and CO prepared in advance 2 Introducing into a reaction vessel to perform carbonation reaction to mineralize CO 2 Filtering to obtain filtrate containing ammonium nitrate and main phase of CaCO 3 、MgCO 3 、Al 2 (CO 3 ) 3 The mineralized slag; wherein the reaction vessel is an ammonia water wetted wall tower reactor, the molar ratio of metal salt in the water immersion liquid to the introduced ammonia gas is 1: 1.5-1: 2, the mineralization temperature is 20-90 ℃, the mineralization time is 60-120min 2 The partial pressure is 0.15-2 MPa;
s5, mixing the mineralized slag obtained in the step S4 with cement and gypsum to prepare a cementing material;
and S6, mixing and stirring the cementing material obtained in the step S5 with water and full tailings by using a cement mortar stirrer to prepare the mine cemented filling material for the underground space to be filled.
2. Mineralising CO with/from industrial solid waste, according to claim 1 2 The method for preparing the mine cemented filling material is characterized in that the granularity of the industrial/mining solid waste after grinding in the step S1 is 60-200 mu m, and the mass ratio of the ground industrial/mining solid waste to ammonium nitrate is 1:2 to 1:8, uniformly mixing.
3. Mineralising CO with/from industrial solid waste, according to claim 1 2 The method for preparing the mine cemented filling material is characterized in that the temperature of molten salt activation in the step S2 is 250-450 ℃, and the time of molten salt activation is 40-90 min.
4. Mineralising CO with/from industrial solid waste, according to claim 1 2 The method for preparing the mine cemented filling material is characterized in that the solid-to-liquid ratio (g/ml) of the water leaching treatment in the step S3 is 1:2 to 1:10, the temperature of the water immersion treatment is 20-90 ℃, and the time of the water immersion treatment is 10-90 min.
5. According to claim 1Mineralizing CO with/from mining solid waste 2 The method for preparing the mine cemented filling material is characterized in that the filtrate containing ammonium nitrate in the step S4 is evaporated, cooled and crystallized to obtain ammonium nitrate, and the ammonium nitrate is returned to the step S1 for recycling.
6. Mineralizing CO with/from mining solid waste according to claim 1 2 The method for preparing the mine cemented filling material is characterized in that the mass ratios of the mineralized slag, the cement and the gypsum in the step S5 are respectively 75%, 10% and 15%.
7. Mineralising CO with/from industrial solid waste, according to claim 1 2 The method for preparing the mine cemented filling material is characterized in that the mass ratio of the cementing material to the full tailings in the step S6 is 1:5 to 1:10, the concentration of the prepared mine cemented filling material is 68-72%.
8. Mineralizing CO with/from mining solid waste according to claim 7 2 The method for preparing the mine cemented filling material is characterized in that the mass ratio of the cemented material to the whole tailings in the step S6 is 1: and 8, the concentration of the prepared mine cemented filling material is 70 percent.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106430264A (en) * | 2016-07-19 | 2017-02-22 | 四川大学 | Method for mineralizing CO2 with blast iron slag and co-producing alumina |
| CN110759676A (en) * | 2019-10-28 | 2020-02-07 | 北京科技大学 | Early-strength shrinkage-free full-tailings cemented filling material and preparation method thereof |
| WO2021074886A1 (en) * | 2019-10-18 | 2021-04-22 | Eni S.P.A. | A process for co2 mineralization with natural mineral phases and use of the products obtained |
| CN113213829A (en) * | 2021-05-21 | 2021-08-06 | 北京科技大学 | Tailing carbonization cemented filling method |
| CN114133170A (en) * | 2021-11-19 | 2022-03-04 | 内蒙古鄂尔多斯电力冶金集团股份有限公司 | Pit backfill material, preparation method and application thereof |
-
2022
- 2022-03-21 CN CN202210280209.2A patent/CN114538876B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106430264A (en) * | 2016-07-19 | 2017-02-22 | 四川大学 | Method for mineralizing CO2 with blast iron slag and co-producing alumina |
| WO2021074886A1 (en) * | 2019-10-18 | 2021-04-22 | Eni S.P.A. | A process for co2 mineralization with natural mineral phases and use of the products obtained |
| CN110759676A (en) * | 2019-10-28 | 2020-02-07 | 北京科技大学 | Early-strength shrinkage-free full-tailings cemented filling material and preparation method thereof |
| CN113213829A (en) * | 2021-05-21 | 2021-08-06 | 北京科技大学 | Tailing carbonization cemented filling method |
| CN114133170A (en) * | 2021-11-19 | 2022-03-04 | 内蒙古鄂尔多斯电力冶金集团股份有限公司 | Pit backfill material, preparation method and application thereof |
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