CN114620962A - Activated iron tailing powder, grouting material containing activated iron tailing powder and preparation method of grouting material - Google Patents
Activated iron tailing powder, grouting material containing activated iron tailing powder and preparation method of grouting material Download PDFInfo
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- CN114620962A CN114620962A CN202210248932.2A CN202210248932A CN114620962A CN 114620962 A CN114620962 A CN 114620962A CN 202210248932 A CN202210248932 A CN 202210248932A CN 114620962 A CN114620962 A CN 114620962A
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- iron tailing
- tailing powder
- powder
- activated iron
- grouting material
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/026—Comminuting, e.g. by grinding or breaking; Defibrillating fibres other than asbestos
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
-
- 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
- C04B28/04—Portland cements
-
- 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
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
-
- 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)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to the technical field of solid waste resource utilization. The invention provides activated iron tailing powder and a preparation method thereof. The preparation method comprises the following steps: grinding and drying the iron tailing powder and the grinding aid in sequence to obtain a mixture; and mixing the mixture with an active excitant and then exciting to obtain the activated iron tailing powder. The invention also provides a grouting material containing the activated iron tailing powder and a preparation method thereof. The solid waste grouting material has 28d compressive strength of over 60MPa, good fluidity, no shrinkage and micro-expansion effect. The utilization rate of the iron tailings is improved by activating the iron tailing powder, the consumption of natural resources is reduced, and the method is more environment-friendly.
Description
Technical Field
The invention relates to the technical field of solid waste resource utilization, in particular to activated iron tailing powder, a grouting material containing the activated iron tailing powder and a preparation method of the grouting material.
Background
The cement grouting material is a dry mixed material which is industrially produced and has reasonable fractions and is prepared from raw materials such as cement, aggregate, an additive, a mineral admixture and the like. After being mixed with water uniformly, the product has the properties of pourable fluidity, micro-expansion, high early and later strength, no bleeding and the like. Because of its excellent performance, the cement-based grouting material has been widely used in anchor bolt anchoring, emergency repair of runways, reinforcement of road and bridge engineering, secondary grouting of machine bases, equipment foundations, steel bar planting, reinforcement and reconstruction of concrete structures, crack management of old concrete structures, building reinforcement, enlargement of beam-column cross sections, thickening of wall structures and repair of leakage water, collapse grouting of various foundation engineering, various emergency repair engineering, and the like.
With the development of construction industry, the problem of over mining and serious shortage of supply of natural sand in concrete is faced, and the destruction of river farmland caused by over mining, the state has already made the regulations of mining prohibition or limited mining, and the search of natural sand substitutes is urgent. The iron tailing sand is fine sandy waste generated after mineral separation in an iron ore plant, has huge yield, is mainly treated at present by building a warehouse and is accumulated, not only occupies a large amount of land, but also pollutes the environment.
Therefore, a method for preparing grouting material with high compressive strength by replacing natural sand with iron tailing sand is researched and developed to solve the problems of over mining and serious shortage of supply of the natural sand and the problems of large occupation of land and environmental pollution of the iron tailing sand in the prior art.
Disclosure of Invention
The invention aims to provide an activated iron tailing powder, a grouting material containing the activated iron tailing powder and a preparation method thereof aiming at the defects of the prior art.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a preparation method of activated iron tailing powder, which comprises the following steps:
1) grinding and drying the iron tailing powder and the grinding aid in sequence to obtain a mixture;
2) and mixing the mixture with an active excitant and then exciting to obtain the activated iron tailing powder.
Preferably, the particle size of the iron tailings powder in the step 1) is less than or equal to 0.075 mm; the grinding aid is ethylene glycol and/or desulfurized gypsum.
Preferably, the mass ratio of the iron tailing powder to the grinding aid in the step 1) is 20-30: 1 to 2.
Preferably, the grinding time in the step 1) is 40-60 min; the drying temperature is 90-110 ℃, and the drying time is 4-6 h.
Preferably, the mass ratio of the activity excitant in the step 2) to the iron tailing powder in the step 1) is 5-10: 20-30; the activity excitant is hydrochloric acid solution, sulfuric acid solution or phosphoric acid solution; the mass concentration of the activity excitant is 1.5-3%; the excitation time is 10-14 h.
The invention also provides the activated iron tailing powder prepared by the preparation method.
The invention also provides a grouting material containing the activated iron tailing powder, which comprises cement, iron tailing sand, fine aggregate, the activated iron tailing powder, fly ash, water, a water reducing agent, a defoaming agent and an expanding agent;
the mass ratio of the cement, the iron tailing sand, the fine aggregate, the activated iron tailing powder, the fly ash and the water is 40-50: 25-35: 10-15: 4-6: 2-6: 13-31;
the mass ratio of the water reducing agent to the defoaming agent to the expanding agent is 10-30: 1-3: 2-4;
the mass ratio of the total mass of the cement, the activated iron tailing powder and the fly ash to the water reducing agent is 46-62: 1 to 3.
Preferably, the water reducing agent is a polycarboxylic acid water reducing agent; the defoaming agent is polyethylene glycol, an organic silicon solution or dibutyl phosphate; the swelling agent is a UEA swelling agent and/or a plastic swelling agent.
The invention also provides a preparation method of the grouting material containing the activated iron tailing powder, which comprises the following steps:
1) mixing cement, iron tailing sand, fine aggregate, activated iron tailing powder, fly ash and part of water to obtain pure slurry;
2) and mixing the water reducing agent, the defoaming agent, the expanding agent, the residual water and the clean slurry to obtain the grouting material containing the activated iron tailing powder.
Preferably, the particle size of the iron tailing sand in the step 1) is 0.15-2.36 mm; and the mass of the part of water accounts for 10-20% of the total mass of the cement, the activated iron tailing powder and the fly ash.
The beneficial effects of the invention include the following:
1) according to the invention, the grinding aid is added when the activated iron tailing powder is prepared, so that the agglomeration phenomenon of the iron tailing powder in the grinding process is reduced, and the specific surface area of the iron tailing powder is increased.
2) The early compressive strength of the grouting material containing the activated iron tailing powder is obviously improved, the water requirement in the mixing process is reduced by adding the polycarboxylic acid water reducing agent, and the workability of the grouting material is improved.
3) The grouting material containing the activated iron tailing powder has good final compressive strength and micro-expansibility. By strictly controlling the water-cement ratio and adding a proper amount of fly ash and UEA expanding agent and/or plastic expanding agent, the compressive strength of the grouting material is improved, and the contractibility of the cement-based material is improved.
Detailed Description
The invention provides a preparation method of activated iron tailing powder, which comprises the following steps:
1) grinding and drying the iron tailing powder and the grinding aid in sequence to obtain a mixture;
2) and mixing the mixture with an active excitant and then exciting to obtain the activated iron tailing powder.
In the invention, the particle size of the iron tailing powder in the step 1) is less than or equal to 0.075mm, preferably 0.035-0.075 mm, further preferably 0.045-0.065 mm, and more preferably 0.050-0.060 mm; the grinding aid is ethylene glycol and/or desulfurized gypsum, preferably ethylene glycol or desulfurized gypsum, and further preferably ethylene glycol.
The grinding aid provided by the invention reduces the agglomeration phenomenon of iron tailing powder in the grinding process, and reduces the specific surface area of the iron tailing powder.
In the invention, the mass ratio of the iron tailing powder and the grinding aid in the step 1) is 20-30: 1-2, preferably 23-27: 1.3 to 1.7, and more preferably 25: 1.5.
In the invention, the grinding time in the step 1) is 40-60 min, preferably 45-55 min, further preferably 48-52 min, and more preferably 50 min; the drying temperature is 90-110 ℃, preferably 95-105 ℃, further preferably 97-103 ℃, and more preferably 100 ℃; the drying time is 4-6 h, preferably 4.2-5.8 h, more preferably 4.5-5.5 h, and even more preferably 5 h.
In the invention, the mass ratio of the active exciting agent in the step 2) to the iron tailing powder in the step 1) is 5-10: 20-30, preferably 6-9: 22 to 28, more preferably 7 to 8: 24-26; the activity excitant is hydrochloric acid solution, sulfuric acid solution or phosphoric acid solution, preferably hydrochloric acid solution; the mass concentration of the activity excitant is 1.5-3%, preferably 1.7-2.8%, further preferably 1.9-2.6%, and more preferably 2.0-2.5%; the excitation time is 10-14 h, preferably 11-13 h, and further preferably 12 h.
The invention also provides the activated iron tailing powder prepared by the preparation method.
The invention also provides a grouting material containing the activated iron tailing powder, which comprises cement, iron tailing sand, fine aggregate, the activated iron tailing powder, fly ash, water, a water reducing agent, a defoaming agent and an expanding agent;
the mass ratio of the cement, the iron tailing sand, the fine aggregate, the activated iron tailing powder, the fly ash and the water is 40-50: 25-35: 10-15: 4-6: 2-6: 13-31, preferably 42-48: 27-33: 11-14: 4.5-5.5: 2.5-5.5: 15-29; more preferably 44 to 46: 29-31: 12-13: 4.8-5.2: 3.5-4.5: 17-27;
the mass ratio of the water reducing agent to the defoaming agent to the expanding agent is 10-30: 1-3: 2 to 4, preferably 15 to 25:1.5 to 2.5:2.5 to 3.5;
the mass ratio of the total mass of the cement, the activated iron tailing powder and the fly ash to the water reducing agent is 46-62: 1-3, preferably 48-60: 2 to 3.
In the invention, the water reducing agent is a polycarboxylic acid water reducing agent, preferably an early-strength polycarboxylic acid water reducing agent; the defoaming agent is polyethylene glycol, an organic silicon solution or dibutyl phosphate, preferably polyethylene glycol or dibutyl phosphate, and further preferably polyethylene glycol; the swelling agent is a UEA swelling agent and/or a plastic swelling agent, preferably a UEA swelling agent or a plastic swelling agent, and more preferably a UEA swelling agent.
The polycarboxylic acid water reducing agent disclosed by the invention reduces the water demand in the mixing process and improves the workability of the grouting material.
In the present invention, the cement is preferably portland cement, and more preferably P · O42.5 portland cement.
In the invention, the fly ash is preferably first-grade fly ash; the fine aggregate is preferably recycled fine aggregate.
The invention also provides a preparation method of the grouting material containing the activated iron tailing powder, which comprises the following steps:
1) mixing cement, iron tailing sand, fine aggregate, activated iron tailing powder, fly ash and part of water to obtain pure slurry;
2) and mixing the water reducing agent, the defoaming agent, the expanding agent, the residual water and the clean slurry to obtain the grouting material containing the activated iron tailing powder.
In the invention, the particle size of the iron tailing sand in the step 1) is 0.15-2.36 mm, preferably 0.55-1.96 mm, more preferably 1-1.51 mm, and more preferably 1.2-1.31 mm; the mass of the part of water accounts for 10-20% of the total mass of the cement, the activated iron tailing powder and the fly ash, preferably 12-18%, and further preferably 14-16%.
In the invention, the mixture in the step 2) is stirred; the stirring time is 2-4 min, preferably 3 min.
The technical solutions provided by the present invention are described in detail below with reference to examples, but they should not be construed as limiting the scope of the present invention.
Example 1
Mixing and grinding 20g of iron tailing powder with the particle size of 0.075mm and 1g of desulfurized gypsum for 40min, drying the mixture at 90 ℃ for 4h, adding 5g of hydrochloric acid solution with the mass concentration of 1.5%, stirring and mixing for excitation for 10h, standing for 1h after excitation is finished, discharging, and airing to obtain the activated iron tailing powder.
50g of ordinary portland cement, 35g of iron tailing sand with the particle size of 2.36mm, 15g of recycled fine aggregate, 6g of activated iron tailing powder, 6g of fly ash and 6.2g of water are fully stirred, and then 1g of polycarboxylic acid water reducing agent, 0.1g of organic silicon solution, 0.2g of plastic expanding agent and 24.8g of water are added into a concrete stirrer to be stirred for 2min, so that grouting material containing the activated iron tailing powder is obtained.
Example 2
Grinding 30g of iron tailing powder with the particle size of 0.055mm, 1g of ethylene glycol and 1g of desulfurized gypsum for 60min, drying the mixture at 110 ℃ for 6h, adding 10g of phosphoric acid solution with the mass concentration of 3%, stirring and mixing for excitation for 14h, standing for 1h after excitation is finished, discharging, and airing to obtain the activated iron tailing powder.
After 40g P & O42.5 ordinary portland cement, 25g of iron tailing sand with the particle size of 0.15mm, 10g of recycled fine aggregate, 4g of activated iron tailing powder, 2g of fly ash and 9.2g of water are fully stirred, 2.4g of early strength type polycarboxylate water reducer, 0.2g of dibutyl phosphate, 0.4g of UEA expanding agent and 4.8g of water are added into a concrete stirrer and stirred for 4min, and the grouting material containing the activated iron tailing powder is obtained.
Example 3
Grinding 25g of iron tailing powder with the particle size of 0.060mm and 1.5g of ethylene glycol for 50min, drying the mixture at 100 ℃ for 5h, adding 7.5g of sulfuric acid solution with the mass concentration of 2.5%, stirring and mixing for excitation for 12h, standing for 1h after excitation is finished, discharging, and airing to obtain the activated iron tailing powder.
After 45g P & O42.5 ordinary portland cement, 30g of iron tailing sand with the particle size of 1.5mm, 13g of recycled fine aggregate, 5g of activated iron tailing powder, 4g of first-grade fly ash and 8.1g of water are fully stirred, 2g of early strength type polycarboxylate water reducer, 0.2g of polyethylene glycol, 0.15g of UEA expanding agent, 0.15g of plastic expanding agent and 13.9g of water are added and stirred for 3min, and the grouting material containing the activated iron tailing powder is obtained.
The performance test results of the grouting materials of examples 1 to 3 are shown in Table 1.
TABLE 1 Performance test results of the grouting materials of examples 1 to 3
As can be seen from Table 1, the grouting material containing the activated iron tailing powder has excellent comprehensive performance, the 28d compressive strength can reach more than 60MPa, the fluidity is good, no shrinkage exists, and the grouting material has a micro-expansion effect. The comprehensive utilization rate of the iron tailing powder is improved through activating the iron tailing powder, the consumption of natural resources is reduced, and the method is more environment-friendly.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The preparation method of the activated iron tailing powder is characterized by comprising the following steps:
1) grinding and drying the iron tailing powder and the grinding aid in sequence to obtain a mixture;
2) and mixing the mixture with an active excitant and then exciting to obtain the activated iron tailing powder.
2. The preparation method according to claim 1, wherein the particle size of the iron tailings powder in the step 1) is less than or equal to 0.075 mm; the grinding aid is ethylene glycol and/or desulfurized gypsum.
3. The preparation method according to claim 1 or 2, wherein the mass ratio of the iron tailing powder and the grinding aid in the step 1) is 20-30: 1 to 2.
4. The preparation method according to claim 3, wherein the grinding time in the step 1) is 40-60 min; the drying temperature is 90-110 ℃, and the drying time is 4-6 h.
5. The preparation method according to claim 4, wherein the mass ratio of the activity excitant in the step 2) to the iron tailings powder in the step 1) is 5-10: 20-30 parts of; the activity excitant is hydrochloric acid solution, sulfuric acid solution or phosphoric acid solution; the mass concentration of the activity excitant is 1.5-3%; the excitation time is 10-14 h.
6. The activated iron tailings powder prepared by the method according to any one of claims 1 to 5.
7. The grouting material containing the activated iron tailing powder is characterized by comprising cement, iron tailing sand, fine aggregate, the activated iron tailing powder, fly ash, water, a water reducing agent, a defoaming agent and an expanding agent;
the mass ratio of the cement, the iron tailing sand, the fine aggregate, the activated iron tailing powder, the fly ash and the water is 40-50: 25-35: 10-15: 4-6: 2-6: 13 to 31;
the mass ratio of the water reducing agent to the defoaming agent to the expanding agent is 10-30: 1-3: 2-4;
the mass ratio of the total mass of the cement, the activated iron tailing powder and the fly ash to the water reducing agent is 46-62: 1 to 3.
8. The activated iron tailings powder-containing grouting material of claim 7, wherein the water reducing agent is a polycarboxylic acid water reducing agent; the defoaming agent is polyethylene glycol, an organic silicon solution or dibutyl phosphate; the swelling agent is a UEA swelling agent and/or a plastic swelling agent.
9. The method for preparing the grouting material containing the activated iron ore tailings powder as claimed in claim 7 or 8, characterized by comprising the following steps:
1) mixing cement, iron tailing sand, fine aggregate, activated iron tailing powder, fly ash and part of water to obtain pure slurry;
2) and mixing the water reducing agent, the defoaming agent, the expanding agent, the residual water and the clean slurry to obtain the grouting material containing the activated iron tailing powder.
10. The preparation method according to claim 9, wherein the particle size of the iron tailings sand in the step 1) is 0.15-2.36 mm; and the mass of the part of water accounts for 10-20% of the total mass of the cement, the activated iron tailing powder and the fly ash.
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| CN113185224A (en) * | 2021-04-30 | 2021-07-30 | 安徽工业大学 | Novel building mortar taking iron tailing powder as raw material and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117819867A (en) * | 2024-03-05 | 2024-04-05 | 天津冶建特种材料有限公司 | Iron tailing-based baking-free brick and preparation method thereof |
| CN117819867B (en) * | 2024-03-05 | 2024-05-14 | 天津冶建特种材料有限公司 | Iron tailing-based baking-free brick and preparation method thereof |
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