CN106631107B - Mica tailing aerated building block and preparation method thereof - Google Patents
Mica tailing aerated building block and preparation method thereof Download PDFInfo
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- CN106631107B CN106631107B CN201610882457.9A CN201610882457A CN106631107B CN 106631107 B CN106631107 B CN 106631107B CN 201610882457 A CN201610882457 A CN 201610882457A CN 106631107 B CN106631107 B CN 106631107B
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- mica
- building block
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- tailing
- tailings
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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
- C04B28/10—Lime cements or magnesium oxide 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
- 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
-
- 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
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- 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
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
-
- 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
Abstract
The invention discloses a mica tailing aerated building block and a preparation method thereof, wherein mica tailing is ground to 80 mu m with the screen residue of below 20 percent, calcium components, aluminum powder, reinforcing components and auxiliary components are weighed and mixed with the ground mica tailing, water is added for stirring, the mixture is filled into a mold for gas generation, the mixture is demoulded and then put into an autoclave for autoclave curing, and the mixture is taken out of the autoclave after cooling, so that the mica tailing aerated building block is obtained; the mica tailing aerated building block consists of mica tailings, calcareous components, aluminum powder, reinforcing components and auxiliary components. The usage amount of the mica tailings in the mixing proportion can reach 70 percent; the building block achieves the following properties: the compressive strength is 1.0-15.0 MPa; a dry density of 300 to 1000kg/m3(ii) a The drying shrinkage value is less than or equal to 0.5 mm/m; freezing resistance: the mass loss is less than or equal to 5 percent; the thermal conductivity (dry state) is less than or equal to 0.20W/m.K.
Description
Technical Field
The invention belongs to the technical field of resource utilization of industrial solid wastes, and particularly relates to a mica tailing aerated building block and a preparation method thereof.
Background
In the mica production process, a large amount of tailings are generated, the stacking not only occupies a large amount of land, but also causes serious environmental pollution, and the resource utilization is urgently needed.
The currently used building aerated building blocks are produced by mainly using quartz powder, clay, fly ash and the like as main siliceous raw materials, matching with calcareous raw materials and adopting an autoclaved process.
At present, no effective utilization method exists for mica tailings, and if the mica tailings are used as siliceous raw materials to prepare aerated building blocks for building engineering, a large amount of the aerated building blocks can be consumed, so that waste is changed into valuable. However, the chemical composition and mineral composition of the mica tailings are greatly different from those of the currently used siliceous materials, and particularly, the mica tailings are used as the siliceous materials to prepare the aerated building blocks, and the technical problems of the fine grinding degree, the mix proportion design, the corresponding autoclaved system parameters and the like of the aerated building blocks are not solved. The method is to make clear the key process parameters such as proper fine grinding fineness, proper matching proportion of each component material, proper steam-pressing temperature, proper steam-pressing time and the like when mica tailings are used for preparing the aerated building block.
Disclosure of Invention
The invention aims to provide a mica tailing aerated building block and a preparation method thereof, aims to provide an effective way for large-scale resource utilization of mica tailings, and solves the technical problems of fine grinding fineness, mix proportion design, corresponding autoclaved system parameters and the like of the aerated building block prepared by using the mica tailings as siliceous raw materials.
The invention is realized in such a way that the preparation method of the mica tailing aerated building block comprises the following steps:
grinding mica tailings until the fineness reaches below 20 percent of the screen residue of a 80 mu m sieve;
weighing 20-50% of calcareous component, 0.05-0.2% of aluminum powder, 1-5% of reinforcing component, 1-5% of auxiliary component and 40-70% of ground mica tailings according to the mass ratio, and adding into a stirrer; adding water accounting for 25-40% of the mixed powder, stirring uniformly, putting into a die, standing for 1-1.5 hours at 40-80 ℃, and carrying out gas generation;
cutting the die into the required size after demoulding, and placing the die into an autoclave for autoclaving at the temperature of 160-230 ℃ for 5-10 hours;
and (4) cooling, and taking out of the kettle to obtain the mica tailing aerated building block.
The invention also aims to provide the mica tailing aerated building block which comprises, by mass, 40-70% of mica tailings, 20-50% of calcareous components, 1-5% of reinforcing components, 0.05-0.2% of gas-forming components and 1-5% of auxiliary components.
Further, the calcium component is as follows: one or a mixture of more than two of quick lime, hydrated lime, cement and carbide slag; the mica tailings are siliceous components.
Further, the reinforcing component is: one or a mixture of more than two of glass fiber, rock wool inorganic fiber and paper pulp organic fiber.
Further, the gas generating component is aluminum powder; the auxiliary components are as follows: one or a mixture of more than two of gypsum, fly ash, steel slag, slag and coal gangue.
Further, the mica tailings and the calcareous component account for the mass percent according to CaO/SiO2The molar ratio (abbreviated as C/S) is determined, and the CaO/SiO is2The molar ratio is 0.6 to 2.0.
The invention also aims to provide the building aerated building block prepared by the preparation method of the mica tailing aerated building block.
According to the mica tailing aerated building block and the preparation method thereof, the using amount of mica tailings in the mixing proportion can be up to 70%; the building block achieves the following properties: the compressive strength is 1.0-15.0 MPa; dry density 300-3(ii) a The drying shrinkage value is less than or equal to 0.5 mm/m; freezing resistance: the mass loss is less than or equal to 5 percent; the thermal conductivity (dry state) is less than or equal to 0.20W/m.K.
Drawings
Fig. 1 is a flow chart of a preparation method of the mica tailing aerated block provided by the embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The application of the principles of the present invention will now be further described with reference to the accompanying drawings.
As shown in fig. 1: the preparation method of the mica tailing aerated building block provided by the embodiment of the invention comprises the following steps:
s101: grinding mica tailings until the fineness reaches below 20 percent of the screen residue of a 80 mu m sieve;
s102: weighing 20-50% of calcareous component, 0.05-0.2% of aluminum powder, 1-5% of reinforcing component, 1-5% of auxiliary component and 40-70% of ground mica tailings according to the mass ratio, and adding into a stirrer; adding water accounting for 25-40% of the mixed powder, stirring uniformly, putting into a die, standing for 1-1.5 hours at 40-80 ℃, and carrying out gas generation;
s103: cutting the die into the required size after demoulding, and placing the die into an autoclave for autoclaving at the temperature of 160-230 ℃ for 5-10 hours;
s104: and (4) cooling, and taking out of the kettle to obtain the mica tailing aerated building block.
The embodiment of the invention provides a mica tailing aerated building block which comprises, by mass, 40-70% of mica tailings, 20-50% of calcareous components, 1-5% of reinforcing components, 0.05-0.2% of gas-forming components and 1-5% of auxiliary components.
Further, the mica tailings are siliceous components, and the calcareous components are one or a mixture of more than two of quicklime, hydrated lime, cement and carbide slag;
further, the reinforcing component is one or a mixture of more than two of glass fiber, rock wool inorganic fiber and paper pulp organic fiber.
Further, the gas generating component is aluminum powder; the auxiliary component is one or a mixture of more than two of gypsum, fly ash, steel slag, slag and coal gangue.
Further, the mica tailings and the calcareous component account for the mass percent according to CaO/SiO2Determination of the molar ratio, CaO/SiO2The molar ratio is 0.6 to 2.0.
The application of the principles of the present invention will now be described in further detail with reference to specific embodiments.
The basic mix ratio of the present invention is shown in Table 1. The effects of C/S, autoclaving temperature and time are shown in tables 2 and 3.
TABLE 1 basic mix proportions
| Numbering | C/S | Mica tailings (%) | Quick lime (%) |
| 1 | 0.8 | 56 | 44 |
| 2 | 1.0 | 50 | 50 |
| 3 | 1.2 | 45 | 55 |
| 4 | 1.4 | 39.2 | 60.8 |
TABLE 2 results of experiments on the influence of C/S, autoclaving temperature and time (5h) on the strength
| C/S | 0.8 | 1.0 | 1.2 | 1.4 |
| 140℃，5h | 1.733 | 1.800 | 2.744 | 2.110 |
| 160℃，5h | 5.592 | 5.596 | 3.825 | 5.550 |
| 180℃，5h | 6.475 | 6.890 | 7.725 | 6.895 |
Note: the fineness of the mica tailings under the maintenance system is 10 percent; the strength units in the table are in MPa.
TABLE 3 influence of C/S, autoclaving temperature and time (7h) on the strength test results
| C/S | 0.8 | 1.0 | 1.2 | 1.4 |
| 140℃，7h | 5.244 | 2.850 | 3.325 | 2.779 |
| 160℃，7h | 4.263 | 2.550 | 3.383 | 3.395 |
| 180℃，7h | 9.055 | 7.170 | 8.600 | 8.600 |
Note: the fineness of the mica tailings under the maintenance system is 10 percent; the strength units in the table are in MPa.
In addition, the strength can be increased by 5-10% by adding gypsum; the strength can be improved by 5 to 10 percent by adding the reinforcing material.
According to corresponding national standards, the strength exceeding 1.0MPa meets the corresponding grade requirement. The specific strength is determined according to actual engineering requirements. From the above data, it can be seen that products of different strengths can be prepared by adjusting the mix ratio and steam-curing parameters.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (4)
1. The preparation method of the mica tailing aerated building block is characterized by comprising the following steps:
grinding mica tailings until the fineness reaches below 20 percent of the screen residue of a 80 mu m sieve;
weighing 20-50% of calcium component, 1-5% of reinforcing component, 0.05-0.2% of gas generating component, 1-5% of auxiliary component and 40-70% of ground mica tailings according to the mass ratio, and adding into a stirrer; adding water accounting for 25-40% of the mixed powder, stirring uniformly, putting into a die, standing for 1-1.5 hours at 40-80 ℃, and carrying out gas generation;
the reinforced component is one or a mixture of more than two of glass fiber, rock wool inorganic fiber and paper pulp organic fiber;
the gas generating component is aluminum powder;
the auxiliary component is one or a mixture of more than two of gypsum, fly ash, steel slag, slag and coal gangue;
the mass percentage of the siliceous component and the calcareous component is CaO/SiO2Determination of the molar ratio, CaO/SiO2The molar ratio is 0.6-2.0;
cutting the die into the required size after demoulding, and placing the die into an autoclave for autoclaving at the temperature of 160-230 ℃ for 5-10 hours;
after cooling, taking out of the kettle to obtain the mica tailing aerated building block;
the building block achieves the following properties: the compressive strength is 1.0-15.0 MPa; dry density 300-3(ii) a The drying shrinkage value is less than or equal to 0.5 mm/m; freezing resistance: the mass loss is less than or equal to 5 percent; the dry heat conductivity coefficient is less than or equal to 0.20W/m.K.
2. The mica tailing aerated building block prepared by the preparation method of the mica tailing aerated building block according to claim 1 is characterized by comprising, by mass, 40% -70% of mica tailings, 20% -50% of calcareous components, 1% -5% of reinforcing components, 0.05% -0.2% of gas-forming components and 1% -5% of auxiliary components.
3. The mica tailings aerated block of claim 2, wherein the mica tailings are provided as a siliceous component; one or more of quicklime, hydrated lime, cement and carbide slag as calcium component.
4. A building aerated block prepared by the method for preparing the mica tailing aerated block of claim 1.
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| CN107140918A (en) * | 2017-07-04 | 2017-09-08 | 河南理工大学 | A kind of method that use mica mine tailing prepares gold brick |
| CN107902969A (en) * | 2017-11-27 | 2018-04-13 | 安徽省润乾节能建材科技股份有限公司 | A kind of method using mica sand waste production aerated bricks |
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| CN1313259A (en) * | 2000-07-15 | 2001-09-19 | 华南理工大学 | Process for preparing light building blocks of powdered coal ash for wall |
| CN101948285A (en) * | 2010-10-09 | 2011-01-19 | 南京明裕恒材料科技有限公司 | Calcium silicate material prepared from waste ceramic powder and preparation method thereof |
| CN103332916A (en) * | 2013-06-03 | 2013-10-02 | 铜陵丰泽建材科技有限公司 | Aerated concrete block with composition of mica powder and fly ash and preparation method |
| CN104193391A (en) * | 2014-08-22 | 2014-12-10 | 山东省环能设计院有限公司 | Aerated concrete and preparation method thereof |
| CN104557107A (en) * | 2014-12-16 | 2015-04-29 | 山东益丰生化环保股份有限公司盛源新型建材分公司 | Light-weight autoclaved aerated concrete and preparation process thereof |
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- 2016-10-10 CN CN201610882457.9A patent/CN106631107B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1313259A (en) * | 2000-07-15 | 2001-09-19 | 华南理工大学 | Process for preparing light building blocks of powdered coal ash for wall |
| CN101948285A (en) * | 2010-10-09 | 2011-01-19 | 南京明裕恒材料科技有限公司 | Calcium silicate material prepared from waste ceramic powder and preparation method thereof |
| CN103332916A (en) * | 2013-06-03 | 2013-10-02 | 铜陵丰泽建材科技有限公司 | Aerated concrete block with composition of mica powder and fly ash and preparation method |
| CN104193391A (en) * | 2014-08-22 | 2014-12-10 | 山东省环能设计院有限公司 | Aerated concrete and preparation method thereof |
| CN104557107A (en) * | 2014-12-16 | 2015-04-29 | 山东益丰生化环保股份有限公司盛源新型建材分公司 | Light-weight autoclaved aerated concrete and preparation process thereof |
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