CN110734270A - kinds of red mud baked bricks and preparation method thereof - Google Patents
kinds of red mud baked bricks and preparation method thereof Download PDFInfo
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- CN110734270A CN110734270A CN201911111135.4A CN201911111135A CN110734270A CN 110734270 A CN110734270 A CN 110734270A CN 201911111135 A CN201911111135 A CN 201911111135A CN 110734270 A CN110734270 A CN 110734270A
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- red mud
- brick
- bricks
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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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/1321—Waste slurries, e.g. harbour sludge, industrial muds
- C04B33/1322—Red mud
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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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
-
- 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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/1328—Waste materials; Refuse; Residues without additional clay
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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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/36—Glass starting materials for making ceramics, e.g. silica glass
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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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
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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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9669—Resistance against chemicals, e.g. against molten glass or molten salts
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Dispersion Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention discloses baked bricks prepared by taking red mud and waste glass as main raw materials, which are prepared from, by mass, 50-90wt% of red mud, 6-50wt% of waste glass and 5-25wt% of a binder, wherein the baked bricks are prepared by uniformly mixing, pressing, molding and sintering for cooling, and the red mud baked bricks have the following properties of compressive strength of 20-40MPa and flexural strength of 7-13MPa, and have the characteristics of , full utilization of red mud waste and reduction of harm to the environment, and have the characteristics of low price, stable chemical properties, high compressive and flexural strength and simple preparation process, and can meet requirements of pushing and using conditions and solve the problem of red mud pollution.
Description
Technical Field
The invention relates to a preparation method of red mud baked bricks, belonging to the field of manufacturing methods of baked bricks.
Background
The red mud is industrial waste generated in the process of producing aluminum, the total amount of the red mud generated in the world every year is about 0.7-1.2 hundred million tons at present, China is taken as the fourth alumina producing country, th alumina plant is built since 1945, with the vigorous development of the aluminum industry, the discharge amount of the red mud in China is increased day by day, more than 5000 ten thousand of the red mud discharged up to now is discharged every year, but the comprehensive utilization rate of the red mud is only 4%, so that a large amount of red mud can only be treated by a yard stacking method and occupies a large amount of land resources, and because the red mud contains a large amount of alkali, heavy metal and other potential pollutants, the red mud causes great harm to the land and directly or indirectly harms the health of people.
The glass products are widely used in industrial production and daily life, huge demand promotes the vigorous development of the glass industry, and a great amount of glass waste is generated, the amount of waste glass generated in China is about 1000 million tons each year, and accounts for about 5% of the total amount of solid waste, and the recycling of the waste glass is also huge problems due to different models produced by manufacturers
With the rapid development of the building industry, about 7500 million baked bricks (converted into standard bricks) are consumed in China every year, and if a large number of baked bricks are all prepared by clay, a large number of fertile farmlands can be damaged, so that the government of China repeatedly proposes that clay solid baked bricks are prohibited from being produced and used, and encourages to use various industrial waste residues for making bricks so as to protect the clay and arable land which is dependent on survival.
Disclosure of Invention
Aiming at the problem of low comprehensive utilization rate of red mud, the invention provides preparation methods for preparing sintered bricks by using red mud, wherein the method takes red mud and waste glass as main raw materials, greatly improves the comprehensive utilization rate of solid wastes, and in addition, the sintered bricks in the patent have the characteristics of fewer raw material types, simple preparation process and low cost.
The red mud baked brick and the preparation process comprise the following steps:
(1) carrying out high-temperature sintering pretreatment on the red mud, putting the red mud into a 400-plus-700 ℃ high-temperature furnace for heat preservation for 1-3h, and sieving the red mud by a 200-mesh sieve;
(2) the ingredients are as follows by mass percent: 50-90wt% of red mud, 6-50wt% of waste glass and 5-25wt% of binder. Stirring uniformly, and putting into a mould for compression molding;
(3) putting the green bricks into a drying furnace for drying treatment;
(4) and sintering the dried dry green bricks, and then cooling to room temperature to obtain the red mud sintered bricks.
In the red mud sintered brick preparation process, the red mud is Bayer process red mud or sintering process red mud.
In the red mud baked brick preparation process, the granularity of the untreated red mud particles is 1-5 mm.
In the red mud sintered brick preparation process, the granularity of the pretreated red mud is 200 meshes below the sieve.
In the red mud baked brick preparation process, the molding pressure in the step (2) is preferably 10-15MPa, and the preferred binder is 10-20%.
In the red mud baked brick preparation process, the drying temperature in the step (3) is preferably 60-100 ℃ for 1-2 days.
In the red mud sintered brick preparation process, the sintering temperature in the step (4) is preferably 900-1000 ℃.
The invention utilizes the red mud and the waste glass to prepare the high-strength red mud baked brick, the baked brick has two remarkable advantages of high strength and corrosion resistance , and the red mud is used as the aggregate, so that the red mud content in the red mud type baked brick reaches more than 80 percent, the red mud waste is fully used, the comprehensive utilization rate of the red mud is improved, and the pollution to the environment is reduced.
Drawings
FIG. 1 is a scanning electron microscope image of a section of a red mud baked brick obtained in the present patent.
Detailed Description
Example 1
Step 1: carrying out high-temperature sintering pretreatment on the red mud, putting the red mud into a high-temperature furnace at 600 ℃ for heat preservation for 1h, and sieving the red mud by a 200-mesh sieve;
step 2: the ingredients are as follows by mass percent: 72wt% of red mud, 8wt% of waste glass and 20wt% of binder. Stirring uniformly, and putting into a mould for compression molding;
and step 3: putting the green brick into a drying furnace at 60 ℃, and preserving heat for 24 hours;
and 4, step 4: and (3) putting the dried dry green bricks into a high-temperature furnace, heating the dried dry green bricks to 900 ℃ from room temperature (the heating rate is 5 ℃/min), then preserving the heat for 60min, and then naturally cooling the dried dry green bricks to the room temperature.
Example 2
Step 1: carrying out high-temperature sintering pretreatment on the red mud, putting the red mud into a 650 ℃ high-temperature furnace for heat preservation for 1h, and sieving the red mud by a 200-mesh sieve;
step 2: the ingredients are as follows by mass percent: 64wt% of red mud, 16wt% of waste glass and 20wt% of binder. Stirring uniformly, and putting into a mould for compression molding;
and step 3: putting the green brick into a drying furnace at 90 ℃, and preserving heat for 24 hours;
and 4, step 4: and (3) putting the dried dry green bricks into a high-temperature furnace, heating the dried dry green bricks to 950 ℃ from room temperature (the heating rate is 5 ℃/min), then preserving the heat for 70min, and then naturally cooling the dried dry green bricks to the room temperature.
Example 3
Step 1: carrying out high-temperature sintering pretreatment on the red mud, putting the red mud into a high-temperature furnace at 700 ℃ for heat preservation for 1h, and sieving the red mud by a 200-mesh sieve;
step 2: the ingredients are as follows by mass percent: 80wt% of red mud, 10wt% of waste glass and 10wt% of binder. Stirring uniformly, and putting into a mould for compression molding;
and step 3: putting the green brick into a drying furnace at 110 ℃, and preserving heat for 24 hours;
and 4, step 4: and (3) putting the dried dry green bricks into a high-temperature furnace, heating the dried dry green bricks to 1000 ℃ from room temperature (the heating rate is 5 ℃/min), then preserving the heat for 70min, and then naturally cooling the dried dry green bricks to the room temperature.
Example 4
Step 1: carrying out high-temperature sintering pretreatment on the red mud, putting the red mud into a high-temperature furnace at 600 ℃ for heat preservation for 1h, and sieving the red mud by a 200-mesh sieve;
step 2: the ingredients are as follows by mass percent: 75wt% of red mud, 15wt% of waste glass and 10wt% of binder. Stirring uniformly, and putting into a mould for compression molding;
and step 3: putting the green brick into a drying furnace at 60 ℃, and preserving heat for 24 hours;
and 4, step 4: and (3) putting the dried dry green bricks into a high-temperature furnace, heating the dried dry green bricks to 1050 ℃ from room temperature (heating rate: 5 ℃/min), then preserving the heat for 70min, and then naturally cooling the dried dry green bricks to the room temperature.
The above embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the scope of the present invention should be defined by the claims.
Claims (10)
1. The invention relates to red mud baked bricks, which are characterized in that the ingredients comprise, by mass, 50-90wt% of red mud, 6-50wt% of waste glass and 5-25wt% of a binder.
2. The red mud sintered brick as claimed in claim 1, wherein the red mud is subjected to a high temperature calcination pretreatment at 400-700 ℃ for 1-3 h.
3. The red mud sintered brick according to claim 1 to 2, wherein the red mud and the waste glass have a particle size of 200 meshes or less.
4. The red mud sintered brick as claimed in claim 1 to 3, wherein said binder is water, further steps being optimized to 10-20 wt%.
5. The red mud sintered brick as set forth in claims 1 to 4, wherein said waste glass is at least kinds of common plate glass, tempered glass, embossed glass and CRT glass.
6. The red mud sintered brick as claimed in claim 1 to 5, wherein the red mud is prepared by at least kinds selected from Bayer process, sintering process and mixed-series process.
7. The red mud baked brick as claimed in claims 1 to 6, wherein the raw materials are mixed in proportion, water is added to the mixture, the mixture is stirred uniformly, and the mixture is placed into a die for pressing, and the forming pressure is 5 to 30 MPa.
8. The red mud sintered brick as claimed in claims 1 to 7, wherein the drying treatment is carried out after press forming, the drying temperature is 60 to 100 ℃, and the drying time is 1 to 2 days.
9. The red mud sintered brick as claimed in claims 1-8, wherein the dried dry brick is sintered from room temperature to 850 ℃ and 1050 ℃, the heating rate is 5-10 ℃/min, and the sintering time is 10-70 min.
10. The red mud sintered brick according to claims 1 to 9, wherein said red mud sintered brick has the following properties: the density is 1.5-2.2g/cm3The compressive strength is 20-40MPa, the breaking strength is 7-13MPa, the material belongs to building materials, and the material can be practically applied to field bricks, road bricks and other aspects.
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112661490A (en) * | 2021-01-21 | 2021-04-16 | 山东理工大学 | Semi-internal combustion type red mud sintered brick and production process and application thereof |
CN114907134A (en) * | 2022-06-29 | 2022-08-16 | 平玉英 | Radiation energy-saving high-temperature refractory material for industrial kiln and preparation method thereof |
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JPS61178449A (en) * | 1985-02-04 | 1986-08-11 | 日本磁力選鉱株式会社 | Use of steel slag |
CN102173858A (en) * | 2011-01-10 | 2011-09-07 | 济南大学 | Red mud foaming lightweight heat-preserving plate |
CN103319150A (en) * | 2013-05-31 | 2013-09-25 | 贵州大学 | High-doping ratio red mud sintered brick and preparation method thereof |
CN107129276A (en) * | 2017-04-17 | 2017-09-05 | 山东利晟透水材料科技有限公司 | A kind of red mud permeable brick and preparation method thereof |
CN108101576A (en) * | 2018-01-19 | 2018-06-01 | 山东理工大学 | A kind of preparation method of red mud type water-permeable brick |
CN109553388A (en) * | 2018-12-27 | 2019-04-02 | 中铝山西新材料有限公司 | A kind of red mud base fireproof and heat-insulating material and preparation method thereof |
CN110304928A (en) * | 2018-03-20 | 2019-10-08 | 陈进 | A kind of sintered perforated brick prepared using waste red mud residues as raw material |
-
2019
- 2019-11-14 CN CN201911111135.4A patent/CN110734270A/en active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS61178449A (en) * | 1985-02-04 | 1986-08-11 | 日本磁力選鉱株式会社 | Use of steel slag |
CN102173858A (en) * | 2011-01-10 | 2011-09-07 | 济南大学 | Red mud foaming lightweight heat-preserving plate |
CN103319150A (en) * | 2013-05-31 | 2013-09-25 | 贵州大学 | High-doping ratio red mud sintered brick and preparation method thereof |
CN107129276A (en) * | 2017-04-17 | 2017-09-05 | 山东利晟透水材料科技有限公司 | A kind of red mud permeable brick and preparation method thereof |
CN108101576A (en) * | 2018-01-19 | 2018-06-01 | 山东理工大学 | A kind of preparation method of red mud type water-permeable brick |
CN110304928A (en) * | 2018-03-20 | 2019-10-08 | 陈进 | A kind of sintered perforated brick prepared using waste red mud residues as raw material |
CN109553388A (en) * | 2018-12-27 | 2019-04-02 | 中铝山西新材料有限公司 | A kind of red mud base fireproof and heat-insulating material and preparation method thereof |
Non-Patent Citations (1)
Title |
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中国硅酸盐学会房屋建筑材料分会主编: "《房建材料与绿色建筑》", 31 August 2009, 中国建材工业出版社 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112661490A (en) * | 2021-01-21 | 2021-04-16 | 山东理工大学 | Semi-internal combustion type red mud sintered brick and production process and application thereof |
CN114907134A (en) * | 2022-06-29 | 2022-08-16 | 平玉英 | Radiation energy-saving high-temperature refractory material for industrial kiln and preparation method thereof |
CN114907134B (en) * | 2022-06-29 | 2023-08-22 | 平玉英 | Industrial kiln radiation energy-saving type high-temperature refractory material and preparation method thereof |
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Application publication date: 20200131 |