CN107663100B - Water permeable brick prepared by melting blast furnace slag and preparation method thereof - Google Patents
Water permeable brick prepared by melting blast furnace slag and preparation method thereof Download PDFInfo
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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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
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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
- C04B33/131—Inorganic additives
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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
- C04B33/138—Waste materials; Refuse; Residues from metallurgical processes, e.g. slag, furnace dust, galvanic waste
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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
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00284—Materials permeable to liquids
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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
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3208—Calcium oxide or oxide-forming salts thereof, e.g. lime
- C04B2235/321—Dolomites, i.e. mixed calcium magnesium carbonates
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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
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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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- General Chemical & Material Sciences (AREA)
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- Curing Cements, Concrete, And Artificial Stone (AREA)
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Abstract
The invention provides a water permeable brick prepared by utilizing molten blast furnace slag and a preparation method thereof, wherein the water permeable brick is prepared from the following raw materials in parts by weight: melting the blast furnace slag: 70-85 parts of a solvent; cement: 5-10 parts; dolomite: 10-20 parts. The invention directly utilizes the molten blast furnace slag to prepare the water permeable brick, and fully utilizes the molten blast furnace slag, thereby not only providing a new way for treating the molten blast furnace slag, but also saving a large amount of cooling water and efficiently and fully utilizing the sensible heat energy of the molten slag because the molten blast furnace slag is not subjected to a water quenching treatment process. Meanwhile, in the process of preparing the water permeable brick, additional heating and sintering are not needed, and fuel is saved. Compared with the traditional process for manufacturing the water permeable brick, the invention greatly reduces the production energy consumption.
Description
Technical Field
The invention relates to the field of blast furnace slag treatment, in particular to a water permeable brick prepared by melting blast furnace slag and a preparation method thereof.
Background
Blast furnace slag is a metallurgical waste slag discharged from an iron-making blast furnace in the ferrous metallurgy process, is one of main solid wastes discharged from steel plants, and is also one of industrial waste slag with larger current discharge capacity in China.
The conventional method for treating molten blast furnace slag by a large-scale blast furnace is an INBA method, wherein the molten blast furnace slag enters a molten slag granulation area through a slag runner, is quenched and granulated and cooled by high-speed water flow sprayed from a water slag flushing box, and then is conveyed out by a belt after a slag-water mixture is dehydrated by a rotary drum. Because the molten blast furnace slag is directly quenched by water, the problems of easy explosion and serious pollution exist in the treatment process, the environment of a factory is difficult to control, the whole device comprises a slag pool, the occupied area is large, and the added value of the grain slag product is low. Meanwhile, the method not only needs a large amount of cooling water, but also is difficult to recycle the heat carried by the blast furnace slag, thereby causing huge energy waste. Although there are many methods for recycling molten blast furnace slag at home and abroad, the recycling treatment method for the molten blast furnace slag with high energy utilization rate is fresh in steel plants due to the reasons that the blast furnace slag has poor fluidity below 1300 ℃, a heat exchanger is difficult to bear high temperature for a long time or can bear high temperature but has poor heat exchange effect and the like.
In the prior art, a method for manufacturing the water permeable brick by using water-quenched normal-temperature blast furnace slag is adopted, but the water permeable brick is obtained by mixing the normal-temperature blast furnace slag with auxiliary materials and then firing the mixture at a high temperature, and a large amount of fuel is needed. The invention patent application with publication number CN106220219A discloses an environment-friendly water permeable brick prepared by using blast furnace slag and sludge as main materials and a preparation method thereof, but the cooled blast furnace slag is used as a raw material, the heat of the molten blast furnace slag is not utilized, the sintering temperature is 1050-1150 ℃ in the process of manufacturing the water permeable brick, and huge fuel is consumed in the firing process, so that energy waste is caused.
How to utilize the physical heat of the molten blast furnace slag to produce products with higher added values at the maximum efficiency is a problem which needs to be solved urgently at present.
Disclosure of Invention
The invention aims to provide a water permeable brick prepared by utilizing molten blast furnace slag, which not only can utilize the molten blast furnace slag to produce the water permeable brick, but also fully utilizes the waste heat of the molten blast furnace slag.
In order to achieve the purpose, the invention provides a water permeable brick prepared by melting blast furnace slag, which is characterized in that: the material is prepared from the following raw materials in parts by weight:
melting the blast furnace slag: 70-85 parts of a solvent;
cement: 5-10 parts;
dolomite: 10-20 parts.
In the invention, the molten blast furnace slag is used as a framework, cement is used as a binder, and dolomite is decomposed at high temperature to generate CO2Therefore, the porosity of the water permeable brick can be improved by utilizing the characteristic that the dolomite generates carbon dioxide by pyrolysis, and the water permeable brick can be further improvedThe water permeability of the water permeable brick is improved, and the overall performance of the water permeable brick is improved.
Preferably, the molten blast furnace slag is blast furnace slag with the temperature of 1500-1550 ℃.
The molten blast furnace slag at the temperature has better fluidity, and the residual heat of the molten blast furnace slag can be utilized to reduce the fuel required by heating.
Preferably, the binary alkalinity of the molten blast furnace slag is 1.05-1.20.
The binary alkalinity is CaO (mass percent) and SiO in the blast furnace slag2(mass percentage).
Preferably, the dolomite has a particle size of 200 to 400 meshes.
Preferably, the specific surface area of the cement is 350m2/kg～400m2/kg。
All technical requirements of the cement meet the standard requirements of GB175 general Portland cement, and the bonding effect can be better realized. The dolomite and the cement can be better mixed with the blast furnace slag under the preferable conditions.
Another object of the present invention is to provide a method for preparing the above water permeable brick, which has simple steps and low cost, and makes full use of the molten blast furnace slag.
In order to achieve the purpose, the invention provides a preparation method of the water permeable brick, which comprises the following steps:
1) mixing the molten blast furnace slag, cement and dolomite at the temperature of 1500-1550 ℃, and then uniformly stirring at the temperature of 1450-1500 ℃;
2) after stirring, rolling and cooling to form a surface-cured plate with the surface temperature of 1100-1200 ℃;
3) and annealing, insulating and cooling the plate obtained by rolling and forming to obtain the water permeable brick.
And after the cooled plate is cut to length, polishing, slitting and trimming are carried out according to the specification requirement of the product, and the finished water permeable brick can be formed.
Preferably, in the step 1), the molten blast furnace slag is added into a stirring container at a flow rate of 15-35 t/h and a flow speed of 2.0-3.5 m/s, and then cement and dolomite are added and mixed uniformly.
Preferably, in the step 1), the stirring speed is 5-10 r/min, and the stirring time is 0.5-1 h.
The uneven mixing can be caused by the over-slow stirring speed and the over-short stirring time, and the CO generated by the dolomite can be caused by the over-fast stirring speed and the over-long stirring time2Excessive escape is not beneficial to the formation of multiple holes in the water permeable brick.
Preferably, in the step 1), the molten blast furnace slag with the temperature of 1500-1550 ℃ is obtained by the following steps:
heating the molten blast furnace slag produced by a blast furnace at 1450-1550 ℃ to 1500-1600 ℃ for storage;
the molten blast furnace slag with the temperature of 1500-1600 ℃ is adjusted to the temperature of 1500-1550 ℃ and the pressure of 2-5 standard atmospheric pressures, and then the molten blast furnace slag is added into a stirring container.
Preferably, in the step 3), the processes of annealing, heat preservation and re-cooling are as follows: annealing and heat-preserving treatment is carried out on the plate obtained by rolling forming at 950 ℃ for 5-10 min, then the plate is cooled to 600 ℃ for annealing and heat-preserving treatment for 5-10 min, then the plate is cooled to 350 ℃ at the cooling rate of 20-30 ℃/min, and finally the plate is rapidly cooled to the temperature of 60-70 ℃.
The invention has the beneficial effects that:
the invention directly utilizes the molten blast furnace slag to prepare the water permeable brick, and fully utilizes the molten blast furnace slag, thereby not only providing a new way for treating the molten blast furnace slag, but also saving a large amount of cooling water and efficiently and fully utilizing the sensible heat energy of the molten slag because the molten blast furnace slag is not subjected to a water quenching treatment process. Meanwhile, in the process of preparing the water permeable brick, additional heating and sintering are not needed, and fuel is saved. Compared with the traditional process for manufacturing the water permeable brick, the invention greatly reduces the production energy consumption.
Detailed Description
The water permeable brick prepared by melting blast furnace slag and the preparation method thereof according to the present invention will be further described by the following specific examples:
directly injecting the high-temperature molten blast furnace slag produced by the blast furnace into a slag storage device through a slag runner or a slag pot in front of the blast furnace, wherein the temperature of the blast furnace slag is controlled to be 1450-1550 ℃ and the binary alkalinity of the blast furnace slag is controlled to be 1.05-1.20 in order to ensure that the blast furnace slag has good fluidity. Wherein the binary alkalinity is CaO (mass percent) and SiO in the blast furnace slag2(mass percent) ratio.
Because the molten blast furnace slag has heat loss in the storage process, the storage temperature is controlled to be 1500-1600 ℃ by the slag storage device capable of adjusting the temperature.
Then the molten blast furnace slag is conveyed into a liquid supply device through a conveying pipeline by a slag storage device. In order to improve the flow speed of the molten blast furnace slag in the subsequent process, accurately and controllably control the flow and prevent the phenomenon of uncontrollable flow caused by over-slow flow speed, the temperature of the molten blast furnace slag in the liquid supply device is controlled to be 1500-1550 ℃, and the pressure is controlled to be 2-5 standard atmospheric pressures.
Then injecting the molten blast furnace slag in the liquid supply device into a stirrer at the flow rate of 15-35 t/h and the flow speed of 2.0-3.5 m/s, and uniformly adding the molten blast furnace slag with the specific surface area of 350m above the stirrer2/kg～400m2The cement per kg and the dolomite with the granularity of 200 meshes to 400 meshes are uniformly stirred together. And various technical requirements of the cement meet the standard requirements of GB175 universal Portland cement, so that the dolomite and the cement are as uniform as possible in the molten blast furnace slag during stirring. Among them, in order to make the molten blast furnace slag more controllable, the molten blast furnace slag may be conveyed at a high flow rate and a small flow rate.
Wherein the temperature in the stirrer is controlled to be 1450-1500 ℃, the stirring speed is 5-10 revolutions per minute, and the stirring time is 0.5-1 h. Wherein the slow speed and short time result in non-uniform mixing, whereas the CO produced by dolomite2The excessive overflow is not beneficial to the formation of multiple holes in the brick. The molten blast furnace slag entering the stirrer is converted into mass according to flow and flow rate, the molten blast furnace slag in the stirrer is controlled to be 70-85 parts by weight, the cement is 5-10 parts by weight, and the dolomite is 10-20 parts by weight.
And then the mixture from the stirrer enters a calender for molding, and a surface curing plate with the surface temperature of 1100-1200 ℃ is formed by calendering and cooling.
And then annealing and stress relieving the plate obtained by calendering and forming in an annealing furnace, annealing and heat preservation treatment at 950 ℃ for 5-10 min, annealing and heat preservation treatment at 600 ℃ for 5-10 min, wherein the cooling rate is 20-30 ℃/min when the temperature is 600-350 ℃, then rapidly cooling, and the temperature of the plate taken out of the annealing furnace is 60-70 ℃.
And finally, cutting the plate out of the annealing furnace to a fixed length, and polishing, cutting and trimming according to the specification requirement of the product to form the finished product of the water permeable brick.
Example 1:
injecting molten blast furnace slag produced by a blast furnace of Wu Steel No. 7 into a slag storage device through a slag runner in front of the blast furnace, wherein the temperature of the slag produced by the blast furnace is 1530 ℃, the binary alkalinity of the slag is controlled at 1.05, and the temperature of molten slag in the slag storage device is controlled at 1550 ℃;
the slag enters a liquid supply device from a slag storage device through a conveying pipeline, the temperature of the slag in the liquid supply device is controlled to be 1500 ℃, and the pressure is 2 standard atmospheric pressures.
Controlling the flow of the slag liquid in the liquid supply device to be 15-35 t/h and the flow speed of 2.0m/s, injecting the slag liquid into a stirrer through a pipeline, uniformly adding cement and dolomite above the stirrer, wherein the granularity of the dolomite is 300 meshes, and the specific surface area of the cement is 400m2The temperature of the stirrer is controlled to be 1500 ℃, the stirring speed is 5 revolutions per minute, the stirring time is 0.5 hour, the quality of the slag in the stirrer is controlled to be 85 parts, the cement is 5 parts, and the dolomite is 10 parts.
The mixed slag from the stirrer enters a calender for molding, and a surface-solidified plate with the surface temperature of 1100 ℃ is formed by calendering and cooling;
annealing and stress relieving are carried out on the plate obtained by calendaring and forming in an annealing furnace, annealing and heat preservation treatment is carried out for 10min at 950 ℃, after cooling for a period of time, annealing and heat preservation treatment is carried out for 6min at 600 ℃, the cooling rate is 25 ℃/min from 600 ℃ to 350 ℃, then rapid cooling is carried out, and the temperature of the plate taken out of the annealing furnace is 65 ℃.
And after the plate taken out of the annealing furnace is cut to length, polishing, slitting and trimming are carried out according to the specification requirement of the product to form the finished product of the water permeable brick.
Example 2:
injecting molten slag produced by a blast furnace of Wu Steel No. 6 into a slag storage device through a slag runner in front of the blast furnace, wherein the temperature of the slag produced by the blast furnace is 1450 ℃, the binary alkalinity of the slag is controlled at 1.18, and the temperature of the molten slag in the slag storage device is controlled at 1550 ℃;
the slag enters a liquid supply device from a slag storage device through a conveying pipeline, the temperature of the slag in the liquid supply device is controlled to 1530 ℃, and the pressure is 2.5 standard atmospheric pressures.
Controlling the flow of the slag liquid in the liquid supply device to be 15-35 t/h and the flow speed of 3.5m/s, injecting the slag liquid into a stirrer through a pipeline, uniformly adding cement and dolomite above the stirrer, wherein the granularity of the dolomite is 200 meshes, and the specific surface area of the cement is 350m2The temperature of the stirrer is controlled to 1450 ℃, the stirring speed is 7 revolutions per minute, the stirring time is 1 hour, the quality of the slag in the stirrer is controlled to 80 parts, the cement is 8 parts, and the dolomite is 12 parts.
The mixed slag from the stirrer enters a calender for molding, and a surface-solidified plate with the surface temperature of 1200 ℃ is formed through calendering and cooling;
annealing and stress relieving are carried out on the plate obtained by calendaring and forming in an annealing furnace, annealing and heat preservation treatment is carried out for 6min at 950 ℃, after cooling for a period of time, annealing and heat preservation treatment is carried out for 5min at 600 ℃, the cooling rate is 30 ℃/min when the temperature is 600-350 ℃, then the plate is rapidly cooled, and the temperature of the plate taken out of the annealing furnace is 60 ℃.
And after the plate taken out of the annealing furnace is cut to length, polishing, slitting and trimming are carried out according to the specification requirement of the product to form the finished product of the water permeable brick.
Example 3:
injecting molten slag produced by a Wu steel No. 8 blast furnace into a slag storage device through a slag runner in front of the blast furnace, wherein the temperature of the slag produced by the blast furnace is 1550 ℃, the binary alkalinity of the slag is controlled at 1.20, and the temperature of the molten slag in the slag storage device is controlled at 1600 ℃;
the slag enters a liquid supply device from a slag storage device through a conveying pipeline, the temperature of the slag in the liquid supply device is controlled to be 1550 ℃, and the pressure is 5 standard atmospheric pressures.
Controlling the flow of the slag liquid in the liquid supply device to be 15-35 t/h and the flow speed of 3.0m/s, injecting the slag liquid into a stirrer through a pipeline, and uniformly adding the slag liquid above the stirrerCement and dolomite, the granularity of the dolomite is 400 meshes, and the specific surface area of the cement is 380m2The temperature of the stirrer is controlled to be 1480 ℃, the stirring speed is 10 revolutions per minute, the stirring time is 35min, the quality of the slag in the stirrer is controlled to be 70 parts, the cement is 10 parts, and the dolomite is 20 parts.
The mixed slag from the stirrer enters a calender for molding, and a surface-solidified plate with the surface temperature of 1180 ℃ is formed through calendering and cooling;
annealing and stress relieving are carried out on the plate obtained by calendaring and forming in an annealing furnace, annealing and heat preservation treatment is carried out for 5min at 950 ℃, after cooling for a period of time, annealing and heat preservation treatment is carried out for 10min at 600 ℃, the cooling rate is 20 ℃/min from 600 ℃ to 350 ℃, then rapid cooling is carried out, and the temperature of the plate taken out of the annealing furnace is 70 ℃.
And after the plate taken out of the annealing furnace is cut to length, polishing, slitting and trimming are carried out according to the specification requirement of the product to form the finished product of the water permeable brick.
The water permeability, frost resistance loss rate, pit length and breaking strength of the water permeable bricks obtained in examples 1 to 3 were tested and compared with the labeling of the national standard GB/T25993-2010 water permeable pavement bricks and water permeable pavement slabs, with the results shown in table 1:
TABLE 1 comparison of the Properties of the Water permeable bricks obtained in examples 1 to 3 with the national standards
| Flexural strength (MPa) | Water permeability (cm/s) | Percent loss of Frost Strength (%) | Pit length (mm) | |
| National standard | ≥3.0 | ≥0.01 | ≤20 | ≤35 |
| Example 1 | 3.3 | 0.017 | 18 | 30 |
| Example 2 | 3.1 | 0.015 | 16 | 33 |
| Example 3 | 3.5 | 0.021 | 15 | 31 |
As can be seen from Table 1, the water permeable brick prepared by melting the blast furnace slag has various indexes meeting the national standard, and can replace the commercially available water permeable brick. Therefore, the invention not only can treat the blast furnace slag, but also effectively utilizes the heat energy of the molten blast furnace slag, and can obtain the water permeable brick with economic benefit, thereby having remarkable effect.
Since modifications and variations in the above-described and other embodiments of the invention may occur to persons skilled in the art, it is not intended to limit the invention to the precise form or embodiments disclosed.
Claims (5)
1. A method for preparing a water permeable brick by utilizing molten blast furnace slag is characterized by comprising the following steps: the method comprises the following steps:
1) mixing the molten blast furnace slag, cement and dolomite at the temperature of 1500-1550 ℃, and then uniformly stirring at the temperature of 1450-1500 ℃;
2) after stirring, rolling and cooling to form a surface-cured plate with the surface temperature of 1100-1200 ℃;
3) annealing and insulating the plate obtained by rolling and forming at 950 ℃ for 5-10 min, then cooling to 600 ℃, annealing and insulating for 5-10 min, then cooling to 350 ℃ at a cooling rate of 20-30 ℃/min, and finally rapidly cooling to the temperature of 60-70 ℃;
the permeable brick comprises the following raw materials in parts by weight:
melting the blast furnace slag: 70-85 parts of molten blast furnace slag, wherein the binary alkalinity of the molten blast furnace slag is 1.05-1.20;
cement: 5-10 parts of cement, wherein the specific surface area of the cement is 350m2/kg～400m2/kg；
Dolomite: 10-20 parts of dolomite, wherein the granularity of the dolomite is 200-400 meshes.
2. The method for manufacturing water permeable bricks using molten blast furnace slag according to claim 1, wherein:
in the step 1), the molten blast furnace slag is added into a stirring container at a flow rate of 15-35 t/h and a flow speed of 2.0-3.5 m/s, and then cement and dolomite are added and mixed uniformly.
3. The method for manufacturing water permeable bricks using molten blast furnace slag according to claim 1, wherein:
in the step 1), the stirring speed is 5-10 r/min, and the stirring time is 0.5-1 h.
4. The method for manufacturing water permeable bricks using molten blast furnace slag according to claim 1, wherein:
in the step 1), the molten blast furnace slag with the temperature of 1500-1550 ℃ is obtained by the following steps:
heating the molten blast furnace slag produced by a blast furnace at 1450-1550 ℃ to 1500-1600 ℃ for storage;
the molten blast furnace slag with the temperature of 1500-1600 ℃ is adjusted to the temperature of 1500-1550 ℃ and the pressure of 2-5 standard atmospheric pressures, and then the molten blast furnace slag is added into a stirring container.
5. A water permeable brick prepared by utilizing molten blast furnace slag is characterized in that: the water permeable brick is prepared by the method of any one of claims 1 to 4.
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| JP2000313642A (en) * | 1999-04-23 | 2000-11-14 | Nippon Steel Corp | Production of rigid water-granulated slag |
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|---|---|---|---|---|
| CN102515602A (en) * | 2011-12-01 | 2012-06-27 | 刘光火 | Processing technology enabling high temperature cinder to directly form cinder bricks |
| CN104313211A (en) * | 2014-10-29 | 2015-01-28 | 唐山国丰钢铁有限公司 | Method for directly producing building brick by fusing blast furnace slags |
| CN106220219A (en) * | 2016-07-27 | 2016-12-14 | 北京大学 | With environment friendly pervious brick that blast furnace slag and mud are prepared for major ingredient and preparation method thereof |
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| CN107663100A (en) | 2018-02-06 |
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