CN112898042A - Steel slag ceramsite and preparation method and application thereof - Google Patents
Steel slag ceramsite and preparation method and application thereof Download PDFInfo
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- CN112898042A CN112898042A CN202110325117.7A CN202110325117A CN112898042A CN 112898042 A CN112898042 A CN 112898042A CN 202110325117 A CN202110325117 A CN 202110325117A CN 112898042 A CN112898042 A CN 112898042A
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- steel slag
- ceramsite
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- slag ceramsite
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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
- C04B38/009—Porous or hollow ceramic granular materials, e.g. microballoons
-
- 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
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
- C04B18/023—Fired or melted materials
-
- 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
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
- C04B18/027—Lightweight materials
-
- 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
-
- 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
-
- 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
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3418—Silicon oxide, silicic acids, or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
-
- 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
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/349—Clays, e.g. bentonites, smectites such as montmorillonite, vermiculites or kaolines, e.g. illite, talc or sepiolite
-
- 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)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Dispersion Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention belongs to the technical field of solid waste recycling, and particularly relates to a steel slag ceramsite and a preparation method and application thereof. The invention provides steel slag ceramsite which comprises the following components in parts by weight: 50-60 parts of steel slag; 20-30 parts of clay; 15-20 parts of water glass. The steel slag ceramsite provided by the invention takes the clay as a solid binding agent and the water glass as a liquid binding agent, so that the plasticity of the steel slag is enhanced together, the binding capacity between the steel slag and the steel slag is enhanced, the strength of the steel slag ceramsite is improved, when the steel slag ceramsite is used as a building material aggregate, the strength performance of a building material can be obviously improved, the problem of environmental pollution caused by steel slag stacking is effectively solved, the use of a stone raw material for building is reduced, and the dual purposes of solid waste recycling, energy conservation and environmental protection are realized.
Description
Technical Field
The invention belongs to the technical field of solid waste recycling, and particularly relates to a steel slag ceramsite and a preparation method and application thereof.
Background
Steel slag is a solid waste discharged from steel mills when smelting crude steel. The steel slag comprises the following main chemical components: CaO, MgO, SiO2、FeO、Fe2O3、MnO、Al2O3、TiO2、P2O5Etc., the main mineral composition of which is dicalcium silicateTricalcium silicate, calcium forsterite, calcium magnesium multiflower hectorite, calcium ferrite, alkoxy compounds and the like.
The domestic demand of steel is further increased, and the discharge amount of the steel slag is increased. The piling up of the steel slag occupies the land, and the volatilization and infiltration of the chemical substances in the steel slag pollute the surrounding air and rivers. The reasonable utilization of the steel slag can change waste into valuable and protect the environment, so the resource utilization of the steel slag has great significance.
Chinese patent CN101423362B discloses that steel slag polymer cement mortar prepared from steel slag, cement and reinforcing additive still needs to be additionally added with reinforcing agent to meet the requirement of use strength.
Disclosure of Invention
In view of the above, the steel slag ceramsite provided by the invention has the strength of 26.2-30.6 MPa, and when the steel slag ceramsite is used as a building material aggregate, the strength performance of the building material can be obviously improved, no reinforcing agent is required to be additionally added, the problem of environmental pollution caused by steel slag stacking is effectively solved, the use of a stone raw material for building is reduced, and the dual purposes of solid waste recycling, energy conservation and environmental protection are realized.
The invention provides steel slag ceramsite which comprises the following components in parts by weight:
50-60 parts of steel slag;
20-30 parts of clay;
15-20 parts of water glass.
Preferably, the particle size of the steel slag ceramsite is 5-15 mm.
Preferably, the grain size of the steel slag is less than or equal to 0.15 mm.
Preferably, the modulus of the water glass is 1.5-2.5.
The invention provides a preparation method of the steel slag ceramsite in the technical scheme, which comprises the following steps:
mixing, balling and calcining the steel slag, the clay and the water glass in sequence;
the calcining comprises: and sequentially carrying out low-temperature calcination and high-temperature calcination.
Preferably, the balling time is 20-30 min, the balling is carried out in a balling disc, the rotating speed of the balling disc is 20-40r/min, and the inclination angle of the balling disc is 35-55 degrees.
Preferably, the low-temperature calcination temperature is 500-700 ℃; the heat preservation time is 20-50 min.
Preferably, the high-temperature calcination temperature is 1100-1150 ℃, and the heat preservation time is 30-60 min.
Preferably, the material balls obtained by balling are maintained, the maintaining temperature is 5-30 ℃, the maintaining time is 12-24 hours, and the maintaining humidity is 50-70%.
The invention provides application of the steel slag ceramsite prepared by the technical scheme or the steel slag ceramsite prepared by the preparation method in the technical scheme as a building material aggregate.
The invention provides steel slag ceramsite which comprises the following components in parts by weight: 50-60 parts of steel slag; 20-30 parts of clay; 15-20 parts of water glass. The steel slag ceramsite provided by the invention takes the clay as a solid binding agent and the water glass as a liquid binding agent, so that the plasticity of the steel slag is enhanced together, the binding capacity between the steel slag and the steel slag is enhanced, the strength of the steel slag ceramsite is improved, when the steel slag ceramsite is used as a building material aggregate, the strength performance of the building material can be obviously improved, the problem of environmental pollution caused by steel slag stacking is effectively solved, the use of a stone raw material for building is reduced, and the dual purposes of solid waste recycling, energy conservation and environmental protection are realized. The results of the examples show that the strength of the steel slag ceramsite provided by the invention is 26.2-30.6 MPa.
Detailed Description
The invention provides steel slag ceramsite which comprises the following components in parts by weight:
50-60 parts of steel slag;
20-30 parts of clay;
15-20 parts of water glass.
The steel slag ceramsite provided by the invention comprises 50-60 parts of steel slag, preferably 53.5-56 parts of steel slag, wherein the particle size of the steel slag is preferably less than or equal to 0.15mm, and more preferably less than or equal to 0.1 mm; in the invention, the steel slag is solid waste discharged when a steel mill smelts crude steel, and the invention has no special requirement on the specific source of the steel slag.
The invention preferably performs pretreatment on solid waste discharged by a steel mill, in the invention, the pretreatment preferably comprises crushing and grinding, the invention has no special requirements on the specific implementation process of the crushing and grinding, and the invention ensures that the particle size of the steel slag meets the requirements of the invention through crushing and grinding.
According to the invention, the steel slag ceramsite is prepared by taking the steel slag as a main raw material, and when the steel slag ceramsite is used as an aggregate component of a building material, the strength of the steel slag ceramsite obtained in the embodiment is 26.2-30.6 MPa, so that the problem of environmental pollution caused by stacking of the steel slag is effectively solved, the use of the stone raw material for building is reduced, and the dual purposes of solid waste recycling, energy conservation and environmental protection are realized.
The steel slag ceramsite provided by the invention comprises 20-30 parts of clay, preferably 25-28.5 parts, by taking steel slag as a reference, and the source of the clay has no special requirement, and the steel slag ceramsite can be obtained by adopting a commercially available product well known by the technical personnel in the field.
The invention takes clay as the solid adhesive of the steel slag ceramsite to enhance the plasticity of the steel slag.
Based on the steel slag, the steel slag ceramsite provided by the invention comprises 15-20 parts of clay, preferably 16.5-18 parts. In the invention, the particle size of the clay is preferably 1-10 mm.
Based on steel slag, the steel slag ceramsite provided by the invention comprises 15-20 parts of water glass, preferably 17-19 parts; in the invention, the modulus of the water glass is preferably 1.5-2.5; the source of the water glass is not particularly required in the present invention, and a commercially available product well known to those skilled in the art may be used.
The invention takes the water glass as the liquid binder of the steel slag ceramsite to enhance the plasticity of the steel slag.
In the invention, the grain size of the steel slag ceramsite is preferably 5-15 mm, and more preferably 7-12 mm.
The invention provides a preparation method of the steel slag ceramsite in the technical scheme, which comprises the following steps:
mixing, balling and calcining the steel slag, the clay and the water glass in sequence;
the calcining comprises low-temperature calcining and high-temperature calcining which are sequentially carried out.
Mixing steel slag, clay and water glass; in the present invention, the mixing preferably comprises the steps of:
carrying out first mixing on the steel slag and clay to obtain a first mixed material;
and carrying out second mixing on the first mixed material and the water glass to obtain a second mixed material.
The steel slag and clay are subjected to first mixing to obtain a first mixed material; in the invention, the first mixing is preferably carried out under the condition of stirring, the mixing speed is preferably 25-35 r/min, and the invention has no special requirements on the specific implementation process of the stirring.
After the first mixed material is obtained, carrying out second mixing on the first mixed material and water glass to obtain a second mixed material; in the invention, water is preferably added into the second mixing, the second mixing material is easier to ball by adding water, and the adding amount of the water has no special requirement so that the second mixing material can be successfully ball; in the present invention, the second mixing is preferably carried out in a balling disk.
After the second mixed material is obtained, the second mixed material is pelletized to obtain a calcined precursor. In the invention, the balling time is preferably 20-30 min; in the invention, the balling is preferably carried out in a balling disc, the rotating speed of the balling disc is preferably 20-40r/min, and the inclination angle of the balling disc is preferably 35-55 degrees, and more preferably 40-45 degrees.
After the balling is finished, the balling is preferably carried out, the material balls obtained through the balling are preferably maintained, and in the invention, the maintaining temperature is preferably 5-30 ℃, and more preferably 10-25 ℃; the curing time is preferably 12-24 hours, and the curing humidity is preferably 50-70%, and more preferably 55-65%; in the invention, the curing is preferably carried out in a curing chamber, and the bonding force among the steel slag, the clay and the water glass can be further enhanced through the curing.
After curing is finished, the material balls cured by the material balls are preferably dried to obtain a calcined precursor, wherein the drying temperature is preferably 80-120 ℃, and more preferably 90-100 ℃; the drying time is preferably 1-4 h, and more preferably 2-3 h; in the present invention, the drying is preferably performed in a drying oven.
After the calcination precursor is obtained, the calcination precursor is calcined to obtain the steel slag ceramsite. In the invention, the calcination comprises low-temperature calcination and high-temperature calcination sequentially; in the invention, the temperature of the low-temperature calcination is preferably 500-700 ℃; the heat preservation time is preferably 20-50 min, and more preferably 30-40 min; the high-temperature calcination temperature is preferably 1100-1150 ℃, and the heat preservation time is preferably 30-60 min, and more preferably 35-50 min. The rate of raising the temperature to the calcination temperature is not particularly limited in the present invention.
The invention divides the calcination into two steps to be more beneficial to obtaining the steel slag ceramsite with complete structure and no fine cracks on the surface.
The invention provides application of the steel slag ceramsite prepared by the technical scheme or the steel slag ceramsite prepared by the preparation method in the technical scheme as a building material aggregate.
In the invention, the steel slag ceramsite is used as aggregate of building materials and is used for preparing ceramsite concrete.
In the invention, the ceramsite concrete preferably comprises cement, sand and steel slag ceramsite, and the cement and the sand have no special requirements.
In order to further illustrate the present invention, the following embodiments are described in detail, but they should not be construed as limiting the scope of the present invention.
Example 1
Carrying out first mixing on 55 parts of steel slag and 25 parts of clay under the stirring condition of 25r/min to obtain a first mixed material; putting the first mixed material into a balling disk, adding 20 parts of water glass with the modulus of 1.5 and 5 parts of water, rotating the balling disk to ball the materials for 30min, wherein the rotating speed of the balling disk is 40r/min, and the inclination angle of the balling disk is 35 degrees to obtain material balls; and (3) placing the pellets into a curing chamber for curing at 5 ℃ for 24h and at 50% humidity, drying in a drying oven for 2h at 80 ℃ to obtain calcined precursor pellets, keeping the temperature of the calcined precursor pellets at 600 ℃ for 30min for low-temperature calcination, and keeping the temperature at 1120 ℃ for 60min for high-temperature calcination to obtain the steel slag ceramsite.
According to the ceramsite test performance standard: GB/17431-1998, the performance test of the products of the examples shows that the strength of the steel slag ceramsite obtained in the example is 30.6 MPa.
Examples 2 to 4
The steel slag ceramsite obtained in example 2 to example 4 were prepared according to the method of example 1, except that the strength of the steel slag ceramsite is shown in Table 1.
TABLE 1 formulations and methods and product Properties of examples 1-4
As shown in Table 1, the steel slag ceramsite provided by the invention has the strength of 26.2-30.6 MPa, and can be used as a building material aggregate, so that the strength performance of the building material can be obviously improved, the problem of environmental pollution caused by stacking of steel slag is effectively solved, the use of stone raw materials for construction is reduced, and the dual purposes of solid waste recycling, energy conservation and environmental protection are realized. The results of the examples show that the steel slag ceramsite provided by the invention.
Application example 1
Mixing cement, sand, steel slag ceramsite and water according to the mass ratio of the cement to the sand to the steel slag ceramsite of 1:2.09:2.09, wherein the water-cement ratio is 0.47, curing the obtained ceramsite concrete containing the steel slag ceramsite at room temperature for 10 days, and measuring that the strength of the ceramsite concrete can reach 30 MPa.
Although the present invention has been described in detail with reference to the above embodiments, it is only a part of the embodiments of the present invention, not all of the embodiments, and other embodiments can be obtained without inventive step according to the embodiments, and the embodiments are within the scope of the present invention.
Claims (10)
1. The steel slag ceramsite is characterized by comprising the following components in parts by weight:
50-60 parts of steel slag;
20-30 parts of clay;
15-20 parts of water glass.
2. The steel slag ceramsite of claim 1, wherein the steel slag ceramsite has a particle size of 5-15 mm.
3. The steel slag ceramsite of claim 1 or 2, wherein the steel slag has a particle size of 0.15mm or less.
4. The steel slag ceramsite of claim 1, wherein the water glass has a modulus of 1.5-2.5.
5. The preparation method of the steel slag ceramsite as set forth in any one of claims 1 to 4, which is characterized by comprising the following steps:
mixing, balling and calcining the steel slag, the clay and the water glass in sequence to obtain steel slag ceramsite;
the calcining comprises: and sequentially carrying out low-temperature calcination and high-temperature calcination.
6. The preparation method according to claim 5, wherein the balling time is 20-30 min, the balling is carried out in a balling disc, the rotating speed of the balling disc is 20-40r/min, and the inclination angle of the balling disc is 35-55 degrees.
7. The preparation method according to claim 5, wherein the temperature of the low-temperature calcination is 500 to 700 ℃; the heat preservation time is 20-50 min.
8. The preparation method according to claim 5 or 7, wherein the high-temperature calcination is carried out at 1100-1150 ℃ for 30-60 min.
9. The method of claim 5, further comprising, prior to the calcining: and curing the material balls obtained by balling, wherein the curing temperature is 5-30 ℃, the curing time is 12-24 h, and the curing humidity is 50-70%.
10. Use of the steel slag ceramsite according to any one of claims 1 to 4 or the steel slag ceramsite obtained by the preparation method according to any one of claims 5 to 9 as an aggregate of a building material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110325117.7A CN112898042A (en) | 2021-03-26 | 2021-03-26 | Steel slag ceramsite and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110325117.7A CN112898042A (en) | 2021-03-26 | 2021-03-26 | Steel slag ceramsite and preparation method and application thereof |
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| Publication Number | Publication Date |
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| CN112898042A true CN112898042A (en) | 2021-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110325117.7A Withdrawn CN112898042A (en) | 2021-03-26 | 2021-03-26 | Steel slag ceramsite and preparation method and application thereof |
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| CN (1) | CN112898042A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113636772A (en) * | 2021-08-12 | 2021-11-12 | 福建源鑫环保科技有限公司 | Steel slag-based heat-insulating filler and preparation method and application thereof |
-
2021
- 2021-03-26 CN CN202110325117.7A patent/CN112898042A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113636772A (en) * | 2021-08-12 | 2021-11-12 | 福建源鑫环保科技有限公司 | Steel slag-based heat-insulating filler and preparation method and application thereof |
| CN113636772B (en) * | 2021-08-12 | 2022-10-25 | 福建源鑫环保科技有限公司 | Steel slag-based heat-insulating filler and preparation method and application thereof |
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Application publication date: 20210604 |