CN106927786A - A kind of method for preparing foamed brick - Google Patents
A kind of method for preparing foamed brick Download PDFInfo
- Publication number
- CN106927786A CN106927786A CN201611181501.XA CN201611181501A CN106927786A CN 106927786 A CN106927786 A CN 106927786A CN 201611181501 A CN201611181501 A CN 201611181501A CN 106927786 A CN106927786 A CN 106927786A
- Authority
- CN
- China
- Prior art keywords
- adobe
- slurry
- foam
- foamed brick
- clay
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
- C04B33/135—Combustion residues, e.g. fly ash, incineration waste
- C04B33/1352—Fuel ashes, e.g. fly ash
-
- 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
-
- 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
-
- 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
-
- 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
- C04B2235/74—Physical characteristics
- C04B2235/77—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
- 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
-
- 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
Abstract
The present invention relates to a kind of method for preparing foamed brick, it is comprised the following steps：Step one：Clay and/or metallurgical slag carry out fine grinding respectively after being dried with flyash, quick lime；Step 2：Water is added to be made slurry；Step 3：Foaming agent and foam stabilizer are added water into stirring for foam slurry；Step 4：Slurry is added gradually in foam slurry and stirs simultaneously, is made foam slurry；Step 5：Above-mentioned slurry is put into die for molding into adobe, and adobe is dried, the demoulding；Step 6：It is calcined by dried adobe, the adobe after roasting is cooled to room temperature and obtains foamed brick.The porous brick of preparation method production of the invention has the advantages that small lightweight, density, insulation and sound insulation property are good, is primary raw material due to using clay, metallurgical slag, therefore also have the advantages that environmental protection, energy-conservation.
Description
Technical field
It is particularly a kind of to be prepared by clay and/or metallurgical waste slag the present invention relates to a kind of preparation method for preparing foamed brick
The method of foamed brick.
Background technology
With the development of Building Trade in China, solid block is due to high energy consumption, the big shortcoming of land resource consumption, mesh
It is preceding to have prohibitted the use of.Government just promotes green building at present, actively pushes forward building energy conservation, many new technology of building trade
It is developed, wherein foamed brick has the advantages that lightweight, insulation, resistance sound as a kind of new construction material, so that
To being widely applied.
A kind of method that utilization flyash produces foamed brick is disclosed in the prior art.The method is produced for low temperature reservation method
Foamed brick, mainly by the hydraulicity of cement, flyash has certain hydraulicity to brick strength, but intensity is less, therefore, this side
The foamed brick compression strength of method production is relatively low, it is impossible to used as load-bearing material, and the method primary raw material is done using flyash and
Metallurgical waste slag is not used, the chemical composition of metallurgical waste slag is very different compared with flyash, therefore the method is without general
Property.
Therefore, in order to solve above-mentioned problems of the prior art, it is necessary to a kind of clay and/or metallurgical waste slag are main
The method that raw material prepares ultralow density foam brick.
The content of the invention
Regarding to the issue above, it is an object of the invention to provide a kind of method for preparing foamed brick.
To reach above-mentioned purpose, the present invention is adopted the following technical scheme that：
According to the present invention, there is provided a kind of method for preparing foamed brick, comprise the following steps：
Step one：Fine grinding is carried out respectively after clay and/or metallurgical slag are dried with flyash, quick lime；
Step 2：The clay and/or metallurgical slag that fine grinding in step one is completed are well mixed with flyash, quick lime, and
Water is added to be made slurry；
Step 3：Foaming agent and foam stabilizer are added water into stirring for foam slurry；
Step 4：The slurry that will be made in step 2 is added gradually in the foam slurry of step 3 preparation and while stirs
Mix, be made foam slurry.
Step 5：Above-mentioned foam slurry is put into die for molding into adobe, and adobe is dried, completed drying
The adobe demoulding；
Step 6：Adobe after the demoulding in step 5 is calcined, the adobe after roasting is cooled to room temperature and obtains foam
Brick.
Further, the fine grinding in step one uses rod milling or ball milling.
Further, the granularity after flyash, quick lime, clay and metallurgical slag fine grinding is below 200 mesh.
Further, clay and/or metallurgical slag, flyash and quick lime mixed proportion are in step 2：Clay and/or smelting
Golden slag 4-7 weight portions, flyash 1-3 weight portions, quick lime 2-4 weight portions.
Further, foaming agent and foam stabilizer mixed proportion are：Foaming agent 4-7 weight portions, foam stabilizer 1-3 weight portions.
Further, the drying temperature of adobe is 105-120 DEG C in step 5.
Further, the drying time of adobe is 12-24 hours in step 5.
Further, it is less than 1% through the dried adobe water content of step 5.
Further, adobe sintering temperature is 1000-1200 DEG C in step 6.
Further, adobe roasting time is 5-45 minutes in step 6.
Further, the granularity in step 2 after flyash, quick lime, clay and metallurgical slag fine grinding is below 200 mesh
Compound accounts for more than the 90% of oeverall quality.
Further, foaming agent can be lauryl sodium sulfate, sodium sulfate of polyethenoxy ether of fatty alcohol, rosin soap hair
One or more of infusion, animal/vegetable protein class foaming agent；Foam stabilizer can be steady sodium carboxymethylcellulose, polyacrylamide etc.
Infusion one or two.
The beneficial effects of the invention are as follows：
(1) can be using clay, flyash, metallurgical slag, quick lime etc. as raw material, raw material is applied widely, foaming agent
Can be organic foaming agent or inorganic foaming agent.
(2) using matrix material fine grinding, slurrying；Foaming agent, foam stabilizer foam；Slurry and foam be made foam slurry,
Shaping, drying, the demoulding, the porous brick of the technique productions of roasting have small lightweight, density, insulation and good excellent of sound insulation property
Point, is primary raw material due to using clay, metallurgical slag, therefore also has the advantages that environmental protection, energy-conservation.
(3) due to using sintering process in preparation method, (adobe sintering temperature is 1000-1200 DEG C, and roasting time is 5-
The characteristics of 45min) foamed brick of production has compression strength high.
(4) due to using foaming agent, foam stabilizer foam in preparation method, given birth to after being made foam slurry by slurry and foam
The characteristics of foamed brick of product has extremely-low density.
Brief description of the drawings
Fig. 1 is the process chart for preparing foamed brick of the invention.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with the accompanying drawings and embodiment, it is right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the present invention, not
For limiting the present invention.
Embodiment 1
As shown in figure 1, the matrix material that 5000kg clays are constituted with the flyash of 2000kg and the quick lime of 3000kg
Carry out fine grinding after drying with ball milling respectively, fine grinding completes standard for fine mill size is account for oeverall quality 90% below 200 mesh
More than.Clay, flyash, quick lime after fine grinding add the water of 5000kg to be stirred after mixing, and are uniformly mixing to obtain slurry.
By in the foaming agent of 500kg and 200kg foam stabilizers addition 2000kg water, stirring is made foam slurry.By slurry pipeline transport to foam
In slurry tank, while being stirred to slurry, foam slurry is finally given.Foam slurry is delivered to 200mm*100mm*60mm
In the adobe mould of shape.During adobe delivered into drying box through transmission belt together with mould, temperature is 120 DEG C in drying box, is dried
Time 24h, the dried adobe water content is less than 1%.By the adobe demoulding after the completion of drying, roasted in feeding roaster
Burn, sintering temperature is respectively 1000 DEG C, 1050 DEG C, 1100 DEG C, 1200 DEG C, soaking time difference 10min, 20min, 30min,
45min, obtains the foamed brick after 4 batches of roastings.After the foamed brick cooling that 4 batches of roastings are completed finished foam brick is obtained to room temperature.
After testing, the density of 4 batches of foamed bricks is respectively less than 200kg/m-3, compression strength be more than 25MPa, meet density of the GB to foamed brick
It is required that.
Foaming agent can be lauryl sodium sulfate, sodium sulfate of polyethenoxy ether of fatty alcohol, rosin soap foaming agent, dynamic plant
One or more of thing protide foaming agent；Foam stabilizer can be the one of the foam stabilizers such as sodium carboxymethylcellulose, polyacrylamide
Plant or two kinds.
Embodiment 2
As shown in figure 1, the base that the metallurgical waste slag of 5000kg is constituted with the flyash of 2000kg and the quick lime of 3000kg
Carry out fine grinding after body raw material stoving with ball milling respectively, fine grinding completes standard for fine mill size is to account for oeverall quality below 200 mesh
More than 90%.Metallurgical waste slag, flyash, quick lime after fine grinding add the water of 5000kg to be stirred after mixing, and stirring is equal
It is even to obtain slurry.By in the foaming agent of 400kg and 100kg foam stabilizers addition 1000kg water, stirring is made foam slurry.By slurry
It is delivered in foam slurry tank, while being stirred to slurry, finally gives foam slurry.Foam slurry is delivered to 200mm*
In the adobe mould of 100mm*60mm shapes.During adobe delivered into drying box through transmission belt together with mould, temperature is in drying box
105 DEG C, drying time 24h, the dried adobe water content is less than 1%.By the adobe demoulding after the completion of drying, feeding roasting
Burn kiln roasting, sintering temperature is respectively 1000 DEG C, 1050 DEG C, 1100 DEG C, 1200 DEG C, soaking time difference 10min, 20min,
30min, 45min, obtain the foamed brick after 4 batches of roastings.After the foamed brick cooling that 4 batches of roastings are completed finished product bubble is obtained to room temperature
Foam brick.After testing, the density of 4 batches of foamed bricks is respectively less than 200kg/m-3, compression strength be more than 20MPa, meet GB to foamed brick
Density requirements.
Foaming agent can be lauryl sodium sulfate, sodium sulfate of polyethenoxy ether of fatty alcohol, rosin soap foaming agent, dynamic plant
One or more of thing protide foaming agent；Foam stabilizer can be the one of the foam stabilizers such as sodium carboxymethylcellulose, polyacrylamide
Plant or two kinds.
Embodiment 3
As shown in figure 1, by the metallurgical waste slag of the clay of 5000kg and 2000kg with 3000kg flyash and 4000kg
Carry out fine grinding with ball milling respectively after the matrix material drying of quick lime composition, fine grinding complete standard be fine mill size be 200 mesh with
Under account for oeverall quality more than 90%.Clay, metallurgical waste slag, flyash, quick lime after fine grinding add 7000kg after mixing
Water be stirred, be uniformly mixing to obtain slurry.By in the foaming agent of 700kg and 300kg foam stabilizers addition 3000kg water, stir
It is made foam slurry.By in slurry pipeline transport to foam slurry tank, while being stirred to slurry, foam slurry is finally given.Will
Foam slurry is delivered in the adobe mould of 200mm*100mm*60mm shapes.Adobe is delivered into drying together with mould through transmission belt
In case, temperature is 110 DEG C in drying box, and drying time 24h, the dried adobe water content is less than 1%.Completed drying
The adobe demoulding afterwards, feeding roasting kiln roasting, sintering temperature is respectively 1000 DEG C, 1050 DEG C, 1100 DEG C, 1200 DEG C, insulation
Time distinguishes 10min, 20min, 30min, 45min, obtains the foamed brick after 4 batches of roastings.The foamed brick that 4 batches of roastings are completed is cold
But finished foam brick is obtained after to room temperature.After testing, the density of 4 batches of foamed bricks is respectively less than 200kg/m-3, compression strength is more than
20MPa, meets density requirements of the GB to foamed brick.
Foaming agent can be lauryl sodium sulfate, sodium sulfate of polyethenoxy ether of fatty alcohol, rosin soap foaming agent, dynamic plant
One or more of thing protide foaming agent；Foam stabilizer can be the one of the foam stabilizers such as sodium carboxymethylcellulose, polyacrylamide
Plant or two kinds.
Embodiment 4
As shown in figure 1, the matrix material that 5000kg clays are constituted with the flyash of 2000kg and the quick lime of 3000kg
Carry out fine grinding after drying with ball milling respectively, fine grinding completes standard for fine mill size is account for oeverall quality 90% below 200 mesh
More than.Clay, flyash, quick lime after fine grinding add the water of 5000kg to be stirred after mixing, and are uniformly mixing to obtain slurry.
By in the foaming agent of 500kg and 200kg foam stabilizers addition 2000kg water, stirring is made foam slurry.By slurry pipeline transport to foam
In slurry tank, while being stirred to slurry, foam slurry is finally given.Foam slurry is delivered to 200mm*100mm*60mm
In the adobe mould of shape.During adobe delivered into drying box through transmission belt together with mould, temperature is 120 DEG C in drying box, is dried
Time 12h, the dried adobe water content is less than 1%.By the adobe demoulding after the completion of drying, roasted in feeding roaster
Burn, sintering temperature is respectively 1050 DEG C, 1100 DEG C, 1150 DEG C, 1200 DEG C, soaking time difference 5min, 15min, 35min,
45min, obtains the foamed brick after 4 batches of roastings.After the foamed brick cooling that 4 batches of roastings are completed finished foam brick is obtained to room temperature.
After testing, the density of 4 batches of foamed bricks is respectively less than 200kg/m-3, compression strength be more than 20MPa, meet density of the GB to foamed brick
It is required that.
Foaming agent can be lauryl sodium sulfate, sodium sulfate of polyethenoxy ether of fatty alcohol, rosin soap foaming agent, dynamic plant
One or more of thing protide foaming agent；Foam stabilizer can be the one of the foam stabilizers such as sodium carboxymethylcellulose, polyacrylamide
Plant or two kinds.
In the method for preparing foamed brick of the invention, when adobe sintering temperature is identical with roasting time, although different originals
The foamed brick compression strength that material and quality proportioning are prepared is close, and density is respectively less than 200kg/m-3, compression strength is in 20-25MPa
More than, the remote excellent foamed brick in the market of density and compression strength (referring to embodiment 1-3).Embodiment 4 illustrate with reality
In the case of applying the identical raw material proportioning of example 1, it is adjusted for sintering temperature and time, the density of the foamed brick for obtaining is still
Less than 200kg/m-3, compression strength has certain versatility in 20MPa preparation methods of the invention described above.
Presently preferred embodiments of the present invention is the foregoing is only, not for limiting practical range of the invention；If do not taken off
From the spirit and scope of the present invention, the present invention is modified or equivalent, all should covered in the claims in the present invention
In the middle of protection domain.
Claims (8)
1. a kind of method for preparing foamed brick, it is characterised in that comprise the following steps：
Step one：Fine grinding is carried out respectively after clay and/or metallurgical slag are dried with flyash, quick lime；
Step 2：The clay and/or metallurgical slag that fine grinding in step one is completed are well mixed with flyash, quick lime, and add
Water is made slurry；
Step 3：Foaming agent and foam stabilizer are added water into stirring for foam slurry；
Step 4：The slurry that will be made in step 2 is added gradually in the foam slurry of step 3 preparation and stirs simultaneously, system
Into foam slurry.
Step 5：Above-mentioned foam slurry is put into die for molding into adobe, and adobe is dried, the brick for completing will be dried
The base demoulding；
Step 6：Adobe after the demoulding in step 5 is calcined, the adobe after roasting is cooled to room temperature and obtains foamed brick.
2. the method for preparing foamed brick according to claim 1, it is characterised in that the fine grinding in the step one uses rod
Mill or ball milling.
3. the method for preparing foamed brick according to claim 1, it is characterised in that flyash, quick lime, clay and metallurgy
Granularity after slag fine grinding is for below 200 mesh.
4. the method for preparing foamed brick according to claim 1, it is characterised in that clay and/or smelting in the step 2
Golden slag, flyash and quick lime mixed proportion are：Clay and/or metallurgical slag 4-7 weight portions, flyash 1-3 weight portions, quick lime
2-4 weight portions.
5. the method for preparing foamed brick according to claim 1, it is characterised in that foaming agent and foam stabilizer mixed proportion
For：Foaming agent 4-7 weight portions, foam stabilizer 1-3 weight portions.
6. the method for preparing foamed brick according to claim 1, it is characterised in that adobe described in the step 5 it is dry
Dry temperature is 105-120 DEG C.
7. the method for preparing foamed brick according to claim 1, it is characterised in that adobe described in the step 5 it is dry
The dry time is 12-24 hours.
8. the method for preparing foamed brick according to claim 1, it is characterised in that dried described through the step 5
Adobe water content is less than 1%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611181501.XA CN106927786A (en) | 2016-12-19 | 2016-12-19 | A kind of method for preparing foamed brick |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611181501.XA CN106927786A (en) | 2016-12-19 | 2016-12-19 | A kind of method for preparing foamed brick |
Publications (1)
| Publication Number | Publication Date |
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| CN106927786A true CN106927786A (en) | 2017-07-07 |
Family
ID=59444585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201611181501.XA Pending CN106927786A (en) | 2016-12-19 | 2016-12-19 | A kind of method for preparing foamed brick |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107556041A (en) * | 2017-07-27 | 2018-01-09 | 河钢股份有限公司邯郸分公司 | A kind of method that foamed brick is prepared using coking chemical waste water sludge and tar slag |
| CN108383543A (en) * | 2018-04-13 | 2018-08-10 | 闽南师范大学 | Hollow brick embeds spherolite foamed brick and preparation method thereof |
| CN109503120A (en) * | 2018-12-27 | 2019-03-22 | 广州华隆建筑材料有限公司 | A kind of acoustic brick and preparation method thereof of high intensity |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107556041A (en) * | 2017-07-27 | 2018-01-09 | 河钢股份有限公司邯郸分公司 | A kind of method that foamed brick is prepared using coking chemical waste water sludge and tar slag |
| CN108383543A (en) * | 2018-04-13 | 2018-08-10 | 闽南师范大学 | Hollow brick embeds spherolite foamed brick and preparation method thereof |
| CN108383543B (en) * | 2018-04-13 | 2020-12-29 | 闽南师范大学 | Foam brick with spherical particles embedded in hollow brick and preparation method thereof |
| CN109503120A (en) * | 2018-12-27 | 2019-03-22 | 广州华隆建筑材料有限公司 | A kind of acoustic brick and preparation method thereof of high intensity |
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