CN108794052A - A kind of shale insulated microporous brick of sludge and preparation method thereof - Google Patents
A kind of shale insulated microporous brick of sludge 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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
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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
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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
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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
- C04B33/32—Burning methods
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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
- C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
- C04B38/063—Preparing or treating the raw materials individually or as batches
- C04B38/0635—Compounding ingredients
- C04B38/0645—Burnable, meltable, sublimable materials
- C04B38/0665—Waste material; Refuse other than vegetable refuse
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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
- C04B2235/6562—Heating rate
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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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- 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
- C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
-
- 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 shale insulated microporous bricks of a kind of sludge and preparation method thereof, are prepared by the raw material of following mass percent：Shale 70-75%, sludge 15-20%, gangue 5-15%, and the sodium carboxymethylcellulose of mixture total mass 0.5% is added, preparation method is included that raw material is broken, matches mixing, raw material grinding, secondary sieving, is molded moisture content plus water stirring, ageing maintenance, multistage drying, the test of raw material thermal property, setting firing stage, green body roasting based on grain size proportion mixing, test.Present invention utilizes shale, sludge, gangue and additives, realize sludge and the gangue recycling in fired brick, not only consumption has handled sludge and gangue, mitigate carrying capacity of environment, and sludge and gangue are shared and make fired brick pore creating material, so that fired brick is had the features such as lightweight, insulation, sqouynd absorption lowering noise.
Description
Technical field
The present invention relates to building material fields, more particularly, to shale insulated microporous brick of a kind of sludge and preparation method thereof.
Background technology
With the quickening of Chinese Urbanization course, city size constantly expands and urban population is increased sharply, by industrial and daily
The discharge capacity for the sludge that life generates rapidly increases, and the processing pressure of sludge is increasing.The environmental protection treatment and resource of sludge
Change to utilize and has become the focus of attention.For the loss on ignition of sludge up to 50%, having can be latent as the application of fired brick pore creating material
Power.Organic matter volatilizees in sludge under high temperature, leaves hole in the original location, forms porous structure, is conducive to the guarantor for promoting fired brick
Warm heat-proof quality.In addition, one of fired brick primary raw material glues clay, Main chemical component is silica, aluminium oxide, oxidation
Calcium, iron oxide etc., this is similar to the component of sludge.It can be considered in the range of chemical composition allows, sludge is mixed
Part of clay is substituted in baked brick raw materials.Further, since organic matter proportion is larger in domestic sludge, there is certain combustion heat
Value is used for brickmaking, can reduce energy consumption.Therefore, part of clay is suitably replaced to be used as the raw material of sintering walling not only in sludge
Only can with recycling treatment solid waste, can also meet fired brick for lightweight, thermal and insulating performance promoted the needs of, meet it is energy saving,
Useless, the environmentally friendly theory of profit.
Clay is the primary raw material of fired brick.Traditional sintering method can consume a large amount of clay, cause the destruction in arable land.
By taking the distribution of China's brick sintering plant and yield as an example, current annual output is about 1,000,000,000,000 pieces of premises, causes greatly to disappear to viscous clay resource
Consumption produces irreversible influence to the quantity in the existing farmland in China and quality.To change this trend, it is necessary to find suitable
The preferably substitute of clay.Shale is a kind of argillaceous rock, containing more viscous clay mineral, primary chemical composition and clay-based
This is identical, can reach the requirement of fired brick raw material.The deposit occupancy volume of China's shale rock can reach total national territorial area
77% or so, be the sedimentary rock mineral resources with apparent application advantage, be increasingly becoming the practical amount in China the most
One of abundant resources reserve object.Therefore raw material of the shale as fired brick are used, fired brick can be met for raw material
It is required that and avoiding destruction for arable land.In some hilly countries, the exploitation of shale, which can even cut into a mountain, builds up fields.
Gangue is the phosphorus content association black rock generated in coal forming process, is made during coal mining and coal washing
It is discharged for solid waste, yield accounts for about the 5%-25% of coal mining amount.The gangue accumulated in China has reached 1,000,000,000 tons,
And increased with annual 100000000 tons of speed.If gangue is thrown aside stacking, a large amount of soils can be occupied.Containing a large amount of in gangue
Sulfide, effusion or leaching can cause air and water pollution, and to environmental and human health impacts, there are serious threats.Together
When, there are spontaneous combustion risks for gangue, there is great security risk.The main component of gangue, such as silica, aluminium oxide, oxidation
Calcium, iron oxide etc. also can be used as the raw material of sinter walling materials.There are a certain amount of carbon in gangue simultaneously, are roasting
Cheng Zhong not only discharges saving of heat and roasts energy consumption, but also leaves hole after carbon burning in the original location, also there is certain pore-creating effect.
Invention content
Based on above-mentioned background technology, present invention offer is a kind of to utilize sludge, gangue, shale and suitable additive one
Determine the heat preservation microporous brick prepared under process conditions, it is scientific and efficient that large waste such as sludge and gangue is utilized, reduce environment
Load improves its recycling level and business added value, develops a kind of High-performance green construction material.
The invention is realized by the following technical scheme：
A kind of shale insulated microporous brick of sludge, is prepared by the raw material of following mass percent：It is changed by absolute dry mass
It calculates, shale 70-75%, sludge 15-20%, gangue 5-15%, and the carboxymethyl cellulose of mixture total mass 0.5% is added
Sodium.
Further, the shale, sludge and gangue use powder granule object, are carried out respectively through 2mm sieves and 0.2mm sieves
Primary sieving and secondary sieving, and the mass ratio of powder is 4 after primary sieving and secondary sieving：6, by controlling mixture particle
Size distribution, grain composition make mixture have enough plasticity, are conducive to be molded, and will not be given because of grain graininess is too small
Body drying brings difficulty；Secondly, ensure that grain composition is relatively reasonable, mixture uniformly mixes, and little particle is filled in bulky grain
Between, be conducive to fired brick mechanical property.
A kind of preparation method of the shale insulated microporous brick of sludge, specifically includes following steps：
(1) dry sludge, shale and gangue are crushed in grinding device respectively, obtains granular substance, presses
Proportioning mixes them, and grinding, sieving, obtain mixture powder later；
(2) sodium carboxymethylcellulose (CMC) is added in mixture powder and is used as flocculant, water stirring is added to prepare pug,
Pug merging fog room is aged；
(3) pug after ageing is placed in die for molding and green body is made, by the body drying of forming, after making drying
Green body moisture content is less than 5%；
(4) by the green body merging sintering furnace roasting after drying, product is obtained.
Further, step (1) grinding device is jaw crusher, hammer mill or fine crusher, after crushing
Grain grain size is in 5mm or less.
Further, the plasticity index of step (2) control pug is 10-17.
Further, amount of water is specifically determined by following methods：Water is added to be stirred with mixture powder, until mixture powder
Plasticity is shown by powder, pug is then filled up into soil sample cup, rim of a cup is smoothed out, soil is crashed by soil Atterberg Limit tester cone
Sample cup depth weigh plasticity of slurry deformability, when depth be less than 6mm, continue plus water stirring, until depth be the positions 6mm.With
The pug of part at this time is taken out afterwards and is placed in oven drying, is obtained it and is molded moisture content, acquired blank forming moisture content is in 20-
Between 25%；
Further, fog room of the pug merging relative humidity more than 85% is aged 22-26h by step (2).
Further, the green body of step (3) forming promotes drying temperature at 35-45 DEG C after dry 1.5-2.5h
At to 100-110 DEG C, dry 3.5-4.5h.
Further, step (4) is warming up to preheating temperature with 5 DEG C/min heating rates, keep the temperature after 30min again with 5 DEG C/
Min is warming up to 900-950 DEG C, after keeping the temperature 1h at the maximum temperature, is cooled to room temperature with stove.
Further, the preheating temperature is 400-500 DEG C, and preheating temperature is by the thermogravimetric curve of sludge and gangue weightlessness
Temperature range determines where peak-to-peak value, generally at 400 DEG C -500 degrees Celsius, this temperature is set warm-up phase, is conducive to green body
Middle organic matter is pyrolyzed or burns completely in green body, leaves hole in the original location, to adjust green body pore structure, to be promoted
Brick heat-insulating property, and avoid because organic matter and carbon are closed in green body and it is imperfect combustion, make to occur inside green body " black
The situation of the heart ".
The present invention considers the urgency that sewage sludge and gangue recycle and keeps the temperature more needed for micropore sintered brick
The design features such as hole lightweight have searched out suitable raw material proportioning and preparation flow, by using gangue, sewage sludge, page
Rock and additive are prepared heat preservation microporous brick in conjunction with suitable calcining system and process, are not only alleviated as raw material
Sludge and gangue are seriously born caused by environment, reduce its additional disposal costs；And utilize sewage sludge and gangue
The pore structure for improving fired brick, obtains that bulk density is low, heat-insulating property is fabulous and the heat preservation of good mechanical performance is micropore sintered
Brick.
Compared with prior art, beneficial effects of the present invention are as follows：
1, the used raw material of the present invention is shale, sludge, gangue and additive, realizes sludge and gangue in fired brick
Middle recycling, not only consumption have handled sludge and gangue, alleviate carrying capacity of environment, and sludge and gangue are shared
Make fired brick pore creating material, fired brick is made to have the features such as lightweight, insulation, sqouynd absorption lowering noise；
2, the present invention uses secondary screen method, control mixed raw material grading distribution, and is tested by soil Atterberg Limit
Instrument cone is fallen in pug, and depth measurement pug deformability determination is best to be molded moisture content, is aided with CMC flocculants, pug is made to mould
Property property it is good, be easy to be molded, solve the problems, such as that incorporation sludge and gangue cause mixed-forming difficult, and obtained green compact are strong
Degree is higher, drying shrinkage rate is low；
3, preheating temperature is arranged by raw material thermogravimetric curve, not only makes sludge and gangue completely burned or pyrolysis, fully
Play its effect as pore creating material so that green body improves green body pore structure, and avoids organic matter or gangue in sludge
Middle carbon be closed in inside green body it is imperfect combustion, make to form reducing environment inside green body and cause " evil mind " problem；
4, microporous brick is kept the temperature obtained by the present invention, gained fired brick presentation quality is good, flawless, without unfilled corner, internal nothing
" evil mind ", and have good mechanical property and heat-insulating property, bulk density 1300-1500kg/m3, compression strength is
17MPa-25MPa, thermal coefficient are 0.35-0.45W/ (mK), and soak at room temperature water absorption rate is 18%-24% for 24 hours.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention be more clear, below in conjunction with specific example, the present invention is carried out
It is further described.Described herein specific examples are only used to explain the present invention, is not intended to limit the present invention.
Embodiment 1
A kind of preparation method of the shale insulated microporous brick of sludge, includes the following steps：
S1：The sludge that the moisture content that sewage treatment plant ships is 90% or more is placed in and shines factory, is tedded 3 days, it then will be dirty
Mud is dried, and so that its moisture content is less than 10%, is obtained sludge block；
S2：Shale, sludge, gangue are crushed in jaw crusher, hammer mill, fine crusher three-level respectively
Machine obtains shale particle, mud granule and coal gangue particle, grain diameter 5mm or less；
S3：Shale particle after converting according to absolute dry mass, mud granule, coal gangue particle mass ratio 75%, 15%,
10%, it mixes, then sieving obtains mixture powder after planetary ball mill grinding 15-20min；Powder exists respectively after grinding
2mm sieves, 0.2mm sieves carry out once sieving and secondary sieving, powder after primary sieving and secondary sieving, and electronic scale weighs 4：6
In the primary sieving of mass ratio and secondary sieving powder merging blender；
S4：The 0.5%CMC powders for weighing above-mentioned mixture quality are placed in blender as flocculant, after stirring 3min, take
Go out part dry mixture powder, mixture is filled up into soil sample cup, rim of a cup is smoothed out, soil is crashed by soil Atterberg Limit tester cone
Sample cup depth weighs plasticity of slurry deformability, when depth is less than 6mm, continues plus water, until depth is the positions 6mm, then takes
Go out the pug merging oven drying of part at this time, obtains it and be molded moisture content to be 24%.According to gained moisture content, weighs and mix at this time
24% water for closing material quality is added in blender, is stirred 5min and obtains pug, then pug is transported to relative humidity and is more than
85% fog room is aged for 24 hours, and to increase the processability of pug, it is 13 to obtain mixture plasticity index；
S5：Pug after ageing is placed in die for molding base body, pressure base；
S6：After dry 2h, drying temperature is promoted at 105 DEG C at 40 DEG C for the green body of forming, dry 4h is dry
Green body moisture content afterwards is less than 5%；
S7：According to the thermogravimetric curve of sludge and gangue, preheating temperature is set as 400 DEG C.Green body after drying is set
Enter in sintering furnace and 400 DEG C of preheating temperature is warming up to 5 DEG C/min heating rates, is warming up to again with 5 DEG C/min after keeping the temperature 30min
900 DEG C, after keeping the temperature 1h at the maximum temperature, furnace cooling.
The heat preservation microporous brick performance parameter of gained is shown in Table 1.
1 embodiment 1 of table keeps the temperature microporous brick performance parameter
Embodiment 2
A kind of preparation method of the shale insulated microporous brick of sludge, includes the following steps：
S1：The sludge that the moisture content that sewage treatment plant ships is 90% or more is placed in and shines factory, is tedded 3 days, it then will be dirty
Mud is dried, and so that its moisture content is less than 10%, is obtained sludge block；
S2：Shale, sludge, gangue are crushed in jaw crusher, hammer mill, fine crusher three-level respectively
Machine obtains shale particle, mud granule and coal gangue particle, grain diameter 5mm or less；
S3：Shale particle after converting according to absolute dry mass, mud granule, coal gangue particle mass ratio 70%, 15%,
15%, it mixes, then sieving obtains mixture powder after planetary ball mill grinding 15-20min；Powder exists respectively after grinding
2mm sieves, 0.2mm sieves carry out once sieving and secondary sieving, powder after primary sieving and secondary sieving, and electronic scale weighs 4：6
In the primary sieving of mass ratio and secondary sieving powder merging blender；
S4：The 0.5%CMC powders for weighing above-mentioned mixture quality are placed in blender as flocculant, after stirring 3min, take
Go out part dry mixture powder, mixture is filled up into soil sample cup, rim of a cup is smoothed out, soil is crashed by soil Atterberg Limit tester cone
Sample cup depth weighs plasticity of slurry deformability, when depth is less than 6mm, continues plus water, until depth is the positions 6mm, then takes
Go out the pug merging oven drying of part at this time, obtains it and be molded moisture content.According to gained moisture content 22%, weighs and mix at this time
Expect that the water of quality 22% is added in blender, is stirred 5min and obtains pug, then pug is transported to relative humidity and is more than
85% fog room is aged for 24 hours, and to increase the processability of pug, it is 11 to obtain mixture plasticity index；
S5：Pug after ageing is placed in die for molding base body, pressure base；
S6：After dry 2h, drying temperature is promoted at 105 DEG C at 40 DEG C for the green body of forming, dry 4h is dry
Green body moisture content afterwards is less than 5%；
S7：According to the thermogravimetric curve of sludge and gangue, preheating temperature is set as 400 DEG C.Green body after drying is set
Enter in sintering furnace and 400 DEG C of preheating temperature is warming up to 5 DEG C/min heating rates, is warming up to again with 5 DEG C/min after keeping the temperature 30min
950 DEG C, after keeping the temperature 1h at the maximum temperature, furnace cooling.
The heat preservation microporous brick performance parameter of gained is shown in Table 2.
2 embodiment 2 of table keeps the temperature microporous brick performance parameter
Embodiment 3
A kind of preparation method of the shale insulated microporous brick of sludge, includes the following steps：
S1：The sludge that the moisture content that sewage treatment plant ships is 90% or more is placed in and shines factory, is tedded 3 days, it then will be dirty
Mud is dried, and so that its moisture content is less than 10%, is obtained sludge block；
S2：Shale, sludge, gangue are crushed in jaw crusher, hammer mill, fine crusher three-level respectively
Machine obtains shale particle, mud granule and coal gangue particle, grain diameter 5mm or less；
S3：Shale particle after converting according to absolute dry mass, mud granule, coal gangue particle mass ratio 70%, 20%,
10%, it mixes, then sieving obtains mixture powder after planetary ball mill grinding 15-20min；Powder exists respectively after grinding
2mm sieves, 0.2mm sieves carry out once sieving and secondary sieving, powder after primary sieving and secondary sieving, and electronic scale weighs 4：6
In the primary sieving of mass ratio and secondary sieving powder merging blender；
S4：The 0.5%CMC powders for weighing above-mentioned mixture quality are placed in blender as flocculant, after stirring 3min, take
Go out part dry mixture powder, mixture is filled up into soil sample cup, rim of a cup is smoothed out, soil is crashed by soil Atterberg Limit tester cone
Sample cup depth weighs plasticity of slurry deformability, when depth is less than 6mm, continues plus water, until depth is the positions 6mm, then takes
Go out the pug merging oven drying of part at this time, obtains it and be molded moisture content to be 26%.According to gained moisture content, weighs and mix at this time
26% water for closing material quality is added in blender, is stirred 5min and obtains pug, then pug is transported to relative humidity and is more than
85% fog room is aged for 24 hours, and to increase the processability of pug, it is 15 to obtain mixture plasticity index；
S5：Pug after ageing is placed in die for molding base body, pressure base；
S6：After dry 2h, drying temperature is promoted at 105 DEG C at 40 DEG C for the green body of forming, dry 4h is dry
Green body moisture content afterwards is less than 5%；
S7：According to the thermogravimetric curve of sludge and gangue, preheating temperature is set as 450 DEG C.Green body after drying is set
Enter in sintering furnace and 400 DEG C of preheating temperature is warming up to 5 DEG C/min heating rates, is warming up to again with 5 DEG C/min after keeping the temperature 30min
950 DEG C, after keeping the temperature 1h at the maximum temperature, furnace cooling.
The heat preservation microporous brick performance parameter of gained is shown in Table 3.
3 embodiment 3 of table keeps the temperature microporous brick performance parameter
Claims (10)
1. a kind of shale insulated microporous brick of sludge, which is characterized in that be prepared by the raw material of following mass percent：By exhausted
Dry mass converts, shale 70-75%, sludge 15-20%, gangue 5-15%, and the carboxylic first of mixture total mass 0.5% is added
Base sodium cellulosate.
2. the shale insulated microporous brick of a kind of sludge according to claim 1, which is characterized in that the shale, sludge and coal
Spoil uses powder granule object, carries out primary sieving and secondary sieving, and primary sieving and two through 2mm sieves and 0.2mm sieves respectively
The mass ratio of powder is 4 after secondary sieving：6.
3. a kind of a kind of preparation method of the shale insulated microporous brick of sludge as claimed in claim 1 or 2, which is characterized in that tool
Body includes the following steps：
(1) dry sludge, shale and gangue are crushed in grinding device respectively, obtains granular substance, according to the ratio
They are mixed, grinding, sieving, obtain mixture powder later；
(2) sodium carboxymethylcellulose is added in mixture powder as flocculant, adds water stirring to prepare pug, pug is placed in
Fog room is aged；
(3) pug after ageing is placed in die for molding and green body is made, by the body drying of forming, make the green body after drying
Moisture content is less than 5%；
(4) by the green body merging sintering furnace roasting after drying, product is obtained.
4. a kind of preparation method of the shale insulated microporous brick of sludge according to claim 3, which is characterized in that step (1)
Grinding device is jaw crusher, hammer mill or fine crusher, and grain diameter is in 5mm or less after crushing.
5. a kind of preparation method of the shale insulated microporous brick of sludge according to claim 3, which is characterized in that step (2)
The plasticity index for controlling pug is 10-17.
6. a kind of preparation method of the shale insulated microporous brick of sludge according to claim 5, which is characterized in that amount of water has
Body is determined by following methods：Water is added to be stirred with mixture powder, until mixture powder shows plasticity by powder, then by mud
Material fills up soil sample cup, smoothes out rim of a cup, and crashing into soil sample cup depth by soil Atterberg Limit tester cone weighs plasticity of slurry deformation
Ability, when depth be less than 6mm, continue plus water stirring, until depth be the positions 6mm.
7. a kind of preparation method of the shale insulated microporous brick of sludge according to claim 3, which is characterized in that step (2)
Fog room of the pug merging relative humidity more than 85% is aged 22-26h.
8. a kind of preparation method of the shale insulated microporous brick of sludge according to claim 3, which is characterized in that step (3)
After dry 1.5-2.5h, drying temperature is promoted at 100-110 DEG C at 35-45 DEG C for the green body of forming, dry 3.5-
4.5h。
9. a kind of preparation method of the shale insulated microporous brick of sludge according to claim 3, which is characterized in that step (4)
It is warming up to preheating temperature with 5 DEG C/min heating rates, 900-950 DEG C is warming up to again with 5 DEG C/min after keeping the temperature 30min, in highest
At a temperature of heat preservation 1h after, cool to room temperature with the furnace.
10. a kind of preparation method of the shale insulated microporous brick of sludge according to claim 9, which is characterized in that described pre-
Hot temperature is 400-500 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810582153.XA CN108794052B (en) | 2018-06-07 | 2018-06-07 | Sludge shale heat-preservation microporous brick and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810582153.XA CN108794052B (en) | 2018-06-07 | 2018-06-07 | Sludge shale heat-preservation microporous brick and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108794052A true CN108794052A (en) | 2018-11-13 |
| CN108794052B CN108794052B (en) | 2021-06-04 |
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| CN201810582153.XA Active CN108794052B (en) | 2018-06-07 | 2018-06-07 | Sludge shale heat-preservation microporous brick and preparation method thereof |
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Cited By (3)
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| CN109206151A (en) * | 2018-11-19 | 2019-01-15 | 桂林理工大学 | A kind of light thermal-insulation shale brick and preparation method thereof |
| CN109665817A (en) * | 2018-11-22 | 2019-04-23 | 西南科技大学 | A kind of metallurgical slag resource comprehensive utilization method |
| CN111777423A (en) * | 2020-06-12 | 2020-10-16 | 浙江琰大新材料有限公司 | Silicon oxide pouring refractory brick |
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| CN111777423A (en) * | 2020-06-12 | 2020-10-16 | 浙江琰大新材料有限公司 | Silicon oxide pouring refractory brick |
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