CN109250997A - A kind of steam-pressing aero-concrete material and preparation method - Google Patents
A kind of steam-pressing aero-concrete material and preparation method Download PDFInfo
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- CN109250997A CN109250997A CN201811354755.6A CN201811354755A CN109250997A CN 109250997 A CN109250997 A CN 109250997A CN 201811354755 A CN201811354755 A CN 201811354755A CN 109250997 A CN109250997 A CN 109250997A
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/10—Lime cements or magnesium oxide cements
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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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/02—Selection of the hardening environment
- C04B40/024—Steam hardening, e.g. in an autoclave
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
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- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention provides a kind of steam-pressing aero-concrete and preparation method thereof, using graphite tailing, cement, quick lime and ardealite as raw material, CaO and SiO2Mass ratio is 0.5 ~ 0.9, and aluminium powder is as foaming agent.Specifically the graphite tailing, quick lime, cement, ardealite are mixed by mixing ratio, first dry mixing 1min, then 50 DEG C or so of hot water stirs 1min is added, then aluminium powder is poured into, stop stirring after 1min and slurry is poured into die trial be put into 50 DEG C of drying boxes to carry out quiet stopping paying out gas, it is moved into steam pressure reaction kettle after depressed beam pending and carries out steam press maintenance, finally the test block after steam press maintenance is put into 50 DEG C of drying boxes after drying to constant weight and is taken out, steam-pressing aero-concrete material is prepared.The performances such as the steam-pressing aero-concrete compression strength prepared and dry density meet the requirement in GB 11968-2006 to (A5.0, B07) grade steam-pressing aero-concrete.The present invention may additionally facilitate graphite tailing, the high efficiency of ardealite utilizes, and the energy that economizes on resources, protection environment have good economic benefits and social benefit.
Description
Technical field
The present invention relates to a kind of steam-pressing aero-concrete materials and preparation method thereof, belong to the field of building materials.
Background technique
Steam-pressing aero-concrete have porous structure, thermal coefficient it is small (B07 grades of building block thermal coefficient≤0.18W/m K,
B06 grades of building block thermal coefficient≤0.16W/m K), have light and good heat preservation, insulative properties.Since it also has fire prevention
Performance is good and high production efficiency, the features such as production energy consumption is low, in accordance with the requirement of novel wall material, receives construction industry
Most attention becomes a kind of materials for wall that country widelys popularize and develops.The production of steam-pressing aero-concrete is using siliceous
Raw material (such as sand or flyash) and calcareous raw material (such as lime, cement), the foaming agent such as incorporation aluminium powder, and by a series of
Made of process.Currently, the siliceous raw material that steam-pressing aero-concrete production in China's uses are mainly sand or flyash.But
It is that as sand resource gradually appears supply deficiency because river is prevented or restricted from exploitation, and flyash is as cement additive
One of with concrete mineral admixture, supply is not originally abundant, the problem of there is lack of raw materials also occurs.
On the other hand, graphite tailing is that the tailing ore pulp after graphite ore exploitation forms solid waste through natural-dehydration.
After exploiting graphite mines, has a large amount of barren rocks, casting and tailing etc. and generate and accumulate, thus the problems such as causing land seizure, and
And the certain chemical substances wherein contained can cause environmental pollution.Therefore, it is urgently to be resolved for how efficiently using graphite tailing
One of the problem of.Currently, the resource utilization approach of domestic graphite tailing specifically include that recycled from graphite milltailings it is valuable
Mineral, for white carbon black processed, and in building materials industry application (be concentrated mainly on production non-sintered brick, sintered brick and tile, cement
Ingredient and as road basement material etc.).These handle and utilize has pushed China's graphite tailing resource to a certain extent
The technological progress of change, but since it is not totally high using technical level, utilization efficiency is not high, cause still to have newly-increased stone every year
Black tailing bulk deposition.Graphite tailing is as a kind of siliceous solid mining waste, SiO2Content is more slightly higher than flyash, and
SiO2Mainly exist in the form of the mineral such as quartz crystal, thus non-gelling is active under normal temperature and pressure conditions for graphite tailing.But
Under autoclaved condition, SiO2It is greatly improved with the reactivity of lime (or calcium hydroxide).Therefore, graphite tailing has as silicon
The condition of matter raw material production steam-pressing aero-concrete.
Summary of the invention
The present invention produces steam-pressing aero-concrete as siliceous material instead of flyash and sand using graphite tailing, this
Not only alleviate the problem of the raw material supply such as natural sand deficiency, and solve exploitation graphite tailing accumulation and caused by
The problems such as to the occupancy and environmental pollution of land resource.It is found that the present invention simultaneously can also promote graphite tailing, ardealite it is efficient
Rate utilizes, and the energy that economizes on resources, protection environment have good economic benefits and social benefit.
Based on the problem, it is with stone that the present invention, which provides the preparation method of a kind of steam-pressing aero-concrete material and its test block,
Black tailing is as siliceous material, and hydration and hardening provides intensity, aluminium powder under the alkaline environment of cement, quick lime and ardealite system
As foaming agent, prepare it is a kind of have excellent performance, be low in cost, low-carbon environment-friendly materials for wall.
The technical scheme of the present invention is realized as follows:
A kind of steam-pressing aero-concrete construction material, the mass fraction of each raw material are as follows: 50 ~ 64 parts of graphite tailing powder, cement 14 ~
17 parts, 19-30 parts of quick lime, 2-5 parts of ardealite, 0.1~0.14 part of aluminium powder.
The mass ratio of calcium oxide and silica is 0.5 ~ 0.9:1 in raw material, and ratio of water to material is 0.6 ~ 0.65:1.The graphite
SiO in mine tailing2Content is not less than 50%, and specific surface area is not less than 450m2/ kg, fineness are to tail over not in 0.080mm square hole screen
Greater than 8%.CaSO in the ardealite4·2H2O content is not less than 75%.
The cement uses the cement for meeting 32.5 strength grades of " common portland cement " (GB175-2007) specification,
The quick lime grade is II grade and the above quick lime, CaSO in the ardealite4·2H2O content is not less than 75%.
A kind of steam-pressing aero-concrete material the preparation method comprises the following steps:
Heating water to water temperature with thermostat water bath first, to reach 50 DEG C or so spare, then by 50 ~ 64 parts of the graphite tailing powder,
14 ~ 17 parts of cement, 19-30 parts of quick lime, 2-5 parts of ardealite are put into agitated kettle and are stirred 1min, and 50 DEG C of left sides are then added
Right hot water, stirring 1min then pour into 0.1~0.14 part of aluminium powder and are stirred together, stop stirring after 1min to uniform,
The slurry being stirred is poured into die trial, depth is poured about at the 3/4 of mold height, the mold poured is then put into 50
Carried out in DEG C drying box it is quiet stop paying out gas, examination body is moved into steam pressure reaction kettle after gas pending and carry out steam press maintenance, maintenance system
Degree is divided into five stages: the first stage is no pressure gas.The vent valve of steam pressure reaction kettle is opened, is carried out without pressure air, this
When kettle in water vapor pressure be 0MPa.The heat supply into kettle, temperature in the kettle are started to warm up from room temperature, are closed and are put after rising to 100 DEG C
Air valve continues heat supply, and water vapour pressure rises to 0.45-0.5MPa from 0MPa in steam pressure reaction kettle, and temperature is from 100 DEG C at this time
160-170 DEG C is risen to, time-consuming 35-45min；Second stage is the constant temperature and pressure stage, and water vapor pressure is 0.45- in kettle
0.5MPa(, that is, 160-170 DEG C of temperature in the kettle) under conditions of constant pressure 0.8-1.5h；Phase III continues increasing temperature and pressure, makes water in kettle
Steam pressure rises to 1.1-1.2MPa, and corresponding temperature is 190-200 DEG C in kettle at this time；Fourth stage continues to constant temperature and pressure rank
Section (1.1-1.2MPa, 190-200 DEG C), i.e., water vapor pressure is 1.1-1.2MPa(, that is, 190-200 DEG C of temperature in the kettle in kettle)
Under conditions of maintain constant pressure 5-6h；5th stage pressure reduction temperature-fall period stops the heat supply into steam pressure reaction kettle, makes water vapour in kettle
Pressure drops to 0MPa by 1.1-1.2MPa.Then, vent valve is opened, examination body is taken out after waiting gas to be discharged, finally, by steam press maintenance
Examination body afterwards is moved into 50 DEG C of drying boxes after drying to constant weight and is taken out to get steam-pressing aero-concrete of the present invention.
Invention has in place of following marked improvement:
The first, use graphite tailing to substitute traditional flyash and natural sand as siliceous material, alleviate traditional siliceous material
Demand, especically reduce the exploitation of natural sand.
The second, graphite tailing is a kind of solid industrial waste material, is formed through tailing ore pulp natural-dehydration, and the present invention is answered
It uses in steam-pressing aero-concrete, reduces and stack graphite tailing to the occupancy and waste material pollution on the environment of land resource,
The new way of graphite tailing value added applications is opened up.
Specific embodiment
Embodiment 1
A kind of steam-pressing aero-concrete construction material, the quality proportioning of each raw material are as follows:
64 parts of graphite tailing, 14 parts of cement, 19 parts of quick lime, 3 parts of ardealite, 0.1 part of foaming agent aluminium powder, calcium silicon ratio is 0.5,
Ratio of water to material is 0.60；The percentage is mass percent.
The graphite tailing powder specific surface area is not less than 450 m2/ kg, fineness are to tail over not in 0.080mm square hole screen
Greater than 8%, the cement uses the cement for meeting 32.5 strength grades of " common portland cement " (GB175-2007) specification,
The quick lime grade is II grade and the above quick lime, CaSO in the ardealite4·2H2O content is not less than 75%.
A kind of steam-pressing aero-concrete material the preparation method comprises the following steps:
Heating water to water temperature with thermostat water bath first, to reach 50 DEG C or so spare, then by the graphite tailing, quick lime, water
Mud, ardealite are put into agitated kettle according to 64 parts, 19 parts, 14 parts, 3 parts is stirred 1min, and 50 DEG C or so of heat is then added
Water, 1min is to uniform for stirring, then pours into 0.1 part of aluminium powder and is stirred together, stops stirring, the slurry that will be stirred after 1min
Body pours into die trial, pours depth about at the 3/4 of mold height, then by the mold poured be put into 50 DEG C of drying boxes into
Row is quiet to stop paying out gas, moves into steam pressure reaction kettle examination body after gas pending and carries out steam press maintenance, conservation system is divided into five ranks
Section: the first stage is no pressure gas.The vent valve of steam pressure reaction kettle is opened, is carried out without pressure air, at this time water vapour in kettle
Pressure is 0MPa.The heat supply into kettle, temperature in the kettle are started to warm up from room temperature, close vent valve after rising to 100 DEG C, continue to supply
Heat, water vapour pressure rises to 0.5MPa from 0MPa in steam pressure reaction kettle, and temperature rises to 168 DEG C from 100 DEG C at this time, it is time-consuming about
40min；Second stage be the constant temperature and pressure stage, in kettle water vapor pressure be 168 DEG C of 0.5MPa(, that is, temperature in the kettle) condition
Lower constant pressure 1h；Phase III continues increasing temperature and pressure, so that water vapor pressure in kettle is risen to 1.1MPa, corresponding temperature is in kettle at this time
194℃；Fourth stage continues to constant temperature and pressure stage (1.1MPa, 194 DEG C), i.e., water vapor pressure is 1.1MPa in kettle
Constant pressure 6h is maintained under conditions of (i.e. 194 DEG C of temperature in the kettle)；5th stage pressure reduction temperature-fall period stops supplying into steam pressure reaction kettle
Heat makes in kettle water vapor pressure drop to 0MPa by 1.1MPa.Then, vent valve is opened, examination body is taken out after waiting gas to be discharged, most
Afterwards, the examination body after steam press maintenance is moved into 50 DEG C of drying boxes after drying to constant weight and is taken out to get the steam pressurized coagulation of the present invention
Soil.
Embodiment 2
A kind of steam-pressing aero-concrete construction material, the quality proportioning of each raw material are as follows:
60 parts of graphite tailing, 15 parts of cement, 22 parts of quick lime, 3 parts of ardealite.Its calcium silicon ratio is 0.6, foaming agent aluminium powder 0.14
Part, ratio of water to material 0.65；The percentage is mass percent.
The graphite tailing powder specific surface area is not less than 450 m2/ kg, fineness are to tail over not in 0.080mm square hole screen
Greater than 8%, the cement uses the cement for meeting 32.5 strength grades of " common portland cement " (GB175-2007) specification,
The quick lime grade is II grade and the above quick lime, CaSO in the ardealite4·2H2O content is not less than 75%.
A kind of steam-pressing aero-concrete material the preparation method comprises the following steps:
Heating water to water temperature with thermostat water bath first, to reach 50 DEG C or so spare, then by the graphite tailing, quick lime, water
Mud, ardealite are put into agitated kettle according to 60 parts, 22 parts, 15 parts, 3 parts is stirred 1min, and 50 DEG C or so of heat is then added
Water, 1min is to uniform for stirring, then pours into 0.14 part of aluminium powder and is stirred together, stops stirring after 1min, by what is be stirred
Slurry pours into die trial, pours depth about at the 3/4 of mold height, then the mold poured is put into 50 DEG C of drying boxes
Carry out it is quiet stop paying out gas, examination body is moved into steam pressure reaction kettle after gas pending and carries out steam press maintenance, conservation system is divided into five
Stage: the first stage is no pressure gas.The vent valve of steam pressure reaction kettle is opened, is carried out without pressure air, water steams in kettle at this time
Steam pressure is 0MPa.The heat supply into kettle, temperature in the kettle are started to warm up from room temperature, close vent valve after rising to 100 DEG C, continue to supply
Heat, water vapour pressure rises to 0.5MPa from 0MPa in steam pressure reaction kettle, and temperature rises to 168 DEG C from 100 DEG C at this time, it is time-consuming about
40min；Second stage be the constant temperature and pressure stage, in kettle water vapor pressure be 168 DEG C of 0.5MPa(, that is, temperature in the kettle) condition
Lower constant pressure 1h；Phase III continues increasing temperature and pressure, so that water vapor pressure in kettle is risen to 1.1MPa, corresponding temperature is in kettle at this time
194℃；Fourth stage continues to constant temperature and pressure stage (1.1MPa, 194 DEG C), i.e., water vapor pressure is 1.1MPa in kettle
Constant pressure 6h is maintained under conditions of (i.e. 194 DEG C of temperature in the kettle)；5th stage pressure reduction temperature-fall period stops supplying into steam pressure reaction kettle
Heat makes in kettle water vapor pressure drop to 0MPa by 1.1MPa.Then, vent valve is opened, examination body is taken out after waiting gas to be discharged, most
Afterwards, the examination body after steam press maintenance is moved into 50 DEG C of drying boxes after drying to constant weight and is taken out to get the steam pressurized coagulation of the present invention
Soil.
Embodiment 3
A kind of steam-pressing aero-concrete construction material, the quality proportioning of each raw material are as follows:
52 parts of graphite tailing, 17 parts of cement, 28 parts of quick lime, 3 parts of ardealite.Its calcium silicon ratio be 0.8,0.1 part of foaming agent aluminium powder,
Ratio of water to material is 0.6；The percentage is mass percent.
The graphite tailing powder specific surface area is not less than 450 m2/ kg, fineness are to tail over not in 0.080mm square hole screen
Greater than 8%, the cement uses the cement for meeting 32.5 strength grades of " common portland cement " (GB175-2007) specification,
The quick lime grade is II grade and the above quick lime, CaSO in the ardealite4·2H2O content is not less than 75%.
A kind of steam-pressing aero-concrete material the preparation method comprises the following steps:
Heating water to water temperature with thermostat water bath first, to reach 50 DEG C or so spare, then by the graphite tailing, quick lime, water
Mud, ardealite are put into agitated kettle according to 52 parts, 28 parts, 17 parts, 3 parts is stirred 1min, and 50 DEG C or so of heat is then added
Water, 1min is to uniform for stirring, then pours into 0.1 part of aluminium powder and is stirred together, stops stirring, the slurry that will be stirred after 1min
Body pours into die trial, pours depth about at the 3/4 of mold height, then by the mold poured be put into 50 DEG C of drying boxes into
Row is quiet to stop paying out gas, moves into steam pressure reaction kettle examination body after gas pending and carries out steam press maintenance, conservation system is divided into five ranks
Section: the first stage is no pressure gas.The vent valve of steam pressure reaction kettle is opened, is carried out without pressure air, at this time water vapour in kettle
Pressure is 0MPa.The heat supply into kettle, temperature in the kettle are started to warm up from room temperature, close vent valve after rising to 100 DEG C, continue to supply
Heat, water vapour pressure rises to 0.5MPa from 0MPa in steam pressure reaction kettle, and temperature rises to 168 DEG C from 100 DEG C at this time, it is time-consuming about
40min；Second stage be the constant temperature and pressure stage, in kettle water vapor pressure be 168 DEG C of 0.5MPa(, that is, temperature in the kettle) condition
Lower constant pressure 1h；Phase III continues increasing temperature and pressure, so that water vapor pressure in kettle is risen to 1.1MPa, corresponding temperature is in kettle at this time
194℃；Fourth stage continues to constant temperature and pressure stage (1.1MPa, 194 DEG C), i.e., water vapor pressure is 1.1MPa in kettle
Constant pressure 6h is maintained under conditions of (i.e. 194 DEG C of temperature in the kettle)；5th stage pressure reduction temperature-fall period stops supplying into steam pressure reaction kettle
Heat makes in kettle water vapor pressure drop to 0MPa by 1.1MPa.Then, vent valve is opened, examination body is taken out after waiting gas to be discharged, most
Afterwards, the examination body after steam press maintenance is moved into 50 DEG C of drying boxes after drying to constant weight and is taken out to get the steam pressurized coagulation of the present invention
Soil.
Embodiment 4
A kind of steam-pressing aero-concrete construction material, the quality proportioning of each raw material are as follows:
50 parts of graphite tailing, 17 parts of cement, 30 parts of quick lime, 3 parts of ardealite.Its calcium silicon ratio be 0.9,0.1 part of foaming agent aluminium powder,
Ratio of water to material is 0.6；The percentage is mass percent.
The graphite tailing powder specific surface area is not less than 450 m2/ kg, fineness are to tail over not in 0.080mm square hole screen
Greater than 8%, the cement uses the cement for meeting 32.5 strength grades of " common portland cement " (GB175-2007) specification,
The quick lime grade is II grade and the above quick lime, CaSO in the ardealite4·2H2O content is not less than 75%.
A kind of steam-pressing aero-concrete material the preparation method comprises the following steps:
Heating water to water temperature with thermostat water bath first, to reach 50 DEG C or so spare, then by the graphite tailing, quick lime, water
Mud, ardealite are put into agitated kettle according to 50 parts, 30 parts, 17 parts, 3 parts is stirred 1min, and 50 DEG C or so of heat is then added
Water, 1min is to uniform for stirring, then pours into 0.1 part of aluminium powder and is stirred together, stops stirring, the slurry that will be stirred after 1min
Body pours into die trial, pours depth about at the 3/4 of mold height, then by the mold poured be put into 50 DEG C of drying boxes into
Row is quiet to stop paying out gas, moves into steam pressure reaction kettle examination body after gas pending and carries out steam press maintenance, conservation system is divided into five ranks
Section: the first stage is no pressure gas.The vent valve of steam pressure reaction kettle is opened, is carried out without pressure air, at this time water vapour in kettle
Pressure is 0MPa.The heat supply into kettle, temperature in the kettle are started to warm up from room temperature, close vent valve after rising to 100 DEG C, continue to supply
Heat, water vapour pressure rises to 0.5MPa from 0MPa in steam pressure reaction kettle, and temperature rises to 168 DEG C from 100 DEG C at this time, it is time-consuming about
40min；Second stage be the constant temperature and pressure stage, in kettle water vapor pressure be 168 DEG C of 0.5MPa(, that is, temperature in the kettle) condition
Lower constant pressure 1h；Phase III continues increasing temperature and pressure, so that water vapor pressure in kettle is risen to 1.2MPa, corresponding temperature is in kettle at this time
196℃；Fourth stage continues to constant temperature and pressure stage (1.2MPa, 196 DEG C), i.e., water vapor pressure is 1.2MPa in kettle
Constant pressure 6h is maintained under conditions of (i.e. 196 DEG C of temperature in the kettle)；5th stage pressure reduction temperature-fall period stops supplying into steam pressure reaction kettle
Heat makes in kettle water vapor pressure drop to 0MPa by 1.2MPa.Then, vent valve is opened, examination body is taken out after waiting gas to be discharged, most
Afterwards, the examination body after steam press maintenance is moved into 50 DEG C of drying boxes after drying to constant weight and is taken out to get the steam pressurized coagulation of the present invention
Soil.
Compression strength, the dry density for detecting its test block of steam-pressing aero-concrete material respectively, the results are shown in Table 1:
1 case study on implementation test data of table
Claims (8)
1. a kind of preparation method of steam-pressing aero-concrete, which is characterized in that be prepared in accordance with the following methods:
(1) graphite tailing, quick lime, cement, ardealite are added after water is preheated to 45-55 DEG C to stir evenly, pours into aluminium powder, again
Stirring pours into mold after forming slurry；
(2) mold that step (1) has poured is put into 45-55 DEG C of drying box carry out it is quiet stop paying out gas, will examination after gas pending
Body moves into steam pressure reaction kettle and carries out steam press maintenance；
(3) after the completion of conserving, vent valve is opened, examination body is taken out after waiting gas to be discharged, the examination body after steam press maintenance is moved into drying box
It is interior to take out to get steam-pressing aero-concrete after drying to constant weight.
2. the preparation method of steam-pressing aero-concrete according to claim 1, which is characterized in that the mass fraction of each raw material
It is as follows: 50 ~ 64 parts of graphite tailing powder, 14 ~ 17 parts of cement, 19-30 parts of quick lime, 2-5 parts of ardealite, 0.1~0.14 part of aluminium powder.
3. the preparation method of steam-pressing aero-concrete according to claim 2, which is characterized in that calcium oxide and oxygen in raw material
The mass ratio of SiClx is 0.5 ~ 0.9:1, and ratio of water to material is 0.6 ~ 0.65:1.
4. the preparation method of steam-pressing aero-concrete according to claim 1, which is characterized in that the graphite tailing powder
Middle SiO2Content is not less than 50%, and specific surface area is not less than 450m2/ kg, fineness are to tail over to be not more than in 0.080mm square hole screen
8%。
5. the preparation method of steam-pressing aero-concrete according to claim 1, which is characterized in that in the ardealite
CaSO4·2H2O content is not less than 75%.
6. the preparation method of steam-pressing aero-concrete according to claim 1, which is characterized in that the cement, which uses, to be met
The cement of 32.5 strength grades of " common portland cement " (GB175-2007) specification.
7. the preparation method of steam-pressing aero-concrete according to claim 1, which is characterized in that described quick lime use etc.
Grade is II grade and the above quick lime.
8. the preparation method of steam-pressing aero-concrete according to claim 1, which is characterized in that in the step (3)
Conservation system is divided into five stages: the first stage is no pressure gas, and water vapor pressure in steam pressure reaction kettle is controlled as 0MPa, to
Heat supply in kettle, temperature in the kettle are started to warm up from room temperature, close vent valve after rising to 100 DEG C, continue heat supply, in steam pressure reaction kettle
Water vapour pressure rises to 0.45-0.5MPa from 0MPa, and temperature rises to 160-170 DEG C from 100 DEG C at 35-45min；
Second stage is constant temperature and pressure stage, the item that water vapor pressure is 0.45-0.5MPa in kettle, temperature is 160-170 DEG C
Constant pressure 0.8-1.5h under part；
Phase III continues increasing temperature and pressure, so that water vapor pressure in kettle is risen to 1.1-1.2MPa, corresponding temperature is in kettle at this time
190-200℃；
Fourth stage continues to constant temperature and pressure stage 1.1-1.2MPa, maintains constant pressure 5-6h under conditions of 190-200 DEG C；
5th stage pressure reduction temperature-fall period stops the heat supply into steam pressure reaction kettle, makes in kettle water vapor pressure by 1.1-1.2MPa
Drop to 0MPa.
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| CN111138129A (en) * | 2019-12-30 | 2020-05-12 | 四川欧迅能源工程科技有限公司 | Preparation process of novel green building material |
| CN111362651A (en) * | 2020-04-03 | 2020-07-03 | 沈阳促晋科技有限公司 | High-performance autoclaved aerated concrete block prepared from graphite tailings and phosphorus tailings and preparation method thereof |
| CN111454021A (en) * | 2020-04-09 | 2020-07-28 | 青岛吉翔通装备科技有限公司 | Graphite slag high-strength building brick and preparation method thereof |
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| CN111454021A (en) * | 2020-04-09 | 2020-07-28 | 青岛吉翔通装备科技有限公司 | Graphite slag high-strength building brick and preparation method thereof |
| CN111635187A (en) * | 2020-05-13 | 2020-09-08 | 山东领军科技集团有限公司 | Graphite slag light partition plate and preparation method thereof |
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Application publication date: 20190122 |