CN110183242A - Industrial Solid Waste processes high-performance foam ceramic material production technology - Google Patents
Industrial Solid Waste processes high-performance foam ceramic material production technology 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
- 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
- C04B33/1328—Waste materials; Refuse; Residues without additional clay
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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
- C04B33/135—Combustion residues, e.g. fly ash, incineration waste
- C04B33/1352—Fuel ashes, e.g. fly ash
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- 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
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/52—Constituents or additives characterised by their shapes
- C04B2235/5208—Fibers
- C04B2235/5216—Inorganic
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
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- Structural Engineering (AREA)
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- Processing Of Solid Wastes (AREA)
Abstract
The embodiment of the invention discloses Industrial Solid Wastes to process high-performance foam ceramic material production technology, comprising the following steps: proportionally mixes coal chemical industry waste residue, flyash, spoil and glass fibre, is sent into calciner and is calcined；Said mixture is sent in ball mill and is ground, and the mixture after grinding is sieved and collects sieving powder；Above-mentioned sieving powder is put into stirring pool, suitable quantity of water is put into, and proportionally add foaming agent, stands after mixing evenly, it is spare；Toughener is proportionally put into above-mentioned stirring pool, and continues to be stirred into slurry, stand for standby use；Slurry is injected into die trial, moulding by casting, room temperature stands, demoulds after molding；The foam ceramic material of above-mentioned shaping and demoulding is sent in calciner and is calcined, up to product after cooling.The production stage that the present invention produces foam ceramic material is simple and quick, in the case where guaranteeing product quality, saves preparation time, improves economic benefit.
Description
Technical field
The present embodiments relate to new material technology fields, and in particular to Industrial Solid Waste processes high-performance foam ceramic material
Production technology.
Background technique
In recent years, foamed ceramics had been applied in construction and decoration field as a kind of New Building Materials.It is mainly answered
With in the projects such as high-end office building, villa, since its low output, cost are high, cause price higher, therefore, it is difficult to apply
On ordinary residence and house decoration.To which foam ceramic material is as a kind of new material, before also having a vast market
Scape.
In the prior art, the production of foam ceramic material mainly using addition pore creating material method, Self-propagating High-temperature Synthesis Process,
Sol-gel preparation process, ceramic slurry foam process, organic foam plastic impregnation technology etc..The production stage of prior art
Relatively complicated, using energy source is more, is unfavorable for reducing production cost and improves working efficiency.
The production stage that the present invention produces foam ceramic material is simple and quick, in the case where guaranteeing product quality, saves
Preparation time, improves economic benefit.
Therefore, how to be base using existing solid waste, a kind of efficiently quickly life of high-performance foam material is provided
Production technology is those skilled in the art's technical problem urgently to be resolved.
Summary of the invention
For this purpose, the embodiment of the present invention, which provides Industrial Solid Waste, processes high-performance foam ceramic material production technology, it is existing to solve
There is technical problem present in technology.
To achieve the goals above, the embodiment of the present invention provides the following technical solutions:
According to a first aspect of the embodiments of the present invention, Industrial Solid Waste processes high-performance foam ceramic material production technology, packet
Include following steps:
Step 1: proportionally by coal chemical industry waste residue, flyash, spoil and glass fibre mix, be sent into calciner in into
Row calcining, calcined mixture natural cooling are spare；
Step 2: said mixture being sent in ball mill and is ground, and simultaneously by the mixture sieving after grinding
Collect sieving powder；
Step 3: above-mentioned sieving powder being put into stirring pool, suitable quantity of water is put into, and proportionally add foaming agent, stirs
It is stood after mixing uniformly, it is spare；
Step 4: proportionally putting into toughener in Xiang Shangshu stirring pool, and continue to be stirred into slurry, stand for standby use；
Step 5: slurry being injected into die trial, moulding by casting, room temperature stands 12-24 hours, demoulds after molding；
Step 6: the foam ceramic material of above-mentioned shaping and demoulding being sent in calciner and is calcined, after cooling to obtain the final product
Product.
Further, in the step 1, the calcination temperature of coal chemical industry waste residue, flyash, spoil and mixture of glass fibers
It is 1000-1200 DEG C, calcination time is 2-3 hours.
Further, in the step 2, the milling time of ball mill is 1-2 hours, and the granularity for the powder that is sieved is 200-
400 mesh.
Further, in the step 3, speed of agitator is 200-300 revs/min, and mixing time is 1-1.5 hours, is stirred
Mixing rear time of repose is 8-12 hours.
Further, in the step 4, speed of agitator is 150-200 revs/min, and mixing time is 10-30 minutes, is stirred
Mixing rear time of repose is 1-2 hours.
Further, in the step 6, foam ceramic material calcination temperature is 1100-1250 DEG C, calcination time 2-3
Hour.
The embodiment of the present invention has the advantages that
Foam ceramic material production technology of the invention, production stage is few, simple and quick, saves preparation time, mentions
High working efficiency；Calcination temperature wants low compared to the prior art, and the capital equipment applied in production stage is less, to reduce
The usage amount of the energy, reduces the cost of production to a certain extent, increases economic efficiency；Material in this production technology simultaneously
Expect that main body using solid waste such as coal chemical industry waste residue, flyash, reduces the pollution of solid waste, realizes recycling and resource
Change and recycles.
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book is understood other advantages and efficacy of the present invention easily, it is clear that described embodiment is the present invention one
Section Example, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
According to embodiments of the present invention, a kind of Industrial Solid Waste processing high-performance foam ceramic material production technology, packet are provided
Include following steps:
Step 1: proportionally by coal chemical industry waste residue, flyash, spoil and glass fibre mix, be sent into calciner in into
Row calcining, calcined mixture natural cooling are spare；Coal chemical industry waste residue, flyash, spoil and mixture of glass fibers are forged
Burning temperature is 1000-1200 DEG C, and calcination time is 2-3 hours.
Step 2: said mixture being sent in ball mill and is ground, and simultaneously by the mixture sieving after grinding
Collect sieving powder；The milling time of ball mill is 1-2 hours, and the granularity for the powder that is sieved is 200-400 mesh.
Step 3: above-mentioned sieving powder being put into stirring pool, suitable quantity of water is put into, and proportionally add foaming agent, stirs
It is stood after mixing uniformly, it is spare；Speed of agitator is 200-300 revs/min, and mixing time is 1-1.5 hours, time of repose after stirring
It is 8-12 hours.
Step 4: proportionally putting into toughener in Xiang Shangshu stirring pool, and continue to be stirred into slurry, stand for standby use；
Speed of agitator is 150-200 revs/min, and mixing time is 10-30 minutes, and time of repose is 1-2 hours after stirring.
Step 5: slurry being injected into die trial, moulding by casting, room temperature stands 12-24 hours, demoulds after molding；
Step 6: the foam ceramic material of above-mentioned shaping and demoulding being sent in calciner and is calcined, after cooling to obtain the final product
Product.Foam ceramic material calcination temperature is 1100-1250 DEG C, and calcination time is 2-3 hours.
Embodiment 1
Industrial Solid Waste processes high-performance foam ceramic material production technology, comprising the following steps:
Step 1: proportionally by coal chemical industry waste residue, flyash, spoil and glass fibre mix, be sent into calciner in into
Row calcining, calcined mixture natural cooling are spare；Coal chemical industry waste residue, flyash, spoil and mixture of glass fibers are forged
Burning temperature is 1000 DEG C, and calcination time is 3 hours.
Step 2: said mixture being sent in ball mill and is ground, and simultaneously by the mixture sieving after grinding
Collect sieving powder；The milling time of ball mill is 2 hours, and the granularity for the powder that is sieved is 400 mesh.
Step 3: above-mentioned sieving powder being put into stirring pool, suitable quantity of water is put into, and proportionally add foaming agent, stirs
It is stood after mixing uniformly, it is spare；Speed of agitator is 300 revs/min, and mixing time is 1.5 hours, and time of repose is 12 small after stirring
When.
Step 4: proportionally putting into toughener in Xiang Shangshu stirring pool, and continue to be stirred into slurry, stand for standby use；
Speed of agitator is 150 revs/min, and mixing time is 10 minutes, and time of repose is 2 hours after stirring.
Step 5: slurry being injected into die trial, moulding by casting, room temperature stands 24 hours, demoulds after molding；
Step 6: the foam ceramic material of above-mentioned shaping and demoulding being sent in calciner and is calcined, after cooling to obtain the final product
Product.Foam ceramic material calcination temperature is 1100 DEG C, and calcination time is 3 hours.
With coal chemical industry waste residue etc. for base, by above-mentioned production technology, high performance foam ceramic material, Neng Gouyong are obtained
In multiple fields such as buildings.
Embodiment 2
Industrial Solid Waste processes high-performance foam ceramic material production technology, comprising the following steps:
Step 1: proportionally by coal chemical industry waste residue, flyash, spoil and glass fibre mix, be sent into calciner in into
Row calcining, calcined mixture natural cooling are spare；Coal chemical industry waste residue, flyash, spoil and mixture of glass fibers are forged
Burning temperature is 1200 DEG C, and calcination time is 2 hours.
Step 2: said mixture being sent in ball mill and is ground, and simultaneously by the mixture sieving after grinding
Collect sieving powder；The milling time of ball mill is 2 hours, and the granularity for the powder that is sieved is 200 mesh.
Step 3: above-mentioned sieving powder being put into stirring pool, suitable quantity of water is put into, and proportionally add foaming agent, stirs
It is stood after mixing uniformly, it is spare；Speed of agitator is 300 revs/min, and mixing time is 1 hour, and time of repose is 8 hours after stirring.
Step 4: proportionally putting into toughener in Xiang Shangshu stirring pool, and continue to be stirred into slurry, stand for standby use；
Speed of agitator is 200 revs/min, and mixing time is 15 minutes, and time of repose is 1 hour after stirring.
Step 5: slurry being injected into die trial, moulding by casting, room temperature stands 18 hours, demoulds after molding；
Step 6: the foam ceramic material of above-mentioned shaping and demoulding being sent in calciner and is calcined, after cooling to obtain the final product
Product.Foam ceramic material calcination temperature is 1100 DEG C, and calcination time is 2 hours.
With coal chemical industry waste residue etc. for base, by above-mentioned production technology, high performance foam ceramic material, Neng Gouyong are obtained
In multiple fields such as buildings.
Embodiment 3
Industrial Solid Waste processes high-performance foam ceramic material production technology, comprising the following steps:
Step 1: proportionally by coal chemical industry waste residue, flyash, spoil and glass fibre mix, be sent into calciner in into
Row calcining, calcined mixture natural cooling are spare；Coal chemical industry waste residue, flyash, spoil and mixture of glass fibers are forged
Burning temperature is 1200 DEG C, and calcination time is 3 hours.
Step 2: said mixture being sent in ball mill and is ground, and simultaneously by the mixture sieving after grinding
Collect sieving powder；The milling time of ball mill is 1 hour, and the granularity for the powder that is sieved is 200 mesh.
Step 3: above-mentioned sieving powder being put into stirring pool, suitable quantity of water is put into, and proportionally add foaming agent, stirs
It is stood after mixing uniformly, it is spare；Speed of agitator is 250 revs/min, and mixing time is 1 hour, and time of repose is 12 small after stirring
When.
Step 4: proportionally putting into toughener in Xiang Shangshu stirring pool, and continue to be stirred into slurry, stand for standby use；
Speed of agitator is 200 revs/min, and mixing time is 30 minutes, and time of repose is 1 hour after stirring.
Step 5: slurry being injected into die trial, moulding by casting, room temperature stands 24 hours, demoulds after molding；
Step 6: the foam ceramic material of above-mentioned shaping and demoulding being sent in calciner and is calcined, after cooling to obtain the final product
Product.Foam ceramic material calcination temperature is 1250 DEG C, and calcination time is 2 hours.
With coal chemical industry waste residue etc. for base, by above-mentioned production technology, high performance foam ceramic material, Neng Gouyong are obtained
In multiple fields such as buildings.
Embodiment 4
Industrial Solid Waste processes high-performance foam ceramic material production technology, comprising the following steps:
Step 1: proportionally by coal chemical industry waste residue, flyash, spoil and glass fibre mix, be sent into calciner in into
Row calcining, calcined mixture natural cooling are spare；Coal chemical industry waste residue, flyash, spoil and mixture of glass fibers are forged
Burning temperature is 1200 DEG C, and calcination time is 2 hours.
Step 2: said mixture being sent in ball mill and is ground, and simultaneously by the mixture sieving after grinding
Collect sieving powder；The milling time of ball mill is 1.5 hours, and the granularity for the powder that is sieved is 200 mesh.
Step 3: above-mentioned sieving powder being put into stirring pool, suitable quantity of water is put into, and proportionally add foaming agent, stirs
It is stood after mixing uniformly, it is spare；Speed of agitator is 300 revs/min, and mixing time is 1 hour, and time of repose is 12 small after stirring
When.
Step 4: proportionally putting into toughener in Xiang Shangshu stirring pool, and continue to be stirred into slurry, stand for standby use；
Speed of agitator is 180 revs/min, and mixing time is 10 minutes, and time of repose is 1 hour after stirring.
Step 5: slurry being injected into die trial, moulding by casting, room temperature stands 12 hours, demoulds after molding；
Step 6: the foam ceramic material of above-mentioned shaping and demoulding being sent in calciner and is calcined, after cooling to obtain the final product
Product.Foam ceramic material calcination temperature is 1250 DEG C, and calcination time is 2 hours.
With coal chemical industry waste residue etc. for base, by above-mentioned production technology, high performance foam ceramic material, Neng Gouyong are obtained
In multiple fields such as buildings.
Embodiment 5
Industrial Solid Waste processes high-performance foam ceramic material production technology, comprising the following steps:
Step 1: proportionally by coal chemical industry waste residue, flyash, spoil and glass fibre mix, be sent into calciner in into
Row calcining, calcined mixture natural cooling are spare；Coal chemical industry waste residue, flyash, spoil and mixture of glass fibers are forged
Burning temperature is 1200 DEG C, and calcination time is 2.5 hours.
Step 2: said mixture being sent in ball mill and is ground, and simultaneously by the mixture sieving after grinding
Collect sieving powder；The milling time of ball mill is 1 hour, and the granularity for the powder that is sieved is 200 mesh.
Step 3: above-mentioned sieving powder being put into stirring pool, suitable quantity of water is put into, and proportionally add foaming agent, stirs
It is stood after mixing uniformly, it is spare；Speed of agitator is 300 revs/min, and mixing time is 1 hour, and time of repose is 12 small after stirring
When.
Step 4: proportionally putting into toughener in Xiang Shangshu stirring pool, and continue to be stirred into slurry, stand for standby use；
Speed of agitator is 150 revs/min, and mixing time is 10 minutes, and time of repose is 1 hour after stirring.
Step 5: slurry being injected into die trial, moulding by casting, room temperature stands 18 hours, demoulds after molding；
Step 6: the foam ceramic material of above-mentioned shaping and demoulding being sent in calciner and is calcined, after cooling to obtain the final product
Product.Foam ceramic material calcination temperature is 1200 DEG C, and calcination time is 2 hours.
With coal chemical industry waste residue etc. for base, by above-mentioned production technology, high performance foam ceramic material, Neng Gouyong are obtained
In multiple fields such as buildings.
Embodiment 6
Industrial Solid Waste processes high-performance foam ceramic material production technology, comprising the following steps:
Step 1: proportionally by coal chemical industry waste residue, flyash, spoil and glass fibre mix, be sent into calciner in into
Row calcining, calcined mixture natural cooling are spare；Coal chemical industry waste residue, flyash, spoil and mixture of glass fibers are forged
Burning temperature is 1100 DEG C, and calcination time is 2 hours.
Step 2: said mixture being sent in ball mill and is ground, and simultaneously by the mixture sieving after grinding
Collect sieving powder；The milling time of ball mill is 1.5 hours, and the granularity for the powder that is sieved is 400 mesh.
Step 3: above-mentioned sieving powder being put into stirring pool, suitable quantity of water is put into, and proportionally add foaming agent, stirs
It is stood after mixing uniformly, it is spare；Speed of agitator is 200 revs/min, and mixing time is 1 hour, and time of repose is 12 small after stirring
When.
Step 4: proportionally putting into toughener in Xiang Shangshu stirring pool, and continue to be stirred into slurry, stand for standby use；
Speed of agitator is 150 revs/min, and mixing time is 10 minutes, and time of repose is 1 hour after stirring.
Step 5: slurry being injected into die trial, moulding by casting, room temperature stands 20 hours, demoulds after molding；
Step 6: the foam ceramic material of above-mentioned shaping and demoulding being sent in calciner and is calcined, after cooling to obtain the final product
Product.Foam ceramic material calcination temperature is 1200 DEG C, and calcination time is 2 hours.
Therefore, the above embodiments are only that part preferred embodiment of the invention in practical applications can be according to client
To the performance requirement of foam ceramic material, the partial parameters in production technology are adjusted.
The embodiment of the present invention has the advantages that
Foam ceramic material production technology of the invention, production stage is few, simple and quick, saves preparation time, mentions
High working efficiency；Calcination temperature wants low compared to the prior art, and the capital equipment applied in production stage is less, to reduce
The usage amount of the energy, reduces the cost of production to a certain extent, increases economic efficiency；Material in this production technology simultaneously
Expect that main body using solid waste such as coal chemical industry waste residue, flyash, reduces the pollution of solid waste, realizes recycling and resource
Change and recycles.
Although above having used general explanation and specific embodiment, the present invention is described in detail, at this
On the basis of invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Therefore,
These modifications or improvements without departing from theon the basis of the spirit of the present invention are fallen within the scope of the claimed invention.
Claims (6)
1. Industrial Solid Waste processes high-performance foam ceramic material production technology, which comprises the following steps:
Step 1: proportionally coal chemical industry waste residue, flyash, spoil and glass fibre being mixed, is sent into calciner and is forged
It burns, calcined mixture natural cooling is spare；
Step 2: said mixture being sent in ball mill and is ground, and the mixture after grinding is sieved and is collected
Be sieved powder；
Step 3: above-mentioned sieving powder being put into stirring pool, is put into suitable quantity of water, and proportionally add foaming agent, stirring is equal
It is stood after even, it is spare；
Step 4: proportionally putting into toughener in Xiang Shangshu stirring pool, and continue to be stirred into slurry, stand for standby use；
Step 5: slurry being injected into die trial, moulding by casting, room temperature stands 12-24 hours, demoulds after molding；
Step 6: the foam ceramic material of above-mentioned shaping and demoulding being sent in calciner and is calcined, is produced to obtain the final product after cooling
Product.
2. Industrial Solid Waste as described in claim 1 processes high-performance foam ceramic material production technology, which is characterized in that described
In step 1, coal chemical industry waste residue, flyash, spoil and mixture of glass fibers calcination temperature be 1000-1200 DEG C, when calcining
Between be 2-3 hours.
3. Industrial Solid Waste as described in claim 1 processes high-performance foam ceramic material production technology, which is characterized in that described
In step 2, the milling time of ball mill is 1-2 hours, and the granularity for the powder that is sieved is 200-400 mesh.
4. Industrial Solid Waste as described in claim 1 processes high-performance foam ceramic material production technology, which is characterized in that described
In step 3, speed of agitator is 200-300 revs/min, and mixing time is 1-1.5 hours, and time of repose is that 8-12 is small after stirring
When.
5. Industrial Solid Waste as described in claim 1 processes high-performance foam ceramic material production technology, which is characterized in that described
In step 4, speed of agitator is 150-200 revs/min, and mixing time is 10-30 minutes, and time of repose is 1-2 hours after stirring.
6. Industrial Solid Waste as described in claim 1 processes high-performance foam ceramic material production technology, which is characterized in that described
In step 6, foam ceramic material calcination temperature is 1100-1250 DEG C, and calcination time is 2-3 hours.
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Application publication date: 20190830 |