CN106554162B - The manufacturing method of light weight aggregate - Google Patents
The manufacturing method of light weight aggregate Download PDFInfo
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- CN106554162B CN106554162B CN201610112384.5A CN201610112384A CN106554162B CN 106554162 B CN106554162 B CN 106554162B CN 201610112384 A CN201610112384 A CN 201610112384A CN 106554162 B CN106554162 B CN 106554162B
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- granules
- light weight
- kneading machine
- aggregate
- manufacturing
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
- C04B18/027—Lightweight materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/04—Heat treatment
-
- 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)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing Of Solid Wastes (AREA)
- Glanulating (AREA)
Abstract
The present invention provides a kind of manufacturing method of light weight aggregate; even being granulated in the kneading machine of batch processing formula and forming a granules; and a case where granules have been subjected to granulation in rotating pelletizer, it can also prevent from generating block-like secondary granulation object (raw pellet).A kind of manufacturing method of light weight aggregate, it is characterized in that, including following process: being kneaded powdered aggregate raw material (FA1) and water using the kneading machine (3) of batch processing formula, obtain a granulating working procedure an of granules (5);The process for supplying a granules to rotation pelletizer (8);A granules (5) is subjected to rotation granulation in rotation pelletizer (8), obtains the secondary granulation process of the life pellet (9) as secondary granulation object;With by the raw pellet (9), the process for obtaining light weight aggregate, before it a granules (5) will be discharged from the kneading machine (3), powdered aggregate raw material (FA2) is supplied to the kneading machine (3), and powdered aggregate raw material is made to be attached to the surface of a granules (5).
Description
Technical field
The present invention relates to be granulated, be sintered to manufacture the side of light weight aggregate for raw material with flying dust (fly ash) etc.
Method.
Background technique
In the past, from all a large amount of real estates such as coal fired boiler discharge, the flying dust generated and the burning ashs generated from burning facility
It is raw, therefore need to be recycled to seek as resource reutilization when making the equipment for generating these substances work.
Therefore, in order to once carry out following work using flying dust and burning ash as utilization of resources, that is, by these
Substance manually manufactures light weight aggregate as main material.
Fig. 3 shows the method by flying dust manufacture light weight aggregate recorded in patent document 1.
It is incited somebody to action from hopper 2 by low-gravity agent, from hopper 3 by foaming agent, from hopper 4 from hopper 1 by flying dust, according further to needs
Coal dust is supplied respectively as raw material to kneading machine 5.5 ' mixed raw material of water is injected in kneading machine 5 and obtains mixture.This is mixed
Refining 6 size degradation of object disintegrator and after obtaining a granules, supplied with belt feeder 7 a certain amount of, made on one side with dish-type on one side
Grain machine 8 is granulated, and the life pellet 9 as secondary granulation object is obtained.
Then, in the mobile firing machine 12 of the linear type of a spontaneous combustion accepted way of doing sth, weight feed gives birth to pellet 9 on fire grate 21, should
Raw pellet is moved with fire grate 21.High hot-air is supplied into each furnace 22,23,24 from hot air pipe 28.Utilize drying and preheating
Furnace 22 carries out the drying of raw pellet, then, the not coal-fired kindling in dried granules is made in ignition furnace 23.In turn, burning is utilized
Knot thermal protection furnace 24 shifts the unburned burning of coal in dried granules downwards, completes whole sintering.
Pellet is sintered in cooled region 29 by making a part for sucking air of air blower 27 in the layer of sintering pellet
In downward (arrow C in figure) pass through it is cooled.The pellet block being cooled is fed to by sliding slot (chute) 30
It is separated in crusher 31, the screening of pellet screen(ing) machine 32 separated is the product pellet of regulation shape, becomes light weight aggregate.
In Fig. 3,25 be the bellows that upper end is open towards fire grate 21, and 26 are arranged in the lower end of the bellows 25 and the suction with air blower 27
Enter the gas exhaust piping of side connection.
Citation
Patent document
Patent document 1: Japanese Patent No. 3892545
Summary of the invention
Method described in Patent Document 1 is that a granules are obtained using the process in two stages, that is, uses kneading machine
5 obtain mixture, by obtained mixture 6 size degradation of disintegrator.
The present inventor has attempted following methods to carry out the process for obtaining a granules with stage, that is,
Raw material and water mixing are obtained into a granules in the kneading machine of batch-type, which are discharged to hopper, is made
It is piled up in hopper, and a granules of accumulation are transplanted in rotation pelletizer, obtains secondary make using rotation pelletizer
Grain object (raw pellet).
But, it is known that: according to this method, will form in rotation pelletizer with collapse and coarse shape it is block-like
Granules.
It is that the present inventor is studied as a result, having obtained following opinion: seen using a granules obtained by the above method
When not moistening, but being compacted in hopper because of self weight up, the moisture of a granules causes a granules to aggregate with one another
And the coarse grain of the shape of collapse is formed, it is formed in the process of secondary granulation object using rotation pelletizer, the coarse grain is each other
It further agglomerates and forms block-like secondary granulation object.
The object of the present invention is to provide the manufacturing methods of light weight aggregate, wherein even in the kneading machine of batch processing formula
Interior granulation forms a granules, and the case where a granules have been carried out granulation in rotating pelletizer, can also prevent
Only generate block-like raw pellet.
The above subject can be solved by the manufacturing method of the light weight aggregate of the invention of following record.
(1) a kind of manufacturing method of light weight aggregate, which is characterized in that including following process:
Powdered aggregate raw material and water are kneaded using the kneading machine of batch processing formula, obtain the primary of a granules
Granulating working procedure;
The process for supplying a granules to rotation pelletizer;
A granules are subjected to rotation granulation in rotation pelletizer, obtain the life pellet as secondary granulation object
Secondary granulation process;With
By the raw pellets sinter, the process for obtaining light weight aggregate,
Before it a granules will be discharged from the kneading machine, powdered aggregate is supplied to the kneading machine
Raw material makes powdered aggregate raw material be attached to the surface of a granules.
(2) manufacturing method of the light weight aggregate according to above-mentioned (1), which is characterized in that supply institute to rotation pelletizer
The process for stating a granules includes following process:
A granules in the kneading machine are discharged in hopper to the process for accumulating it;With
The process that a granules being piled up in the hopper are supplied to rotation pelletizer.
(3) manufacturing method of the light weight aggregate according to above-mentioned (2), which is characterized in that using being configured at below hopper
Belt feeder carry out be piled up in the hopper granules to rotation pelletizer supply.
(4) according to the manufacturing method of described in any item light weight aggregates of above-mentioned (1)~(3), which is characterized in that the powder
The aggregate raw material of last shape is flying dust.
The manufacturing method of light weight aggregate according to the present invention can obtain the light weight aggregate of uniform shapes.
Detailed description of the invention
Fig. 1 is the figure for illustrating the example of manufacturing method of light weight aggregate of the invention.
Fig. 2 is another figure for illustrating the manufacturing method of light weight aggregate of the invention.
Fig. 3 is the figure for illustrating the manufacturing method of previous light weight aggregate.
Description of symbols
(about Fig. 1,2)
1,11,12,13: silo;2: metering device;
21,22,23,24: measuring tank;3: kneading machine;
4: hopper;5: granules;6: belt feeder;
7: scraper plate;8: rotation pelletizer;9: secondary granulation object (raw pellet);
A: added material;R: recycling dust;
FA: flying dust;FA1: flying dust 1;FA2: flying dust 2.
(about Fig. 3)
1,2,3,4: hopper;5: kneading machine;5 ': water;
6: pulverizer;7: belt feeder;8: dish-type granulators;
9: raw pellet;12: the mobile firing machine of the linear type of a spontaneous combustion accepted way of doing sth;
21: fire grate;22: drying and preheating furnace: 23: ignition furnace;
24: sintering thermal protection furnace;25: bellows;26: gas exhaust piping;
27: air blower;28: hot air pipe;29: cooled region;
30: sliding slot;31: crusher;32: screen(ing) machine.
Specific embodiment
Below based on embodiments of the present invention, the present invention will be described in detail, but technical scope of the invention is not following
Embodiment limit.
Based on Fig. 1 and Fig. 2, the case where for flying dust is used as raw material, illustrate the manufacturer of light weight aggregate of the invention
Method.
Firstly, illustrating the embodiment 1 of the manufacturing method of light weight aggregate of the invention by process sequence based on Fig. 1.
(measurement process)
Flying dust in silo 1 is supplied in metering device 2 and is measured.
Specifically, the flying dust (FA) in silo 1 is supplied to the measuring tank 21 of large capacity and the measuring tank 22 of low capacity
In measured.Hereinafter, the flying dust measured with measuring tank 21 is known as flying dust 1 (FA1), fly what is measured with measuring tank 22
Ash is known as flying dust 2 (FA2).
(granulating working procedure)
Then, the flying dust 1 in measuring tank 21 is supplied in the kneading machine 3 of batch processing formula, to being incorporated in kneading machine
Water is added in interior flying dust 1 to be kneaded.
Time as defined in being kneaded, just obtain a granules of specified particle size.Then, will to hopper 4 be discharged this one
Before secondary granules, flying dust 2 is supplied from measuring tank 22 to kneading machine 3, flying dust 2 is mixed into a granules.
Furthermore flying dust 2 can once add, and can dividedly add, and can also continuously add.
Since the flying dust 2 is the state dried, it is attached to the surface of a granules containing moisture, becomes one
The state that the surface of secondary granules is covered by flying dust 2.Moreover, flying dust 2 absorbs the moisture of a granules, becoming once to be made
The state of the dry tack free of grain object.
The additive amount of the flying dust 2 added into kneading machine 3, can be appropriate according to the partial size of a granules as target
Setting.
In addition, as to kneading machine 3 add flying dust 2 opportunity, can according to the processing capacity and mixed performance of kneading machine 3 come
It suitably sets, but as long as can ensure following times, the time is from after addition flying dust 2 until a granules are discharged
Until can make flying dust 2 be attached to throughout ground a granules surface time.
Such as used as kneading machine in the test of DMK-50 (タ イ ガ ー マ シ Application corporation: capacity 50L), pass through
Relative to the flying dust 1 of 100 mass parts, the flying dust 2 of 15 mass parts is added before distance discharge 15 seconds, has obtained good knot
Fruit.
(secondary granulation process)
Then, a granules in kneading machine 3 are expelled to hopper 4.A granules 5 being piled up in hopper 4,
Surface is the state dried, therefore particle is difficult to adhere to each other.
A granules 5 in hopper 4 are supplied using belt feeder 6 to rotation pelletizer 8.Once making in hopper
Grain object limits thickness using scraper plate 7, and falls in rotation pelletizer 8 from transmission band edge.
In Fig. 1, dish-type granulators are shown but it is also possible to be drum type pelletizer as rotation pelletizer 8.
By being rotated while adding water into a granules 5 in rotating pelletizer 8, a granules 5
Cohesion obtains the secondary granulation object (raw pellet) 9 of defined partial size.
(sintering process)
The life pellet 9 being discharged from rotation pelletizer 8 is sintered in sintering process, becomes light weight aggregate.
It is able to use known sintering equipment in sintering process, therefore omits the explanation for sintering equipment.
Then, the embodiment 2 of the manufacturing method of light weight aggregate of the invention is illustrated based on Fig. 2.
Present embodiment 2 is the recycling powder that will also generate in the manufacturing equipment of light weight aggregate other than flying dust (FA)
The embodiment that dirt (R) and additive (A) are used as the raw material of light weight aggregate.
Recycling dust (R) is added to efficiently use the dust generated in system.
As additive (A), coal grain, coke grain that the specific gravity of light weight aggregate can be made to reduce etc. can be used, and/or make light
The particle shape of amount aggregate is easy neat bentonite etc..
Embodiment 2, compared with embodiment 1, only measurement process and a granulating working procedure difference, therefore it is following only right
The measurement process of embodiment 2 and a granulating working procedure are illustrated.
(measurement process)
Flying dust (FA) in silo 11 is supplied in the measuring tank 21 of large capacity and the measuring tank 22 of low capacity and is counted
Amount.
In addition, measuring the recycling dust (R) in silo 12 with measuring tank 23, the addition in silo 13 is measured with measuring tank 24
Agent (A).
(granulating working procedure)
Then, to kneading machine 3 supply measuring tank 21 in flying dust 1 (FA1), the recycling dust (R) in measuring tank 23 and
The full dose of added material (A) in measuring tank 24, adds water into the raw mixture being incorporated in kneading machine 3, is mixed
Refining.
It is kneaded the stipulated time, just obtains a granules of specified particle size.Then, this will be discharged once to hopper 4
Flying dust 2 (FA2) is supplied from measuring tank 22 to kneading machine 3 before granules (for example, before discharge 15 seconds), by flying dust 2
(FA2) it is mixed into a granules.
Embodiment
DMK-50 (タ イ ガ ー マ シ Application corporation) has been used as kneading machine, has used diameter as rotation pelletizer
For the dish-type granulators of 1m.
In addition, used JIS grey (type II) as flying dust, bulk density 0.86.
(embodiment 1)
The water of the flying dust 1 of 10kg and 3.0kg is put into kneading machine.
Then, after with 1000rpm mixing 2 minutes, and then with 200rpm mixing 1 minute.
Then, the flying dust of 3kg 2 is put into kneading machine, with 200rpm mixing 30 seconds, a granules is discharged.
Then, the full dose of a granules is fitted into dish-type granulators, intermittently atomized water spray, has carried out 6 points with 25rpm
The granulation of clock.
The surface hardness of obtained secondary granulation object improves, and does not generate block.
(embodiment 2)
The water of the flying dust 1 of 10kg and 2.9kg is put into kneading machine.
Then, after with 1000rpm mixing 2 minutes, and then with 200rpm mixing 2 minutes.
Then, the flying dust of 1.5kg 2 is put into kneading machine, with 200rpm mixing 15 seconds, a granules is discharged.
Then, the full dose of a granules is fitted into dish-type granulators, intermittently atomized water spray, has carried out 6 points with 25rpm
The granulation of clock.
Without generating block in obtained secondary granulation object.
(embodiment 3)
The water of the flying dust 1 of 10kg and 2.9kg is put into kneading machine.
Then, after with 1000rpm mixing 2 minutes, and then with 200rpm mixing 2 minutes.
Then, the flying dust of 1.5kg 2 is put into kneading machine, with 200rpm mixing 15 seconds, a granules is discharged.
Then, 3 batches of amounts of make of kneading machine granules are continuously put into dish-type granulators, is broken on one side
Continuous ground atomized water spray, has carried out granulation in 20 minutes on one side with 25rpm.
Without generating block in obtained secondary granulation object.In addition, the size of desired granules can be grown into.
(comparative example 1)
The carbon of the flying dust 1 of 10kg and 0.3kg is put into kneading machine, after carrying out mixing in 30 seconds, by the water one of 3.0kg
Implication was put into kneading machine, with 1000rpm mixing 2 minutes.
Then, 2 points are kneaded 30 seconds with 200rpm, a granules is discharged.
Then, the full dose of a granules is fitted into dish-type granulators, is granulated with 25rpm, even if due to not having
There is atomized water spray, surface is also tacky, therefore finishes rotation operation when rotation time is 3 points and 30 seconds.
Obtained secondary granulation object contains the block of big grain and collapse.
(comparative example 2)
The water of the flying dust 1 of 10kg and 2.5kg is put into kneading machine.
Then, with 1000rpm mixing 2 minutes, and then 2 points are kneaded 30 seconds with 200rpm, a granules is discharged.
Then, the full dose of a granules is fitted into dish-type granulators, with while intermittently atomized water spray 25rpm into
4 points of granulations in 50 seconds are gone.
Compared with comparative example 1, reduce the water put into kneading machine, therefore the partial size of a granules becomes smaller, but
Obtained secondary granulation object, surfaces of tacky, and contain the block of big grain and collapse.
The manufacturing method of light weight aggregate of the invention, using the primary granulation made from the discharge of the kneading machine of batch processing formula
Object is piled up in hopper in the case where this process especially effectively, but not limited to this, it can also be using will be discharged from kneading machine
After one time granules are stored in bin for the time being, it is made to be placed in this process on the production line of secondary granulation process.
Claims (4)
1. a kind of manufacturing method of light weight aggregate, which is characterized in that including following process:
Powdered aggregate raw material and water are kneaded using the kneading machine of batch processing formula, obtain the primary granulation an of granules
Process;
The process for supplying a granules to rotation pelletizer;
A granules are subjected to rotation granulation in rotation pelletizer, obtain two of the life pellet as secondary granulation object
Secondary granulating working procedure;With
By the raw pellets sinter, the process for obtaining light weight aggregate,
Before it a granules will be discharged from the kneading machine, it is former that powdered aggregate is supplied to the kneading machine
Material, makes powdered aggregate raw material be attached to the surface of a granules.
2. the manufacturing method of light weight aggregate according to claim 1, which is characterized in that rotation pelletizer supply described one
The process of secondary granules includes following process:
A granules in the kneading machine are discharged in hopper to the process for accumulating it;With
The process that a granules being piled up in the hopper are supplied to rotation pelletizer.
3. the manufacturing method of light weight aggregate according to claim 2, which is characterized in that utilize the band being configured at below hopper
Formula feeder carries out supply of be piled up in the hopper granules to rotation pelletizer.
4. the manufacturing method of described in any item light weight aggregates according to claim 1~3, which is characterized in that described powdered
Aggregate raw material be flying dust.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2015-193235 | 2015-09-30 | ||
JP2015193235A JP2017065971A (en) | 2015-09-30 | 2015-09-30 | Method for producing lightweight aggregate |
Publications (2)
Publication Number | Publication Date |
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CN106554162A CN106554162A (en) | 2017-04-05 |
CN106554162B true CN106554162B (en) | 2019-01-04 |
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CN201610112384.5A Expired - Fee Related CN106554162B (en) | 2015-09-30 | 2016-02-29 | The manufacturing method of light weight aggregate |
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CN (1) | CN106554162B (en) |
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CN115140959B (en) * | 2022-07-26 | 2023-03-14 | 山东大学 | Alkali-sulfur double-excitation multi-shell-layer high-strength baking-free lightweight aggregate and preparation method and application thereof |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB805439A (en) * | 1954-04-09 | 1958-12-03 | Somogyi Francis Paul | Improvements in or relating to the sintering of powdered materials |
CN102481537A (en) * | 2009-03-06 | 2012-05-30 | 莱泰格有限公司 | Sintered lightweight aggregates |
CN102775177A (en) * | 2012-07-13 | 2012-11-14 | 安徽省舒城县盛宏陶粒厂 | Method for firing light-weight haydite |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5370976A (en) * | 1976-12-04 | 1978-06-23 | Fmc Corp | High density of coal fly ash |
JPS59111972A (en) * | 1982-12-17 | 1984-06-28 | 株式会社神戸製鋼所 | Manufacture of lightweight aggregate |
JPH05229858A (en) * | 1992-02-19 | 1993-09-07 | Chugoku Electric Power Co Inc:The | Production of artificial lightweight aggregate |
JP3368365B2 (en) * | 1994-02-16 | 2003-01-20 | 四国電力株式会社 | Composition for artificial lightweight aggregate and method for producing artificial lightweight aggregate |
JP3892545B2 (en) * | 1997-09-11 | 2007-03-14 | 株式会社神戸製鋼所 | Lightweight aggregate manufacturing method |
-
2015
- 2015-09-30 JP JP2015193235A patent/JP2017065971A/en active Pending
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2016
- 2016-02-29 CN CN201610112384.5A patent/CN106554162B/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB805439A (en) * | 1954-04-09 | 1958-12-03 | Somogyi Francis Paul | Improvements in or relating to the sintering of powdered materials |
CN102481537A (en) * | 2009-03-06 | 2012-05-30 | 莱泰格有限公司 | Sintered lightweight aggregates |
CN102775177A (en) * | 2012-07-13 | 2012-11-14 | 安徽省舒城县盛宏陶粒厂 | Method for firing light-weight haydite |
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CN106554162A (en) | 2017-04-05 |
JP2017065971A (en) | 2017-04-06 |
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