CN110451830A - A kind of production technology preparing alpha-semi water plaster stone using the dry stewing method of microwave - Google Patents
A kind of production technology preparing alpha-semi water plaster stone using the dry stewing method of microwave Download PDFInfo
- Publication number
- CN110451830A CN110451830A CN201910879090.9A CN201910879090A CN110451830A CN 110451830 A CN110451830 A CN 110451830A CN 201910879090 A CN201910879090 A CN 201910879090A CN 110451830 A CN110451830 A CN 110451830A
- Authority
- CN
- China
- Prior art keywords
- microwave
- production technology
- plaster stone
- water plaster
- semi water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B11/00—Calcium sulfate cements
- C04B11/02—Methods and apparatus for dehydrating gypsum
-
- 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
- C04B11/00—Calcium sulfate cements
- C04B11/02—Methods and apparatus for dehydrating gypsum
- C04B11/028—Devices therefor characterised by the type of calcining devices used therefor or by the type of hemihydrate obtained
- C04B11/032—Devices therefor characterised by the type of calcining devices used therefor or by the type of hemihydrate obtained for the wet process, e.g. dehydrating in solution or under saturated vapour conditions, i.e. to obtain alpha-hemihydrate
-
- 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
- C04B11/00—Calcium sulfate cements
- C04B11/26—Calcium sulfate cements strating from chemical gypsum; starting from phosphogypsum or from waste, e.g. purification products of smoke
-
- 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
- C04B11/00—Calcium sulfate cements
- C04B11/26—Calcium sulfate cements strating from chemical gypsum; starting from phosphogypsum or from waste, e.g. purification products of smoke
- C04B11/262—Calcium sulfate cements strating from chemical gypsum; starting from phosphogypsum or from waste, e.g. purification products of smoke waste gypsum other than phosphogypsum
- C04B11/264—Gypsum from the desulfurisation of flue gases
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Drying Of Solid Materials (AREA)
Abstract
It is main to turn crystalline substance, microwave drying, broken, storage including pretreatment, microwave heating the invention discloses a kind of production technology for preparing alpha-semi water plaster stone using the dry stewing method of microwave；Wherein, pretreatment is pre-processed to industry by-product gypsum or the natural gypsum, purifies dihydrate gypsum；Microwave heating is that pretreated material is placed in closed container, and microwave field is recycled to heat material；Turning crystalline substance is to be changed under the action of the additives such as crystal modifier in conjunction with crystal habit of the microwave heating to material；Drying is that extra liquid vaporization is discharged and is collected using microwave field continuous heating；It is broken to refer to pockets of material scattering using equipment；Storage be by broken material when certain humidity, temperature sealed storage.The present invention has the advantages that environmental protection, efficient, cost is controllable, can prepare alpha-semi water plaster stone that meet national standards.
Description
Technical field
It is more particularly to a kind of to utilize the dry stewing method preparation α-half of microwave the present invention relates to building material technical field
The production technology of water gypsum.
Background technique
Currently, preparing alpha-semi water plaster stone mostly uses autoclave method or normal pressure salt solustion mehtod, this method low efficiency, energy consumption is high.
Summary of the invention
It is an object of that present invention to provide a kind of production technology that alpha-semi water plaster stone is prepared using the dry stewing method of microwave, technique tools
There is the features such as environmental protection, efficient, cost is controllable.
To achieve the above object, the invention provides the following technical scheme:
A kind of production technology preparing alpha-semi water plaster stone using the dry stewing method of microwave, which is characterized in that the technique is suitable for phosphorus
The by-product gypsums such as gypsum, desulfurized gypsum and the natural gypsum；Turn crystalline substance, microwave drying, broken, storage including pretreatment, microwave heating
Five links.
Preferably, the frequency of the microwave is not less than 2450MHz, and power is not less than 9Kw.
Preferably, the pretreatment: the methods of washing, flotation, lime neutralization can be used, make dihydrate gypsum pH > 6, approach
Neutrality, and without obvious floating impurity.
Preferably, the microwave heating turns crystalline substance: being to carry out in closed environment, due to adding thermogenetic vapor etc. not
Reaction vessel is discharged.
Preferably, the microwave heating turns brilliant reaction temperature control between 120-140 DEG C, and the reaction time controls in 60-
90min。
Preferably, the microwave heating turns tartaric acid, the 0.1-0.5% that crystal modifier used in crystalline substance is 0.5-1.5% volume
Ethylenediamine tetra-acetic acid, the 1-2% calcium oxide of volume.
Preferably, microwave drying is to turn brilliant in microwave heating to take humid air away after the reaction was completed, is then continued to material micro-
Wave heating, dried material.
Preferably, for the control of microwave drying temperature at 60-80 DEG C, the reaction time is about 30-60min.
Preferably, it is described it is broken be to be carried out in closing, dry environment, be using equipment by pockets of material scattering,
Substantially change is not generated to the grain fineness of material.
Preferably, the storage is carried out in the environment of close drying.
It can be seen via above technical scheme that compared with prior art, the present invention makes full use of in Gypsum slurry, aqueous is inhaled
The characteristic of wave, to have temperature uniform, the high advantage of the thermal efficiency using microwave heating.It is dried in addition, turning crystalline substance in completion
When, since gypsum crystal itself does not inhale wave, only aqueous is heated into vapor after inhaling wave, is detached from gypsum crystal, reaches high
Imitate the drying effect of environmental protection.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 attached drawing is process flow of the invention
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Attached drawing 1 is please referred to, embodiment is raw material using ardealite, carries out the preparation of semi-hydrated gypsum, concrete technology stream
Journey includes:
(1) composite pretreating method neutralized using washing with lime makes dihydrate gypsum pH=7 and miscellaneous without obviously floating
Matter；
(2) tartaric acid of 1% volume, the ethylenediamine tetra-acetic acid of 0.5% volume, 1% calcium oxide are added and enters gypsum object
Material, stirs evenly；
(3) slurry is sent into reaction kettle, and starts to carry out turning crystalline substance using microwave heating.Temperature of charge control exists when reaction
130 DEG C, the reaction time controls in 60min；
(4) it after microwave reaction, opens valve and takes humid air away.After the completion of pumping, valve is closed.
Then, continue microwave heating.Microwave reaction temperature is controlled at 80 DEG C, and drying time is about 30min；
(5) will the dry material completed, be sent into closed container, then using equipment by pockets of material scattering, and base
This does not generate change to the grain fineness of material；
(6) material storing for completing processing is in the container of close drying.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part
It is bright.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of production technology for preparing alpha-semi water plaster stone using the dry stewing method of microwave, which is characterized in that the technique is suitable for phosphorus stone
The by-product gypsums such as cream, desulfurized gypsum and the natural gypsum；Turn crystalline substance, microwave drying, broken, storage five including pretreatment, microwave heating
A link.
2. a kind of production technology for being prepared alpha-semi water plaster stone using the dry stewing method of microwave according to claim 1, feature are existed
In the frequency of the microwave is not less than 2450MHz, and power is not less than 9Kw.
3. a kind of production technology for being prepared alpha-semi water plaster stone using the dry stewing method of microwave according to claim 1, feature are existed
In the pretreatment: the methods of washing, flotation, lime neutralization can be used, make dihydrate gypsum pH > 6, close neutrality, and nothing
Obvious floating impurity.
4. a kind of production technology for being prepared alpha-semi water plaster stone using the dry stewing method of microwave according to claim 1, feature are existed
In the microwave heating turns crystalline substance: being to be carried out in closed environment, hold due to adding thermogenetic vapor etc. that reaction is not discharged
Device.
5. a kind of production technology for being prepared alpha-semi water plaster stone using the dry stewing method of microwave according to claim 4, feature are existed
In the microwave heating turns brilliant reaction temperature control between 120-140 DEG C, and the reaction time controls in 60-90min.
6. a kind of production technology for being prepared alpha-semi water plaster stone using the dry stewing method of microwave according to claim 4, feature are existed
In the microwave heating turns the ethylenediamine that crystal modifier used in crystalline substance is the tartaric acid of 0.5-1.5% volume, 0.1-0.5% volume
Tetraacethyl, 1-2% calcium oxide.
7. a kind of production technology for being prepared alpha-semi water plaster stone using the dry stewing method of microwave according to claim 1, feature are existed
In microwave drying is to turn brilliant in microwave heating to take humid air away after the reaction was completed, then continues microwave heating to material, dry
Material.
8. a kind of production technology for being prepared alpha-semi water plaster stone using the dry stewing method of microwave according to claim 7, feature are existed
In microwave drying temperature is controlled at 60-80 DEG C, and the reaction time is about 30-60min.
9. a kind of production technology for being prepared alpha-semi water plaster stone using the dry stewing method of microwave according to claim 1, feature are existed
In it is using equipment by pockets of material scattering, substantially not to material that described be crushed, which is carried out in closing, dry environment,
Grain fineness generate change.
10. a kind of production technology for being prepared alpha-semi water plaster stone using the dry stewing method of microwave according to claim 1, feature are existed
In the storage is carried out in the environment of close drying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910879090.9A CN110451830A (en) | 2019-09-18 | 2019-09-18 | A kind of production technology preparing alpha-semi water plaster stone using the dry stewing method of microwave |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910879090.9A CN110451830A (en) | 2019-09-18 | 2019-09-18 | A kind of production technology preparing alpha-semi water plaster stone using the dry stewing method of microwave |
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| Publication Number | Publication Date |
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| CN110451830A true CN110451830A (en) | 2019-11-15 |
Family
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| CN201910879090.9A Pending CN110451830A (en) | 2019-09-18 | 2019-09-18 | A kind of production technology preparing alpha-semi water plaster stone using the dry stewing method of microwave |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113754328A (en) * | 2021-09-30 | 2021-12-07 | 安徽六国化工股份有限公司 | Stable-structure hemihydrate-anhydrous calcium sulfate mixture and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3631883A1 (en) * | 1986-09-19 | 1988-03-31 | Pfeiffer Ag Geb | Process for producing alpha-gypsum |
| US20020164281A1 (en) * | 2001-05-01 | 2002-11-07 | Gopalakrishnan Sethuraman | Method of producing calcium sulfate alpha-hemihydrate |
| CN101643331A (en) * | 2009-09-07 | 2010-02-10 | 湖南安雅达建材科技有限公司 | Method for preparing gypsum powder by microwave activation |
| CN103723936A (en) * | 2013-09-11 | 2014-04-16 | 夏榆凌 | Method and device for producing building gypsum powder by chemical byproduct gypsum microwave technology |
| CN108314341A (en) * | 2018-03-12 | 2018-07-24 | 湘潭大学 | The manufacturing technique method of one kind of multiple strength character gypsum powder bodies |
| CN108483957A (en) * | 2018-03-12 | 2018-09-04 | 湘潭大学 | A method of producing alpha-semi water plaster stone |
-
2019
- 2019-09-18 CN CN201910879090.9A patent/CN110451830A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3631883A1 (en) * | 1986-09-19 | 1988-03-31 | Pfeiffer Ag Geb | Process for producing alpha-gypsum |
| US20020164281A1 (en) * | 2001-05-01 | 2002-11-07 | Gopalakrishnan Sethuraman | Method of producing calcium sulfate alpha-hemihydrate |
| CN101643331A (en) * | 2009-09-07 | 2010-02-10 | 湖南安雅达建材科技有限公司 | Method for preparing gypsum powder by microwave activation |
| CN103723936A (en) * | 2013-09-11 | 2014-04-16 | 夏榆凌 | Method and device for producing building gypsum powder by chemical byproduct gypsum microwave technology |
| CN108314341A (en) * | 2018-03-12 | 2018-07-24 | 湘潭大学 | The manufacturing technique method of one kind of multiple strength character gypsum powder bodies |
| CN108483957A (en) * | 2018-03-12 | 2018-09-04 | 湘潭大学 | A method of producing alpha-semi water plaster stone |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113754328A (en) * | 2021-09-30 | 2021-12-07 | 安徽六国化工股份有限公司 | Stable-structure hemihydrate-anhydrous calcium sulfate mixture and preparation method thereof |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191115 |
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| RJ01 | Rejection of invention patent application after publication |