CN106186755B - Plaster of paris and preparation method thereof - Google Patents
Plaster of paris and preparation method thereof Download PDFInfo
- Publication number
- CN106186755B CN106186755B CN201610525647.5A CN201610525647A CN106186755B CN 106186755 B CN106186755 B CN 106186755B CN 201610525647 A CN201610525647 A CN 201610525647A CN 106186755 B CN106186755 B CN 106186755B
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- raw material
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- weight percent
- plaster
- paris
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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
- C04B11/028—Devices therefor characterised by the type of calcining devices used therefor or by the type of hemihydrate obtained
- C04B11/036—Devices therefor characterised by the type of calcining devices used therefor or by the type of hemihydrate obtained for the dry process, e.g. dehydrating in a fluidised bed or in a rotary kiln, i.e. to obtain beta-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
- C04B11/002—Mixtures of different CaSO4-modifications, e.g. plaster of Paris and anhydrite, used as cements
-
- 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
- C04B11/007—After-treatment of the dehydration products, e.g. aging, stabilisation
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention provides a kind of plaster of paris and preparation method thereof, which contains β CaSO4·1/2H2The weight percent of O is 65.8%~68.6%, β CaSO4Weight percent be 16.6%~18.4%, CaSO4·2H2The weight percent of O is 0.30%~0.44%, and surplus is impurity.The plaster of paris of the present invention, the presetting period can be extended at 1 ' 45 second to 1 ' 55 second, so that the ingredient station of plasterboard, the slurry presetting period extends to 20 25 seconds, improve slurry flowing character state, it is generated without apparent floating block at stripper plate leading portion slurry accumulation, product examination edge bubble percent defective can be down to 2% by 20%.
Description
Technical field
The present invention relates to plaster plate making fields, and the ripe of gypsum board products edge bubble can be reduced more particularly to a kind of
Gypsum and the preparation method for making the plaster of paris.
Background technology
Gypsum lath product line ingredient station technology controlling and process, plays a key effect to the process control of product quality, mesh
It is preceding the country gypsum board production line linear speed usually in 40-60m/min, if beyond the range operation after, the raising of production line linear speed
To the process control needs of ingredient station with regard to very strict.
Wherein, the slurry flowing character state after dispensing directly affects the inherent quality of product, once ingredient station slurry
Mobility state difference then easily forms floating block on slurry surface layer, and floating block is easily rolled up after gradually hardening during entering stripper plate molding
Enter air, final gypsum board products edge is caused to generate bubble.
The reason of learning by analysis, generating bubble is that the speed of gypsum slurry initial set is too short, before entering stripper plate
In section banking process, initial set too early forms floating block, and floating block mobility state difference steps into extruding under the operation of mask paper
In plate；It since slurry has reached initial set in floating block, loses flowability substantially, tearing shape, meeting during entering stripper plate is presented
Gap is generated, air aftershaping is being involved in, is resulting in product edge bubble.
The prior art solves the problems, such as this, generally extends setting time using retarder, but the addition of retarder needs
To pass through many experiments, additive amount could be grasped, which is cumbersome.
Invention content
The invention aims to provide a kind of plaster of paris that can extend the presetting period,
A kind of ripe stone extending the presetting period is obtained by technology controlling and process it is a further object to provide a kind of
The preparation method of cream.
Particularly, the present invention provides a kind of plaster of paris, wherein
Contain β-CaSO4·1/2H2The weight percent of O is 65.8%~68.6%, β-CaSO4Weight percent be
16.6%~18.4%, CaSO4·2H2The weight percent of O is 0.30%~0.44%, and surplus is impurity.
Further, the β-CaSO4·1/2H2The weight percent of O is 66.8%~67.8%, β-CaSO4Weight
Percentage is 17%~18%, CaSO4·2H2The weight percent of O is 0.35%~0.4%, and surplus is impurity.
This provides a kind of preparation method of the plaster of paris, includes the following steps：
Raw material and heat smoke are sent into beater by step 10 simultaneously, and raw material is dried while being broken up by heat smoke, are led to
The temperature for crossing control heat smoke, makes the content of each composition in raw material meet preassigned；
Raw material after step 20, drying is re-fed into ball mill grinding after cottrell dedusting；
Raw material after step 30, grinding is sent into cooler and is cooled down by preset temperature；
Step 40, raw material after cooling are sent into the ageing of clinker storehouse, after default ageing, obtain final products.
Further, in the step 10, the moisture content of the raw material is 10%, and the temperature of the heat smoke is 167-
169 degree.
Further, in the step 10, the content of each composition meets preassigned and refers in the raw material：In raw material
β-CaSO4·1/2H2The weight percent of O is 65.8%~68.6%, β-CaSO4Weight percent be 16.6%~
18.4%, CaSO4·2H2The weight percent of O is 0.30%~0.44%, and surplus is impurity.
Further, in the step 10, the content of each composition meets preassigned and refers in the raw material：In raw material
β-CaSO4·1/2H2The weight percent of O is 66.8%~67.8%, β-CaSO4Weight percent be 17%~18%,
CaSO4·2H2The weight percent of O is 0.35%~0.4%, and surplus is impurity.
Further, in the step 30, the temperature of the raw material exported after cooler cooling is less than
70 degree.
Further, in the step 40, digestion time of the raw material in the clinker storehouse is at least 4 hours.
The plaster of paris of the present invention, can extend the presetting period at 1 ' 45 second to 1 ' 55 second so that the ingredient station of plasterboard,
The slurry presetting period extends to 20-25 seconds, slurry flowing character state is improved, without apparent floating at stripper plate leading portion slurry accumulation
Block generates, and product examination edge bubble percent defective can be down to 2% by 20%.
Description of the drawings
Fig. 1 is preparation method flow chart according to an embodiment of the invention.
Specific implementation mode
Its presetting period can be limited in 1 ' 45 second to 1 ' 55 second by the plaster of paris that one embodiment of the invention is related to.Its
Shown in composition and content following examples.
Embodiment 1：
β-the CaSO for being 65.8% including weight percent4·1/2H2O, and weight percent be 18.4% β-CaSO4、
And the CaSO that weight percent is 0.44%4·2H2O, surplus are impurity.
Embodiment 2：
β-the CaSO for being 68.6% including weight percent4·1/2H2O, and weight percent be 17.5% β-CaSO4、
And the CaSO that weight percent is 0.30%4·2H2O, surplus are impurity.
Embodiment 3：
β-the CaSO for being 67.2% including weight percent4·1/2H2O, and weight percent be 16.6% β-CaSO4、
And the CaSO that weight percent is 0.35%4·2H2O, surplus are impurity.
Embodiment 4：
β-the CaSO for being 66.8% including weight percent4·1/2H2O, and weight percent be 18% β-CaSO4, with
And the CaSO that weight percent is 0.35%4·2H2O, surplus are impurity.
Embodiment 5：
β-the CaSO for being 67.8% including weight percent4·1/2H2O, and weight percent be 17% β-CaSO4, with
And the CaSO that weight percent is 0.4%4·2H2O, surplus are impurity.
The preparation method for the plaster of paris that one embodiment of the invention is related to, includes the following steps：
Raw material and heat smoke are sent into beater by step 10 simultaneously, and raw material is dried while being broken up by heat smoke, are led to
The temperature for crossing control heat smoke, makes the content of each composition in raw material meet preassigned.
In this step, raw material is gypsum or desulfurated plaster, and moisture content is generally 10%, under this condition, control
The temperature of heat smoke is 167 DEG C -169 DEG C, to carry out calcining drying to raw material.
The preassigned of each ingredient is in raw material：β-CaSO4·1/2H2The weight percent of O accounts for 65.8%~68.6%,
β-CaSO4Weight percent account for 16.6%~18.4%, CaSO4·2H2When the weight percent of O accounts for 0.30%~0.44%
(surplus is impurity) stops the heating to raw material.
The preassigned of each ingredient can also be in raw material：β-CaSO4·1/2H2The weight percent of O accounts for 66.8%~
67.8%, β-CaSO4Weight percent account for 17%~18%, CaSO4·2H2The weight percent of O accounts for 0.35%~0.4%
When (surplus is impurity), stop drying to raw material.
The acquisition of above-mentioned parameter, can be by measuring to obtain in real time.
Raw material after step 20, drying is re-fed into ball mill grinding after cottrell dedusting.
Equipment in the prior art may be used in cottrell and ball mill in this step, and dust removing effects and grinding are marked
Standard, it is also consistent with standard when making plasterboard in the prior art.
Raw material after step 30, grinding is sent into cooler and is cooled down by preset temperature.
In this step, preset temperature needs the material temperature for ensureing finally to be discharged to be less than 70 DEG C.Specific cooling method
It can be cold wind cooling.
Step 40, raw material after cooling are sent into the ageing of clinker storehouse, after default ageing, obtain final products.
In this step, digestion time of the raw material in clinker storehouse is at least not less than 4 hours.
The plaster of paris obtained after above-mentioned steps are handled can extend the presetting period at 1 ' 45 second to 1 ' 55 second so that
The ingredient station slurry presetting period extends to 20-25 seconds, and slurry flowing character state is improved, at stripper plate leading portion slurry accumulation
No apparent floating block generates, and product examination edge bubble percent defective is down to 2% by 20%.
So far, although those skilled in the art will appreciate that present invention has been shown and described in detail herein multiple shows
Example property embodiment still without departing from the spirit and scope of the present invention, still can according to the present disclosure directly
Determine or derive many other variations or modifications consistent with the principles of the invention.Therefore, the scope of the present invention is understood that and recognizes
It is set to and covers other all these variations or modifications.
Claims (3)
1. a kind of preparation method of the plaster of paris, which is characterized in that include the following steps：
Raw material and heat smoke are sent into beater by step 10 simultaneously, the moisture content of the raw material is 10%, and raw material is being broken up
It is dried simultaneously by heat smoke, by controlling the temperature of heat smoke, the temperature of the heat smoke is 167 DEG C -169 DEG C, is made in raw material
The content of each composition meets preassigned, and the content of each composition meets preassigned and refers in the raw material：β-in raw material
CaSO4•½H2The weight percent of O is 65.8% ~ 68.6%, β-CaSO4Weight percent be 16.6% ~ 18.4%, CaSO4·
2H2The weight percent of O is 0.30%~0.44%, and surplus is impurity；
Raw material after step 20, drying is re-fed into ball mill grinding after cottrell dedusting；
Raw material after step 30, grinding is sent into cooler and is cooled down by preset temperature, is exported after cooler cooling
The raw material temperature be less than 70 degree；
Step 40, raw material after cooling are sent into the ageing of clinker storehouse, after default ageing, obtain final products.
2. preparation method according to claim 1, wherein
In the step 10, the content of each composition meets preassigned and refers in the raw material：β-CaSO in raw material4•½H2O's
Weight percent is 66.8% ~ 67.8%, β-CaSO4Weight percent be 17% ~ 18%, CaSO4·2H2The weight percent of O is
0.35% ~ 0.4%, surplus is impurity.
3. preparation method according to claim 1, wherein
In the step 40, digestion time of the raw material in the clinker storehouse is at least 4 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610525647.5A CN106186755B (en) | 2016-07-05 | 2016-07-05 | Plaster of paris and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610525647.5A CN106186755B (en) | 2016-07-05 | 2016-07-05 | Plaster of paris and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106186755A CN106186755A (en) | 2016-12-07 |
| CN106186755B true CN106186755B (en) | 2018-09-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610525647.5A Active CN106186755B (en) | 2016-07-05 | 2016-07-05 | Plaster of paris and preparation method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN106186755B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107056108B (en) * | 2017-05-09 | 2019-04-05 | 宁波北新建材有限公司 | A kind of cooling conveying of land plaster and accelerated ageing equipment |
| CN111229105B (en) * | 2020-02-12 | 2022-04-05 | 淮南北新建材有限公司 | Mix quick-witted foaming homogenization system |
| CN112223524A (en) * | 2020-09-08 | 2021-01-15 | 淮南北新建材有限公司 | Production method capable of improving shearing force of gypsum plasterboard |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02160620A (en) * | 1988-12-15 | 1990-06-20 | Mitsui Toatsu Chem Inc | Hydration of gypsum hemihydrate |
| CN101781097B (en) * | 2009-01-16 | 2012-05-09 | 北新集团建材股份有限公司 | Airflow desulphurization gypsum calcination system |
| CN105417975A (en) * | 2015-10-14 | 2016-03-23 | 王慧 | Technique for preparing building gypsum from desulfurized gypsum |
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2016
- 2016-07-05 CN CN201610525647.5A patent/CN106186755B/en active Active
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| Publication number | Publication date |
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| CN106186755A (en) | 2016-12-07 |
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