CN105197977A - Preparation method for developing beta type phosphor building gypsum by utilizing microwaves - Google Patents
Preparation method for developing beta type phosphor building gypsum by utilizing microwaves Download PDFInfo
- Publication number
- CN105197977A CN105197977A CN201510566853.6A CN201510566853A CN105197977A CN 105197977 A CN105197977 A CN 105197977A CN 201510566853 A CN201510566853 A CN 201510566853A CN 105197977 A CN105197977 A CN 105197977A
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- CN
- China
- Prior art keywords
- phosphogypsum
- microwave
- preparation
- paris
- gypsum
- 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.)
- Granted
Links
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 229910052602 gypsum Inorganic materials 0.000 title abstract description 11
- 239000010440 gypsum Substances 0.000 title abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 claims description 57
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 45
- 229910052698 phosphorus Inorganic materials 0.000 claims description 33
- 239000011574 phosphorus Substances 0.000 claims description 31
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Inorganic materials [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 30
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 claims description 30
- 239000011507 gypsum plaster Substances 0.000 claims description 30
- 238000012216 screening Methods 0.000 claims description 20
- 238000002156 mixing Methods 0.000 claims description 10
- 238000007873 sieving Methods 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- 239000012535 impurity Substances 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 13
- 239000002699 waste material Substances 0.000 abstract description 3
- 239000013078 crystal Substances 0.000 abstract 1
- 238000005188 flotation Methods 0.000 abstract 1
- 238000002203 pretreatment Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 4
- 229920002472 Starch Polymers 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000011396 hydraulic cement Substances 0.000 description 3
- 239000004570 mortar (masonry) Substances 0.000 description 3
- 235000019698 starch Nutrition 0.000 description 3
- 239000008107 starch Substances 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000010534 mechanism of action Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a preparation method for developing beta type phosphor building gypsum by utilizing microwaves, and belongs to the technical field of novel gypsum materials. The preparation method is characterized in that waste phosphor gypsum is pretreated by utilizing the microwaves, phosphor gypsum is dewatered under an environment in appropriate temperature and time, and the shape of a phosphor gypsum crystal is changed, so that high-strength beta type phosphor building gypsum is obtained. Compared with a traditional method, the preparation method disclosed by the invention has the different points that during a pretreatment process of the phosphor gypsum, a traditional flotation pretreatment method is replaced with a microwave heating principle, so that the beta type phosphor building gypsum which is higher in strength and strong in water resistance and meets the national standard is obtained.
Description
Technical field
The present invention relates to a kind of preparation method utilizing microwave to develop β type phosphorus plaster of Paris, belong to novel gypsum field of material technology.
Background technology
The technology of tradition preparation β type phosphorus plaster of Paris, is not need to add a large amount of water at pretreatment stage, needs exactly manually to carry out operation agent, thus produce environmental pollution, cannot the problem such as industrial production, increase cost of labor completely.The present invention prepare decrease water in the process of β type phosphorus plaster of Paris usage quantity, can industrialization completely, utilize microwave principle to add the intensity of phosphogypsum, reduce the harm of the waste water after process phosphogypsum to environment and human body; Decrease the cost of labor expense of manual handling part in process phosphogypsum process; Change the method that tradition prepares phosphorus plaster of Paris, advantageously in industrial production.
Summary of the invention
The present invention utilizes microwave treatment technology, and reduce the organic content in phosphogypsum waste material, thus after the further drying and dehydrating of phosphogypsum material, obtain high strength β type phosphorus plaster of Paris, described method specifically comprises the following steps:
(1) getting phosphogypsum, be sieving through the sieve that sieve aperture is 0.15mm, collecting the phosphogypsum after screening in order to using;
(2) phosphogypsum after screening is put into microwave container, the phosphogypsum after screening is put into EG025LC7-NSH type microwave oven and carries out microwave treatment;
(3) be that the ratio of 1:0.667 ~ 0.333:0.003 ~ 0.0035 is by the phosphogypsum after microwave, water, citric acid mixing in phosphogypsum, water, citric acid weight ratio;
(4) material stirring of mixing in step (3) is made it even at more than 10min, then leave standstill more than 30min;
(5) by the material that is stirred in step (4), Ca (OH) is added
2, stir more than 10min, leave standstill more than 30min, measure pH value, the above step in repeating step (5), until the scope of material pH value is between 7 ~ 10;
(6) material good for discharging in step (5) is put into loft drier material disc, require that material thickness in dish is 2cm ~ 4cm; Material is put into heating air blast thermostatic drying chamber (model: 101-4 type; Voltage 380v, power 9000w; Air blast power: 440w) with 145 DEG C heating 3.5h, wherein from loft drier reach 145 DEG C later timing;
(7) take out phosphogypsum that in step (6), loft drier heat treated completes and place its temperature when being reduced to 20 ~ 30 DEG C, be sieving through the sieve that sieve aperture is 0.15mm, collect the phosphogypsum after screening, just obtain β type phosphorus plaster of Paris.
Microwave treatment phosphogypsum in described step (2), microwave output power is 1000w, microwave time 30min.
In described step (3), the median size of citric acid is 1 μm ~ 1mm, and composition and mass percent scope are:
C
6h
8o
7h
2o :≤99.5%, all the other are impurity.
Phosphogypsum in described step (1) can adopt composition and mass percent scope to be: SiO
2: 13.32% ~ 15.12%, Fe
2o
3: 0.29% ~ 0.36%, CaO:21.46% ~ 25.3%, MgO:0.02% ~ 0.035%, H
2o:2.21% ~ 2.73%, F:0.12% ~ 0.14%, P
2o
5: 0.46% ~ 0.62%, Al
2o
3: 0.76% ~ 0.96%, Cl:0.011% ~ 0.013%, SO
3: 44.2% ~ 44.6%.
The β type phosphorus plaster of Paris fineness obtained in described step (7) is 100 ~ 150 orders.
The β type phosphorus plaster of Paris composition obtained in described step (7) and mass percent scope:
SiO
2:11.72%~13.12%、Fe
2O
3:0.28%~0.32%、CaO:24.46%~26.45%、MgO:0.03%~0.05%、H
2O:2.21%~2.33%、F:0.05%~0.07%、P
2O
5:0.56%~0.62%、Al
2O
3:0.84%~0.96%、Cl:0.017%~0.019%、SO
3：46.96%~48.86%。
Beneficial effect of the present invention: the present invention utilizes microwave principle process phosphogypsum waste material, the reaction of phosphogypsum in loft drier heat treated and changing conditions is made to be different from conventional method, utilize the present invention to prepare β type phosphorus plaster of Paris and have good effect to the organism foreign material of phosphogypsum and inorganic contaminants removal of impurities etc., and have significant impact to the add water intensity of preparation β type phosphorus building gypsum products of later stage phosphogypsum.Therefore, the mechanism of action utilizing the present invention to prepare β type phosphorus plaster of Paris is the preparation process that distilled on the basis of traditional phosphogypsum treatment process, accelerates the organism removal of impurities of phosphogypsum fully and decreases test period.
Embodiment
Below by embodiment, the present invention is described in further detail, but scope is not limited to described content.
Embodiment 1
Utilize microwave to develop the preparation method of β type phosphorus plaster of Paris described in the present embodiment, specifically comprise the following steps:
(1) getting phosphogypsum, be sieving through the sieve that sieve aperture is 0.15mm, collecting the phosphogypsum after screening in order to using;
(2) phosphogypsum after screening is put into microwave container, the phosphogypsum after screening is put into EG025LC7-NSH type microwave oven and carries out microwave treatment;
(3) be that the ratio of 1:0.667:0.003 is by the phosphogypsum after microwave, water, citric acid mixing in phosphogypsum, water, citric acid weight ratio;
(4) material stirring of mixing in step (3) is made it even at more than 10min, then leave standstill more than 30min;
(5) by the material that is stirred in step (4), Ca (OH) is added
2, stir more than 10min, leave standstill more than 30min, measure pH value, the above step in repeating step (5), until the scope of material pH value is between 7 ~ 10;
(6) material good for discharging in step (5) is put into loft drier material disc, require that material thickness in dish is 2cm ~ 4cm; Material is put into heating air blast thermostatic drying chamber with 145 DEG C heating 3.5h, wherein from loft drier reach 145 DEG C later timing;
(7) take out phosphogypsum that in step (6), loft drier heat treated completes and place its temperature when being reduced to 20 ~ 30 DEG C, be sieving through the sieve that sieve aperture is 0.15mm, collect the phosphogypsum after screening, just obtain β type phosphorus plaster of Paris.
Microwave treatment phosphogypsum in described step (2), microwave output power is 1000w, microwave time 30min.
In described step (3), the median size of citric acid is 1 μm ~ 1mm, and composition and mass percent scope are:
C
6h
8o
7h
2o :≤99.5%, all the other are impurity.
Detect the technological property of above-mentioned phosphorus plaster of Paris: starch the presetting period, final setting time is as shown in table 1, meet the technical requirements of GB/T23456-2009; Through the detection of water tolerance coefficient of softening, the β type phosphorus plaster of Paris test block in embodiment 1 is not chapped, and be not also out of shape, coefficient of softening is as shown in table 1.Its intensity level is surveyed as shown in table 1 according to GB/T17671-1999 " Test method for strength of hydraulic cement mortar (ISO method) ".
Table 1 β type phosphorus plaster of Paris technological property
Embodiment 2:
Utilize microwave to develop the preparation method of β type phosphorus plaster of Paris described in the present embodiment, specifically comprise the following steps:
(1) getting phosphogypsum, be sieving through the sieve that sieve aperture is 0.15mm, collecting the phosphogypsum after screening in order to using;
(2) phosphogypsum after screening is put into microwave container, the phosphogypsum after screening is put into EG025LC7-NSH type microwave oven and carries out microwave treatment;
(3) be that the ratio of 1:0.5:0.00325 is by the phosphogypsum after microwave, water, citric acid mixing in phosphogypsum, water, citric acid weight ratio;
(4) material stirring of mixing in step (3) is made it even at more than 10min, then leave standstill more than 30min;
(5) by the material that is stirred in step (4), Ca (OH) is added
2, stir more than 10min, leave standstill more than 30min, measure pH value, the above step in repeating step (5), until the scope of material pH value is between 7 ~ 10;
(6) material good for discharging in step (5) is put into loft drier material disc, require that material thickness in dish is 2cm ~ 4cm; Material is put into heating air blast thermostatic drying chamber with 145 DEG C heating 3.5h, wherein from loft drier reach 145 DEG C later timing;
(7) take out phosphogypsum that in step (6), loft drier heat treated completes and place its temperature when being reduced to 20 ~ 30 DEG C, be sieving through the sieve that sieve aperture is 0.15mm, collect the phosphogypsum after screening, just obtain β type phosphorus plaster of Paris.
Microwave treatment phosphogypsum in described step (2), microwave output power is 1000w, microwave time 30min.
In described step (3), the median size of citric acid is 1 μm ~ 1mm, and composition and mass percent scope are:
C
6h
8o
7h
2o :≤99.5%, all the other are impurity.
Detect the technological property of above-mentioned phosphorus plaster of Paris: starch the presetting period, final setting time is as shown in table 2, meet the technical requirements of GB/T23456-2009; Through the detection of water tolerance coefficient of softening, the β type phosphorus plaster of Paris test block in embodiment 2 is not chapped, and be not also out of shape, coefficient of softening is as shown in table 2.Its intensity level is surveyed as shown in table 2 according to GB/T17671-1999 " Test method for strength of hydraulic cement mortar (ISO method) ".
Table 2 β type phosphorus plaster of Paris technological property
Embodiment 3:
Utilize microwave to develop the preparation method of β type phosphorus plaster of Paris described in the present embodiment, specifically comprise the following steps:
(1) getting phosphogypsum, be sieving through the sieve that sieve aperture is 0.15mm, collecting the phosphogypsum after screening in order to using;
(2) phosphogypsum after screening is put into microwave container, the phosphogypsum after screening is put into EG025LC7-NSH type microwave oven and carries out microwave treatment;
(3) be that the ratio of 1:0.333:0.0035 is by the phosphogypsum after microwave, water, citric acid mixing in phosphogypsum, water, citric acid weight ratio;
(4) material stirring of mixing in step (3) is made it even at more than 10min, then leave standstill more than 30min;
(5) by the material that is stirred in step (4), Ca (OH) is added
2, stir more than 10min, leave standstill more than 30min, measure pH value, the above step in repeating step (5), until the scope of material pH value is between 7 ~ 10;
(6) material good for discharging in step (5) is put into loft drier material disc, require that material thickness in dish is 2cm ~ 4cm; Material is put into heating air blast thermostatic drying chamber with 145 DEG C heating 3.5h, wherein from loft drier reach 145 DEG C later timing;
(7) take out phosphogypsum that in step (6), loft drier heat treated completes and place its temperature when being reduced to 20 ~ 30 DEG C, be sieving through the sieve that sieve aperture is 0.15mm, collect the phosphogypsum after screening, just obtain β type phosphorus plaster of Paris.
Microwave treatment phosphogypsum in described step (2), microwave output power is 1000w, microwave time 30min.
In described step (3), the median size of citric acid is 1 μm ~ 1mm, and composition and mass percent scope are:
C
6h
8o
7h
2o :≤99.5%, all the other are impurity.
Detect the technological property of above-mentioned phosphorus plaster of Paris: starch the presetting period, final setting time is as shown in table 2, meet the technical requirements of GB/T23456-2009; Through the detection of water tolerance coefficient of softening, the β type phosphorus plaster of Paris test block in embodiment 3 is not chapped, and be not also out of shape, coefficient of softening is as shown in table 3.Its intensity level is surveyed as shown in table 3 according to GB/T17671-1999 " Test method for strength of hydraulic cement mortar (ISO method) ".
Table 3 β type phosphorus plaster of Paris technological property
Above the specific embodiment of the present invention is explained in detail, but the present invention is not limited to above-mentioned embodiment, in the ken that those of ordinary skill in the art possess, various change can also be made under the prerequisite not departing from present inventive concept.
Claims (3)
1. utilize microwave to develop a preparation method for β type phosphorus plaster of Paris, it is characterized in that, specifically comprise the following steps:
(1) getting phosphogypsum, be sieving through the sieve that sieve aperture is 0.15mm, collecting the phosphogypsum after screening in order to using;
(2) phosphogypsum after screening is put into microwave container, the phosphogypsum after screening is put into EG025LC7-NSH type microwave oven and carries out microwave treatment;
(3) be that the ratio of 1:0.667 ~ 0.333:0.003 ~ 0.0035 is by the phosphogypsum after microwave, water, citric acid mixing in phosphogypsum, water, citric acid weight ratio;
(4) material stirring of mixing in step (3) is made it even at more than 10min, then leave standstill more than 30min;
(5) by the material that is stirred in step (4), Ca (OH) is added
2, stir more than 10min, leave standstill more than 30min, measure pH value, the above step in repeating step (5), until the scope of material pH value is between 7 ~ 10;
(6) material good for discharging in step (5) is put into loft drier material disc, require that material thickness in dish is 2cm ~ 4cm; Material is put into heating air blast thermostatic drying chamber with 145 DEG C heating 3.5h, wherein from loft drier reach 145 DEG C later timing;
(7) take out phosphogypsum that in step (6), loft drier heat treated completes and place its temperature when being reduced to 20 ~ 30 DEG C, be sieving through the sieve that sieve aperture is 0.15mm, collect the phosphogypsum after screening, just obtain β type phosphorus plaster of Paris.
2. the preparation method utilizing microwave to develop β type phosphorus plaster of Paris according to claim 1, is characterized in that: microwave treatment phosphogypsum in described step (2), microwave output power is 1000w, microwave time 30min.
3. the preparation method utilizing microwave to develop β type phosphorus plaster of Paris according to claim 1, is characterized in that: in described step (3), the median size of citric acid is 1 μm ~ 1mm, and composition and mass percent scope are:
C
6h
8o
7h
2o :≤99.5%, all the other are impurity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510566853.6A CN105197977B (en) | 2015-09-09 | 2015-09-09 | A kind of preparation method that β type phosphorus plaster of Paris is developed using microwave |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510566853.6A CN105197977B (en) | 2015-09-09 | 2015-09-09 | A kind of preparation method that β type phosphorus plaster of Paris is developed using microwave |
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|---|---|
| CN105197977A true CN105197977A (en) | 2015-12-30 |
| CN105197977B CN105197977B (en) | 2018-03-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109851261A (en) * | 2018-12-10 | 2019-06-07 | 华南理工大学 | A kind of environment-friendly type land plaster and the preparation method and application thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108314341B (en) * | 2018-03-12 | 2021-01-12 | 湘潭大学 | Production process method of gypsum powder with various strength properties |
| CN109851261A (en) * | 2018-12-10 | 2019-06-07 | 华南理工大学 | A kind of environment-friendly type land plaster and the preparation method and application thereof |
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| Publication number | Publication date |
|---|---|
| CN105197977B (en) | 2018-03-06 |
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