CN108117287A - The ardealite producing building land plaster of half water law of half water law of phosphoric acid by wet process and two water - Google Patents
The ardealite producing building land plaster of half water law of half water law of phosphoric acid by wet process and two water Download PDFInfo
- Publication number
- CN108117287A CN108117287A CN201711430245.8A CN201711430245A CN108117287A CN 108117287 A CN108117287 A CN 108117287A CN 201711430245 A CN201711430245 A CN 201711430245A CN 108117287 A CN108117287 A CN 108117287A
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- China
- Prior art keywords
- ardealite
- water
- half water
- gypsum
- law
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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
- 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
- C04B11/02—Methods and apparatus for dehydrating gypsum
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The purpose of the present invention is the ardealite producing building land plaster of half water law of half water law of phosphoric acid by wet process and two water, production craft step is：The aqueous half water ardealite slurries that (1) half water law and two water, half water law Wet Processes of Phosphoric Acid generate, which flow into, to be adjusted in brilliant slot；(2) half water ardealite slurries in brilliant slot are adjusted by adding the auxiliary agents such as habit modifier, exciting agent；(3) the aqueous half water ardealite slurries after crystalline substance is adjusted to be neutralized before filter plant is flowed into, it is 7 to make pH value；(4) and then by the aqueous gypsum after neutralization progress vacuum separation of solid and liquid in filter plant is flowed into, free water content is made to be less than 15%；(5) rapid draing is carried out into building gypsum plaster, meet the requirement of 2008 standards of building gypsum GB/T9776, this method can reduce ardealite yield 30 35%, reduce the stackeding space of ardealite, the production cost that building gypsum plaster is made in ardealite can also be reduced simultaneously, the appreciation space of ardealite is improved, mitigates the environmental protection pressure of enterprise.
Description
Technical field
The present invention relates to fields in terms of gypsum building material, are mainly concerned with half water law of half water law of phosphoric acid by wet process and two water
Ardealite producing building land plaster.
Background technology
China's Wet Processes of Phosphoric Acid is almost two water laws, and generated waste residue --- ardealite is calcium sulphate dihydrate
CaSO4·2H2O from comprehensive utilization of resources in terms of the approach of building materials, is largely sintered into β gypsum, produces manufactured goods：Paper-faced gyp
Plate, brushing gypsum, plasterboard, gypsum block, gypsum lath etc., as National Environmental administers more and more tighter, the resource of ardealite
Comprehensive utilization pressure is increasing, but the technique of previous gypsum processing needs substantial amounts of ardealite, largely makes
Into the pressure of pollution and the environmental protection of environment, while ardealite is stacked in substantial amounts of stockyard in need, has both been improved heap and has been freeed
Cost is produced, there is the environmental protection pressure for increasing phosphatic fertilizer company.
It therefore, need not by chemical method with the ardealite producing building land plaster of half water law of half water law of phosphoric acid by wet process and two water
Calcining directly produces building gypsum plaster, can reduce the yield of ardealite, reduces production cost, while can improve ardealite
Appreciation space, reduce production and processing when ardealite stackeding space, mitigate the environmental protection pressure of enterprise, while production can be made
Phosphoric acid concentration is greatly improved, just become those skilled in the art's urgent need to resolve the problem of.
The content of the invention
The object of the present invention is to provide the ardealite producing building land plasters of half water law of half water law of phosphoric acid by wet process and two water, reduce
The production cost of building gypsum plaster, while the appreciation space of ardealite can be improved, the stackeding space of ardealite is reduced, mitigates enterprise
The environmental protection pressure of industry, while the phosphoric acid concentration of production can be made to be greatly improved.
To solve technical problem described in background technology, the present invention uses following technical scheme：
The ardealite producing building land plaster of half water law of half water law of phosphoric acid by wet process and two water, production craft step are：
(1) by making two water stones after adding the concentrated sulfuric acid in the reactive tank of the Wet Processes of Phosphoric Acid of half water law of half water law or two water
Cream becomes half water phosphorus stone crystal, is then being flowed into the aqueous half water phosphorus stone slurries in reactive tank in the brilliant slot of tune；
(2) in step 1 reactive tank be flowed into the half water ardealite slurries adjusted in brilliant slot add habit modifier 0.5-
2.0% and exciting agent 0.3-2.6%, crystal morphology is made to develop into building gypsum plaster；
(3) and then half water ardealite slurries of the tune after brilliant are flowed into filter plant and be filtered, after filtering
The free water management of gypsum is 15% or so；When gypsum carries out adjusting brilliant and filtering, temperature is strictly controlled, to inhibit half water stone
Cream aquation；
(4) adjust it is brilliant after half water ardealite into neutralizer is added in before filter plant, make ph values for 7 or so when；It is aqueous
Half water ardealite powder enters drying kiln, and rapid draing is into building gypsum plaster；
Preferably, the temperature inside brilliant slot is adjusted to control at 90-110 DEG C in the step 2 and step 3.
Preferably, the step 2 is small to the content control of gypsum semi-hydrated gypsum Free water after brilliant slot is adjusted to carry out tune crystalline substance
In 70%.
Preferably, temperature of the semi-hydrated gypsum in filtering carries out thermostatic control at 100-110 DEG C.
Preferably, it is small that the gypsum free water content that rapid drying advances into drying kiln is carried out in the step 3 to gypsum
In 15%.
Preferably, gypsum to be dried is in vacuum environment state when being dried in the step 4.
Preferably, gypsum is carried out in the step 4 in ph and when gypsum can also be by the content of neutralizer
5-8%.
Preferably, flowed into the step 2 after reactive tank adjust the water ardealite in brilliant slot by additive level
Can also be for：Habit modifier 0.5-1.0%, exciting agent 0.3-1.6%.
The beneficial effects of the invention are as follows：
1) yield of ardealite, can be effectively reduced, reduces the production cost of building gypsum plaster, while can be improved
The appreciation space of ardealite reduces the stackeding space of ardealite, mitigates the environmental protection pressure of enterprise.
2) while the phosphoric acid concentration of production can be made to be greatly improved.
Specific embodiment
In order to which those skilled in the art is made to more fully understand technical scheme, the present invention will be made into one below
Step is discussed in detail.
Embodiment 1：
The ardealite producing building land plaster of half water law of half water law of phosphoric acid by wet process and two water, production craft step are：
(1) in step 1 by making two water after adding the concentrated sulfuric acid in the reactive tank in wet phosphoric acid by dihydrate technical process
Gypsum becomes half water phosphorus stone crystal, is then being flowed into half water phosphorus stone crystal in reactive tank in the brilliant slot of tune；
(2) it is drained into step 2 from reactive tank in the water ardealite crystal adjusted in brilliant slot and is added habit modifier 0.5%
With exciting agent 0.4%, crystal habit is made slowly to develop into building gypsum plaster；
(3) and then gypsum of the tune after brilliant is flowed into filter plant again and be filtered, when gypsum is filtered to mistake
Temperature in filter equipment carries out being strict controlled in 10%；When gypsum carries out adjusting brilliant and filtering, temperature is strictly controlled, with suppression
Semi-hydrated gypsum aquation processed；
(4) adjust it is brilliant after half water ardealite when it is 7 or so into neutralizer is added in before filter plant, to make ph values, progress
Rapid draing is into building gypsum plaster；
(5) aqueous half water ardealite powder enters drying kiln.
Further, the temperature in the step 2 and step 3 inside filter plant is controlled at 90 DEG C.
Further, content control of the step 2 to gypsum semi-hydrated gypsum Free water after brilliant slot is adjusted to carry out adjusting crystalline substance
Less than 70%.
Further, temperature of the semi-hydrated gypsum when adjusting brilliant carries out thermostatic control at 100 DEG C.
Further, the rapid dry gypsum free water content for advancing into drying kiln is carried out in the step 3 to gypsum
Less than 10%.
Further, gypsum to be dried is in vacuum environment state when being dried in the step 4.
Further, gypsum is carried out in the step 4 in ph and when gypsum can be with by the content of neutralizer
It is 5%.
Further, flowed into the step 2 after reactive tank adjust the water ardealite in brilliant slot by additive contain
Amount can also be for：Habit modifier 0.5%, exciting agent 1.6%.
Using this group of data, the usage amount of ardealite reduces by 35% height when producing effectively building gypsum plaster,
The whole nation can reduce 2000-2,400 ten thousand tons of ardealite output, can effectively reduce production cost, while can improve phosphorus stone
The appreciation space of cream, while the phosphoric acid concentration produced can be made to reach more than 40%, and ardealite when reducing production and processing
Stackeding space, mitigate the environmental protection pressure of enterprise.
Embodiment 2：
The ardealite producing building land plaster of half water law of half water law of phosphoric acid by wet process and two water, production craft step are：
(1) in step 1 by making two water after adding the concentrated sulfuric acid in the reactive tank in wet phosphoric acid by dihydrate technical process
Gypsum becomes half water phosphorus stone crystal, is then being flowed into half water phosphorus stone crystal in reactive tank in the brilliant slot of tune；
(2) it is drained into step 2 from reactive tank in the water ardealite crystal adjusted in brilliant slot and is added habit modifier 2.0%
With exciting agent 2.6%, crystal habit is made slowly to develop into building gypsum plaster；
(3) and then gypsum of the tune after brilliant is flowed into filter plant again and be filtered, when gypsum is filtered to mistake
Temperature in filter equipment carries out being strict controlled in 10%；When gypsum carries out adjusting brilliant and filtering, temperature is strictly controlled, with suppression
Semi-hydrated gypsum aquation processed；
(4) adjust it is brilliant after half water ardealite when it is 7 or so into neutralizer is added in before filter plant, to make ph values, progress
Rapid draing is into building gypsum plaster；
(5) aqueous half water ardealite powder enters drying kiln.
Further, the temperature in the step 2 and step 3 inside filter plant is controlled at 110 DEG C.
Further, content control of the step 2 to gypsum semi-hydrated gypsum Free water after brilliant slot is adjusted to carry out adjusting crystalline substance
Less than 70%.
Further, temperature of the semi-hydrated gypsum when adjusting brilliant carries out thermostatic control at 110 DEG C.
Further, the rapid dry gypsum free water content for advancing into drying kiln is carried out in the step 3 to gypsum
Less than 10%.
Further, gypsum to be dried is in vacuum environment state when being dried in the step 4.
Further, gypsum is carried out in the step 4 in ph and when gypsum can be with by the content of neutralizer
It is 8%.
Further, flowed into the step 2 after reactive tank adjust the water ardealite in brilliant slot by additive contain
Amount can also be for：Habit modifier 1.0%, exciting agent 0.8%.
Embodiment 3：
The ardealite producing building land plaster of half water law of half water law of phosphoric acid by wet process and two water, production craft step are：
(1) in step 1 by making two water after adding the concentrated sulfuric acid in the reactive tank in wet phosphoric acid by dihydrate technical process
Gypsum becomes half water phosphorus stone crystal, is then being flowed into half water phosphorus stone crystal in reactive tank in the brilliant slot of tune；
(2) it is drained into step 2 from reactive tank in the water ardealite crystal adjusted in brilliant slot and is added habit modifier 1.5%
With exciting agent 2.0%, crystal habit is made slowly to develop into building gypsum plaster；
(3) and then gypsum of the tune after brilliant is flowed into filter plant again and be filtered, when gypsum is filtered to mistake
Temperature in filter equipment carries out being strict controlled in 10%；When gypsum carries out adjusting brilliant and filtering, temperature is strictly controlled, with suppression
Semi-hydrated gypsum aquation processed；
(4) adjust it is brilliant after half water ardealite when it is 7 or so into neutralizer is added in before filter plant, to make ph values, progress
Rapid draing is into building gypsum plaster；
(5) aqueous half water ardealite powder enters drying kiln.
Further, the temperature in the step 2 and step 3 inside filter plant is controlled at 100 DEG C.
Further, content control of the step 2 to gypsum semi-hydrated gypsum Free water after brilliant slot is adjusted to carry out adjusting crystalline substance
Less than 70%.
Further, temperature of the semi-hydrated gypsum when adjusting brilliant carries out thermostatic control at 105 DEG C.
Further, the rapid dry gypsum free water content for advancing into drying kiln is carried out in the step 3 to gypsum
Less than 10%.
Further, gypsum to be dried is in vacuum environment state when being dried in the step 4.
Further, gypsum is carried out in the step 4 in ph and when gypsum can be with by the content of neutralizer
It is 7%.
Further, flowed into the step 2 after reactive tank adjust the water ardealite in brilliant slot by additive contain
Amount can also be for：Habit modifier 0.8%, exciting agent 1.0%.
Above some exemplary embodiments that the present invention is only described by way of explanation, undoubtedly, for ability
The those of ordinary skill in domain, without departing from the spirit and scope of the present invention, can be with a variety of modes to institute
The embodiment of description is modified.Therefore, foregoing description is regarded as illustrative in nature, and should not be construed as will to right of the present invention
Ask the limitation of protection domain.
Claims (8)
1. the ardealite producing building land plaster of half water law of half water law of phosphoric acid by wet process and two water, which is characterized in that its production technology walks
Suddenly it is：
(1) by becoming dihydrate gypsum after adding the concentrated sulfuric acid in the reactive tank of the Wet Processes of Phosphoric Acid of half water law of half water law or two water
Then aqueous half water phosphorus stone slurries in reactive tank are being flowed into the brilliant slot of tune by Cheng Banshui phosphorus stone crystal；
(2) it is flowed into step 1 in reactive tank in the half water ardealite slurries adjusted in brilliant slot and adds habit modifier 0.5-2.0%
With exciting agent 0.3-2.6%, crystal morphology is made to develop into building gypsum plaster；
(3) and then half water ardealite slurries of the tune after brilliant are flowed into filter plant and be filtered, the gypsum after filtering
Free water management is 15% or so；When gypsum carries out adjusting brilliant and filtering, temperature is strictly controlled, to inhibit semi-hydrated gypsum water
Change；
(4) adjust it is brilliant after half water ardealite into neutralizer is added in before filter plant, make ph values for 7 or so when；Aqueous half water
Ardealite powder enters drying kiln, and rapid draing is into building gypsum plaster.
2. the ardealite producing building land plaster of half water law of phosphoric acid by wet process according to claim 1 and two water, half water law, special
Sign is, the temperature inside brilliant slot is adjusted to control at 100-110 DEG C in the step 2 and step 3.
3. the ardealite producing building land plaster of half water law of phosphoric acid by wet process according to claim 1 and two water, half water law, special
Sign is that the content control of semi-hydrated gypsum Free water after brilliant slot is adjusted to carry out tune crystalline substance is less than 70% to the step 2 to gypsum.
4. the ardealite producing building land plaster of half water law of phosphoric acid by wet process according to claim 2 and two water, half water law, special
Sign is that thermostatic of the semi-hydrated gypsum in filter plant is controlled at 100-110 DEG C.
5. the ardealite producing building land plaster of half water law of phosphoric acid by wet process according to claim 1 and two water, half water law, special
Sign is, carries out the rapid dry gypsum free water content for advancing into drying kiln in the step 3 to gypsum and is less than 15%.
6. the ardealite producing building land plaster of half water law of phosphoric acid by wet process according to claim 1 and two water, half water law, special
Sign is that gypsum when being dried in the step 4 is in vacuum environment state.
7. the ardealite producing building land plaster of half water law of phosphoric acid by wet process according to claim 1 and two water, half water law, special
Sign is that the content of the neutralizer of gypsum when being neutralized in the step 4 to gypsum can also be 5-8%.
8. the ardealite producing building land plaster of half water law of phosphoric acid by wet process according to claim 1 and two water, half water law, special
Sign is, in the step 2 reactive tank flow into adjust half water ardealite in brilliant slot by additive level can also be：
Habit modifier 0.5-1.0%, exciting agent 0.3-1.6%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711430245.8A CN108117287A (en) | 2017-12-26 | 2017-12-26 | The ardealite producing building land plaster of half water law of half water law of phosphoric acid by wet process and two water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711430245.8A CN108117287A (en) | 2017-12-26 | 2017-12-26 | The ardealite producing building land plaster of half water law of half water law of phosphoric acid by wet process and two water |
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| CN108117287A true CN108117287A (en) | 2018-06-05 |
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| CN201711430245.8A Pending CN108117287A (en) | 2017-12-26 | 2017-12-26 | The ardealite producing building land plaster of half water law of half water law of phosphoric acid by wet process and two water |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103086335A (en) * | 2013-02-05 | 2013-05-08 | 瓮福（集团）有限责任公司 | Method for production of phosphoric acid and combined production of a-hemihydrate gypsum through dehydrate-hemihydrate wet phosphoric acid technology |
| CN104016651A (en) * | 2014-06-19 | 2014-09-03 | 安徽森科新材料有限公司 | Manufacturing method for producing gypsum hollow building block from hemihydrate phosphogypsum waste slag |
| CN105174760A (en) * | 2015-09-18 | 2015-12-23 | 金正大生态工程集团股份有限公司 | Method for preparing alpha semi-hydrated gypsum from dihydrate gypsum |
| CN105776303A (en) * | 2016-01-30 | 2016-07-20 | 瓮福（集团）有限责任公司 | Production method of alpha-hemihydrate gypsum |
-
2017
- 2017-12-26 CN CN201711430245.8A patent/CN108117287A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103086335A (en) * | 2013-02-05 | 2013-05-08 | 瓮福（集团）有限责任公司 | Method for production of phosphoric acid and combined production of a-hemihydrate gypsum through dehydrate-hemihydrate wet phosphoric acid technology |
| CN104016651A (en) * | 2014-06-19 | 2014-09-03 | 安徽森科新材料有限公司 | Manufacturing method for producing gypsum hollow building block from hemihydrate phosphogypsum waste slag |
| CN105174760A (en) * | 2015-09-18 | 2015-12-23 | 金正大生态工程集团股份有限公司 | Method for preparing alpha semi-hydrated gypsum from dihydrate gypsum |
| CN105776303A (en) * | 2016-01-30 | 2016-07-20 | 瓮福（集团）有限责任公司 | Production method of alpha-hemihydrate gypsum |
Non-Patent Citations (1)
| Title |
|---|
| 覃光新: ""瓮福(英坪)磷矿采用半水法生产高浓度磷酸的工艺探讨"", 《贵州化工》 * |
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