CN111377624B - Gypsum evaporation cooling aging tower - Google Patents
Gypsum evaporation cooling aging tower Download PDFInfo
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- CN111377624B CN111377624B CN202010307041.0A CN202010307041A CN111377624B CN 111377624 B CN111377624 B CN 111377624B CN 202010307041 A CN202010307041 A CN 202010307041A CN 111377624 B CN111377624 B CN 111377624B
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- Prior art keywords
- chamber
- gypsum
- aging
- cooling
- evaporation chamber
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- 238000001816 cooling Methods 0.000 title claims abstract description 53
- 238000001704 evaporation Methods 0.000 title claims abstract description 48
- 230000032683 aging Effects 0.000 title claims abstract description 45
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 43
- 239000010440 gypsum Substances 0.000 title claims abstract description 43
- 230000008020 evaporation Effects 0.000 title claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 52
- 238000005507 spraying Methods 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 239000000945 filler Substances 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 16
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 claims description 2
- 230000008093 supporting effect Effects 0.000 claims description 2
- 238000001354 calcination Methods 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 abstract description 5
- 230000008092 positive effect Effects 0.000 abstract description 2
- 230000006641 stabilisation Effects 0.000 abstract description 2
- 238000011105 stabilization Methods 0.000 abstract description 2
- 230000002431 foraging effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 229940095564 anhydrous calcium sulfate Drugs 0.000 description 3
- 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 description 3
- 230000001976 improved effect Effects 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 150000004683 dihydrates Chemical class 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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
- C04B11/007—After-treatment of the dehydration products, e.g. aging, stabilisation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D1/00—Devices using naturally cold air or cold water
Abstract
The invention discloses a gypsum evaporation cooling aging tower, wherein an evaporation chamber is arranged in the center of a cylinder body, a cooling chamber is formed between the inner wall of the cylinder body and the outer wall of the evaporation chamber, the evaporation chamber is communicated with the aging chamber, a multi-stage spraying system and multi-layer filler with heat exchange function are arranged in the evaporation chamber, the spraying system and the filler are alternately arranged at intervals, a certain amount of liquid water is evaporated by utilizing and absorbing part of heat of materials to be cooled, and the evaporated water vapor is used for aging the materials so as to reduce the amount of air used by adopting an all-air cooling and aging process, thereby achieving the purpose of reducing consumption, and particularly having positive effects on the aspects of production process control, product quality stabilization and the like in the field of gypsum calcination for treating high-solubility anhydrous gypsum; the required installed power is far smaller than that of the existing gypsum calcination line after-cooling device due to the two functions of cooling and aging.
Description
Technical Field
The invention belongs to the field of building material preparation, and particularly relates to equipment for rapidly cooling and aging calcined building gypsum, in particular to equipment for rapidly cooling and aging building gypsum with high soluble anhydrous calcium sulfate content.
Background
In the production process of building gypsum powder, calcium sulfate dihydrate (gypsum) is calcined into calcium sulfate hemihydrate (calcined gypsum). However, the phase composition of gypsum is relatively complex, and the building gypsum powder just calcined contains unstable or harmful phases such as a certain amount of soluble anhydrous calcium sulfate and a small amount of unreacted calcium sulfate dihydrate in addition to the main component calcium sulfate hemihydrate. In downstream application, especially in plastering mortar application, because of high content of soluble anhydrous calcium sulfate, fluctuation of three-phase composition with time and the like, problems of high viscosity of slurry, unstable setting time, easy cracking of products and the like are caused, and the control of the calcining end point of building gypsum and the improvement of product quality are not facilitated. Therefore, the gypsum is generally required to be aged after calcination, the ageing can convert the soluble anhydrous gypsum generated by overburning into regenerated semi-hydrated gypsum, the composition proportion of beneficial phases is improved, and meanwhile, the end point control of the gypsum calcination process is offset towards the overburning direction, so that the high conversion rate of the dihydrate gypsum is realized as much as possible, the production process and physical properties of the building gypsum are improved, and the application quality of products is improved.
As downstream plasters are increasingly used, building plaster is the most important raw material for plasters, and its yield has far failed to meet the demand. The supply and demand period of the building gypsum is greatly shortened, the building gypsum is often pulled away by a downstream plastering gypsum manufacturer just after being produced, and naturally, the natural ageing time is not needed, and even the natural cooling time is not needed. The existing ageing device is aged by introducing hot and humid air, which is definitely not beneficial to shortening the cooling time.
Meanwhile, in order to calcine building gypsum with larger yield, calcined gypsum manufacturers often adopt the purpose of improving the heat supply to achieve the purpose of improving the yield. However, the problems of incomplete burning or excessive burning caused by excessive temperature occur, which is unfavorable for stable end point. For gypsum calcining manufacturers, firstly, the 'burn-through' is ensured, and the purpose of full calcining is realized; while ensuring that a relatively high level of soluble anhydrite will be present after "burn-through", often in excess of 10%, even 20%, 30% or more.
The existing gypsum cooling and aging device is mainly in the forms of a suspension bin, a mechanical inverted bin, a rotary drum and the like according to the form of P95-102 building gypsum aging homogenization process and equipment of the national gypsum technical communication Congress and exhibition Congress 2018.9 of the ninth annual meeting of the gypsum building materials of the 2018 Chinese building materials Congress. The contact area of the materials in the forms and the air is small, the reaction intensity per unit volume is small, the power is provided by mechanical stirring or high-pressure air, the equipment utilization rate is low, and the energy consumption is high.
Disclosure of Invention
The invention aims to solve the technical problem of providing a gypsum evaporation cooling aging tower which is efficient in cooling and low in energy consumption.
In order to solve the technical problems, the invention adopts the following technical scheme: the gypsum evaporation cooling aging tower comprises a cylinder, wherein a feed inlet is formed in the side part of the cylinder, an evaporation chamber is arranged in the center of the cylinder, a cooling chamber is formed between the inner wall of the cylinder and the outer wall of the evaporation chamber, and the evaporation chamber is communicated with the aging chamber; the cooling chamber is provided with a negative pressure air inlet and a feeding port, the negative pressure air inlet inputs pulse air flow, the feeding port is positioned at a high-speed air flow area of the cooling chamber, and the pulse air flow is in a rising running state so as to enable gypsum materials to rise and float to the aging chamber; the evaporation chamber is internally provided with a multi-stage spraying system and multi-layer filler with heat exchange function, and the spraying system and the filler are alternately arranged at intervals; the evaporation chamber is provided with an air inlet and an air outlet, and the aging chamber is positioned at the air outlet of the evaporation chamber; the aging chamber is provided with a flow guide member.
Further, the side wall of the guide piece is provided with guide vanes.
Further, the flow guide piece is positioned above the air outlet of the evaporation chamber, the upper end and the lower end of the flow guide piece are conical, and the middle of the flow guide piece is cylindrical; a plurality of inclined guide vanes are arranged on the cylindrical side wall of the guide piece.
Further, one end of the guide vane is welded with the cylindrical barrel of the guide piece, and the other end of the guide vane is welded on the inner wall of the barrel.
Further, the guide vane is inclined at 45-60 degrees.
Further, the air inlet is provided with a water collecting tank, and the water collecting tank is filled with a filler with a water absorption function.
Further, the cooling indoor gas adopts pulse flow.
Further, a support frame for installing the spraying system and the filler is arranged in the evaporation chamber.
Further, the number of layers of the spraying system and the filler layer can be freely combined.
Further, the water collecting tank is provided with a liquid level meter, the liquid level meter can indicate the liquid level, and redundant water in the water collecting tank can be discharged.
By implementing the technical scheme of the invention, a certain amount of liquid water is evaporated by utilizing and absorbing part of heat of materials to be cooled, and the evaporated water vapor is used for ageing the materials so as to reduce the amount of air used by adopting an all-air cooling and ageing process, thereby achieving the purpose of reducing consumption, and particularly having positive effects on the aspects of production process control, product quality stabilization and the like in the field of gypsum calcination for treating the building gypsum with high soluble anhydrous gypsum content; the required installed power is far smaller than that of the existing gypsum calcination line after-cooling device due to the two functions of cooling and aging.
Drawings
FIG. 1 is a schematic diagram of a gypsum evaporative cooling aging tower.
Fig. 2 is a schematic structural view of the flow guiding member.
Fig. 3 is a top view of fig. 2.
In the figure: the device comprises a 1-air inlet, a 2-liquid level meter, a 3-water absorbing filler, a 4-water collecting tank, a 5-feed inlet, a 6-heat exchange filler, a 7-spraying system, an 8-reinforcing plate, a 9-evaporation chamber, a 10-supporting frame, an 11-inspection manhole, a 12-cylinder, a 13-hanging plate, a 14-guide piece, a 15-ageing chamber, a 16-air outlet, a 17-guide vane, a 18-cooling chamber, a 19-fixed plate and a 20-negative pressure air inlet.
Detailed Description
The following describes the embodiments of the present invention further with reference to the drawings. The description of these embodiments is provided to assist understanding of the present invention, but is not intended to limit the present invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
As shown in fig. 1, the gypsum evaporation cooling aging tower mainly comprises an evaporation chamber 9, a cooling chamber 18 and an aging chamber 15. A cooling chamber 18 is arranged between the evaporating chamber 9 and the cylinder 12, and an aging chamber 15 is arranged above the evaporating chamber 9.
The evaporation chamber 9 is provided with an air inlet 1, a spraying system 7, a heat exchange filler 6 and a supporting frame 10, wherein the air inlet 1 is positioned at the bottom of the evaporation chamber 9, and is supplied into the system by a fan. A spraying system 7 is arranged to humidify air, which is the wind passing through the evaporation chamber. At the bottom of the evaporation chamber, a water collecting tank 4 is arranged at the position of the air inlet 1 and is used for collecting liquid water which is not evaporated after spraying. After the water spraying quantity is stable for a period of time, the change of the water level in the water collecting tank is observed, and the water level is stable by adjusting the water spraying quantity and the valve of the liquid outlet. The spray system 7 uniformly humidifies at multiple points, and the gradient humidification ensures the humidification effect; the amount of humidification can be adjusted within a certain range. The water-absorbing filler 3 is arranged into the support leg type, so that the water accumulated in the water-collecting tank 4 can be absorbed, and the water-collecting tank can keep a certain liquid level, thereby being convenient for water level observation. The heat exchange packing 6 can enlarge the contact area of water and gas, strengthen the humidifying and heat exchange effects, and simultaneously generate guiding effect on air flow after the top air outlet, so that the air flow rises along the inner wall of the evaporation chamber 9 in a rotating way. The rotary ascending airflow is characterized in that the humidification of the water mist is enhanced, the redundant non-evaporated mist water is adhered to the inner wall of the evaporation chamber 9 under the drive of the cyclone wind to form a water film, the heat exchange effect of the water film is optimized, and the material in the tower is cooled for the second time through the dividing wall type heat exchange. The support frame 10 is arranged in the evaporation chamber 9, and can be provided with a heat exchange filler 6, a spraying system 7 and the like, so that the manufacture, the installation and the overhaul are convenient.
The cooling chamber 18 is provided with a negative pressure air inlet 20, a feed inlet 5 and an inspection manhole 11, and the aging chamber 15 is provided with a guide piece 14 and an air outlet 16. The lower part of the evaporation chamber 9 is fixed with the bottom of the cylinder 12 through a fixing plate 19, and the flow guide piece 14 is fixed through a hanging plate 13. The middle cavity part of the evaporating chamber 9 and the barrel 12 is a cooling chamber 18, the side wall of the barrel 12 is provided with a feed inlet 5, the feed inlet 5 is positioned in a high-speed air flow area of the cooling chamber 18, a plurality of high-speed air flow areas are arranged in the cooling chamber 18, and the outer wall of the barrel 12 at the position of the high-speed air flow area is provided with a reinforcing plate 8 to strengthen the strength of equipment. The outer wall of the cylinder 12 is provided with an inspection manhole 11 which is positioned below the guide piece 14.
As shown in fig. 2 and 3, the guide member 14 is located right above the air outlet of the evaporation chamber 9, the upper and lower ends are conical, the middle is cylindrical, four inclined guide vanes 17 are arranged on the cylindrical side wall, one end of each guide vane 17 is welded with the cylindrical barrel of the guide member 14, and the other end is welded on the inner wall of the barrel 12. The guide vane 17 forms a certain angle with the horizontal direction, preferably an included angle of 45-60 degrees.
An ageing chamber is arranged above the flow guide 14, and an outlet 16 is arranged at the ageing chamber 15, which can be connected with the pulse ageing tower through a flange or a simplified form thereof.
The working process of the evaporative cooling ageing tower is as follows: the hot material enters the cooling chamber 18 through the feed inlet 5, and pulse airflow is arranged in the cooling chamber 18 to strengthen the solid-gas mixing effect. The cooling air flow enters through the negative pressure air inlet of the cooling chamber, hot materials and cold air in the cooling chamber 18 are fully mixed, the heat exchange area of the mixed form is large, and the materials are instantaneously cooled once. The primary cooled material rises under the drive of the air flow and contacts with the wall body of the evaporating chamber 9 for secondary cooling.
The evaporation air current is sent into air intake 1 by air-assisted device, through absorbing packing 3, mix humidification with spray set 7 spun atomizing drop, carry out the dividing wall type heat transfer through evaporating chamber 9 wall body, under the reinforceing effect of heat transfer packing 6, increase the area of contact of steam, strengthen evaporation humidification effect, get into cooling chamber 18 by hanger plate 13 department export after many times humidification, wet cold gas after the humidification carries out the secondary mixing with the powder gas mixture after mixing the cooling in the cooling chamber, further cool down the material, carry out the ageing reaction simultaneously.
The liquid water enters the evaporation chamber 9 from the spraying system 7, the passing ascending airflow is humidified, the other liquid water forms a water film along the inner wall of the evaporation chamber 9 and flows into the bottom water collecting tank 4, the water level in the water collecting tank 4 is displayed by the liquid level meter 2, and the maximum water adding amount of the spraying system 7 is adjusted according to the liquid level of the liquid level meter 2, so that the maximum water adding amount is based on the condition that the water level in the water collecting tank does not rise. In the actual production process, the water adding amount of the spraying system 7 does not exceed the maximum water adding amount. If the water level of the water collecting tank rises faster, the water level meter 2 discharges excessive liquid water through the water discharging valve, and meanwhile, the water quantity of the spraying system 7 is reduced, so that the liquid water is ensured not to overflow.
The mixed fluid of the material and the gas continuously rises, is mixed with the wet and cold air from the outlet of the evaporation chamber 9 again below the guide piece 14, and is cooled for three times. The cooling air consumption can be reduced by reducing the cooling air consumption for multiple times in a multi-form way, and then the energy consumption of pneumatic equipment and the specification of subsequent tail gas treatment equipment are reduced, so that the effects of reducing the energy consumption and saving the equipment cost are achieved.
And the air is subjected to ageing reaction with water vapor in the wet and cold air, and the moisture content of the air is far greater than the negative pressure wind moisture content after the air is humidified by the spraying system 7, so that the ageing reaction can be performed more efficiently. The wet and cold air is forcedly mixed with the materials for reaction under the action of the guide vane 17, and the mixed material-gas mixed fluid is discharged from the air outlet 16 through the aging chamber 15.
The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, and yet fall within the scope of the invention.
Claims (6)
1. The utility model provides a gypsum evaporation cooling ageing tower, includes the barrel, and the feed inlet has been seted up to the lateral part of barrel, its characterized in that: the center of the cylinder body is provided with an evaporation chamber, a cooling chamber is formed between the inner wall of the cylinder body and the outer wall of the evaporation chamber, and the evaporation chamber is communicated with an aging chamber;
the cooling chamber is provided with a negative pressure air inlet and a feeding port, the negative pressure air inlet inputs pulse air flow, the feeding port is positioned at a high-speed air flow area of the cooling chamber, and the pulse air flow is in a rising running state so as to enable gypsum materials to rise and float to the aging chamber;
the evaporation chamber is internally provided with a multi-stage spraying system and multi-layer filler with heat exchange function, and the spraying system and the filler are alternately arranged at intervals;
the evaporation chamber is provided with an air inlet and an air outlet, and the aging chamber is positioned at the air outlet of the evaporation chamber;
the aging chamber is provided with a flow guide piece;
the side wall of the guide piece is provided with guide vanes;
the flow guide piece is positioned above the air outlet of the evaporation chamber, the upper end and the lower end of the flow guide piece are conical, and the middle of the flow guide piece is cylindrical; a plurality of inclined guide vanes are arranged on the cylindrical side wall of the guide piece;
one end of the guide vane is welded with the cylindrical barrel of the guide piece, and the other end of the guide vane is welded on the inner wall of the barrel;
the guide vane is inclined at 45-60 degrees.
2. The gypsum evaporative cooling aging tower of claim 1, wherein: the air inlet is provided with a water collecting tank, and the water collecting tank is filled with a filler with a water absorption function.
3. The gypsum evaporative cooling aging tower of claim 1, wherein: the indoor gas of cooling adopts the pulse flow.
4. The gypsum evaporative cooling aging tower of claim 1, wherein: and a supporting frame for installing the spraying system and the filler is arranged in the evaporation chamber.
5. The gypsum evaporative cooling aging tower of claim 4, wherein: the number of layers of the spraying system and the filling material can be freely combined.
6. The gypsum evaporative cooling aging tower of claim 2, wherein: the water collecting tank is provided with a liquid level meter, the liquid level meter can indicate the liquid level, and redundant water in the water collecting tank can be discharged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010307041.0A CN111377624B (en) | 2020-04-17 | 2020-04-17 | Gypsum evaporation cooling aging tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010307041.0A CN111377624B (en) | 2020-04-17 | 2020-04-17 | Gypsum evaporation cooling aging tower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111377624A CN111377624A (en) | 2020-07-07 |
| CN111377624B true CN111377624B (en) | 2023-12-22 |
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| CN202010307041.0A Active CN111377624B (en) | 2020-04-17 | 2020-04-17 | Gypsum evaporation cooling aging tower |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2116294A1 (en) * | 2008-05-09 | 2009-11-11 | Claudius Peters Technologies GmbH | Calcination method and facility |
| CN101781097A (en) * | 2009-01-16 | 2010-07-21 | 北新集团建材股份有限公司 | Airflow desulphurization gypsum calcination system |
| CN107651870A (en) * | 2017-11-07 | 2018-02-02 | 河南建筑材料研究设计院有限责任公司 | A kind of suspension air-flowing type ardealite integrated treatment unit and method |
| CN109095796A (en) * | 2018-10-30 | 2018-12-28 | 郑州三迪建筑科技有限公司 | A kind of production method of building gypsum |
| CN110963728A (en) * | 2019-12-25 | 2020-04-07 | 泰安杰普石膏科技有限公司 | Air-floating type gypsum aging equipment and using method thereof |
| CN212127990U (en) * | 2020-04-17 | 2020-12-11 | 青岛量子元基环保科技有限公司 | Gypsum evaporation cooling aging tower |
-
2020
- 2020-04-17 CN CN202010307041.0A patent/CN111377624B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2116294A1 (en) * | 2008-05-09 | 2009-11-11 | Claudius Peters Technologies GmbH | Calcination method and facility |
| CN101781097A (en) * | 2009-01-16 | 2010-07-21 | 北新集团建材股份有限公司 | Airflow desulphurization gypsum calcination system |
| CN107651870A (en) * | 2017-11-07 | 2018-02-02 | 河南建筑材料研究设计院有限责任公司 | A kind of suspension air-flowing type ardealite integrated treatment unit and method |
| CN109095796A (en) * | 2018-10-30 | 2018-12-28 | 郑州三迪建筑科技有限公司 | A kind of production method of building gypsum |
| CN110963728A (en) * | 2019-12-25 | 2020-04-07 | 泰安杰普石膏科技有限公司 | Air-floating type gypsum aging equipment and using method thereof |
| CN212127990U (en) * | 2020-04-17 | 2020-12-11 | 青岛量子元基环保科技有限公司 | Gypsum evaporation cooling aging tower |
Non-Patent Citations (1)
| Title |
|---|
| 熟石膏陈化机理的研究;李逢仁;;武汉理工大学学报(第03期);全文 * |
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| CN111377624A (en) | 2020-07-07 |
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