CN116810998A - Production process capable of reducing degradation of plant fibers in steam curing process of calcium silicate board - Google Patents
Production process capable of reducing degradation of plant fibers in steam curing process of calcium silicate board Download PDFInfo
- Publication number
- CN116810998A CN116810998A CN202310989903.6A CN202310989903A CN116810998A CN 116810998 A CN116810998 A CN 116810998A CN 202310989903 A CN202310989903 A CN 202310989903A CN 116810998 A CN116810998 A CN 116810998A
- Authority
- CN
- China
- Prior art keywords
- calcium silicate
- plant fibers
- silicate board
- anthraquinone
- plant
- 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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- 239000000835 fiber Substances 0.000 title claims abstract description 73
- 239000000378 calcium silicate Substances 0.000 title claims abstract description 39
- 229910052918 calcium silicate Inorganic materials 0.000 title claims abstract description 39
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000008569 process Effects 0.000 title claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 230000015556 catabolic process Effects 0.000 title claims abstract description 17
- 238000006731 degradation reaction Methods 0.000 title claims abstract description 17
- PYKYMHQGRFAEBM-UHFFFAOYSA-N anthraquinone Natural products CCC(=O)c1c(O)c2C(=O)C3C(C=CC=C3O)C(=O)c2cc1CC(=O)OC PYKYMHQGRFAEBM-UHFFFAOYSA-N 0.000 claims abstract description 37
- 150000004056 anthraquinones Chemical class 0.000 claims abstract description 35
- 239000003223 protective agent Substances 0.000 claims abstract description 22
- 238000004537 pulping Methods 0.000 claims abstract description 16
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 238000002791 soaking Methods 0.000 claims abstract description 7
- 239000000843 powder Substances 0.000 claims abstract description 4
- 239000002002 slurry Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- PCFMUWBCZZUMRX-UHFFFAOYSA-N 9,10-Dihydroxyanthracene Chemical compound C1=CC=C2C(O)=C(C=CC=C3)C3=C(O)C2=C1 PCFMUWBCZZUMRX-UHFFFAOYSA-N 0.000 claims description 7
- 238000010009 beating Methods 0.000 claims description 7
- -1 hydroxy-substituted anthraquinone Chemical class 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 239000011122 softwood Substances 0.000 claims description 5
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 4
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 4
- 239000000920 calcium hydroxide Substances 0.000 claims description 4
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 4
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 238000010025 steaming Methods 0.000 claims description 3
- OTBHDFWQZHPNPU-UHFFFAOYSA-N 1,2,3,4-tetrahydroanthracene-9,10-dione Chemical compound O=C1C2=CC=CC=C2C(=O)C2=C1CCCC2 OTBHDFWQZHPNPU-UHFFFAOYSA-N 0.000 claims description 2
- 230000018044 dehydration Effects 0.000 claims description 2
- 238000006297 dehydration reaction Methods 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims description 2
- 239000011812 mixed powder Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000010453 quartz Substances 0.000 claims description 2
- 239000003469 silicate cement Substances 0.000 claims description 2
- 238000003860 storage Methods 0.000 claims description 2
- 230000008961 swelling Effects 0.000 claims description 2
- 230000006872 improvement Effects 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 2
- 241000196324 Embryophyta Species 0.000 description 41
- 229920001131 Pulp (paper) Polymers 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000033116 oxidation-reduction process Effects 0.000 description 3
- 239000012783 reinforcing fiber Substances 0.000 description 3
- 239000012670 alkaline solution Substances 0.000 description 2
- JPUUAYFQHNNDBM-UHFFFAOYSA-N bicyclo[4.1.0]hepta-1(6),3-diene-2,5-dione Chemical group O=C1C=CC(=O)C2=C1C2 JPUUAYFQHNNDBM-UHFFFAOYSA-N 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 229920005610 lignin Polymers 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000010257 thawing Methods 0.000 description 2
- 244000198134 Agave sisalana Species 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
- B28B17/02—Conditioning the material prior to shaping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a production process capable of reducing degradation of plant fibers in a steam curing process of a calcium silicate board, and relates to the field of production and processing of the calcium silicate board. The method comprises the following steps: soaking plant fibers; breaking plant fiber; pulping plant fibers; adding anthraquinone protective agent into plant fiber; preparing a blank by mixing powder; and (5) maintaining and forming the blank plate. The anthraquinone protective agent is added into the pulped plant fibers and then mixed with the powder to prepare the calcium silicate board, so that the flexural strength of the prepared calcium silicate board is greatly improved, and the prepared calcium silicate board has better performance and wider application range. The anthraquinone protective agent is simple, convenient and quick to add, has lower cost compared with other improvement modes, and is more suitable for mass production.
Description
Technical Field
The invention relates to the field of calcium silicate board production and processing, in particular to a production process capable of reducing degradation of plant fibers in a steam curing process of a calcium silicate board.
Background
The calcium silicate board is prepared by taking siliceous materials (mainly silicon dioxide) and calcareous materials (mainly slaked lime, cement and the like) as cementing materials and plant fibers as reinforcing materials and performing processes of mixing pulping, papermaking or pulp flowing forming, high-temperature high-pressure steam curing and the like. The light-weight high-strength anti-corrosion mothproof decorative material has the advantages of light weight, high strength, high workability, diversified appearance effects and the like, and is widely applied to building outer walls and interior decorations of subways, airports, markets, exhibition halls and other places. In the preparation process of the calcium silicate board, cement, slaked lime and water are mixed to form a strong alkaline system, the pH value is about 11-13, plant reinforcing fibers are easily degraded in the high-temperature steam curing (175-180 ℃) process, the strength and toughness of the plant reinforcing fibers are reduced, the bonding strength between the plant reinforcing fibers and the board is reduced, and the bending strength and durability of the board are adversely affected.
In order to alleviate degradation of plant reinforced fibers under alkaline conditions, the urea resin solution, the silane coupling agent and the like are respectively adopted for treating the fiber surfaces and preparing the plates in the performance study of plant fiber reinforced cement-based composite materials and the performance study of modified sisal fiber reinforced cement mortar. Although the degradation of plant fibers is reduced to a certain extent, the flexural strength of the plate is improved, the production cost and the complexity of the production process are greatly increased, and the long-term development of the calcium silicate plate industry is not facilitated.
Disclosure of Invention
The solution of the invention for the problems existing in the prior art is as follows:
a process for reducing degradation of plant fibre in steaming process of calcium silicate board includes such steps as adding anthraquinone protecting agent to plant fibre in preparing calcium silicate board, and stirring.
As one of the preferable technical schemes, the method is characterized by comprising the following steps:
step A: soaking plant fibers; adding plant fibers into water, fully soaking and swelling;
and (B) step (B): breaking plant fiber; crushing the infiltrated slurry;
step C: pulping plant fibers; pulping the crushed plant fiber slurry;
step D: adding anthraquinone protective agent into plant fiber; conveying the pulped plant fiber slurry to a slurry storage tower, adding anthraquinone protective agent, and stirring and mixing;
step E: preparing a blank from the mixed powder, stirring and mixing the slurry obtained in the step D with quartz powder, silicate cement, slaked lime and water materials, and preparing the mixture into a blank plate through a copying dehydration process;
step F: and E, curing and forming the blank, and curing the blank in the step E by pre-curing and autoclaving to obtain the plant fiber reinforced calcium silicate board.
As one of the preferable technical schemes, the plant fiber in the step A is commercial unbleached sulfate softwood pulp; the soaking concentration is 5-10%, and the water temperature is 60-80 ℃; and B, crushing the plant fibers by adopting a hydraulic pulper, wherein the concentration of the pulp is 3-6%, and the pulping time is 20-40 min.
As one of the preferable technical schemes, the step C is carried out impurity removal and concentration adjustment before beating treatment, and then the pulp is conveyed to a disc mill beating machine for beating treatment; the beating concentration of the plant fiber is 6-10%, and the beating degree of the pulp is 35-45 DEG SR.
As one of the preferred technical schemes, the anthraquinone protective agent in the step D comprises one or more of anthraquinone, anthrahydroquinone, tetrahydroanthraquinone and hydroxy substituted anthraquinone.
As one of the preferable technical schemes, the dosage of the anthraquinone protective agent is 0.05-0.5% of the absolute dry weight of the plant fiber. The stirring speed of the stirring and mixing procedure in the step D is 30-40r/min, the stirring time is 3-12 h, and the temperature of the slurry is 40-60 ℃.
As one of the preferable technical schemes, the thickness of the blank plate in the step E is 8+/-0.3 mm, the density is 1.20+/-0.5 g/m < 3 >, and the water content is 30-40%.
A calcium silicate board manufactured by the production process according to any one of the technical proposal.
The protection mechanism of the invention is as follows: the added anthraquinone can oxidize the reducing terminal group of the wood pulp fiber into carboxyl to avoid peeling reaction of the plant fiber, and the anthraquinone itself is reduced into anthrahydroquinone. Meanwhile, in alkaline solution, anthrahydroquinone is ionized into anthrahydroquinone ion, and then exchanged into anthraphenol ketone ion to react with the methylene quinone structure of lignin in the plant fiber, and the anthraquinone ketone ion is changed back into anthraquinone again to continue to oxidize the wood pulp fiber. Thus, the oxidation-reduction circulation effect can protect wood pulp fibers, improve the yield and accelerate the delignification reaction.
The invention has the beneficial effects that: according to the invention, the anthraquinone additive is added to effectively protect plant fibers, so that the degradation condition of the plant fibers in the steam curing process of the calcium silicate board is reduced, the drawing strength of the prepared calcium silicate board is greatly improved, and the prepared calcium silicate board has better performance and wider application range. The anthraquinone protective agent is simple, convenient and quick to add, has lower cost compared with other improvement modes, and is more suitable for mass production.
Drawings
FIG. 1 is a flow chart of a production process for reducing degradation of plant fibers in a calcium silicate board steam curing process according to the present invention.
FIG. 2 is a table comparing the performance test results of the produced calcium silicate board of the present invention for reducing degradation of plant fibers during steam curing of the calcium silicate board.
Detailed Description
The present invention will be described in further detail with reference to examples, but embodiments of the present invention are not limited thereto.
Unless specifically stated otherwise, the reagents, methods and apparatus employed in the present invention are those conventional in the art. The reagents and starting materials used in the present invention are commercially available unless otherwise specified.
The plant fiber is commercial unbleached sulfate softwood pulp, and the weight average length distribution of the plant fiber is 2-3 mm.
Example 1: the production process for reducing the degradation of plant fibers in the steam curing process of the calcium silicate board comprises the following steps:
step A: plant fiber is soaked, unbleached sulfate softwood pulp is soaked in water in a vehicle to make the softwood pulp fully wet and expand, the water temperature is 60 ℃, and the concentration of soaked pulp is 10%.
And (B) step (B): plant fiber is crushed, and is crushed by a hydraulic pulper, wherein the pulping time is 30 min, and the pulping concentration is 4%.
Step C: pulping plant fiber, screening, removing slag, pulping to obtain pulp with pulp concentration of 6% and pulp degree of 40 ° SR.
Step D: adding anthraquinone protectant into plant fiber, adding anthraquinone protectant with oven dry mass of 0.05% into plant fiber when the concentration of pulp is adjusted to 5%, stirring at 30 r/min for 6 h and 50 deg.C, wherein the mixture mainly comprises one or more of anthraquinone, anthrahydroquinone, tetrahydroanthraquinone and hydroxy substituted anthraquinone.
Step E: and D, preparing a blank by using the mixed powder, stirring and mixing the slurry obtained in the step D with materials such as quartz powder, silicate cement, slaked lime, water and the like according to a certain proportion, and preparing the blank by using the mixed material through a copying dehydration process. The stirring speed is 30 r/min, and the stirring time is 30 min; and then the plate blank is manufactured by a full-automatic flow pulp production process, the thickness of the manufactured plate blank is 8+/-0.3 mm, the density is 1.20+/-0.5 g/m < 3 >, and the water content is 30%.
Step F: and (3) curing and forming the blank, naturally curing the blank in the step (5) in a pre-curing kiln with 60% of humidity for 8 h to enable the blank to have certain strength, demolding and stacking the blank, and then conveying the blank into a high-temperature and high-pressure autoclave for steaming and curing to obtain the plant fiber reinforced calcium silicate board.
Example 2: this embodiment is similar to embodiment 1 except that: and D, adjusting the dosage of the anthraquinone protective agent added in the step D to be 0.20% of the absolute dry mass of the plant fiber by a controlled variable method.
Example 3: this embodiment is similar to embodiment 1 except that: and D, adjusting the dosage of the anthraquinone protective agent added in the step D to be 0.35% of the absolute dry mass of the plant fiber by a controlled variable method.
Example 4: this embodiment is similar to embodiment 1 except that: and D, adjusting the dosage of the anthraquinone protective agent added in the step D to be 0.5% of the absolute dry mass of the plant fiber by a controlled variable method.
Comparative example 1: this embodiment is similar to embodiment 1 except that: and (3) adjusting the dosage of the anthraquinone protective agent added in the step (4) to be 0% of the absolute dry mass of the plant fiber by a controlled variable method, namely, not adding the anthraquinone protective agent.
Experimental data and summary are performed: the plant fiber reinforced calcium silicate boards prepared in examples 1 to 4 and comparative example 1 were tested for wet expansion rate, freeze thawing resistance, flexural strength, and pull strength; wherein, the water content, the humidity and the expansion rate, the freezing resistance and the flexural strength are measured by using GB/T7019-2014; the test results are shown in table 1 of fig. 2. As can be seen from the results of Table 1, the plant fiber reinforced calcium silicate boards prepared by adding the anthraquinone-based protective agent of the present invention have better properties than those prepared without adding the anthraquinone-based protective agent, such as wet expansion rate, freeze-thawing resistance, flexural strength, drawing strength, etc., as can be seen from examples 1 to 4 and comparative example 1. The flexural strength and the drawing strength are improved to a certain extent, and the flexural strength is improved from 18MPa to 25MPa by 38%. The drawing strength is improved from 1.16MPa to 1.26MPa, and the drawing strength is improved by 8.6%.
Interpretation of the mechanism of the test results: anthraquinone protective agent and its analogues (anthraquinone, anthrahydroquinone, modified anthraquinone) can oxidize the reducing terminal group of wood pulp fiber into carboxyl under high temperature and high alkalinity condition in pulping and steaming section to avoid peeling reaction of plant fiber, and anthraquinone itself is reduced into anthrahydroquinone. Meanwhile, in alkaline solution, anthrahydroquinone is ionized into anthrahydroquinone ion, and then exchanged into anthraphenol ketone ion to react with the methylene quinone structure of lignin in the plant fiber, and the anthraquinone ketone ion is changed back into anthraquinone again to continue to oxidize the wood pulp fiber. Thus, the oxidation-reduction circulation effect can protect wood pulp fibers, improve the yield and accelerate the delignification reaction. Therefore, the characteristics of anthraquinone and analogues thereof are fully utilized, and the anthraquinone can be applied to the preparation of the calcium silicate board, so that the performance of the calcium silicate board can be effectively improved.
Conclusion: by adding a proper amount of anthraquinone protective agent, the oxidation-reduction circulation effect of the protective agent can protect wood pulp fibers to improve the yield and accelerate the delignification reaction. The flexural strength of the prepared calcium silicate board is greatly improved, and the prepared calcium silicate board has better performance and wider application range. The anthraquinone protective agent is simple, convenient and quick to add, has lower cost compared with other improvement modes, and is more suitable for mass production.
The invention is not limited to the embodiments disclosed and described above, but rather, it is intended to cover modifications and variants of the invention which fall within the scope of the appended claims, depending on the description and the specific examples.
Claims (8)
1. A production process capable of reducing degradation of plant fibers in a calcium silicate board steaming process is characterized by comprising the steps of adding anthraquinone protective agents into plant fibers in a calcium silicate board manufacturing process and stirring and mixing.
2. The process for producing the calcium silicate board capable of reducing degradation of plant fibers in the steam curing process according to claim 1, comprising the following steps:
step A: soaking plant fibers; adding plant fibers into water, fully soaking and swelling;
and (B) step (B): breaking plant fiber; crushing the infiltrated slurry;
step C: pulping plant fibers; pulping the crushed plant fiber slurry;
step D: adding anthraquinone protective agent into plant fiber; conveying the pulped plant fiber slurry to a slurry storage tower, adding anthraquinone protective agent, and stirring and mixing;
step E: preparing a blank from the mixed powder, stirring and mixing the slurry obtained in the step D with quartz powder, silicate cement, slaked lime and water materials, and preparing the mixture into a blank plate through a copying dehydration process;
step F: and E, curing and forming the blank, and curing the blank in the step E by pre-curing and autoclaving to obtain the plant fiber reinforced calcium silicate board.
3. The process for producing a calcium silicate board capable of reducing degradation of plant fibers in a steam curing process according to claim 2, wherein the plant fibers in the step a are commercial unbleached sulfate softwood pulp; the soaking concentration is 5-10%, and the water temperature is 60-80 ℃; and B, crushing the plant fibers by adopting a hydraulic pulper, wherein the concentration of the pulp is 3-6%, and the pulping time is 20-40 min.
4. The production process capable of reducing degradation of plant fibers in the steam curing process of the calcium silicate board according to claim 2, wherein the pulping treatment in the step C is carried out by removing impurities, adjusting concentration, and then conveying to a disc mill pulping machine for pulping treatment; the beating concentration of the plant fiber is 6-10%, and the beating degree of the pulp is 35-45 DEG SR.
5. The process for producing a calcium silicate board according to claim 2, wherein the anthraquinone protecting agent in step D comprises one or more of anthraquinone, anthrahydroquinone, tetrahydroanthraquinone, and hydroxy-substituted anthraquinone.
6. The process for reducing the degradation of plant fibers during the steam curing of calcium silicate boards according to claim 5, wherein the anthraquinone protectant is used in an amount of 0.05-0.5% by weight based on the absolute dry weight of plant fibers. The stirring speed of the stirring and mixing procedure in the step D is 30-40r/min, the stirring time is 3-12 h, and the temperature of the slurry is 40-60 ℃.
7. The process for reducing the degradation of plant fibers during steam curing of calcium silicate boards according to claim 2, wherein the thickness of the board in step E is 8±0.3. 0.3 mm, the density is 1.20±0.5 g/m3, and the moisture content is 30-40%.
8. A calcium silicate board, characterized in that it is produced by the production process according to any one of the preceding claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310989903.6A CN116810998A (en) | 2023-08-07 | 2023-08-07 | Production process capable of reducing degradation of plant fibers in steam curing process of calcium silicate board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310989903.6A CN116810998A (en) | 2023-08-07 | 2023-08-07 | Production process capable of reducing degradation of plant fibers in steam curing process of calcium silicate board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116810998A true CN116810998A (en) | 2023-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310989903.6A Pending CN116810998A (en) | 2023-08-07 | 2023-08-07 | Production process capable of reducing degradation of plant fibers in steam curing process of calcium silicate board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116810998A (en) |
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2023
- 2023-08-07 CN CN202310989903.6A patent/CN116810998A/en active Pending
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