CN117049829B - Calcium silicate board doped with purified cotton pulp sludge and preparation method thereof - Google Patents
Calcium silicate board doped with purified cotton pulp sludge and preparation method thereof Download PDFInfo
- Publication number
- CN117049829B CN117049829B CN202311023025.9A CN202311023025A CN117049829B CN 117049829 B CN117049829 B CN 117049829B CN 202311023025 A CN202311023025 A CN 202311023025A CN 117049829 B CN117049829 B CN 117049829B
- Authority
- CN
- China
- Prior art keywords
- sludge
- cotton pulp
- purified cotton
- calcium silicate
- silicate board
- 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.)
- Active
Links
- 239000010802 sludge Substances 0.000 title claims abstract description 129
- 229920000742 Cotton Polymers 0.000 title claims abstract description 96
- 239000000378 calcium silicate Substances 0.000 title claims abstract description 49
- 229910052918 calcium silicate Inorganic materials 0.000 title claims abstract description 49
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 238000002360 preparation method Methods 0.000 title abstract description 17
- 238000001035 drying Methods 0.000 claims abstract description 38
- 238000003756 stirring Methods 0.000 claims abstract description 22
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000004568 cement Substances 0.000 claims abstract description 19
- 239000006004 Quartz sand Substances 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000002002 slurry Substances 0.000 claims abstract description 14
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 18
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 13
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 13
- 238000005520 cutting process Methods 0.000 claims description 10
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 2
- 239000000835 fiber Substances 0.000 abstract description 29
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000007493 shaping process Methods 0.000 abstract description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- 239000002245 particle Substances 0.000 description 7
- 239000007789 gas Substances 0.000 description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000010298 pulverizing process Methods 0.000 description 4
- 238000007670 refining Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 208000005156 Dehydration Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/0481—Other specific industrial waste materials not provided for elsewhere in C04B18/00
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/04—Heat treatment
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the technical field of plates, and discloses a calcium silicate plate doped with purified cotton pulp sludge and a preparation method thereof. Firstly, crushing refined cotton pulp fiber sludge, mixing the crushed refined cotton pulp fiber sludge with cement and quartz sand, and adding water to stir the mixture into slurry; then adding paper pulp into the slurry, and uniformly stirring; finally, the calcium silicate board is obtained through the processes of shoveling, shaping, precuring, autoclaved curing and drying. According to the invention, purified cotton pulp sludge is used for replacing cotton pulp fibers or plant fibers, so that the waste is effectively utilized, the environment is protected, and the production cost of the calcium silicate board is reduced.
Description
Technical Field
The invention relates to the technical field of plates, in particular to a calcium silicate plate doped with purified cotton pulp sludge and a preparation method thereof.
Background
The calcium silicate board is a novel inorganic building material and has excellent fireproof performance, moistureproof performance and sound insulation effect. The calcium silicate board can be used as a heat-insulating material or a decorative material. The calcium silicate board for heat preservation is mainly used for exterior wall cladding, exterior wall veneering and the like. The decorative calcium silicate board is mainly used for suspended ceilings, house partition walls, indoor floors and the like. With the continuous expansion of the market of heat-insulating decorative finished boards, the demand of calcium silicate boards is also increased.
With the development of refined cotton pulp industry and the construction of pollution control facilities, the sludge generated after cotton pulp wastewater is treated by treatment facilities becomes a new pollution source. It is known that the amount of sludge produced after the wastewater of refined cotton pulp with annual production of 50 ten thousand tons is about 2500 tons. Except for part of the sludge being comprehensively utilized, the rest is sanitary landfill treatment, and 700 mu of land is needed to be filled, so that the land resource is wasted, and secondary pollution is generated. Therefore, how to effectively and environmentally realize the reuse of purified cotton pulp sludge is a problem to be solved urgently.
Chinese patent publication No. CN113372050 discloses a high-strength calcium silicate board and a preparation method thereof, firstly, cotton pulp and special cotton pulp are mixed and stirred uniformly to prepare a prefabricated pulp, then cement and quartz sand are mixed into the prefabricated pulp, finally, the prefabricated pulp is sent into a board making machine to prepare a blank board, and the blank board is put into a mould for press molding, and then the board is obtained after demoulding.
Chinese patent publication No. CN104926236 discloses a low-density fiber reinforced calcium silicate fireproof board and a preparation method thereof, the method comprising: step 1, mixing plant fibers, cement and quartz stone for pulping, wherein the molar ratio of calcium to silicon is 0.80-0.82, and the mass of the plant fibers accounts for 8-12% of the total weight of the raw materials; step 2, forming a plate into a blank, and preparing a blank; step 3, pre-reaction: placing the blank in a reaction kettle, and pressing in the reaction kettle
Under 1.2+/-0.1 Mpa, the temperature is steadily raised to 250 ℃ at a heating rate of 30 ℃/h from the time when steam enters the reaction kettle, and then constant temperature and pressure maintaining are carried out for not less than 24 hours; step 4, autoclaved curing; and 5, demolding, drying and polishing edges to obtain the low-density fiber reinforced calcium silicate fireproof plate.
In the prior art, cotton pulp fibers and plant fibers are added into the calcium silicate board, so that the raw material cost of the calcium silicate board is increased.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provides a calcium silicate board doped with purified cotton pulp sludge and a preparation method thereof. According to the invention, purified cotton pulp sludge is used for replacing cotton pulp fibers or plant fibers, so that the waste is effectively utilized, the environment is protected, and the production cost of the calcium silicate board is reduced.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the calcium silicate board material doped with the purified cotton pulp sludge comprises the following components in parts by weight of dry weight:
30-35 parts of cement
40-50 Parts of quartz sand
10-15 Parts of purified cotton pulp sludge
4-7 Parts of paper pulp.
In the prior art, a large amount of purified cotton pulp sludge is produced by producing cotton pulp fibers, and most of the sludge is treated by landfill or incineration, so that not only is land resources wasted, but also secondary pollution is caused to the environment. The purified cotton pulp sludge belongs to biological solid waste, and contains a large amount of cellulose organic matters and organic matters, such as fine fibers, short fibers and coarse slag.
Preferably, the drying treatment method of the purified cotton pulp sludge comprises the following steps:
1) Dehydrating the purified cotton pulp sludge, and adding sodium bicarbonate to obtain a sludge mixed material;
2) Cutting the sludge mixed material into strips;
3) Carrying out heat drying treatment on the sludge subjected to the slitting treatment;
4) Naturally airing the sludge after the heat drying treatment.
Because of the existence of volatile micromolecular organic matters and a large amount of solid suspended matters in the cotton pulp sludge, the cotton pulp sludge can release toxic and effective gases and peculiar smell when being directly used for the calcium silicate board, and is harmful to human health. Therefore, the invention firstly carries out mechanical dehydration treatment on the refined cotton pulp fiber, filters out most of water and large-particle solid suspended matters, and then heats and dries the cotton pulp fiber to volatilize and remove harmful organic matters. Further, there is a problem that the dried purified cotton pulp sludge is difficult to wet and disperse in the raw material components of the calcium silicate board, and most of the purified cotton pulp sludge is mixed into the board in the form of particles, so that the strength of the board is limited. In order to solve the problem, a small amount of sodium bicarbonate is added into the purified cotton pulp sludge, carbon dioxide gas is released during the baking process of the sodium bicarbonate, on one hand, the release and escape of the carbon dioxide gas can promote the volatilization of harmful substances, on the other hand, the release of the carbon dioxide gas enables the inside of the sludge to form a loose hole structure, in the preparation process of the calcium silicate board, the purified cotton pulp sludge with the loose hole structure is contacted with moisture, the moisture easily enters the hole structure of the sludge, so that the granular purified cotton pulp sludge is wetted and dispersed, and fine fibers and short fibers in the granular purified cotton pulp sludge are fully and uniformly released and dispersed in the calcium silicate board, so that the strength of the calcium silicate board is remarkably improved.
Preferably, the water content of the purified cotton pulp sludge in the step 1) is controlled to be 50-65% after the sludge is dehydrated;
the addition amount of the sodium bicarbonate is more than 0.5% of the mass of the purified cotton pulp sludge.
When the addition amount of sodium bicarbonate is below 1.5%, sodium bicarbonate is insufficient to release enough carbon dioxide gas to form a loose pore structure inside the cotton pulp sludge, so that the addition amount of sodium bicarbonate is controlled to be more than 0.5% of the mass of the purified cotton pulp sludge.
Preferably, the baking temperature in the step 3) is 100-200 ℃.
Preferably, the hot baking time in the step 3) is 30-50min.
The preparation method of the calcium silicate board doped with the purified cotton pulp sludge comprises the following steps:
a) Crushing refined cotton pulp fiber sludge, mixing the crushed refined cotton pulp fiber sludge with cement and quartz sand, adding water, and stirring to form slurry;
b) Adding paper pulp into the slurry, and uniformly stirring;
c) The calcium silicate board is obtained through the processes of shoveling, shaping, precuring, autoclaved curing and drying.
Preferably, the stirring time in the step a is 30-40min.
Preferably, the stirring time in the step b is controlled to be 20-30min.
Preferably, the pre-curing treatment temperature in the step c is 80-90 ℃ and the time is 6-18h; the autoclaved curing temperature is 170-180 ℃ and the time is 10-24h.
The invention has the following beneficial effects:
(1) According to the invention, purified cotton pulp sludge is used for replacing cotton pulp fibers or plant fibers used in the prior art, so that the waste is effectively utilized, the environment is protected, and the production cost of the calcium silicate board is reduced;
(2) The refined cotton pulp sludge is dried and crushed to form sludge particles, the inside of the sludge particles is of a loose hole structure, moisture easily enters the inside of the sludge particles to moisten the inside of the sludge particles, so that the fine fibers and the short fibers in the inside of the sludge particles are fully released and dispersed, and the strength of the calcium silicate board is obviously improved.
Detailed Description
The technical scheme of the invention is further described through specific embodiments. The materials and equipment used in the present invention are commercially available or those commonly used in the art, and the methods in the examples are conventional in the art unless otherwise specified.
Example 1
Drying treatment of purified cotton pulp sludge:
1) Mechanically dehydrating the purified cotton pulp sludge to control the water content of the sludge to be 65%, and adding sodium bicarbonate with the addition amount of 0.5% of the mass of the purified cotton pulp sludge to obtain a sludge mixed material;
2) Cutting the sludge into strips by a strip cutter on a conveyor belt;
3) Feeding the sludge subjected to the strip cutting treatment into a dryer for heat drying treatment, wherein the heat drying temperature is 200 ℃, and the heat drying time is 30min;
4) Naturally airing the sludge after the heat drying treatment or naturally airing the sludge.
The calcium silicate board material doped with the purified cotton pulp sludge comprises the following components in parts by weight of dry weight:
35 parts of cement
50 Parts of quartz sand
Purified cotton pulp sludge 15 parts
7 Parts of paper pulp.
The preparation method of the calcium silicate board for refining the cotton pulp sludge comprises the following steps:
a) Pulverizing refined cotton pulp fiber sludge, mixing with cement and quartz sand, adding water, and stirring to obtain slurry, wherein the addition amount of water is the total weight of cement, quartz sand and refined cotton pulp sludge, and the stirring time is 40min;
b) Adding paper pulp into the slurry, and uniformly stirring for 30min in the step b;
c) The preparation method comprises the steps of forming through shoveling, pre-curing, autoclaved curing and drying, wherein the pre-curing temperature is 90 ℃ and the time is 6 hours; the autoclaved curing temperature is 180 ℃ and the time is 10 hours, and the calcium silicate board is obtained.
Example 2
Drying treatment of purified cotton pulp sludge:
1) Mechanically dehydrating the purified cotton pulp sludge to control the water content of the sludge to be 50%, and adding sodium bicarbonate with the addition amount of 0.6% of the mass of the purified cotton pulp sludge to obtain a sludge mixed material;
2) Cutting the sludge into strips by a strip cutter on a conveyor belt;
3) Feeding the sludge subjected to the strip cutting treatment into a dryer for heat drying treatment, wherein the heat drying temperature is 100 ℃, and the heat drying time is 50min;
4) Naturally airing the sludge after the heat drying treatment or naturally airing the sludge.
The calcium silicate board material doped with the purified cotton pulp sludge comprises the following components in parts by weight of dry weight:
30 parts of cement
40 Parts of quartz sand
Purified cotton pulp sludge 10 parts
4 Parts of paper pulp.
The preparation method of the calcium silicate board for refining the cotton pulp sludge comprises the following steps:
a) Pulverizing refined cotton pulp fiber sludge, mixing with cement and quartz sand, adding water, and stirring to obtain slurry, wherein the addition amount of water is the total weight of cement, quartz sand and refined cotton pulp sludge, and the stirring time is 30min;
b) Adding paper pulp into the slurry, and uniformly stirring for 20min in the step b;
c) The preparation method comprises the steps of forming through shoveling, pre-curing, autoclaved curing and drying, wherein the pre-curing temperature is 80 ℃ and the time is 18 hours; the autoclaved curing temperature is 170 ℃ and the time is 24 hours, and the calcium silicate board is obtained.
Example 3
Drying treatment of purified cotton pulp sludge:
1) Mechanically dehydrating the purified cotton pulp sludge to control the water content of the sludge to be 55%, and adding sodium bicarbonate with the addition amount of more than 0.7% of the mass of the purified cotton pulp sludge to obtain a sludge mixed material;
2) Cutting the sludge into strips by a strip cutter on a conveyor belt;
3) Feeding the sludge subjected to the strip cutting treatment into a dryer for heat drying treatment, wherein the heat drying temperature is 150 ℃, and the heat drying time is 40min;
4) Naturally airing the sludge after the heat drying treatment or naturally airing the sludge.
The calcium silicate board material doped with the purified cotton pulp sludge comprises the following components in parts by weight of dry weight:
32 parts of cement
43 Parts of quartz sand
Purified cotton pulp sludge 12 parts
5 Parts of paper pulp.
The preparation method of the calcium silicate board for refining the cotton pulp sludge comprises the following steps:
a) Pulverizing refined cotton pulp fiber sludge, mixing with cement and quartz sand, adding water, and stirring to obtain slurry, wherein the addition amount of water is the total weight of cement, quartz sand and refined cotton pulp sludge, and the stirring time is 35min;
b) Adding paper pulp into the slurry, and uniformly stirring for 25min in the step b;
c) The preparation method comprises the steps of forming through shoveling, pre-curing, autoclaved curing and drying, wherein the pre-curing temperature is 85 ℃ and the time is 10 hours; the autoclaved curing temperature is 175 ℃ and the time is 20 hours, and the calcium silicate board is obtained.
Example 4
Drying treatment of purified cotton pulp sludge:
1) Mechanically dehydrating the purified cotton pulp sludge to control the water content of the sludge to be 60%, and adding sodium bicarbonate with the addition amount of 0.8% of the mass of the purified cotton pulp sludge to obtain a sludge mixed material;
2) Cutting the sludge into strips by a strip cutter on a conveyor belt;
3) Feeding the sludge subjected to the strip cutting treatment into a dryer for heat drying treatment, wherein the heat drying temperature is 150 ℃, and the heat drying time is 40min;
4) Naturally airing the sludge after the heat drying treatment or naturally airing the sludge.
The calcium silicate board material doped with the purified cotton pulp sludge comprises the following components in parts by weight of dry weight:
32 parts of cement
45 Parts of quartz sand
13 Parts of purified cotton pulp sludge
5 Parts of paper pulp.
The preparation method of the calcium silicate board for refining the cotton pulp sludge comprises the following steps:
a) Pulverizing refined cotton pulp fiber sludge, mixing with cement and quartz sand, adding water, and stirring to obtain slurry, wherein the addition amount of water is the total weight of cement, quartz sand and refined cotton pulp sludge, and the stirring time is 35min;
b) Adding paper pulp into the slurry, and uniformly stirring for 25min in the step b;
c) The preparation method comprises the steps of forming through shoveling, pre-curing, autoclaved curing and drying, wherein the pre-curing temperature is 85 ℃ and the time is 12 hours; the autoclaved curing temperature is 175 ℃ and the time is 20 hours, and the calcium silicate board is obtained.
Comparative example 1
Comparative example 1 differs from example 1 in that the drying treatment step of the purified cotton pulp sludge is performed without adding sodium bicarbonate to the purified cotton pulp sludge in the drying treatment step 1).
Comparative example 2
Comparative example 1 differs from example 1 in the drying treatment step of the purified cotton pulp sludge, in which the amount of sodium bicarbonate added to the purified cotton pulp sludge in the drying treatment step 1) is 0.3% of the mass of the purified cotton pulp sludge.
Performance testing
The strength of the calcium silicate board was tested according to CB/T8040, and the test results are as follows:
The present invention is not limited to the above-mentioned embodiments, but is intended to be limited to the above-mentioned embodiments, and any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical matters of the present invention will fall within the scope of the present invention without departing from the technical scope of the present invention.
Claims (7)
1. The calcium silicate board doped with the purified cotton pulp sludge is characterized by comprising the following components in parts by weight of dry weight:
30-35 parts of cement
40-50 Parts of quartz sand
10-15 Parts of purified cotton pulp sludge
4-7 Parts of paper pulp;
the drying treatment method for the purified cotton pulp sludge comprises the following steps of:
1) Dehydrating the purified cotton pulp sludge, controlling the water content of the sludge after dehydrating the purified cotton pulp sludge to be 50-65%, and adding sodium bicarbonate, wherein the addition amount of the sodium bicarbonate is more than 0.5% of the mass of the purified cotton pulp sludge to obtain a sludge mixed material;
2) Cutting the sludge mixed material into strips;
3) Carrying out heat drying treatment on the sludge subjected to the slitting treatment;
4) Naturally airing or naturally airing the sludge after the heat drying treatment.
2. The calcium silicate board blended with purified cotton pulp sludge according to claim 1, wherein the baking temperature in the step 3) is 100-200 ℃.
3. The calcium silicate board blended with purified cotton pulp sludge according to claim 1, wherein the baking time in the step 3) is 30-50min.
4. A method for preparing a calcium silicate board material blended with purified cotton pulp sludge according to any one of claims 1 to 3, comprising the steps of:
a) Crushing purified cotton pulp sludge, mixing the crushed purified cotton pulp sludge with cement and quartz sand, and adding water to stir the mixture into slurry;
b) Adding paper pulp into the slurry, and uniformly stirring;
c) And (5) performing shoveling and forming, pre-curing, autoclaved curing and drying to obtain the calcium silicate board.
5. The calcium silicate board material mixed with purified cotton pulp sludge according to claim 4, wherein the stirring time in the step a is 30-40min.
6. The calcium silicate board material mixed with purified cotton pulp sludge according to claim 4, wherein the stirring time in the step b is 20-30min.
7. The calcium silicate board doped with purified cotton pulp sludge according to claim 4, wherein the pre-curing treatment temperature in the step c is 80-90 ℃ for 6-18h; the autoclaved curing temperature is 170-180 ℃ and the time is 10-24h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311023025.9A CN117049829B (en) | 2023-08-15 | 2023-08-15 | Calcium silicate board doped with purified cotton pulp sludge and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311023025.9A CN117049829B (en) | 2023-08-15 | 2023-08-15 | Calcium silicate board doped with purified cotton pulp sludge and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117049829A CN117049829A (en) | 2023-11-14 |
| CN117049829B true CN117049829B (en) | 2024-07-19 |
Family
ID=88663936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311023025.9A Active CN117049829B (en) | 2023-08-15 | 2023-08-15 | Calcium silicate board doped with purified cotton pulp sludge and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117049829B (en) |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5275733A (en) * | 1990-11-30 | 1994-01-04 | N-Viro Energy Systems Ltd. | Process to stabilize wastewater sludge |
| JPH07500286A (en) * | 1992-03-30 | 1995-01-12 | メグ エッセ．エネ．チ．ディ スコペッリティ ソフィア アンド チ． | water composition |
| TWI225441B (en) * | 2002-07-09 | 2004-12-21 | Stone Wastes Recovery Treat Co | Method of using stone mud as a source for producing cement fiberboards |
| CA2472879A1 (en) * | 2004-06-29 | 2005-12-29 | Institut National De La Recherche Scientifique | Electrochemical stabilization and preconditioning process for municipal and industrial sludge |
| CN101618934B (en) * | 2009-07-21 | 2012-03-21 | 武汉国力通化工环保科技有限公司 | Sludge dry powder and preparation method thereof |
| CN102225830A (en) * | 2011-05-18 | 2011-10-26 | 安徽雷克环保科技有限公司 | Resource treatment method for urban sludge |
| CN105150343A (en) * | 2015-07-15 | 2015-12-16 | 百仪家具有限公司 | High-density fiberboard with absorption performance enhanced by adding modified paper sludge and preparation method thereof |
| CN105016663B (en) * | 2015-08-06 | 2017-03-08 | 济南大学 | A kind of calcium silicate board containing paper mill sludge ash and preparation method thereof |
| CN107555951B (en) * | 2017-08-25 | 2020-09-25 | 昆明理工大学 | Water-retaining porous brick for sponge city and preparation method thereof |
| KR102025410B1 (en) * | 2017-10-18 | 2019-09-25 | 최지아 | structure of multi composite tile panel |
| CN111320488A (en) * | 2020-04-14 | 2020-06-23 | 漳州市松福新型建材有限公司 | Preparation method of coal gangue baked brick |
| CN113372050B (en) * | 2021-07-30 | 2022-04-26 | 浙江碧蓝云鼎控股有限公司 | High-strength calcium silicate board and preparation method thereof |
-
2023
- 2023-08-15 CN CN202311023025.9A patent/CN117049829B/en active Active
Non-Patent Citations (1)
| Title |
|---|
| "造纸污泥对水泥基硅酸钙板及保温砂浆性能的影响";陈明旭;《中国优秀硕士学位论文全文数据库》;20180315;第12页 2.2，第29-33页 4.1-4.3 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117049829A (en) | 2023-11-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104230280B (en) | Low-shrinkage sludge ceramsite alkali-activated full-slag foam concrete plate and preparation method thereof | |
| US9724853B2 (en) | Building method to produce lightweight building blocks from cellulose fibre | |
| CN111217560A (en) | Asbestos-free straw fiber reinforced cement board and preparation method thereof | |
| CN104030637A (en) | Bamboo charcoal fiber concrete material and preparation method thereof | |
| CN111217580B (en) | Aerated concrete containing sludge gasification dry distillation residues and preparation method thereof | |
| CN111233424A (en) | Building board prepared by taking coal-based solid waste as raw material and method | |
| CN112479663A (en) | Calcium silicate board prepared from industrial solid wastes and preparation method thereof | |
| CN109020340A (en) | A method of calcium silicate board is prepared using calcium silicate board leftover pieces | |
| CN111196700A (en) | Environment-friendly baking-free brick prepared from sludge and furnace slag and preparation method thereof | |
| FI69161C (en) | FOERFARANDE FOER FRAMSTAELLNING AV SVAORTAENDLIGA ELLER OBRAENNBARA PRODUKTER AV FIBROEST MATERIAL | |
| CN112830722B (en) | Regenerated sludge residue soil brick and preparation method thereof | |
| CN117049829B (en) | Calcium silicate board doped with purified cotton pulp sludge and preparation method thereof | |
| KR100814740B1 (en) | Method for manufacturing the insulating material having sound-proofing effects | |
| CN112125620B (en) | Aerated concrete block with sanding powder as raw material and preparation method thereof | |
| JPH0769700A (en) | Production of refractory architectural material | |
| JP4024004B2 (en) | Gypsum composition, high-density gypsum board and method for producing them | |
| RU2570214C1 (en) | Wood-talcum peach-cement mixture | |
| CN106904917A (en) | Polystyrene calcium silicate heat-preserving mortar containing paper mill sludge and preparation method thereof | |
| CN101804653B (en) | Method for manufacturing fireproof density plates by using mulberry branches | |
| CN109694221A (en) | A kind of lightweight early strength concrete and preparation method thereof | |
| CN108395170A (en) | A kind of cement insulation board based on foam concrete waste material | |
| RU2768860C1 (en) | Method for manufacturing thermal insulation material using recycled solid household waste | |
| KR101378417B1 (en) | Water treatment sludge production method using the interlayer noise protection sheet | |
| RU2622066C2 (en) | Raw materials mixture for producing insulation boards from shredded pine needles | |
| Smirnova | Porous materials based on flax boon technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |