CN111282960A - Preparation method of composite material made of paper mill sludge and plastic - Google Patents
Preparation method of composite material made of paper mill sludge and plastic Download PDFInfo
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- CN111282960A CN111282960A CN202010121550.4A CN202010121550A CN111282960A CN 111282960 A CN111282960 A CN 111282960A CN 202010121550 A CN202010121550 A CN 202010121550A CN 111282960 A CN111282960 A CN 111282960A
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- 239000004033 plastic Substances 0.000 title claims abstract description 104
- 229920003023 plastic Polymers 0.000 title claims abstract description 104
- 239000010802 sludge Substances 0.000 title claims abstract description 69
- 239000002131 composite material Substances 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000002699 waste material Substances 0.000 claims abstract description 44
- 238000000034 method Methods 0.000 claims abstract description 30
- 239000000835 fiber Substances 0.000 claims abstract description 22
- 238000012216 screening Methods 0.000 claims abstract description 16
- 239000000203 mixture Substances 0.000 claims abstract description 15
- 238000004064 recycling Methods 0.000 claims abstract description 15
- 238000005520 cutting process Methods 0.000 claims abstract description 9
- 238000001035 drying Methods 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 3
- 239000010954 inorganic particle Substances 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 12
- 230000000844 anti-bacterial effect Effects 0.000 claims description 5
- 239000003899 bactericide agent Substances 0.000 claims description 5
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 238000007605 air drying Methods 0.000 claims description 4
- 239000000645 desinfectant Substances 0.000 claims description 4
- 239000000314 lubricant Substances 0.000 claims description 4
- 239000000049 pigment Substances 0.000 claims description 4
- 229920000098 polyolefin Polymers 0.000 claims description 4
- 239000004575 stone Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000006097 ultraviolet radiation absorber Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 abstract description 2
- 239000002904 solvent Substances 0.000 abstract description 2
- 239000004519 grease Substances 0.000 description 9
- 239000003795 chemical substances by application Substances 0.000 description 8
- 239000002689 soil Substances 0.000 description 6
- 238000007639 printing Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- 239000013502 plastic waste Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/02—Separating plastics from other materials
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/004—Sludge detoxification
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B2017/001—Pretreating the materials before recovery
- B29B2017/0015—Washing, rinsing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/02—Separating plastics from other materials
- B29B2017/0213—Specific separating techniques
- B29B2017/0217—Mechanical separating techniques; devices therefor
- B29B2017/0224—Screens, sieves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/02—Separating plastics from other materials
- B29B2017/0213—Specific separating techniques
- B29B2017/0217—Mechanical separating techniques; devices therefor
- B29B2017/0231—Centrifugating, cyclones
-
- 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
- Y02W30/62—Plastics recycling; Rubber recycling
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a preparation method of a composite material made of paper mill sludge and plastics, which comprises the following steps: treating the papermaking sludge, and recovering fibers in the papermaking sludge; the waste plastics are recycled and treated to obtain pure plastics; heating and mixing the recycled plastic and the fibers, then putting the mixture into a screw extruder or a plastic mixer for mixing, extruding the mixture by a die, and then cutting the mixture to obtain the composite material, wherein the treatment method of the papermaking sludge comprises the following steps: pretreating, drying, crushing and screening, wherein the pretreating comprises the following steps: based on the weight of the paper sludge; the method has good plastic recycling effect, is simple and convenient, not only ensures that the content of the recycled plastic is high, but also the performance of the plastic is well preserved, and the separated solvent can be recycled, thereby improving the economy of the technology, and the method can simply, conveniently and efficiently recycle the plastic, and the recovery rate can reach more than 90 percent.
Description
Technical Field
The invention relates to the technical field of recycling of paper mill sludge and plastics, in particular to a preparation method of a composite material made of paper mill sludge and plastics.
Background
In order to protect the ever-decreasing forest spontaneous combustion resources, the regeneration paper is produced by utilizing waste paper, which is an inevitable trend in the paper industry at present. But a large amount of waste is generated in the production of recycled paper and in the production of paper, which poses serious environmental problems. There are many methods for recycling paper sludge, and longer fibers are used to make fiber composites; the sludge containing more fibers can be used for producing lactic acid; the sludge can also be used as fuel to recover energy, etc. And the amount of plastic waste is drastically increased due to the mass production, consumption and short life cycle of plastic. The great waste of the plastic not only causes the huge waste of resources, but also brings great harm to the environment: polluted soil and ocean are incinerated to produce a great amount of organic substances.
However, the existing paper sludge and plastics are complex to recycle and have low recycling rate, so a preparation method of a composite material made of paper sludge and plastics is needed to solve the above problems.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a preparation method of a composite material made of paper sludge and plastics.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of a composite material made of paper mill sludge and plastics comprises the following steps:
s1, treating the paper making sludge and recovering fibers in the paper making sludge.
And S2, recycling the waste plastics and processing the waste plastics to obtain pure plastics.
S3, heating and mixing the recycled plastic and the fibers, then putting the mixture into a screw extruder or a plastic mixer for mixing, extruding the mixture from a die, and then cutting the mixture to obtain the composite material.
Further, the treatment method of the paper sludge in the step S1 comprises the following steps: pretreating, drying, crushing and screening.
Further, the pretreatment is as follows: based on the weight of the paper-making sludge, the biochemical paper-making sludge is added with a disinfectant and bactericide which contains 0.5 to 1 percent of the weight.
Further, the drying is drying the disinfected paper-making sludge.
Further, the crushing and screening adopt a conventional crushing method to crush the dried sludge and screen the sludge.
Further, the waste plastic recycling method comprises the following steps: feeding the waste plastic into a vibrating screen, introducing hot air for air drying, then feeding the waste plastic into the vibrating screen for screening, recycling the separated hard inorganic particles, and finally feeding the screened plastic into a cyclone separator to obtain the cleaned waste plastic.
Further, when the plastics and the fibers in the step S3 are heated and mixed, the polyolefin, the lubricant, the compatilizer, the ultraviolet absorber and the pigment are added into a mixer to be mixed to obtain a mixture.
Furthermore, when the waste plastics are recovered, the waste plastics are screened by a vibrating screen and then crushed by a crusher, and then the waste plastics are cleaned to a certain extent by a cleaning machine.
Further, the plastic is sent into a cyclone separator to obtain clean waste plastic, and then the adhesive and the stone powder are added and uniformly stirred for later use.
The invention has the beneficial effects that: the method has good plastic recycling effect, is simple and convenient, not only ensures that the content of the recycled plastic is high, the performance of the plastic is well preserved, but also can recycle the separated solvent, improves the economy of the technology, can simply, conveniently and efficiently recycle the plastic, has the recovery rate of over 90 percent, effectively removes high-adhesion substances such as soil, grease, printing ink and the like on the plastic, has closed cleaning process without pollutant discharge, has short process, can continuously work, has important significance for the high-quality recycling of the waste plastic, ensures that fibers in papermaking sludge are uniformly distributed in the recycled plastic through the introduction of the compatilizer, effectively improves the combination between the fibers and the plastic, thereby ensuring that the fibers can play a role in enhancing the plastic, improving the impact resistance of the composite material, Toughness and strength.
Drawings
FIG. 1 is a schematic diagram of a framework of a method for manufacturing a composite material by using paper sludge and plastics according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Example 1
Referring to fig. 1, a method for preparing a composite material from paper sludge and plastics includes the following steps:
s1: the papermaking sludge is treated, pretreated, dried, crushed and screened, the fiber in the papermaking sludge is recovered, the treatment on the papermaking sludge is more convenient and the treatment effect is better,
the pretreatment comprises the following steps: based on the weight of the paper sludge, 1 weight percent of disinfectant and bactericide, such as hypochlorous acid, is added into the biochemical paper sludge to reduce the bacterial count of the sludge from 25000 per milliliter to 1500 per milliliter, and the paper sludge can not be pretreated without biochemical treatment. The biochemically treated paper sludge contains a large amount of microorganisms, and is propagated and degraded in the transportation and accumulation processes to generate odor, so that the bactericide is selected and added into hypochlorous acid to pretreat the raw materials, and the problem of environmental pollution caused by the odor of the sludge is solved;
drying is to dry the disinfected paper sludge so that the water content is reduced from 50 weight percent to 10 weight percent, preferably 6 weight percent;
crushing and screening the dried sludge by a conventional crushing method, and screening the sludge to obtain dry powder of 50 meshes, preferably 200 meshes.
S2: the waste plastic is recycled, and the waste plastic recycling method comprises the following steps: sending into the shale shaker and letting in hot-blast air-drying simultaneously, sifting out large granule earth, grit, iron fillings to make waste plastic loose, make waste plastic's surface expose, then smash the screening to the plastics that obtain, obtain waste plastic powder, with waste plastic powder and stereoplasm inorganic particle, stripping agent with the mass ratio 1: 0.2, mixing, rotating in a horizontal rotary cylinder at the rotating speed of 25rpm for 35min, activating grease and ink by a stripping agent in the rotating process, and stripping mud, grease and ink adhered to the surface of the waste plastic powder by utilizing the micro-friction grinding effect generated by hard inorganic particles; the hard inorganic particles are high-hardness and high-wear-resistance inorganic particles with the particle size larger than 3mm, and then are introduced into a vibrating screen for screening, the separated hard inorganic particles are recycled, and screen residues are a mixture consisting of waste plastics, stripped soil, grease, printing ink and a stripping agent; and finally, conveying the screened plastic into a cyclone separator, under the action of the cyclone separator, separating the stripped soil, grease, printing ink and stripping agent at the lower end of the separator, separating and recycling the plastic from the upper end due to small specific gravity to obtain clean waste plastic, conveying the plastic into the cyclone separator to obtain the clean waste plastic, adding an adhesive and stone powder, and uniformly stirring for later use.
S3: the recycled plastic and the fibers are heated and mixed, the polyolefin, the lubricant, the compatilizer, the ultraviolet absorbent and the pigment are added into a mixer to be mixed to obtain a mixture, the fibers in the papermaking sludge can be uniformly distributed in the composite material through the introduction of the compatilizer, the combination between the fibers and the plastic is improved, so that the prepared composite material has a better effect, the composite material is placed into a screw rod device or a plastic mixer to be mixed and then extruded by a die, the composite material is obtained through cutting, and the cutting temperature of a constant-temperature constant-pressure cutting device is 108 ℃.
Example 2
Referring to fig. 1, a method for preparing a composite material from paper sludge and plastics includes the following steps:
s1: the papermaking sludge is treated, pretreated, dried, crushed and screened, the fiber in the papermaking sludge is recovered, the treatment on the papermaking sludge is more convenient and the treatment effect is better,
the pretreatment comprises the following steps: based on the weight of the paper sludge, the biochemical paper sludge is added with a disinfectant containing 0.5 percent of the weight, such as hypochlorous acid, so that the bacteria number of the sludge is reduced from 20000/ml to 1000/ml, and the paper sludge can be not pretreated without biochemical treatment. The biochemically treated paper sludge contains a large amount of microorganisms, and is propagated and degraded in the transportation and accumulation processes to generate odor, so that the bactericide is selected and added into hypochlorous acid to pretreat the raw materials, and the problem of environmental pollution caused by the odor of the sludge is solved;
drying is to dry the disinfected paper sludge so that the water content is reduced from 50 weight percent to 8 weight percent, preferably 10 weight percent;
crushing and screening the dried sludge by a conventional crushing method, and screening the sludge to obtain dry powder of 80 meshes, preferably 100 meshes.
S2: the waste plastic is recycled, and the waste plastic recycling method comprises the following steps: sending into the shale shaker and letting in hot-blast air-drying simultaneously, sifting out large granule earth, grit, iron fillings to make waste plastic loose, make waste plastic's surface expose, then smash the screening to the plastics that obtain, the preliminary treatment is for smashing through the rubbing crusher earlier when the waste plastic retrieves, obtains waste plastic powder, with waste plastic powder and stereoplasm inorganic particle, stripping agent with mass ratio 1: 0.1, mixing, rotating in a horizontal rotary cylinder at the rotating speed of 30rpm for 30min, activating grease and ink by a stripping agent in the rotating process, and stripping mud, grease and ink adhered to the surface of the waste plastic powder by utilizing the micro-friction grinding effect generated by hard inorganic particles; the hard inorganic particles are high-hardness and high-wear-resistance inorganic particles with the particle size larger than 3mm, and then are introduced into a vibrating screen for screening, the separated hard inorganic particles are recycled, and screen residues are a mixture consisting of waste plastics, stripped soil, grease, printing ink and a stripping agent; and finally, conveying the screened plastic into a cyclone separator, under the action of the cyclone separator, separating the stripped soil, grease, printing ink and stripping agent at the lower end of the separator, separating and recovering the plastic from the upper end when the specific gravity of the plastic is small, conveying the plastic into the cyclone separator to obtain clean waste plastic, adding adhesive and stone powder, and uniformly stirring the waste plastic in a mixer for later use.
S3: the recycled plastic and the fibers are heated and mixed, the polyolefin, the lubricant, the compatilizer, the ultraviolet absorbent and the pigment are added into a mixer to be mixed to obtain a mixture, the fibers in the papermaking sludge can be uniformly distributed in the composite material through the introduction of the compatilizer, the combination between the fibers and the plastic is improved, so that the prepared composite material has a better effect, the composite material is placed into a screw rod device or a plastic mixer to be mixed and then extruded by a die, the composite material is obtained through cutting, and the cutting temperature of a constant-temperature constant-pressure cutting device is 120 ℃.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. The preparation method of the composite material manufactured by the paper mill sludge and the plastic is characterized by comprising the following steps:
s1, treating the paper making sludge and recovering fibers in the paper making sludge.
And S2, recycling the waste plastics and processing the waste plastics to obtain pure plastics.
S3, heating and mixing the recycled plastic and the fibers, then putting the mixture into a screw extruder or a plastic mixer for mixing, extruding the mixture from a die, and then cutting the mixture to obtain the composite material.
2. The method for preparing the composite material of paper sludge and plastics according to claim 1, wherein the step of the method for treating the paper sludge in S1 is as follows: pretreating, drying, crushing and screening.
3. The method for preparing the composite material made of the paper mill sludge and the plastics according to the claim 2, characterized in that the pretreatment is: based on the weight of the paper-making sludge, the biochemical paper-making sludge is added with a disinfectant and bactericide which contains 0.5 to 1 percent of the weight.
4. The method of claim 2, wherein the drying is drying the sterilized paper sludge.
5. The method as claimed in claim 2, wherein the crushing and screening is performed by crushing the dried sludge by a conventional crushing method and screening the crushed sludge.
6. The method for preparing the composite material made of the paper mill sludge and the plastic according to the claim 1, wherein the method for recycling the waste plastic comprises the following steps: then feeding the waste plastics into a vibrating screen, introducing hot air for air drying, then feeding the waste plastics into the vibrating screen for screening, recycling the separated hard inorganic particles, and finally feeding the screened plastics into a cyclone separator to obtain the cleaned waste plastics.
7. The method for preparing a composite material made of paper mill sludge and plastics according to claim 1, wherein when the plastics and the fibers are heated and mixed in S3, the polyolefin, the lubricant, the compatilizer, the ultraviolet absorber and the pigment are added into a mixer and mixed to obtain a mixture.
8. The method for preparing the composite material made of the paper mill sludge and the plastic as claimed in claim 6, wherein the waste plastic is recycled, screened by a vibrating screen, crushed by a crusher, and then cleaned to a certain extent by a cleaning machine.
9. The method for preparing the composite material by using the paper mill sludge and the plastic as claimed in claim 6, wherein the plastic is sent into a cyclone separator to obtain clean waste plastic, and the adhesive and the stone powder are added and uniformly stirred for later use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010121550.4A CN111282960A (en) | 2020-02-26 | 2020-02-26 | Preparation method of composite material made of paper mill sludge and plastic |
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| CN202010121550.4A CN111282960A (en) | 2020-02-26 | 2020-02-26 | Preparation method of composite material made of paper mill sludge and plastic |
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| 刘建伟，程磊，李汉军，田洪钰: "《生活垃圾综合处理与资源化利用技术》", 31 January 2008, 中国环境出版集团 * |
| 蒋晓曙，李庆录: "《土木工程材料》", 31 January 2018, 知识产权出版社 * |
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