CN111234350B - Composite board prepared from red mud, waste plastic and rice paper waste residues and preparation method thereof - Google Patents
Composite board prepared from red mud, waste plastic and rice paper waste residues and preparation method thereof Download PDFInfo
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- CN111234350B CN111234350B CN202010138405.7A CN202010138405A CN111234350B CN 111234350 B CN111234350 B CN 111234350B CN 202010138405 A CN202010138405 A CN 202010138405A CN 111234350 B CN111234350 B CN 111234350B
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- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
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Abstract
The invention discloses a composite board prepared from red mud, waste plastic and rice paper waste residues and a preparation method thereof, wherein the composite board comprises the following raw material components: the red mud, the waste plastics and the rice paper waste residues are prepared from the following raw materials in a mass ratio of (3-5): (5-7): (1-7). The composite board utilizes solid waste-red mud and waste rice paper residues generated in the rice paper production process, so that the mechanical property of the composite board is improved, and the cost is reduced; accords with the concept of green development and changes waste into valuable. And the solid waste added according to the required proportion is more, the mechanical property is excellent, and the method can be used as a way for effectively utilizing the red mud and the rice paper waste residue solid waste.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a composite board prepared from red mud, waste plastics and rice paper waste residues and a preparation method thereof.
Background
Red mud is a solid waste residue discharged when aluminum oxide is extracted in the aluminum industry, and is called red mud because it contains a large amount of iron oxide, which is often red. According to the production method, the red mud can be divided into 3 types of Bayer process red mud, sintering process red mud and combination process red mud, and 1.0-1.8 t of red mud is generated when 1t of alumina is produced. As the first alumina producing country in China, the red mud discharged each year is up to hundreds of millions of tons. By the end of 2018, the red mud accumulated and stockpiled in China already exceeds 13 hundred million tons, and the land occupation exceeds 12 ten thousand acres. With the outstanding environmental resource problem, scholars at home and abroad develop a great deal of research on the resource utilization of the red mud. The mineral composite board prepared by filling the red mud with the thermoplastic polymer is widely used in the building and decoration industries, and not only consumes the red mud, but also reduces the cost.
The red mud is used as a filler to be filled in the high molecular polymer, so that the performance of the high molecular polymer can be effectively improved while the red mud is consumed. The Luyan and the like are added into a PP matrix by surface modification of red mud, so that the severe dripping condition of a polypropylene material is well improved, and the flame retardant property is obviously improved. The polyvinyl chloride/red mud composite board is prepared by Yuping, and the wet-modified red mud can effectively improve the mechanical property and heat resistance of PVC. Liu and the like utilize the modified red mud to reinforce the phenolic foamed plastic, so that the mechanical property and the thermal property of the phenolic foamed plastic are improved. In addition, fiber materials such as continuous fibers and carbon fibers are used as reinforcements to be added into the red mud composite board, so that the mechanical property of the red mud composite board can be effectively improved.
At present, red mud is used as a material prepared by compounding a filler and a polymer, the red mud needs to be modified, and the mechanical property of the material obtained by compounding the unmodified red mud and the polymer is obviously lower than that of a composite material obtained by modifying the red mud. However, the red mud modification requires the addition of a modifier and increases the preparation procedures, thereby increasing the cost.
In the prior art, the mechanical property of the red mud composite material is improved by using a fiber reinforced technology, and although the mechanical property of the material can be effectively improved, the method still has many defects, such as complex raw materials and process, high hot pressing temperature, and obviously higher cost than solid waste raw materials.
The Xuan paper, one of four inventions in ancient times in China, has been produced in Anhui Jing county for over 1000 years, is a national geographical marking product, and has good ink moistening property, ageing resistance and corrosion resistance, so that the Xuan paper is reputed as 'King in paper'. Main raw materials of the rice paper are wingceltis bark fiber and cornfield straw fiber which are matched in length, and mutual interweaving of the fibers is facilitated. During the pulping process of rice paper, a large amount of solid waste is generated along with the production of residual sandy straw as a main component. Most of the waste treatment methods adopt a stacking mode, occupy land, influence the surrounding environment and become a large factor for limiting the yield of the rice paper, but no research on the application of the rice paper waste residue exists at present.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide a composite board prepared from red mud, waste plastic and rice paper waste residues, wherein the composite board utilizes solid waste-red mud and rice paper waste residues generated in the rice paper production process, so that the mechanical property of the composite board is improved, and the cost is reduced; accords with the concept of green development and changes waste into valuable. And the solid waste added according to the required proportion is more, the mechanical property is excellent, and the method can be used as a way for effectively utilizing the red mud and the rice paper waste residue solid waste.
In order to realize the purpose, the invention provides a composite board prepared from red mud, waste plastic and rice paper waste residues, which comprises the following raw material components: the red mud, the waste plastics and the rice paper waste residues are prepared from the following raw materials in a mass ratio of (3-5): (5-7): (1-7).
In an embodiment of the present invention, the mass ratio of the red mud, the waste plastic and the rice paper waste residue is 4: 6: 6.
in the raw material components for preparing the composite board of the invention, fine holes or cracks are easy to be generated inside the waste plastic in the process of die pressing, which may cause the mechanical property of the board to be poor. When the red mud is added into the waste plastics, the red mud serving as rigid particles can be filled into the hole cracks of the substrate, so that the interior of the material is more compact, and the rigidity of the plate is improved. When the waste rice paper residues are added into waste plastics, mineral particles in the waste rice paper residues play a role in reinforcing rigid particles, fibers in the waste rice paper residues are combined with a matrix, and the fibers are broken to eliminate partial stress under the condition of external stress, so that the mechanical property of the material is improved. When the red mud and the rice paper waste residue are added into the waste plastics, the method is a mutual supplement mode, and has the advantages of rigid particle reinforcement and fiber toughening. However, when the content is too large, the filler is agglomerated, so that the internal stress of the material is concentrated, and the mechanical property of the material is reduced.
In one embodiment of the invention, the particle diameter of the red mud and the rice paper waste residue does not exceed 60 meshes.
In an embodiment of the invention, the rice paper waste residue is solid waste generated in a rice paper pulping process, the red mud is industrial solid waste residue discharged after alumina is extracted from bauxite, and the waste plastic is at least one selected from polyethylene, polyvinyl chloride and polypropylene.
The invention also provides a preparation method of the composite board, which comprises the following steps: preparing raw materials: preparing rice paper waste residues, red mud and waste plastics; preliminary mixing: manually mixing the rice paper waste residue, the red mud and the waste plastics; open mixing and blending: heating an open mill in advance, and then introducing the preliminarily mixed raw materials into the open mill for blending; and compression molding: adding the raw materials subjected to the open mixing step into a specific mould, further putting the specific mould into a pre-heated plate vulcanizing machine for preheating, primarily pressurizing, then removing the pressure, putting the extruded raw materials into the specific mould again, pressurizing again by the plate vulcanizing machine, preserving heat and pressure, removing the pressure, cooling and demoulding, and thus obtaining the composite board.
The preliminary mixing comprises the following specific operation steps: and firstly, preliminarily stirring the rice paper waste residue, the red mud and the waste plastic by hands in a sealed bag to uniformly mix the raw materials together.
The open mixing comprises the following specific operation steps: starting the open mill, heating to a specified temperature, adjusting the distance between the front roller and the rear roller, starting the main machine to rotate, and pouring the raw materials between the two rollers of the open mill; after the plastic is heated and stuck on the roller and rotates along with the roller, adding the dropped red mud and rice paper waste residue again, and blending together; during the process, the left and right raw materials can be mixed by a shovel and the like to be uniformly mixed; after a period of open milling, the material was shoveled off the rolls and the mill was closed.
The specific operation steps of compression molding are as follows: a steel die, two steel plates with equal size and two polyester films are taken, and a mold release agent is sprayed on the die. The raw materials and the die are put in the sequence of steel plate-polyester film-die-raw material-polyester film-steel plate from bottom to top, put on a flat vulcanizing machine which is started in advance and heated to a set temperature, preheated for a period of time, then pressurized, the pressure is removed after the raw materials are preliminarily extruded, the raw materials extruded at the periphery are shoveled down, put in the middle of the die again and molded again. After the pressure is gradually increased to a certain pressure, the temperature and pressure are kept, and the mould is fully molded and filled. And (5) removing the pressure, and taking out the die for demolding.
The concrete operations in the preparation method are carried out under mild conditions, the reinforcing effect can be achieved only by fully dispersing the filler into the waste plastics, and severe conditions are not required.
In one embodiment of the invention, in the open mixing step, the temperature reached by heating the open mill in advance is 150-.
In one embodiment of the present invention, in the open mixing step, the raw materials after the initial mixing are introduced into an open mill and mixed, wherein the distance between two adjacent rolls is 0.8-1.2 mm.
In one embodiment of the present invention, in the press molding step, the specific mold structure to which the raw material is added includes, in order from bottom to top, a steel plate, a polyester film, a mold, the raw material, the polyester film, and the steel plate.
In an embodiment of the invention, in the compression molding step, the temperature reached by the press vulcanizer is 150-.
In one embodiment of the present invention, in the compression molding step, the operation of re-pressurizing is performed slowly, and cannot be performed too fast, which may result in wrinkling of the polyester film and bubbles in the sample, and the specific operation is as follows: the primary pressurization is not more than 5MPa, the pressurization is continued after the pressure intensity is stabilized, the finally achieved stable pressure intensity is 10MPa, and the time of heat preservation and pressure maintaining is 5-10 min.
Compared with the prior art, the invention has the following beneficial effects:
according to the composite board, the red mud content of each raw material is increased, so that the rigidity of a sample is enhanced, the waste residue content of rice paper is increased, and the toughness and rigidity of the sample are enhanced to a certain extent; compared with the red mud and plastic composite material, the mechanical property is greatly improved, and the toughness and the flexural modulus are improved; and the used raw materials are solid wastes, so that a new method is provided for waste utilization and environmental protection.
Drawings
FIG. 1 is a photograph of a sample of a composite sheet made in accordance with one embodiment of the present invention;
FIG. 2 is a process flow diagram of composite board sample preparation according to one embodiment of the present invention.
Detailed Description
The following detailed description of specific embodiments of the invention is provided, but it should be understood that the scope of the invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
The experimental procedures used in the following examples are all conventional procedures unless otherwise specified.
The present invention is specifically described in the following examples 1 to 4 with respect to the raw material composition and the preparation method of the composite sheet.
Example 1:
the first step is as follows: taking the following raw materials in percentage by mass:
red mud of Shandong Wei bridge: waste PE: anhui rice paper waste residue powder is 4: 6: 2, grinding the red mud and the rice paper waste residues by using a vibration mill before use, sieving the ground red mud and the rice paper waste residues by using a 60-mesh sieve, and drying the ground red mud and the rice paper waste residues for use.
The second step is that: in the experiment, the red mud, the waste PE and the rice paper waste residue are mixed according to the proportion of the experimental scheme to be used as raw materials, and the raw materials are firstly preliminarily stirred by hands in a No. 6 sealing bag to be uniformly mixed together. The open mill is started and heated to a specified temperature, the distance between the front roller and the rear roller is adjusted to be about 1mm, the main machine is started to rotate, and then the raw materials are poured between the two rollers of the open mill. After the plastic is heated and stuck on the roller and rotates along with the roller, the dropped red mud and the rice paper waste residue are added again and blended together. During the process, the left and right raw materials can be mixed with each other by using a shovel and the like, so that the raw materials are uniformly mixed. After open milling for 10-15 minutes, the raw materials are shoveled off the rollers, and the open mill is closed.
The third step: a steel die, two steel plates with equal size and two polyester films are taken, and a mold release agent is sprayed on the die. The raw materials and the die are put in the order of steel plate-polyester film-die-raw material-polyester film-steel plate from bottom to top, and are put on a flat vulcanizing machine which is started in advance and heated to a set temperature, and are preheated for 5-10 minutes. Pressurizing after preheating, primarily extruding the raw materials, removing the pressure, shoveling the extruded raw materials at the periphery, putting the raw materials into the middle of the die again, and molding again. After the pressure is gradually increased to 10Mpa, the temperature and pressure are kept for 5-10 minutes, and the die is fully molded and filled. And (5) removing the pressure, and taking out the die for demolding.
When demoulding, the steel plate is taken off, the polyester film is taken off after the mould is cooled slightly, and the redundant raw materials are shoveled off by a shovel. And (4) after the sample is cooled and molded, detaching the sample from the mold, cutting burrs by using a small knife, putting the sample into a No. 7 plastic package bag, and writing the number and the date.
The fourth step: after the sample had cooled completely, the tensile strength and flexural strength were tested. The tensile strength was found to be 17.29MPa and the flexural strength was found to be 49.10 MPa. The water absorption of the sample after being soaked for 7 days is 0.8 percent through a water absorption test.
Example 2:
the first step is as follows: taking the following raw materials in percentage by mass:
red mud of Shandong Wei bridge: waste PE: anhui rice paper waste residue powder is 4: 6: 3, grinding the red mud and the rice paper waste residues by using a vibration mill before use, sieving the ground red mud and the rice paper waste residues by using a 60-mesh sieve, and drying the ground red mud and the rice paper waste residues for use.
The second step is that: in the experiment, the red mud, the waste plastic and the rice paper waste residue are mixed according to the proportion of the experimental scheme to be used as raw materials, and the raw materials are firstly preliminarily stirred by hands in a No. 6 sealing bag to be uniformly mixed together. The open mill is started and heated to a specified temperature, the distance between the front roller and the rear roller is adjusted to be about 1mm, the main machine is started to rotate, and then the raw materials are poured between the two rollers of the open mill. After the plastic is heated and stuck on the roller and rotates along with the roller, the dropped red mud and the rice paper waste residue are added again and blended together. During the process, the left and right raw materials can be mixed with each other by using a shovel and the like, so that the raw materials are uniformly mixed. After open milling for 10-15 minutes, the raw materials are shoveled off the rollers, and the open mill is closed.
The third step: a steel die, two steel plates with equal size and two polyester films are taken, and a mold release agent is sprayed on the die. The raw materials and the die are put in the order of steel plate-polyester film-die-raw material-polyester film-steel plate from bottom to top, and are put on a flat vulcanizing machine which is started in advance and heated to a set temperature, and are preheated for 5-10 minutes. Pressurizing after preheating, primarily extruding the raw materials, removing the pressure, shoveling the extruded raw materials at the periphery, putting the raw materials into the middle of the die again, and molding again. After the pressure is gradually increased to 10Mpa, the temperature and pressure are kept for 5-10 minutes, and the die is fully molded and filled. And (5) removing the pressure, and taking out the die for demolding.
When demoulding, the steel plate is taken off, the polyester film is taken off after the mould is cooled slightly, and the redundant raw materials are shoveled off by a shovel. And (4) after the sample is cooled and molded, detaching the sample from the mold, cutting burrs by using a small knife, putting the sample into a No. 7 plastic package bag, and writing the number and the date.
The fourth step: after the sample had cooled completely, the tensile strength and flexural strength were tested. The tensile strength was measured to be 19.25MPa and the bending strength was measured to be 49.27 MPa. The water absorption of the sample after being soaked for 7 days is 1.1 percent through a water absorption test.
Example 3:
the first step is as follows: taking the following raw materials in percentage by mass:
red mud of Shandong Wei bridge: waste PE: the Anhui rice paper waste residue powder is 4: 6: 4, grinding the red mud and the rice paper waste residues by using a vibration mill before use, sieving the ground red mud and the rice paper waste residues by using a 60-mesh sieve, and drying the ground red mud and the rice paper waste residues for use.
The second step is that: in the experiment, the red mud, the waste plastic and the rice paper waste residue are mixed according to the proportion of the experimental scheme to be used as raw materials, and the raw materials are firstly preliminarily stirred by hands in a No. 6 sealing bag to be uniformly mixed together. The open mill is started and heated to a specified temperature, the distance between the front roller and the rear roller is adjusted to be about 1mm, the main machine is started to rotate, and then the raw materials are poured between the two rollers of the open mill. After the plastic is heated and stuck on the roller and rotates along with the roller, the dropped red mud and the rice paper waste residue are added again and blended together. During the process, the left and right raw materials can be mixed with each other by using a shovel and the like, so that the raw materials are uniformly mixed. After open milling for 10-15 minutes, the raw materials are shoveled off the rollers, and the open mill is closed.
The third step: a steel die, two steel plates with equal size and two polyester films are taken, and a mold release agent is sprayed on the die. The raw materials and the die are put in the order of steel plate-polyester film-die-raw material-polyester film-steel plate from bottom to top, and are put on a flat vulcanizing machine which is started in advance and heated to a set temperature, and are preheated for 5-10 minutes. Pressurizing after preheating, primarily extruding the raw materials, removing the pressure, shoveling the extruded raw materials at the periphery, putting the raw materials into the middle of the die again, and molding again. After the pressure is gradually increased to 10Mpa, the temperature and pressure are kept for 5-10 minutes, and the die is fully molded and filled. And (5) removing the pressure, and taking out the die for demolding.
When demoulding, the steel plate is taken off, the polyester film is taken off after the mould is cooled slightly, and the redundant raw materials are shoveled off by a shovel. And (4) after the sample is cooled and molded, detaching the sample from the mold, cutting burrs by using a small knife, putting the sample into a No. 7 plastic package bag, and writing the number and the date.
The fourth step: after the sample had cooled completely, the tensile strength and flexural strength were tested. The tensile strength was measured to be 15.59MPa and the bending strength was measured to be 49.35 MPa. The water absorption of the sample after being soaked for 7 days is 1.3 percent through a water absorption test.
Example 4:
the first step is as follows: taking the following raw materials in percentage by mass:
red mud of Shandong Wei bridge: waste PE: anhui rice paper waste residue powder is 4: 6: and 6, grinding the red mud and the rice paper waste residues by using a vibration mill before use, sieving the ground red mud and the rice paper waste residues by using a 60-mesh sieve, and drying the ground red mud and the rice paper waste residues for use.
The second step is that: in the experiment, the red mud, the waste plastic and the rice paper waste residue are mixed according to the proportion of the experimental scheme to be used as raw materials, and the raw materials are firstly preliminarily stirred by hands in a No. 6 sealing bag to be uniformly mixed together. The open mill is started and heated to a specified temperature, the distance between the front roller and the rear roller is adjusted to be about 1mm, the main machine is started to rotate, and then the raw materials are poured between the two rollers of the open mill. After the plastic is heated and stuck on the roller and rotates along with the roller, the dropped red mud and the rice paper waste residue are added again and blended together. During the process, the left and right raw materials can be mixed with each other by using a shovel and the like, so that the raw materials are uniformly mixed. After open milling for 10-15 minutes, the raw materials are shoveled off the rollers, and the open mill is closed.
The third step: a steel die, two steel plates with equal size and two polyester films are taken, and a mold release agent is sprayed on the die. The raw materials and the die are put in the order of steel plate-polyester film-die-raw material-polyester film-steel plate from bottom to top, and are put on a flat vulcanizing machine which is started in advance and heated to a set temperature, and are preheated for 5-10 minutes. Pressurizing after preheating, primarily extruding the raw materials, removing the pressure, shoveling the extruded raw materials at the periphery, putting the raw materials into the middle of the die again, and molding again. After the pressure is gradually increased to 10Mpa, the temperature and pressure are kept for 5-10 minutes, and the die is fully molded and filled. And (5) removing the pressure, and taking out the die for demolding.
When demoulding, the steel plate is taken off, the polyester film is taken off after the mould is cooled slightly, and the redundant raw materials are shoveled off by a shovel. And (4) after the sample is cooled and molded, detaching the sample from the mold, cutting burrs by using a small knife, putting the sample into a No. 7 plastic package bag, and writing the number and the date.
The fourth step: after the sample had cooled completely, the tensile strength and flexural strength were tested. The tensile strength was found to be 15.89MPa and the flexural strength was found to be 71.81 MPa. The water absorption of the sample after being soaked for 7 days is 1.7 percent through a water absorption test.
The invention further specifically describes the selection of raw materials and proportions in the composite board through the following comparative examples.
Comparative example 1
The mechanical properties of the composite board prepared from the components with different proportions are as follows:
TABLE 1 comparison table of mechanical properties
As can be seen from Table 1, the mechanical properties of the plate can be improved by adding the red mud or the rice paper waste residue into the waste PE. In a red mud/waste PE system, the tensile strength and the bending strength are increased and then reduced along with the increase of the content of the red mud, when the content of the red mud is 40 percent and the content of the waste PE is 60 percent, the overall mechanical property of the plate is the best, and the tensile strength and the bending strength are the maximum. In the rice paper waste residue/waste PE system, with the increase of the content of the rice paper waste residue, the tensile strength is increased firstly and then reduced, and the bending strength is increased continuously. In a red mud/waste PE/rice paper waste residue system, when the content of rice paper waste residue is 60%, the bending strength reaches the maximum, although the tensile strength is reduced, the plastic consumption with higher value is further reduced, the tensile strength basically meets the requirement, and the rice paper waste residue system can be better applied.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (7)
1. A composite board prepared from red mud, waste plastics and rice paper waste residues is characterized by comprising the following raw material components: the red mud, the waste plastics and the rice paper waste residues are mixed according to the mass ratio of 4: 6: 6;
the rice paper waste residue is solid waste generated in the rice paper pulping process, the red mud is industrial solid waste discharged after alumina is extracted from bauxite, and the waste plastic is at least one selected from polyethylene, polyvinyl chloride and polypropylene.
2. The method of making a composite sheet material of claim 1, comprising the steps of:
preparing raw materials: preparing rice paper waste residues, red mud and waste plastics;
preliminary mixing: manually mixing the rice paper waste residue, the red mud and the waste plastics;
open mixing and blending: heating an open mill in advance, and then introducing the preliminarily mixed raw materials into the open mill for blending;
compression molding: adding the raw materials subjected to the open mixing step into a specific mould, further putting the specific mould into a pre-heated plate vulcanizing machine for preheating, primarily pressurizing, then removing the pressure, putting the extruded raw materials into the specific mould again, pressurizing again by the plate vulcanizing machine, preserving heat and pressure, removing the pressure, cooling and demoulding, thus obtaining the composite board of claim 1.
3. The method for preparing a composite board as claimed in claim 2, wherein in the open mixing step, the open mill is heated in advance to reach a temperature of 150 ℃ and 155 ℃, and the mixing time is 10-15 min.
4. The method of manufacturing a composite board according to claim 2, wherein in the open mixing step, the preliminarily mixed raw materials are introduced into an open mill and mixed between two rolls, and the distance between the two rolls is 0.8 to 1.2 mm.
5. The method of manufacturing a composite board according to claim 2, wherein the specific mold structure to which the raw material is added in the press molding step includes, in order from bottom to top, a steel plate, a polyester film, a mold, the raw material, the polyester film, and the steel plate.
6. The method for preparing a composite board according to claim 2, wherein in the compression molding step, the press vulcanizer is heated in advance to reach a temperature of 150 ℃ and 160 ℃, and the preheating time is 5-10 minutes.
7. The method for preparing a composite board according to claim 2, wherein in the compression molding step, the specific operation of re-pressurizing is as follows: the primary pressurization is not more than 5MPa, the pressurization is continued after the pressure intensity is stabilized, the finally achieved stable pressure intensity is 10MPa, and the time of heat preservation and pressure maintaining is 5-10 min.
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| WO2018152583A1 (en) * | 2017-02-22 | 2018-08-30 | Pure New World Pty Ltd | Composite material |
| CN109384988A (en) * | 2018-09-14 | 2019-02-26 | 江苏千龙新型材料有限公司 | A kind of preparation process of the high tenacity PE hollow spiral tube modified based on red mud |
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| CN101302312B (en) * | 2008-07-03 | 2011-06-08 | 昆明理工大学 | Preparation of waste paper-reinforced regenerative high-density polyethylene composite material |
| CN104291539B (en) * | 2013-07-16 | 2016-09-28 | 中国地质大学（北京） | One utilizes CO2method with spent acid Combined Treatment Bayer process red mud dealkalize |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018152583A1 (en) * | 2017-02-22 | 2018-08-30 | Pure New World Pty Ltd | Composite material |
| CN109384988A (en) * | 2018-09-14 | 2019-02-26 | 江苏千龙新型材料有限公司 | A kind of preparation process of the high tenacity PE hollow spiral tube modified based on red mud |
Non-Patent Citations (1)
| Title |
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| 赤泥填充改性聚丙烯的研究;王荣华;《现代塑料加工应用》;20161231;全文 * |
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