CN111087721A - Pipeline for preventing scab in dissolution process of aluminum oxide production and preparation method - Google Patents
Pipeline for preventing scab in dissolution process of aluminum oxide production and preparation method Download PDFInfo
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- CN111087721A CN111087721A CN202010041047.8A CN202010041047A CN111087721A CN 111087721 A CN111087721 A CN 111087721A CN 202010041047 A CN202010041047 A CN 202010041047A CN 111087721 A CN111087721 A CN 111087721A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/02—Organic and inorganic ingredients
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
- B29D23/001—Pipes; Pipe joints
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/04—Ingredients characterised by their shape and organic or inorganic ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
- C08K3/041—Carbon nanotubes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
- C08K3/042—Graphene or derivatives, e.g. graphene oxides
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/17—Amines; Quaternary ammonium compounds
- C08K5/18—Amines; Quaternary ammonium compounds with aromatically bound amino groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/39—Thiocarbamic acids; Derivatives thereof, e.g. dithiocarbamates
- C08K5/40—Thiurams, i.e. compounds containing groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/45—Heterocyclic compounds having sulfur in the ring
- C08K5/46—Heterocyclic compounds having sulfur in the ring with oxygen or nitrogen in the ring
- C08K5/47—Thiazoles
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/06—Elements
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/08—Materials not undergoing a change of physical state when used
- C09K5/14—Solid materials, e.g. powdery or granular
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
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Abstract
The invention discloses an anti-scarring pipeline in the dissolution process of alumina production and a preparation method thereof. The pipeline of the invention can meet the requirement of good anti-scarring performance in the dissolution process of alumina production, and is suitable for popularization and application. Meanwhile, different heat transfer efficiencies can be obtained by controlling the addition amount of the heat conduction material, and the aluminum oxide heat transfer material has various performances such as wear resistance, corrosion resistance, high temperature resistance, impact resistance and the like, and can adapt to the working condition environment in the production process of aluminum oxide. The process is simple and is suitable for popularization and application.
Description
Technical Field
The invention belongs to the technical field of pipelines and the field of scar prevention in alumina production, and particularly relates to an anti-scar pipeline in the dissolution process of alumina production and a preparation method thereof.
Background
The problem of scarring during alumina production is ubiquitous but has not been effectively addressed for a long time. After the scab is generated in the pipeline, the heat exchange efficiency of the pipeline is reduced, the flowing resistance of the solution in the pipeline is increased, and the power consumption and various consumptions are increased. Meanwhile, the scar cleaning cost is huge, the service life of the cleaned equipment is shortened, and the production and maintenance cost is increased.
The pipeline used in the dissolution process in the prior art is basically made of a single steel pipe, and although the cost is low, the scab problem can not be solved all the time.
Disclosure of Invention
The invention aims to provide a pipeline for preventing scabbing in the dissolution process of alumina production, and a preparation method thereof is another aim of the invention.
In order to realize the purpose, the invention adopts the following technical scheme:
a pipeline for preventing scabbing in the dissolution process of aluminum oxide production comprises a steel pipeline body, wherein a hydrophobic layer is arranged on the inner surface of the steel pipeline body.
The hydrophobic layer is a fluorine rubber lining layer. The thickness of the fluororubber lining layer is 1-3 mm.
The heat conduction materials are dispersed in the fluororubber lining layer, and the content of the heat conduction materials is 0-20 wt%.
The heat conduction material is one or a mixture of more than two of graphene, graphite, carbon fiber, carbon nano tube and carbon black.
The hydrophobic layer is prepared from the following raw materials in percentage by weight: 60-85% of fluororubber, 0-20% of heat conducting material, 10-15% of vulcanizing agent and 1-10% of additive.
The fluororubber is perfluororubber; the vulcanizing agent is a peroxide vulcanizing agent; the additive consists of 0.5 to 5 weight portions of anti-aging agent and 0.5 to 5 weight portions of accelerator.
The anti-aging agent is one or a mixture of two of anti-aging agent MP and anti-aging agent DNP, and the accelerator is one or a mixture of more than two of accelerator DPTT, accelerator CZ and accelerator NS.
The preparation method of the anti-scarring pipeline in the dissolution process of the alumina production comprises the following steps:
1) adding water into a heat conduction material, a vulcanizing agent and an additive to disperse to obtain a dispersion liquid, and drying to obtain a powdery material;
2) plasticating the fluororubber, and adding the powder product obtained in the step (1) to the plasticated fluororubber for mixing to obtain mixed rubber;
3) polishing and grinding the inner wall of the steel pipeline body to be smooth, and smearing a rubber adhesive; and (3) calendering and molding the rubber compound obtained in the step 2) on the inner wall of the steel pipeline body, and vulcanizing to obtain the rubber compound.
In the step 1), the water is deionized; dispersing by adopting a heating and/or ultrasonic treatment mode, wherein the content of the heat conducting material in the dispersion liquid is 0-150 g/L, the drying temperature is 100-120 ℃, and the drying time is 10-24 h; in the step 2), the plasticating temperature is 100-130 ℃, and the plasticating time is 3-10 min; the mixing temperature is 100-130 ℃, and the mixing time is 10-20 min; in the step 3), the vulcanization temperature is 140-150 ℃.
In the step 1), when heating and dispersing are adopted, the temperature is 50-70 ℃, and the time is 0.2-1 h; when ultrasonic dispersion is adopted, the ultrasonic frequency is 20 kHz-50 kHz, and the ultrasonic time is 0.2 h-1 h.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the hydrophobic layer is arranged on the inner wall of the steel pipeline, specifically, the hydrophobic layer is arranged to be modified perfluoro rubber, so that the hydrophobic property is higher. Therefore, in the actual production process of the aluminum oxide, the dissolution stage can effectively prevent scab substances from being enriched on the inner wall of the pipeline, solid particles can not be stably adhered to the surface of the pipeline, and the solid particles can flow away along with the solution after being washed by the solution. Researches show that the pipeline has good anti-scarring performance, is not easy to damage after long-term use, and is suitable for general popularization and application;
2. meanwhile, the pipeline has good heat conducting performance due to the addition of heat conducting materials such as graphene and/or carbon black, and the pipeline for preventing scabbing in the aluminum oxide production dissolution process with different heat transfer efficiencies can be obtained by controlling the addition amount of the heat conducting materials such as graphene and/or carbon black within a certain range, so that different requirements of the aluminum oxide production dissolution process on pipeline heat transfer are met. In the area of the pipeline needing heat preservation, the addition amount of the heat conduction material is reduced to 0-5%, and the heat conduction coefficient of the pipeline can be controlled to be 0.05-0.5W/(m.K); in the area where the pipeline needs low heat exchange, the adding amount of the heat conduction material is adjusted to 5-10%, and the heat conduction coefficient of the pipeline can be controlled to be 0.5-20W/(m.K); in the area where the pipeline needs high heat exchange, the addition amount of the heat conduction material is adjusted to 10-20%, and the heat conduction coefficient of the pipeline can be controlled to be 20-45W/(m.K); thereby meeting the requirements of different areas on different temperature control and heat exchange.
3. In the invention, the hydrophobic layer is also added with additives such as an anti-aging agent, an accelerating agent and the like, so that the prepared finished pipeline has a plurality of performances such as good wear resistance, corrosion resistance, high temperature resistance, impact resistance and the like, can adapt to the working condition environment of the alumina production process, effectively prolongs the service life of the pipeline, and further reduces the economic cost of a using unit.
Detailed Description
The invention is further illustrated by the following specific examples.
Example 1
A pipeline for preventing scabbing in the dissolution process of aluminum oxide production comprises a steel pipeline body, wherein a hydrophobic layer is arranged on the inner surface of the steel pipeline body, the hydrophobic layer is a perfluorinated rubber inner liner layer, and the thickness of the perfluorinated rubber inner liner layer is 2 mm; the perfluororubber lining layer is prepared from the following raw materials in percentage by weight: 70% of perfluororubber, 12% of graphene, 7% of carbon black, 1% of additive and 10% of vulcanizing agent; the vulcanizing agent is a peroxide vulcanizing agent, and the additive consists of 1 part by weight of anti-aging agent and 1 part by weight of accelerator. In the embodiment, the anti-aging agent is MP, and the accelerator is DPTT.
The preparation method comprises the following steps:
1) placing a heat conduction material, a vulcanizing agent and an additive in deionized water, heating at 50 ℃ and carrying out ultrasonic treatment at 50kHz for 1h to prepare a dispersion liquid, and drying at 120 ℃ for 10h to obtain a powdery material;
2) plasticating the perfluororubber; mixing the powdery material obtained in the step 1) with the plasticated perfluororubber, and mixing the mixture by a rubber mixing roll to prepare perfluororubber mixed rubber; in the dispersion liquid, the heat conduction material is 50g/L, the plastication temperature is 100 ℃, the plastication time is 10min, the mixing temperature is 100 ℃, and the mixing time is 20 min;
3) polishing and grinding the inner wall of the steel pipeline to be smooth, and smearing a rubber binder; and then, the rubber compound is subjected to calendering molding on the inner wall of the steel pipeline through a conveyor and a calender, and then vulcanized at 140 ℃.
Example 2
A pipeline for preventing scabbing in the dissolution process of aluminum oxide production comprises a steel pipeline body, wherein a hydrophobic layer is arranged on the inner surface of the steel pipeline body, the hydrophobic layer is a perfluorinated rubber inner liner layer, and the thickness of the hydrophobic layer is 1 mm; the hydrophobic layer is prepared from the following raw materials in percentage by weight: 60% of perfluororubber, 10% of graphene, 10% of carbon black, 5% of additive and 15% of vulcanizing agent. The vulcanizing agent is a peroxide vulcanizing agent; the additive consists of 5 parts by weight of anti-aging agent and 0.5 part by weight of accelerator. In this example, the antioxidant was antioxidant DNP and the accelerator was accelerator CZ.
The preparation method comprises the following steps:
1) putting a heat conduction material, a vulcanizing agent and an additive into deionized water, heating at 70 ℃ and carrying out ultrasonic treatment at 20kHz for 0.2h to prepare a dispersion liquid, and drying at 100 ℃ for 24h to obtain a powdery material;
2) plasticating the perfluororubber; mixing the powdery material obtained in the step 1) with the plasticated perfluororubber, and fully mixing the mixture by a rubber mixing roll to prepare perfluororubber compound; the content of the heat conducting material in the dispersion liquid is 150 g/L; in the step 2), the plasticating temperature is 130 ℃, the plasticating time is 3min, the mixing temperature is 130 ℃, and the mixing time is 10 min;
3) polishing and grinding the inner wall of the steel pipeline to be smooth, and smearing a rubber binder; and then, the rubber compound is subjected to calendering molding on the inner wall of the steel pipeline by a conveyor and a calender, and then vulcanization treatment is carried out at 150 ℃.
Example 3
Compared with the embodiment 1, the anti-scarring pipeline in the dissolution process of alumina production and the preparation method thereof in the embodiment are characterized in that: the thickness of the hydrophobic layer is 3 mm; the hydrophobic layer is prepared from the following raw materials in percentage by weight: 80% of perfluororubber, 1.5% of graphene, 1.5% of carbon black, 2% of additive and 15% of vulcanizing agent. The accelerator in the additive was accelerator NS, as in example 1.
Example 4
The difference between the pipe for preventing scab in the dissolution process of alumina production and the preparation method thereof in this embodiment and the embodiment 1 is that: the hydrophobic layer is prepared from the following raw materials in percentage by weight: 80% of perfluororubber, 10% of vulcanizing agent and 10% of additive. The rest is the same as in example 1.
Example 5
Compared with the embodiment 1, the anti-scarring pipeline in the dissolution process of alumina production and the preparation method thereof in the embodiment are characterized in that: the hydrophobic layer is prepared from the following raw materials in percentage by weight: 85% of perfluororubber, 4% of graphene, 10% of a vulcanizing agent and 1% of an additive. The rest is the same as in example 1.
In other embodiments, the heat conductive material may also be one or a mixture of two or more of graphene, graphite, carbon fiber, carbon nanotube, and carbon black.
And (3) performance testing:
in order to illustrate the effect of the invention, the traditional common pipeline (the steel pipeline without the hydrophobic layer) is taken as a comparative example, the scab amount of the pipeline (the embodiment 1 of the invention) and the scab amount of the traditional common pipeline are respectively tested, and the results of two months later respectively show that the scab amount of the pipeline of the invention per unit length can be reduced by 50-70% compared with the traditional common pipeline. This indicates that the present invention has good anti-scarring properties.
The above description is only an example of the present invention and is not intended to limit the present invention. Without departing from the principle of the invention, several improvements and modifications can be made to the invention, and these improvements and modifications also fall within the scope of the claims of the invention.
Claims (10)
1. A pipeline for preventing scabbing in the dissolution process of alumina production is characterized in that: the pipeline comprises a steel pipeline body, and a hydrophobic layer is arranged on the inner surface of the steel pipeline body.
2. The aluminum oxide production dissolution process scab prevention pipe as recited in claim 1, wherein: the hydrophobic layer is a fluorine rubber inner liner layer, and the thickness of the fluorine rubber inner liner layer is 1-3 mm.
3. The alumina production digestion process scab prevention pipe according to claim 2, wherein: the heat conduction materials are dispersed in the fluororubber lining layer, and the content of the heat conduction materials is 0-20 wt%.
4. The alumina production digestion process scab prevention pipe according to claim 2, wherein: the heat conduction material is one or a mixture of more than two of graphene, graphite, carbon fiber, carbon nano tube and carbon black.
5. The alumina production digestion process scab prevention pipe according to any one of claims 1 to 4, wherein: the hydrophobic layer is prepared from the following raw materials in percentage by weight: 60-85% of fluororubber, 0-20% of heat conducting material, 10-15% of vulcanizing agent and 1-10% of additive.
6. The anti-scarring pipeline for use in a dissolution process in alumina production according to claim 5, wherein: the fluororubber is perfluororubber; the vulcanizing agent is a peroxide vulcanizing agent; the additive consists of 0.5 to 5 weight portions of anti-aging agent and 0.5 to 5 weight portions of accelerator.
7. The anti-scarring conduit for use in a digestion process in alumina production according to claim 6, wherein: the anti-aging agent is: and one or two of antioxidant MP and antioxidant DNP are mixed, and the promoter is one or more of promoter DPTT, promoter CZ and promoter NS.
8. The method for preparing the anti-scarring pipeline in the dissolution process of alumina production according to claim 5, wherein: the method comprises the following steps:
1) adding water into a heat conduction material, a vulcanizing agent and an additive to disperse to obtain a dispersion liquid, and drying to obtain a powdery material;
2) plasticating the fluororubber, and adding the powder product obtained in the step (1) to the plasticated fluororubber for mixing to obtain mixed rubber;
3) polishing and grinding the inner wall of the steel pipeline body to be smooth, and smearing a rubber adhesive; and (3) calendering and molding the rubber compound obtained in the step 2) on the inner wall of the steel pipeline body, and vulcanizing to obtain the rubber compound.
9. The method for preparing the anti-scarring pipeline in the dissolution process of alumina production according to claim 8, wherein: in the step 1), the water is deionized; dispersing by adopting a heating and/or ultrasonic treatment mode, wherein the content of the heat conducting material in the dispersion liquid is 0-150 g/L, the drying temperature is 100-120 ℃, and the drying time is 10-24 h; in the step 2), the plasticating temperature is 100-130 ℃, and the plasticating time is 3-10 min; the mixing temperature is 100-130 ℃, and the mixing time is 10-20 min; in the step 3), the vulcanization temperature is 140-150 ℃.
10. The method for preparing the anti-scarring pipeline in the dissolution process of alumina production according to claim 9, wherein: in the step 1), when heating and dispersing are adopted, the temperature is 50-70 ℃, and the time is 0.2-1 h; when ultrasonic dispersion is adopted, the ultrasonic frequency is 20 kHz-50 kHz, and the ultrasonic time is 0.2 h-1 h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010041047.8A CN111087721A (en) | 2020-01-15 | 2020-01-15 | Pipeline for preventing scab in dissolution process of aluminum oxide production and preparation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010041047.8A CN111087721A (en) | 2020-01-15 | 2020-01-15 | Pipeline for preventing scab in dissolution process of aluminum oxide production and preparation method |
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| CN111087721A true CN111087721A (en) | 2020-05-01 |
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| CN202010041047.8A Pending CN111087721A (en) | 2020-01-15 | 2020-01-15 | Pipeline for preventing scab in dissolution process of aluminum oxide production and preparation method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001293492A (en) * | 2000-04-11 | 2001-10-23 | Takuma Co Ltd | Gas diffusing pipe and gas blowing device |
| CN103591391A (en) * | 2013-07-17 | 2014-02-19 | 扬州巨业耐磨复合材料有限责任公司 | Method for processing rubber composited steel pipes |
| CN104479261A (en) * | 2014-12-10 | 2015-04-01 | 平顶山华瑞锦橡耐磨材料有限公司 | Wear-resistant and washout-resistant rubber material and preparation method thereof |
| CN205036975U (en) * | 2015-08-21 | 2016-02-17 | 青岛联合创新日化用品有限公司 | Combined water pipe |
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2020
- 2020-01-15 CN CN202010041047.8A patent/CN111087721A/en active Pending
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|---|---|---|---|---|
| JP2001293492A (en) * | 2000-04-11 | 2001-10-23 | Takuma Co Ltd | Gas diffusing pipe and gas blowing device |
| CN103591391A (en) * | 2013-07-17 | 2014-02-19 | 扬州巨业耐磨复合材料有限责任公司 | Method for processing rubber composited steel pipes |
| CN104479261A (en) * | 2014-12-10 | 2015-04-01 | 平顶山华瑞锦橡耐磨材料有限公司 | Wear-resistant and washout-resistant rubber material and preparation method thereof |
| CN205036975U (en) * | 2015-08-21 | 2016-02-17 | 青岛联合创新日化用品有限公司 | Combined water pipe |
| CN107901396A (en) * | 2017-11-13 | 2018-04-13 | 洛阳国润新材料科技股份有限公司 | A kind of production technology of high abrasion good antiscale property rubber liner pipeline |
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| Title |
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| 孙磊: "低表面能防垢内管的开发与应用", 《石化技术》 * |
| 牛学军: "钢橡复合管在发电厂除灰系统的应用", 《内蒙古电力技术》 * |
| 王豫川: "管道化溶出装置改进途径", 《知识经济》 * |
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