CN105881775A - Wind power blade recovery treatment method - Google Patents
Wind power blade recovery treatment method Download PDFInfo
- Publication number
- CN105881775A CN105881775A CN201610103853.7A CN201610103853A CN105881775A CN 105881775 A CN105881775 A CN 105881775A CN 201610103853 A CN201610103853 A CN 201610103853A CN 105881775 A CN105881775 A CN 105881775A
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- CN
- China
- Prior art keywords
- treatment method
- wind electricity
- electricity blade
- particulate matter
- granule
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Classifications
-
- 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
-
- 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
- B29B17/04—Disintegrating plastics, e.g. by milling
- B29B17/0412—Disintegrating plastics, e.g. by milling to large particles, e.g. beads, granules, flakes, slices
-
- 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
- B29B2017/0237—Mechanical separating techniques; devices therefor using density difference
- B29B2017/0241—Mechanical separating techniques; devices therefor using density difference in gas, e.g. air flow
-
- 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
- B29B17/04—Disintegrating plastics, e.g. by milling
- B29B2017/0424—Specific disintegrating techniques; devices therefor
- B29B2017/044—Knives
-
- 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
- B29B17/04—Disintegrating plastics, e.g. by milling
- B29B2017/0424—Specific disintegrating techniques; devices therefor
- B29B2017/0468—Crushing, i.e. disintegrating into small particles
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- 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
- Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
-
- 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)
- Crushing And Pulverization Processes (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
The invention relates to the technical field of wind power blades, and discloses a wind power blade recovery treatment method. The wind power blade recovery treatment method comprises the following steps: a wind power blade is cut to blade blocks with the biggest size not more than 2 m by a rope saw; the blade blocks are crushed to particles with the biggest size not more than 5 cm; the particles are separated out resin particles, glass fiber particles and light material particles according to the material types; the density of the light material particles is lower than the densities of the resin particles and the glass fiber particles; and the resin particles are crushed to powder of 40-1250 meshes. The wind power blade recovery treatment method improves the wind power blade recovery treatment efficiency, reduces the operation difficulty, and is high in safety; and the prepared powder is wider in utilization field compared with massive materials.
Description
Technical field
The present invention relates to wind electricity blade field, particularly to a kind of wind electricity blade recovery and treatment method.
Background technology
Wind electricity blade mainly uses thermosets and fibrous material to make, and length of blade is: more than 40m,
Breadth Maximum is: more than 2m, bulky.When wind electricity blade arrives useful life, need it is carried out
Process, currently without more ripe processing method, be all to be cut to relatively small by the mode of artificial cutting
Vanes block in case recycling or abandon (the most all abandoning, secondary utilizes limited).Owing to blade volume is big
(length length), and Heavy Weight, artificial cut-off blade, operation easier is big, and safety is the highest and efficiency is low.
Summary of the invention
The present invention proposes a kind of wind electricity blade recovery and treatment method, solves artificial cut-off blade in prior art,
Operation easier is big, and safety is the highest, efficiency is low and secondary utilizes limited problem.
The wind electricity blade recovery and treatment method of the present invention, including:
Described wind electricity blade use rope sawing be slit into the full-size vanes block less than 2m；
Described vanes block is broken into the full-size particulate matter less than 5cm, and described particulate matter is pressed material
Material type separates, to isolate resin particle, glass granule and light material granule, and described lightweight thing
The density of material granule is respectively less than resin particle and the density of glass granule；
Described resin particle is ground into the powder of 40～1250 mesh.
Wherein, the cutter at rope saw is arranged around at least four flush points, and described wind electricity blade uses rope saw
During cutting into the bulk that full-size is less than 2m, at least two flush points carries out bath fall to cutter
Temperature, remaining flush points is standby.
Wherein, the described full-size that described vanes block is broken into is less than the particulate matter of 5cm, and to described
The step that particulate matter is carried out separating by material type includes:
Use the first shredder that described vanes block carries out the vanes block conveying after tearing up, and will tear up for the first time
To the second cyclopentane gas detector；
Vanes block after second shredder will tear up for the first time carries out tearing up for the second time, is formed and is smaller in size than first
Secondary tear up after vanes block, will second time tear up after vanes block transmit to pulverizer；
Vanes block after second time is torn up by pulverizer is pulverized, and forms described full-size less than 5cm
Particulate matter；
By grader and airflow separator, described particulate matter is separated, isolate resin particle, glass
Granule and light material granule.
Wherein, described by grader and airflow separator, described particulate matter is separated, isolate resin
The step of granule, glass granule and light material granule includes:
Described particulate matter is blown into by materiel fan in the grader being positioned at above described airflow separator, point
The air-flow that the classifying turbine of level machine produces is by dust and described particulate separation；
The particulate matter freely falling body separated is to described airflow separator, to isolate resin particle, glass granule
With light material granule.
Wherein, also include carrying out at dedusting and filtration from the isolated air-flow with dust of described grader
Reason.
Wherein, the air-flow of described airflow separator is by discharging after dust removal and filtration.
Wherein, transmitted to pulverizer by the vanes block after second time being torn up with the transmission belt of magnetic separator.
Wherein, also include before described cutting: the metal objects on dismounting wind electricity blade, described metal objects
Including: metal lightning conducter, blade tip aluminium alloy and leaf WEILIAN connecting bolt.
The wind electricity blade recovery and treatment method of the present invention improves the efficiency of the recycling of wind electricity blade, reduction
Operation easier, safety are high, and the material of the powder relative bulk made utilizes field wider.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to enforcement
In example or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, describe below
In accompanying drawing be only some embodiments of the present invention, for those of ordinary skill in the art, do not paying
On the premise of going out creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is a kind of wind electricity blade recovery and treatment method flow chart of the present invention；
Fig. 2 is the particular flow sheet of step S120 in Fig. 1；
Fig. 3 is that resin particle, glass granule separate schematic diagram with light material granule.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clearly
Chu, be fully described by, it is clear that described embodiment be only a part of embodiment of the present invention rather than
Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creation
The every other embodiment obtained under property work premise, broadly falls into the scope of protection of the invention.
The wind electricity blade recovery and treatment method of the present embodiment is as it is shown in figure 1, include:
Step S110, uses rope sawing to be slit into the full-size vanes block less than 2m by described wind electricity blade
(vanes block is block, and block longest edge size is less than 2m, such as: 2m × 1m × 0.2m).Cutting is general
(ground installed by wind-driven generator) cutting at the scene, cutting in bulk rear is just transported.
Step S120, is broken into the full-size particulate matter less than 5cm (preferably by described vanes block
8mm, in order to powder process afterwards), and described particulate matter is separated by material type, to isolate resin
(including: the light material such as PVC granule, Ba Shamu, material is close for grain, glass granule and light material granule
Spend lower more than 10 times than glass fibre).
Step S130, is ground into the powder of 40～1250 mesh, such as 60～140 mesh secondaries by described resin particle
The purposes ratio utilized is wide.
The wind electricity blade recovery and treatment method of the present embodiment improves the efficiency of the recycling of wind electricity blade, fall
Low operation easier, safety are high；It is simultaneously achieved and reclaims resin particle, glass granule and lightweight by type
Material particles；And the material of the powder relative bulk made utilizes field wider, in order to carry out secondary utilization.
In step S110, the heat damages cutter produced with blade rubbing in order to avoid the cutter of rope saw, at rope
The cutter of saw is arranged around at least four flush points, and described wind electricity blade uses rope sawing be slit into full-size
During the bulk of 2m, at least two flush points carries out bath cooling, remaining flush points to cutter
Standby.
In the present embodiment, the idiographic flow of step S120 is as in figure 2 it is shown, include:
Step S121, after using the first shredder to carry out described vanes block tearing up, and will tear up for the first time
Vanes block is transported to the second cyclopentane gas detector.
Step S122, the vanes block after the second shredder will tear up for the first time carries out tearing up for the second time, forms chi
Very little less than the vanes block after tearing up for the first time, the vanes block after second time being torn up is transmitted to pulverizer.This reality
Executing example, (secondary shredder granularity is less than secondary shredder to use twice varigrained shredder
Granularity), vanes block is torn up the size of particulate matter close to 5cm (i.e. slightly larger than 5cm), compares one
Secondary tearing up, fragment size is evenly.
Step S123, the vanes block after second time is torn up by pulverizer is pulverized, and forms described full-size
Particulate matter less than 5cm.
Step S124, is separated described particulate matter by grader and airflow separator, isolates resin
Granule, glass granule and light material granule.
Owing to blade material hardness is high, toughness is strong, and Heavy Weight, process extremely difficult for blade material,
It is processed into the material less than 5cm currently without more perfect processing mode, and by core, glass fibers
Dimension, resin effectively separate, and in order to solve the problems referred to above, in the present embodiment, step S124 includes:
As it is shown on figure 3, described particulate matter is blown into (shown in solid arrow) by materiel fan be positioned at air-flow
(particulate matter enters grader 1 from the mouth shown in solid arrow), classification in grader 1 above separator 2
The air-flow that the classifying turbine 11 of machine 1 produces by dust (air-flow takes away dust, air-flow as the dotted line arrows,
Enter dedusting and the flow process of filtration treatment) and described particulate separation.
The particulate matter freely falling body separated is to described airflow separator 2, to isolate resin particle, glass granule
With light material granule.
Particulate matter is acted on the common of ascending air by mechanical vibration after entering airflow separator 2 simultaneously.Root
According to material physical characteristic, different materials can carry out well-regulated sequence motion by proportion shape.Than great and
The granule that diameter is big moves upward, and discharges from higher discharging opening 21, and the granule that proportion is little and diameter is little is downward
Motion, discharges from relatively low discharging opening 22, the lighter light material granule of quality with ascending air from top
Mouth flows away (as shown in dotted line arrow), thus resin particle, glass and PVC is separated.Specifically
Ground, resin particle will flow out below airflow separator 2, and glass granule flows out above airflow separator 2,
The light material granule of some relatively lightweights, by under the effect by the negative-pressure air-flow above airflow separator, is inhaled into
Another first cyclopneumatic separator, discharges below the first cyclone separator.
In order to avoid environmental pollution, also include carrying out from the isolated air-flow with dust of described grader
Dedusting and filtration treatment.Dust is separated with gas by dust by cyclopneumatic separator, and dust is divided by the second whirlwind
The lower section disembarked is collected, then is imported by air-flow in the dust removal and filtration pipeline remaining a small amount of dust of filtration and air-flow
Abnormal flavour.
And, airflow separator air-flow out is by discharging after dust removal and filtration, and the first cyclopneumatic separator will be light
Matter material particles separates with gas, and light material granule is collected by the lower section of the first cyclopneumatic separator, then by gas
Stream imports dust removal and filtration pipeline and removes the abnormal flavour in air-flow.
In the present embodiment, in step S122, by the leaf after second time being torn up with the transmission belt of magnetic separator
Tile transmission, to pulverizer, damages pulverizer to avoid the metalwork in blade to enter pulverizer.
In the present embodiment, the most also include: the metal objects on dismounting wind electricity blade, described metal
Object includes: metal lightning conducter, blade tip aluminium alloy and leaf WEILIAN connecting bolt, it is to avoid metalwork is to follow-up
Step has undesirable effect.
In the present embodiment, the product after broken and powder process may be used for but is not limited to following field:
Resin particle after Po Sui and glass granule, especially 2cm particles below can do packing material, increasing
Strong material and add tough material etc., such as: do mixed earth reinforcing material, artificial stone reinforcing material etc., to strengthen this
A little concrete and the intensity of artificial stone, reduce cost simultaneously.Light material granule equally does filling material
Material is to alleviate finished product density and weight.
Resin powder can develop aggregate class (as concrete strengthens based on crushing technology and activating and regenerating technology
Material, exterior wall true stone paint aggregate etc.), decorative kind is (in dining table, kitchen countertop, toilet interior trim, vehicle
Decorations etc.), non-structural class (such as Paving bricks, outdoor Wood-plastic material, guardrail, artificial stone etc.), structure class (as
FRP overpass, plank road etc.) four big serial end products.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all the present invention's
Within spirit and principle, any modification, equivalent substitution and improvement etc. made, should be included in the present invention's
Within protection domain.
Claims (8)
1. a wind electricity blade recovery and treatment method, it is characterised in that including:
Described wind electricity blade use rope sawing be slit into the full-size vanes block less than 2m；
Described vanes block is broken into the full-size particulate matter less than 5cm, and described particulate matter is pressed material
Material type separates, to isolate resin particle, glass granule and light material granule, and described lightweight thing
The density of material granule is respectively less than resin particle and the density of glass granule；
Described resin particle is ground into the powder of 40～1250 mesh.
2. wind electricity blade recovery and treatment method as claimed in claim 1, it is characterised in that at the cutter of rope saw
Tool is arranged around at least four flush points, described wind electricity blade uses rope sawing be slit into full-size and is less than
During the bulk of 2m, at least two flush points carries out bath cooling to cutter, and remaining flush points is standby.
3. wind electricity blade recovery and treatment method as claimed in claim 1, it is characterised in that described by described
Vanes block is broken into the full-size particulate matter less than 5cm, and carries out described particulate matter by material type
The step separated includes:
Use the first shredder that described vanes block carries out the vanes block conveying after tearing up, and will tear up for the first time
To the second cyclopentane gas detector；
Vanes block after second shredder will tear up for the first time carries out tearing up for the second time, is formed and is smaller in size than first
Secondary tear up after vanes block, will second time tear up after vanes block transmit to pulverizer；
Vanes block after second time is torn up by pulverizer is pulverized, and forms described full-size less than 5cm
Particulate matter；
By grader and airflow separator, described particulate matter is separated, isolate resin particle, glass
Granule and light material granule.
4. wind electricity blade recovery and treatment method as claimed in claim 3, it is characterised in that described by dividing
Described particulate matter is separated by level machine and airflow separator, isolates resin particle, glass granule and lightweight
The step of material particles includes:
Described particulate matter is blown into by materiel fan in the grader being positioned at above described airflow separator, point
The air-flow that the classifying turbine of level machine produces is by dust and described particulate separation；
The particulate matter freely falling body separated is to described airflow separator, to isolate resin particle, glass granule
With light material granule.
5. wind electricity blade recovery and treatment method as claimed in claim 4, it is characterised in that also include to from
The isolated air-flow with dust of described grader carries out dedusting and filtration treatment.
6. wind electricity blade recovery and treatment method as claimed in claim 3, it is characterised in that described air-flow divides
Select the air-flow of machine by discharging after dust removal and filtration.
7. wind electricity blade recovery and treatment method as claimed in claim 3, it is characterised in that by with magnetic
Vanes block after second time is torn up by the transmission belt selecting machine is transmitted to pulverizer.
8. the wind electricity blade recovery and treatment method as according to any one of claim 1～7, it is characterised in that
Also include before described cutting: the metal objects on dismounting wind electricity blade, described metal objects includes: metal
Lightning conducter, blade tip aluminium alloy and leaf WEILIAN connecting bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610103853.7A CN105881775A (en) | 2016-02-25 | 2016-02-25 | Wind power blade recovery treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610103853.7A CN105881775A (en) | 2016-02-25 | 2016-02-25 | Wind power blade recovery treatment method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105881775A true CN105881775A (en) | 2016-08-24 |
Family
ID=57014201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610103853.7A Pending CN105881775A (en) | 2016-02-25 | 2016-02-25 | Wind power blade recovery treatment method |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107262500A (en) * | 2017-07-04 | 2017-10-20 | 吉林重通成飞新材料股份公司 | A kind of wind electricity blade waste and scrap method for screening and separating |
| CN107932791A (en) * | 2017-11-16 | 2018-04-20 | 连云港中复连众复合材料集团有限公司 | A kind of wind electricity blade cutting and crushing method and its special purpose device |
| CN108328994A (en) * | 2018-03-29 | 2018-07-27 | 吉林重通成飞新材料股份公司 | A kind of anti-crack concrete and preparation method thereof |
| CN108395147A (en) * | 2018-04-11 | 2018-08-14 | 吉林重通成飞新材料股份公司 | A kind of epoxy resin mortar and floor coatings |
| CN110746684A (en) * | 2019-09-29 | 2020-02-04 | 吉林省远达再生资源有限公司 | Wood-plastic plate and preparation method thereof |
| CN112706315A (en) * | 2019-10-25 | 2021-04-27 | 罗兰·施特 | Recovery of rotor blades |
| CN113102461A (en) * | 2021-04-14 | 2021-07-13 | 保定市万苏电力设备制造有限公司 | Method for treating waste wind power blades |
| CN113351620A (en) * | 2021-05-31 | 2021-09-07 | 华中科技大学 | Method for treating and recycling high-quality fuel and glass fiber by waste fan blade |
| CN113976999A (en) * | 2017-03-23 | 2022-01-28 | Gfsi集团有限责任公司 | Frame-mounted wiresaw cutting system and method |
| CN115090656A (en) * | 2022-05-13 | 2022-09-23 | 北京华能长江环保科技研究院有限公司 | Comprehensive disposal system and comprehensive disposal method for fan blades |
| CN115608748A (en) * | 2022-10-27 | 2023-01-17 | 华能阜新风力发电有限责任公司 | Method for recovering balsa from retired wind power blades |
| CN115716346A (en) * | 2022-11-17 | 2023-02-28 | 合肥工业大学 | Waste glass fiber reinforced plastic wind power blade recovery production line and recovery method thereof |
| CN116944209A (en) * | 2023-09-20 | 2023-10-27 | 国能龙源环保有限公司 | Method for treating waste wind power blade cutting dust |
| WO2024103672A1 (en) * | 2022-11-14 | 2024-05-23 | 国能龙源环保有限公司 | Method for enriching glass fibers in waste wind turbine blades |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113976999A (en) * | 2017-03-23 | 2022-01-28 | Gfsi集团有限责任公司 | Frame-mounted wiresaw cutting system and method |
| CN107262500A (en) * | 2017-07-04 | 2017-10-20 | 吉林重通成飞新材料股份公司 | A kind of wind electricity blade waste and scrap method for screening and separating |
| CN107932791A (en) * | 2017-11-16 | 2018-04-20 | 连云港中复连众复合材料集团有限公司 | A kind of wind electricity blade cutting and crushing method and its special purpose device |
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| CN108328994A (en) * | 2018-03-29 | 2018-07-27 | 吉林重通成飞新材料股份公司 | A kind of anti-crack concrete and preparation method thereof |
| CN108395147A (en) * | 2018-04-11 | 2018-08-14 | 吉林重通成飞新材料股份公司 | A kind of epoxy resin mortar and floor coatings |
| CN110746684A (en) * | 2019-09-29 | 2020-02-04 | 吉林省远达再生资源有限公司 | Wood-plastic plate and preparation method thereof |
| CN112706315A (en) * | 2019-10-25 | 2021-04-27 | 罗兰·施特 | Recovery of rotor blades |
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Application publication date: 20160824 |