CN102431071A - Straw fiber board manufacturing method and liquid ball mill with plastic lining boards - Google Patents
Straw fiber board manufacturing method and liquid ball mill with plastic lining boards Download PDFInfo
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- CN102431071A CN102431071A CN201110326622XA CN201110326622A CN102431071A CN 102431071 A CN102431071 A CN 102431071A CN 201110326622X A CN201110326622X A CN 201110326622XA CN 201110326622 A CN201110326622 A CN 201110326622A CN 102431071 A CN102431071 A CN 102431071A
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- stalk
- straw
- plastic layer
- straw fiber
- ball mill
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Abstract
The invention discloses a straw fiber board manufacturing method. The straw fiber board manufacturing method includes that 1, straws are cut into sections with lengths ranging from 5mm to 15mm, 2, the straws are inputted into a liquid ball mill with plastic lining boards, water is filled in the liquid ball mill, hydrofluoric acid is added into the liquid ball mill, after grinding, a pH (potential of hydrogen) value ranges from 5 to 6, the pH value is changed to range from 6 to 7 by means of washing, and then centrifugal separation is carried out, 3, straw blocks are subject to defibrator process in a defibrator so that straw fibers are produced, 4, the straw fibers are conveyed to a sizing system to realize sizing and then are dried, and 5, the straw fibers are in hot-pressing, edging and sanding after being laid, so that straw fiber boards are produced. By the aid of acidifying processing of the straws, the hydrofluoric acid is immersed into cells, SiO2 is further dissolved, SiO2 content in the straw fibers is greatly reduced, an adhesion performance of the straw fibers is improved, and the strength of the straw fiber boards is further increased. The straws are ground by the liquid ball mill with the plastic fining boards, particles are uniform after the straws are ground, a lining of a bin of the liquid ball mill with the plastic lining boards is an abrasion-resistant plastic layer, an outer layer of a grinding ball is an abrasion-resistant plastic layer, and the inner wall of the liquid ball mill cannot be corroded.
Description
Technical field
The present invention relates to a kind of manufacturing approach and plastics lining board liquid spheres grinding machine of straw fiber board.
Background technology
Straw sheet material has that intensity height, product breadth are big, fire prevention, waterproof, environmental protection, characteristics such as with low cost.The product designs and varieties are various, and hundreds of is arranged, and product can be followed closely, saws, digs, glue, and has and identical application of wood based panel and processing characteristics.Be widely used in the interior decoration such as wall, door and window, dado, furred ceiling in market, hotel, wineshop, nightclub, station, office building, room, also of many uses aspect top-grade furniture, door, compartment.At present, the technology of stalk system wood-based plate generally is with flooding after the crushed stalk, uses adhesive to mix then, mats formation, and after precompressed and the hot pressing, straw fiber board is processed in the edging sanding.But, on the stalk surface one deck dense microstructure is arranged, i.e. epidermis, epidermis is the outmost confluent monolayer cells of stalk, it comprises and almost is full of SiO
2Silicon cell and bolt cell plastid, and SiO
2In fiber, formed nonpolar surface structure, influenced, reduced the intensity of plate the absorption of adhesive and the formation of hydrogen bond.Simultaneously, there is the tangible wax coat of one deck on the stalk surface, and frictional force is less between the stalk, use adhesive after, being difficult to see through this surface, to get into stalk inner, the ability that produces chemical reaction with hydroxyl reduces greatly, and the production of straw fiber board is had a negative impact.At present, the technology of stalk system wood-based plate generally is with dry after the crushed stalk, uses adhesive to mix then, mats formation, and after precompressed and the hot pressing, straw fiber board is processed in the edging sanding.When making straw fiber board, very difficult.
Summary of the invention
The technical problem that the present invention will solve provides a kind of SiO that effectively removes the stalk surface
2The manufacturing approach of the straw fiber board that makes.
Technical scheme of the present invention is: a kind of manufacturing approach of straw fiber board, and its step is following:
(1) stalk is cut into the section of 5-15mm, remove broken leaf, silt impurity, remove de-iron through magnetic drum again;
(2) stalk is imported water filling in the plastics lining board liquid spheres grinding machine, add hydrofluoric acid, grinding back pH is 5-6, wash to pH be 6-7, centrifugation then;
(3) fibre is separated in the defibrator process in defibrator of stalk piece, obtained stalk fibre;
(4) stalk fibre is sent to the glue system applying glue, dry then;
(5) stalk fibre is mated formation with the air-flowing type spreading machine after, use hot press hot pressing, straw fiber board is processed in the edging sanding.
In the said step (2) stalk is imported water filling in the plastics lining board liquid spheres grinding machine, add hydrofluoric acid, grinding back pH is 5-6, adds sulfuric acid again, and stirring after washing is 6-7 to pH, centrifugation then.
Said step is sent to the glue system applying glue with stalk fibre in (4), and the mass ratio of adhesive and stalk is 1:8-12; Said adhesive is water-soluble phenolic resin adhesive or cyanurotriamide modified urea resin glue.
The hot pressing temperature of hot press is 170-190 ℃ in the said step (5), and the time is 18-25s/mm, and the surface pressure of hot pressing is 2.0-4.0MPa.
Described plastics lining board liquid spheres grinding machine; Comprise revolving power mechanism, bearing shell and feed bin, feed bin is provided with charging aperture and discharging opening, is provided with mill ball in the feed bin; It is characterized in that: be lined with the wear-resistant plastic layer in charging aperture and discharging opening and the feed bin, said mill ball skin is the wear-resistant plastic layer.
Said wear-resistant plastic layer is PTFE anti-wear plastic layer or ultrahigh molecular weight polyethylene abrasion-proof plastic layer.
The diameter of said mill ball is 3-8cm.
The thickness of said wear-resistant plastic layer is 1-2 cm.
The invention has the beneficial effects as follows: in the acidification stalk, on one side acidifying use plastics lining board liquid spheres grinding machine sledge mill on one side, make hydrofluoric acid immerse cell, dissolving SiO
2, reach and remove SiO
2Purpose, significantly reduce SiO in the stalk fibre
2Content, improve the glue performance of stalk fibre, further improve the intensity of straw fiber board; After stalk carried out steam treatment,, isolate the cellulose of stalk with stalk defibrator process in defibrator.Use plastics lining board liquid spheres grinding machine mill stalk, grind the back uniform particles, the feed bin liner of plastics lining board liquid spheres grinding machine is the wear-resistant plastic layer; The mill ball skin is the wear-resistant plastic layer, does not corrode plastics lining board liquid spheres grinding machine inwall, in the process of rolling; Hydrofluoric acid more is prone to penetrate into stalk dense skin cell; Remove silicon cell and bolt cell plastid, and skin is that the grinding dynamics of mill ball of wear-resistant plastic layer is little, can stalk do not pulverized.Straw fiber board of the present invention is of close texture, after saw is separated processing, and than common particieboard, surfacing, bright and clean, the surface roughness Ra of edges of boards is the 6-8 micron; After straw fiber board boring, the surface roughness Ra in the straw fiber board boring is the 10-12 micron, and the plate face diameter deviation of straw fiber board is the 0.2-0.4 millimeter, and density is 880-950kg/cm
3, internal bond strength is 0.5-0.6MPa, and MOR is 25-40MPa, and elastic modelling quantity is 2500-3000MPa, and it is 1500-1600N that the plate face is held screw power.
Description of drawings
Fig. 1 is a sketch map of the present invention.
The specific embodiment
Embodiment 1
A kind of manufacturing approach of straw fiber board, its step is following:
(1) the wheat straw stalk is cut into the section of 5-15mm, remove broken leaf, silt impurity, remove de-iron through magnetic drum again;
(2) with the stalk piece after stirring is scattered, in the input plastics lining board liquid spheres grinding machine, water filling then; The addition of water is as the criterion with the submergence stalk, adds hydrofluoric acid, and the concentration of hydrofluoric acid is 47%; Adjusting pH is 5-6, and stirring after washing is 6-7 to pH, centrifugation then;
By chemical formula SiO
2+ 4HF=SiF
4+ 2H
2O, 4 SiF
4+ 3H
2O+ 2HF=3H
2SiF
6+ H
2SiO
3, before the large-scale production,, add hydrofluoric acid according to different stalk amounts according to the stalk of different regions; Grind the back and detect the pH value, finding out and grinding back pH is that Unit Weight adds the corresponding amount of hydrofluoric acid before the corresponding grinding of 5-6, takes to add less earlier; The mode of adding again after grind detecting is 5-6 to grinding back pH, can prevent that acidity from crossing ambassador's stalk fibre and damaging; The addition of hydrofluoric acid is calculated, and calculates with the 100 kilograms of wheat straw stalks in Zhumadian area, needs to add 0.4 kilogram in hydrofluoric acid;
The sketch map of plastics lining board liquid spheres grinding machine is as shown in Figure 1, comprises revolving power mechanism, bearing shell 4 and feed bin 6, and feed bin is provided with charging aperture 5 and discharging opening; Be provided with mill ball 2 in the feed bin; The centre of sphere of mill ball can be steel ball or other ball of metallic material, is lined with wear-resistant plastic layer 1 in charging aperture and discharging opening and the feed bin, and said mill ball skin is the wear-resistant plastic layer; The wear-resistant plastic layer is PTFE anti-wear plastic layer or ultrahigh molecular weight polyethylene abrasion-proof plastic layer; Mill ball is solid-core polyfluortetraethyleinsulating wear-resistant plastic ball or solid ultrahigh molecular weight polyethylene abrasion-proof baton round, and the diameter of mill ball is 3-8cm, and the thickness of wear-resistant plastic layer is 1-2 cm;
Plastics lining board liquid spheres grinding machine be exactly in existing liquid spheres grinding machine all positions that contact with abrasive all add the wear-resistant plastic layer;
(3) fibre is separated in the defibrator process in defibrator of stalk piece, obtained stalk fibre;
(4) with stalk in defibrator after the defibrator process, it is even in order to ensure applying glue to be sent to the glue system applying glue, the consumption proportioning that should guarantee adhesive and stalk is a constant constant; The mass ratio of adhesive and stalk is 1:12, and adhesive is a cyanurotriamide modified urea resin glue, and is dry then; Dry to adopt steam be medium, and to add hot-air, the stalk fibre of having executed glue is blowed by hot blast in pipeline and advances; Dry good fiber is admitted to efficient cyclone separator; Here stalk fibre is separated with humid air, damp-heat air is discharged in the atmosphere, and dried stalk fibre moisture content is 8-10%;
(5) stalk fibre that will mix glue is mated formation with the air-flowing type spreading machine, and the slab after mating formation has loose thickness, through precompressed, can reduce the thickness of slab, has improved the quality of slab simultaneously, has also avoided the breakage in the transportation.Hot press adopts form of single sheet, and hot pressing temperature 170-190 ℃, hot pressing time is 22s/mm; The surface pressure of hot pressing is 3.0-4.0MPa, and the sheet material after the completion hot pressing is placed on cooling under the normal temperature, and cooling purpose is that the temperature of sheet material is reduced; Eliminate the plate internal stress, prevent the plank distortion, cooling back cutting edge; Book size is 1220mmx2440mm, the plate face specification of standard, and stacking carried out sanding in 48 hours.
Embodiment 2
A kind of manufacturing approach of straw fiber board, its step is following:
(1) the wheat straw stalk is cut into the section of 5-15mm, remove broken leaf, silt impurity, remove de-iron through magnetic drum again;
(2) with the stalk piece after stirring is scattered, in the input plastics lining board liquid spheres grinding machine, water filling then; The addition of water is as the criterion with the submergence stalk, adds hydrofluoric acid, and the concentration of hydrofluoric acid is 47%; Adjusting pH is 5-6, and then adds sulfuric acid, the adding amount of substance of sulfuric acid be hydrofluoric acid amount of substance 1/10; Purpose is to remove the bolt cell plastid of stalk, and stirring after washing is 6-7 to pH, centrifugation then;
By chemical formula SiO
2+ 4HF=SiF
4+ 2H
2O, 4 SiF
4+ 3H
2O+ 2HF=3H
2SiF
6+ H
2SiO
3, before the large-scale production,, add hydrofluoric acid according to different stalk amounts according to the stalk of different regions; Grind the back and detect the pH value, finding out and grinding back pH is that Unit Weight adds the corresponding amount of hydrofluoric acid before the corresponding grinding of 5-6, takes to add less earlier; The mode of adding again after grind detecting is 5-6 to grinding back pH, can prevent that acidity from crossing ambassador's stalk fibre and damaging; The addition of hydrofluoric acid is calculated, and calculates with the 100 kilograms of wheat straw stalks in Zhumadian area, needs to add 0.4 kilogram in hydrofluoric acid;
The sketch map of plastics lining board liquid spheres grinding machine is as shown in Figure 1, comprises revolving power mechanism, bearing shell 4 and feed bin 6, and feed bin is provided with charging aperture 5 and discharging opening; Be provided with mill ball 2 in the feed bin; The centre of sphere of mill ball can be steel ball or other ball of metallic material, is lined with wear-resistant plastic layer 1 in charging aperture and discharging opening and the feed bin, and said mill ball skin is the wear-resistant plastic layer; The wear-resistant plastic layer is PTFE anti-wear plastic layer or ultrahigh molecular weight polyethylene abrasion-proof plastic layer; Mill ball is solid-core polyfluortetraethyleinsulating wear-resistant plastic ball or solid ultrahigh molecular weight polyethylene abrasion-proof baton round, and the diameter of mill ball is 3-8cm, and the thickness of wear-resistant plastic layer is 1-2 cm;
Plastics lining board liquid spheres grinding machine be exactly in existing liquid spheres grinding machine all positions that contact with abrasive all add the wear-resistant plastic layer;
(3) fibre is separated in the defibrator process in defibrator of stalk piece, obtained stalk fibre;
(4) with stalk in defibrator after the defibrator process, it is even in order to ensure applying glue to be sent to the glue system applying glue, the consumption proportioning that should guarantee adhesive and stalk is a constant constant; The mass ratio of adhesive and stalk is 1:12, and adhesive is a cyanurotriamide modified urea resin glue, and is dry then; Dry to adopt steam be medium, and to add hot-air, the stalk fibre of having executed glue is blowed by hot blast in pipeline and advances; Dry good fiber is admitted to efficient cyclone separator; Here stalk fibre is separated with humid air, damp-heat air is discharged in the atmosphere, and dried stalk fibre moisture content is 8-10%;
(5) stalk fibre that will mix glue is mated formation with the air-flowing type spreading machine, and the slab after mating formation has loose thickness, through precompressed, can reduce the thickness of slab, has improved the quality of slab simultaneously, has also avoided the breakage in the transportation.Hot press adopts form of single sheet, and hot pressing temperature 170-190 ℃, hot pressing time is 22s/mm, and the surface pressure of hot pressing is 3.0-4.0MPa; Sheet material after the completion hot pressing is placed on cooling under the normal temperature, and cooling purpose is that the temperature of sheet material is reduced, and eliminates the plate internal stress; Prevent the plank distortion, cooling back cutting edge, book size is 1220mmx2440mm; The plate face specification of standard, stacking carried out sanding in 48 hours, step (3)-(5) can with prior art in that stalk is processed the method for middle-high density plate is the same.
A kind of manufacturing approach of straw fiber board with embodiment 1, replaces with cornstalk with the wheat straw bar.
Among the embodiment, the performance test of straw fiber board is following:
| Sample | Density (kg/cm 3） | Internal bond strength/MPa | MOR/MPa | Elastic modelling quantity/MPa | The plate face is held screw power/N |
| Embodiment 1 | 950 | 0.60 | 40 | 3000 | 1600 |
| Embodiment 2 | 880 | 0.58 | 30 | 2800 | 1650 |
| |
920 | 0.50 | 25 | 2500 | 1500 |
| Embodiment 4 | 900 | 0.55 | 35 | 2600 | 1580 |
Embodiment 4
A kind of manufacturing approach of straw fiber board with embodiment 1, replaces with grass stalk with the wheat straw bar.
Claims (8)
1. the manufacturing approach of a straw fiber board is characterized in that its step is following:
(1) stalk is cut into the section of 5-15mm, remove broken leaf, silt impurity, remove de-iron through magnetic drum again;
(2) stalk is imported water filling in the plastics lining board liquid spheres grinding machine, add hydrofluoric acid, grinding back pH is 5-6, wash to pH be 6-7, centrifugation then;
(3) fibre is separated in the defibrator process in defibrator of stalk piece, obtained stalk fibre;
(4) stalk fibre is sent to the glue system applying glue, dry then;
(5) stalk fibre is mated formation with the air-flowing type spreading machine after, use hot press hot pressing, straw fiber board is processed in the edging sanding.
2. according to the manufacturing approach of the said straw fiber board of claim 1, it is characterized in that: in the said step (2) stalk is imported water filling in the plastics lining board liquid spheres grinding machine, add hydrofluoric acid; Grinding back pH is 5-6; Add sulfuric acid again, stirring after washing is 6-7 to pH, centrifugation then.
3. according to the manufacturing approach of the said straw fiber board of claim 2, it is characterized in that: said step is sent to the glue system applying glue with stalk fibre in (4), and the mass ratio of adhesive and stalk is 1:8-12; Said adhesive is water-soluble phenolic resin adhesive or cyanurotriamide modified urea resin glue.
4. according to the manufacturing approach of the said straw fiber board of claim 3, it is characterized in that: the hot pressing temperature of hot press is 170-190 ℃ in the said step (5), and the time is 18-25s/mm, and the surface pressure of hot pressing is 2.0-4.0MPa.
5. like claim 1 or 2 or 3 or 4 described plastics lining board liquid spheres grinding machines; Comprise revolving power mechanism, bearing shell and feed bin; Feed bin is provided with charging aperture and discharging opening; Be provided with mill ball in the feed bin, it is characterized in that: be lined with the wear-resistant plastic layer in charging aperture and discharging opening and the feed bin, said mill ball skin is the wear-resistant plastic layer.
6. plastics lining board liquid spheres grinding machine according to claim 5 is characterized in that: said wear-resistant plastic layer is PTFE anti-wear plastic layer or ultrahigh molecular weight polyethylene abrasion-proof plastic layer.
7. plastics lining board liquid spheres grinding machine according to claim 5 is characterized in that: the diameter of said mill ball is 3-8cm.
8. plastics lining board liquid spheres grinding machine according to claim 5 is characterized in that: the thickness of said wear-resistant plastic layer is 1-2 cm.
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| CN201110326622XA CN102431071A (en) | 2011-10-25 | 2011-10-25 | Straw fiber board manufacturing method and liquid ball mill with plastic lining boards |
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| CN201110326622XA CN102431071A (en) | 2011-10-25 | 2011-10-25 | Straw fiber board manufacturing method and liquid ball mill with plastic lining boards |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107955326A (en) * | 2017-10-19 | 2018-04-24 | 周夕和 | A kind of lightweight non-metallic ball grinding machine lining board |
| CN110586283A (en) * | 2019-10-12 | 2019-12-20 | 曾彩霞 | Gunny pulp biological fiber blasting crushing centrifuge |
| CN112517602A (en) * | 2020-11-12 | 2021-03-19 | 北京工业大学 | Pretreatment method for recycling neodymium iron boron waste with adhesive tape oil sludge |
| CN113601657A (en) * | 2021-07-02 | 2021-11-05 | 福建省永安林业(集团)股份有限公司 | Drying system for fiber gum dipping, sizing and additive synthesis |
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2011
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107955326A (en) * | 2017-10-19 | 2018-04-24 | 周夕和 | A kind of lightweight non-metallic ball grinding machine lining board |
| CN110586283A (en) * | 2019-10-12 | 2019-12-20 | 曾彩霞 | Gunny pulp biological fiber blasting crushing centrifuge |
| CN112517602A (en) * | 2020-11-12 | 2021-03-19 | 北京工业大学 | Pretreatment method for recycling neodymium iron boron waste with adhesive tape oil sludge |
| CN113601657A (en) * | 2021-07-02 | 2021-11-05 | 福建省永安林业(集团)股份有限公司 | Drying system for fiber gum dipping, sizing and additive synthesis |
| CN113601657B (en) * | 2021-07-02 | 2023-06-27 | 福建省永安林业(集团)股份有限公司 | Drying system for fiber gum dipping sizing and additive synthesis |
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Application publication date: 20120502 |