CN104179054A - Method for producing medium-density fiberboard through branches and trunk of ricinus communis and stalks of miscanthus - Google Patents
Method for producing medium-density fiberboard through branches and trunk of ricinus communis and stalks of miscanthus Download PDFInfo
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- CN104179054A CN104179054A CN201410392343.7A CN201410392343A CN104179054A CN 104179054 A CN104179054 A CN 104179054A CN 201410392343 A CN201410392343 A CN 201410392343A CN 104179054 A CN104179054 A CN 104179054A
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Abstract
The invention provides a method for producing a medium-density fiberboard through branches and trunk of ricinus communis and stalks of miscanthus. The method comprises the following steps: 1, after the branches and trunk of ricinus communis and stalks of miscanthus are mixed, cutting the mixture into pieces; 2, humidifying and preheating the pieces, and performing fiber separation through a defibrator; 3, applying urea resin, an ammonium chloride curing agent and a paraffin waterproofing agent after fiber mixing, and uniformly mixing; 4, drying the fiber mixture; 5, screening the dried fibers, and manufacturing the fiber rough board through hot pressing of a hot press; 6, cooling the rough board, cutting edges and sanding, so as to obtain the finished product medium-density fiberboard. The medium-density fiberboard manufactured through the method provided by the invention is smooth in surface, uniform in fiber texture, moderate in density, good in dimensional stability, good in machining performance, high in bonding strength, static bending strength and plane tensile strength, good in elastic modulus, strong in bolt holding force, and low in moisture absorption and water absorption performance. According to the method, the branches and trunk of ricinus communis and stalks of miscanthus are used to produce the fiberboard, that branches and trunk of ricinus communis are cut down in successive years for updating is achieved and the forest fire caused by stalks of miscanthus is eliminated, and the method is suitable for areas, where ricinus communis and miscanthus grow.
Description
Technical field
The present invention relates to glued board, in particular to the bonding fiber plate of producing with castor-oil plant limb, Chinese silvergrass stem stalk.
Background technology
Well-known: castor-oil plant (
ricinus communis) belong to Euphorbiaceae, 1 year or herbaceos perennial, plant shrub or arbor shape, general high 1～4.5m.Castor-oil plant wide adaptability, easy to raise, barren-resistant, arid, saline and alkaline.Castor-oil plant is one of the world ten large oil crops, and seed oil-containing is up to 46%～56%, and castor oil is widely used in chemical industry, medicine etc.; In castor anesthesia stem and cortex, contain abundant fiber, can be used as the raw material of papermaking and artificial cotton.Chinese silvergrass (
miscanthus) be the general designation of various awns platymisciums, containing 15 to 20 species of having an appointment, belong to grass, be born in Subtropical low altitude area more, Chinese silvergrass stem stalk can be used for weaving Lu Mang straw mat, pluck that Chinese silvergrass inflorescence is made broom, leaf is made dyestuff etc., and the method for utilization is few.At present, castor-oil plant limb, Chinese silvergrass stem stalk are discarded conventionally or as plant slag, and these fibre resources are comprehensive utilization not, and arid season has again the hidden danger that causes mountain fire.
Through retrieval, the technology of useful other manufacture of materials fiberboard.But the fiberboard patent application of also not utilizing castor-oil plant limb, Chinese silvergrass stem stalk to produce for raw material.
summary of the invention
The object of this invention is to provide a kind of by castor-oil plant limb, Chinese silvergrass stem stalk the method for the production of fiberboard, castor-oil plant limb, Chinese silvergrass stem stalk resource are fully used, for producing fiberboard, open up new raw material approach.
For achieving the above object, the method that inventor provides comprises;
(1) castor-oil plant limb, Chinese silvergrass stem stalk are used respectively to drum chipper chip, in castor-oil plant limb fragment, the Chinese silvergrass stem stalk fragment ratio of 45: 55, mix, through screening machine screening, remove excessive fragment, bits end and other impurity;
(2) qualified castor-oil plant limb fragment, Chinese silvergrass stem stalk fragment compound are put into the pre-cooker of defibrator and passed into low-pressure steam humidification and preheating, then fragment is sent into the vertical digester boiling of defibrator through feed auger, after fragment is softening, with defibrator, grinds and carries out fiber separation;
(3) fiber grinding is sent into fiber drying system by continuous pulp discharge valve, before fiber is sent into drying duct; Paraffin molten is entered to defibrator by metering infusion, pollopas, curing agent are allocated in proportion with glue mixer, through metering device, spray into defibrator drainage conduit.
(4) drying system adopts high temperature gas flow dry, and wet fiber mixes with thermal medium, and wet fiber is carried in drying duct, and the moisture of wet fiber is taken away by medium because of endothermic gasification, and dried fiber is delivered to dry fiber feed bin and stores after cyclone separator separation.
(5) the screen cloth sorting with different meshes by the different dry fiber of specification, acceptable fiber is fed into the vacuum pneumatic forming machine of mating formation with pneumatic transporting, mat formation into continuous slab band, thick fiber lay down is contained in to slab sandwich layer, and fiber fines is mated formation in steel slab surface, with putting down rod, puts down slab, slab after moulding edging after precompressed, and the transversal one-tenth certain specification of the breadth of pressing heating platen, enter hot pressing process, through hot press, divide three sections of temperature hot pressing;
(6) the continuous hair plates suppressing enters cooling panel turnover device, after cooling rear length sawing, jack saw cutting, is transported to after warehouse is stored and carries out sanding; Sanding line carries out sanding surface and adjusts products thickness hair plates, and production board is packing warehouse-in after check grades.
In (1) step of said method, the moisture content of described castor-oil plant limb, Chinese silvergrass stem stalk is 35%～40%; The length of described fragment is 15～30mm.
In (2) step of said method, the low-pressure steam pressure of described humidification and preheating is 0.2～0.3MPa; Described digestion time is 3～5min, and steam pressure is at 0.6～0.8MPa, and temperature is controlled at 155 ℃～175 ℃; Moisture content when described fragment is softening is 35%～50%; Described grinding pressure is controlled at 0.6～4.2MPa.
In (3) step of said method, described ratio is: the paraffin water repellent of fiber quality 1.5%～2%, the curing agent of the pollopas of fiber quality 10%～13%, fiber quality 1%.
In (4) step of said method, described high temperature gas flow is dry is to control the inlet temperature that the baking temperature of wet fiber is medium, and one-level airflow inlet baking temperature is 130 ℃～170 ℃, and outlet temperature is 60 ℃～70 ℃; Described wet fiber and thermal medium mixed proportion are the dry fiber of every 1 ㎏: 15～30m
3air; The wet fiber floating velocity average out to 8.5m/s of described drying machine pipage control, air velocity is 22～30m/s, and the time of staying is 3.5～5s, and drought index is that fiber moisture is 6%～8%.
In (5) step of said method, the ratio that described screening requires is: more than 2mm be less than 20%, 0.12～2mm be greater than 70%, 0.125mm be less than 10%; The first paragraph temperature of described three sections of temperature hot pressing is 160 ℃～190 ℃, 180 ℃～220 ℃ of second segments, the 3rd section 150 ℃～160 ℃, the initial plate core layer temperature of pressurize section is 100 ℃, outlet temperature is 100 ℃～110 ℃, and the hot pressing time of unit thickness of slab is 11～21s/ ㎜; Described hot press is multilayer large-format hot press, and medium is deep fat.
In (6) step of said method, the specification of described cutting is 1220mm * 2440mm; Described period of storage is 3～4 days.
The fiberboard that method of the present invention utilizes castor-oil plant limb, Chinese silvergrass stem stalk to produce for raw material, has following performance; Smooth surface, fibr tissue is even, and density is moderate, good stability of the dimension, and machinability is good, and bonding strength, MOR, plane tensile strength are high, and modulus of elasticity is good, holds screw power strong, low moisture absorption, low water suction.The present invention utilizes annual a large amount of discarded castor-oil plant limb, easily causes the Chinese silvergrass stem stalk of mountain fire as the raw material of producd fibers plate; having realized (1) castor anesthesia stem cuts down to reach year after year and upgrades object, the stem stalk of containing fruit and sell as raw material; promote Increase Income of Peasant Households; (2) harvesting in autumn of Chinese silvergrass stem stalk stops to cause mountain fire with this; the protection ecological balance; increase peasant household's employment, there is raw material guarantee in (3) enterprise, obtains economic development.Be applicable to the regional utilization of resources of growing of castor-oil plant and Chinese silvergrass.
The specific embodiment
embodiment
(1) first, by moisture content be 35%～40% castor-oil plant limb, Chinese silvergrass stem stalk is whittled into 15～30mm fragment with drum chipper respectively, in castor-oil plant limb fragment, the Chinese silvergrass stem stalk fragment ratio of 45: 55, mix, through screening machine screening, remove excessive fragment, bits end and other impurity;
(2) afterwards, qualified castor-oil plant limb fragment, Chinese silvergrass stem stalk fragment compound are put into the pre-cooker of defibrator and passed into low-pressure steam humidification and preheating, the saturated vapour pressure of preheating is 0.3MPa, then fragment is sent into the vertical digester of defibrator through feed auger, with 170 ℃ of boilings, digestion time is 4min, and steam pressure is 0.7MPa,, moisture content softening until fragment grinds and carries out fiber separation with defibrator after being 35%～50%, and grinding pressure remains on 3.6～4.0MPa;
(3) fiber grinding is sent into fiber drying system by continuous pulp discharge valve, before fiber is sent into drying duct; Paraffin molten is entered to defibrator by metering infusion, by pollopas, curing agent, wait with glue mixer and allocate in proportion, allotment is than being the paraffin water repellent of fiber quality 2%, the curing agent of the pollopas of fiber quality 12%, fiber quality 1%, sprays into defibrator drainage conduit through metering device;
(4) adopt afterwards high temperature gas flow dry, the baking temperature of wet fiber is the inlet temperature of medium, and one-level airflow inlet baking temperature is 150 ℃～170 ℃, and outlet temperature is 60 ℃～70 ℃, wet fiber mixes with thermal medium, and wet fiber and thermal medium mixed proportion are the dry fiber of every 1 ㎏: 15～30m
3air, the wet fiber floating velocity average out to 8.5m/s of drying machine pipage control, air velocity is 22～30m/s, the time of staying is 4～5s, drought index is that fiber moisture is 6%～8%, and dried fiber is delivered to dry fiber feed bin and stores after cyclone separator separation;
(5) again, screen cloth sorting by the different dry fiber of specification with different meshes, the ratio that screening requires is: more than 2mm be less than 20%, 0.12～2mm is greater than 70%, 0.125mm is less than 10%, with air-flow, deliver into the vacuum pneumatic forming machine of mating formation, mat formation into continuous slab band, thick fiber lay down is contained in to slab sandwich layer, fiber fines is mated formation in steel slab surface, with putting down rod, put down slab, slab after moulding edging after precompressed, and the transversal one-tenth certain specification of the breadth of pressing heating platen, enter hot pressing process, through hot press, divide three sections of temperature hot pressing: first paragraph temperature is 160 ℃～190 ℃, 180 ℃～220 ℃ of second segments, the 3rd section 150 ℃～160 ℃, the initial plate core layer temperature of pressurize section is 100 ℃, outlet temperature is 100 ℃～110 ℃, the hot pressing time of unit thickness of slab is 11～21s/ ㎜, hot press is multilayer large-format hot press, and medium is deep fat,
(6) last, the continuous hair plates suppressing enters cooling panel turnover device, and cooling rear length sawing, jack saw cut into after 1220 ㎜ * 2440 ㎜ specifications, is transported to warehouse storage and carries out sanding after 4 days; Sanding line carries out sanding surface and adjusts products thickness tolerance hair plates, and production board is packing warehouse-in after check grades.
Claims (7)
1. the method for the production of fiberboard by castor-oil plant limb, Chinese silvergrass stem stalk, its feature comprises;
(1) castor-oil plant limb, Chinese silvergrass stem stalk are used respectively to drum chipper chip, in castor-oil plant limb fragment, the Chinese silvergrass stem stalk fragment ratio of 45: 55, mix, through screening machine screening, remove excessive fragment, bits end and other impurity;
(2) qualified castor-oil plant limb fragment, Chinese silvergrass stem stalk fragment compound are put into the pre-cooker of defibrator and passed into low-pressure steam humidification and preheating, then fragment is sent into the vertical digester boiling of defibrator through feed auger, after fragment is softening, with defibrator, grinds and carries out fiber separation;
(3) fiber grinding is sent into fiber drying system by continuous pulp discharge valve, before fiber is sent into drying duct; Paraffin molten is entered to defibrator by metering infusion, pollopas, curing agent are allocated in proportion with glue mixer, through metering device, spray into defibrator drainage conduit.
(4) drying system adopts high temperature gas flow dry, wet fiber mixes with thermal medium, wet fiber is carried in drying duct, and the moisture of wet fiber is taken away by medium because of endothermic gasification, and dried fiber is delivered to dry fiber feed bin and stores after cyclone separator separation.
(5) the screen cloth sorting with different meshes by the different dry fiber of specification, acceptable fiber is fed into the vacuum pneumatic forming machine of mating formation with pneumatic transporting, mat formation into continuous slab band, thick fiber lay down is contained in to slab sandwich layer, fiber fines is mated formation in steel slab surface, with putting down rod, put down slab, slab after moulding edging after precompressed, and press the transversal one-tenth certain specification of breadth of heating platen, enter hot pressing process, through hot press, divide three sections of temperature hot pressing, obtain hair plates;
(6) the continuous hair plates suppressing enters cooling panel turnover device, after cooling rear length sawing, jack saw cutting, is transported to after warehouse is stored and carries out sanding; Sanding line carries out sanding surface and adjusts products thickness hair plates, and middle density finished fiber plate is packing warehouse-in after check grades.
2. the method for claim 1, is characterized in that in (1) step, and the moisture content of described castor-oil plant limb, Chinese silvergrass stem stalk is 35%～40%; The length of described fragment is 15～30mm.
3. the method for claim 1, is characterized in that in (2) step, and the low-pressure steam pressure of described humidification and preheating is 0.2～0.3MPa; Described digestion time is 3～5min, and steam pressure is at 0.6～0.8MPa, and temperature is controlled at 155 ℃～175 ℃; Moisture content when described fragment is softening is 35%～50%; Described grinding pressure is controlled at 0.6～4.2MPa.
4. the method for claim 1, is characterized in that, in (3) step, described ratio is: the paraffin water repellent of fiber quality 1.5%～2%, the curing agent of the pollopas of fiber quality 10%～13%, fiber quality 1%.
5. the method for claim 1, it is characterized in that in (4) step, described high temperature gas flow is dry is to control the inlet temperature that the baking temperature of wet fiber is medium, and one-level airflow inlet baking temperature is 130 ℃～170 ℃, and outlet temperature is 60 ℃～70 ℃; Described wet fiber and thermal medium mixed proportion are the dry fiber of every 1 ㎏: 15～30m
3air; The wet fiber floating velocity average out to 8.5m/s of described drying machine pipage control, air velocity is 22～30m/s, and the time of staying is 3.5～5s, and drought index is that fiber moisture is 6%～8%.
6. the method for claim 1, is characterized in that in (5) step, and the ratio that described screening requires is: more than 2mm be less than 20%, 0.12～2mm be greater than 70%, 0.125mm be less than 10%; The first paragraph temperature of described three sections of temperature hot pressing is 160 ℃～190 ℃, 180 ℃～220 ℃ of second segments, the 3rd section 150 ℃～160 ℃, the initial plate core layer temperature of pressurize section is 100 ℃, outlet temperature is 100 ℃～110 ℃, and the hot pressing time of unit thickness of slab is 11～21s/ ㎜; Described hot press is multilayer large-format hot press, and medium is deep fat.
7. the method for claim 1, is characterized in that in (6) step, and the specification of described cutting is 1220mm * 2440mm; Described period of storage is 3～4 days.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410392343.7A CN104179054B (en) | 2014-08-11 | 2014-08-11 | By castor-oil plant limb, Chinese silvergrass stem stalk for the production of the method for medium density fibre board (MDF) |
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| CN201410392343.7A CN104179054B (en) | 2014-08-11 | 2014-08-11 | By castor-oil plant limb, Chinese silvergrass stem stalk for the production of the method for medium density fibre board (MDF) |
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| CN104179054B CN104179054B (en) | 2016-04-06 |
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Cited By (4)
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| CN105666632A (en) * | 2016-01-25 | 2016-06-15 | 新沂市大自然木业有限公司 | Manufacturing method for environment-friendly corrosion prevention medium-density fiberboard for door plate of security door |
| CN105690538A (en) * | 2016-01-25 | 2016-06-22 | 新沂市大自然木业有限公司 | Manufacturing method for environment-friendly inflaming retarding medium density fiberboard for laminate wood flooring |
| CN106493823A (en) * | 2016-11-15 | 2017-03-15 | 苍南宇诺新材料科技有限公司 | Modern fibre plate processing method |
| CN109624015A (en) * | 2018-12-29 | 2019-04-16 | 上海昶法新材料有限公司 | A kind of environment-friendly type density board and preparation method thereof of papermaking waste production |
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| CN105666632A (en) * | 2016-01-25 | 2016-06-15 | 新沂市大自然木业有限公司 | Manufacturing method for environment-friendly corrosion prevention medium-density fiberboard for door plate of security door |
| CN105690538A (en) * | 2016-01-25 | 2016-06-22 | 新沂市大自然木业有限公司 | Manufacturing method for environment-friendly inflaming retarding medium density fiberboard for laminate wood flooring |
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| CN109624015A (en) * | 2018-12-29 | 2019-04-16 | 上海昶法新材料有限公司 | A kind of environment-friendly type density board and preparation method thereof of papermaking waste production |
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