CN105397897A - Production method for antiflaming wood manmade carbonized wood - Google Patents
Production method for antiflaming wood manmade carbonized wood Download PDFInfo
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- CN105397897A CN105397897A CN201510810299.1A CN201510810299A CN105397897A CN 105397897 A CN105397897 A CN 105397897A CN 201510810299 A CN201510810299 A CN 201510810299A CN 105397897 A CN105397897 A CN 105397897A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/002—Manufacture of substantially flat articles, e.g. boards, from particles or fibres characterised by the type of binder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
- B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
- B27M1/06—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching by burning or charring, e.g. cutting with hot wire
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N1/00—Pretreatment of moulding material
- B27N1/02—Mixing the material with binding agent
- B27N1/029—Feeding; Proportioning; Controlling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/02—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from particles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/10—Moulding of mats
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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
- C08L97/00—Compositions of lignin-containing materials
- C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse
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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
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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Abstract
The invention discloses a production method for antiflaming wood manmade carbonized wood. The production method comprises the four steps of raw material treatment, hot pressing molding, carbonizing treatment and surface treatment. According to matching stirring in raw material treatment, a mixture is evenly stirred under the heating state to obtain a blank with the water containing rate ranging from 8 % to 12%, wherein the mixture is formed by pure fine pine powder, a sodium silicate solution, a silica solution, nano zinc oxide powder, sodium lignin sulfonate, talcum powder and sodium montmorillonite with the ratio being 6-8 to 1-3 to 0.2-0.6 to 0.2-0.4 to 0.04-0.08 to 0.01-0.03 to 0.01-0.03, the stirring speed ranges from 240 r/min to 260 r/min, and the stirring time ranges from 20 min to 30 min. The manmade carbonized wood has the beneficial effects of achieving the antiflaming performance and being good in waterproof performance and environment-friendly, is suitable for multiple fields and is particularly suitable for the working environment where the wood is in contact with water for a long time.
Description
Technical field
The present invention relates to a kind of fire-retardant wooden man-made carbonized wood production method, belong to wood materials manufacturing technology field.
Background technology
Timber is a kind of anisotropic porous material, not only has the characteristics such as sound insulation, heat insulation, good springiness and the ratio of strength to weight be large, but also has good sense of touch and visual effect.Therefore, timber is usually used as acoustic material, building structural materials and woodwork.Improve significantly with people's living standard along with economic construction develops fast, the demand of people to timber is growing.Although timber is a kind of renewable resource, the speed of confession is far smaller than the speed needed, and the contradiction day that thus result between timber supply-demand is becoming tight.In order to alleviate this nervous situation of timber, people have employed wood-based plate measure.
Wood-based plate, to refer to timber or other non-wood plants as raw material, is separated into after various unit material, applies or do not apply the sheet material of adhesive and other additives gummed through certain machining.Because the production of wood-based plate not only can make full use of the discarded object produced in timber mechanical processing process; as broken in wood shavings, leftover bits and wood etc.; but also other non-wood plants can be made full use of; as agricultural crop straw etc.; therefore; wood-based plate makes the utilization rate of timber resources be greatly improved, and effectively can also save the forest reserves, protection of the environment, cost-saving simultaneously.
At present existing a large amount of public technology reports with timber is the Wood-based Panel Production method of raw material, as patent of invention CN101337360A discloses one " regeneration artificial board ", it is mainly with timber waste (wood shavings, sawmilling, wood broken) and manufacture four limit clamping plate waste materials of clamping plate factory and logistics packaging discarded object for raw material, becomes the strip fitting strip of unified specification, adds resin cement and suppress under high temperature weight and form through artificial.This regeneration artificial board production method improves wood comprehensive utilization rate, decreases Forest resources dynamics simultaneously.That studies wood-based plate along with people gos deep into, the research that other non-wood plants (as agricultural crop straw) are raw material also little by little attracts the concern of research worker, as patent of invention CN101544010B discloses one " a kind of production method of the cotton stalk artifical board and the cotton stalk artifical board thereof ", its mainly with cotton stalk core and cotton hide fiber for raw material, with carbimide or Lauxite for adhesive, produce cotton stalk chipboard and cotton stalk fiber plate.This Wood-based Panel Production method not only eliminates during existing the cotton stalk artifical board is produced directly to be pulverized by cotton stalk makes raw material, the group of rising existed in process of production, the defect such as on fire, but also solve that general wood-based plate intensity is low, regain large and the problem such as fiber quality is not high.
Although wood-based plate improves wood comprehensive utilization rate, decrease Forest resources dynamics, and the timber nervous situation that supply falls short of demand can be alleviated well, but it in use can discharge the formaldehyde of a certain amount of contaminated environment, and this can hinder the development of industry of artificial boards undoubtedly.Simultaneously along with the transformation of consumption of resident idea and the enhancing of environmental consciousness, this has impelled wood-based plate research worker to solve such technical problem virtually.Carbonized wood carrying out charing process containing applying high temperature under any chemical agent condition to timber, making wood surface have dark-brown aesthetic, and have effect that is anticorrosion and antibiont invasion and attack, is a kind of method for modifying wood of environmental protection.Therefore, wood-based plate research worker solves the technical problem of wood-based plate release formaldehyde by man-made board technology and carbonized wood technology are combined.Patent of invention CN102039623A discloses one " a kind of production method of glue-free man-made carbonized wood ", although the man-made carbonized wood that the method is produced has the good and environmental protection feature of antiseptic insect-repelling performance, but because its fire resistance is not improved, this limits its scope of application to a great extent.Moreover its water resistance is not also improved, be difficult to the working environment being applicable to contact with water for a long time.Therefore develop a kind of fire resistance, water resistance is good, and the fire-retardant wooden man-made carbonized wood of environmental protection is very important.
Summary of the invention
For the technical problem of man-made carbonized wood fire resistance, water resistance difference in above-mentioned prior art, technical problem to be solved by this invention proposes a kind of fire resistance, water resistance well, and the fire-retardant wooden man-made carbonized wood production method of environmental protection.
The present invention for the taked technical scheme that solves the problem is:
A kind of fire-retardant wooden man-made carbonized wood production method, its step is as follows:
1, Feedstock treating
A) processing is pulverized: pine discarded object (wood shavings, sawmilling, wood broken etc.) is become the thick pine powder of 30 ~ 40 object with pulverizer roughing, then pulverizes with trickle pulverizer, obtain the fine wood powder of 180 ~ 200 object;
B) centrifugal filtration: stir state under, fine wood powder is dissolved in sodium chloride solution, after fine wood powder fully dissolves, then mixture is carried out centrifugal, filter, dry, repeat 3 times, obtain the fine wood powder of pure rate >=95%;
C) proportioning stirs: according to weight part ratio be: pure fine wood powder: sodium silicate solution: Ludox: nanometer Zinc oxide powder: sodium lignin sulfonate: talcum powder: the mixture that na montmorillonite=6 ~ 8:1 ~ 3:0.2 ~ 0.6:0.2 ~ 0.4:0.04 ~ 0.08:0.01 ~ 0.03:0.01 ~ 0.03 forms stirs under the state of heating, with obtain moisture content 8 ~ 12% blank, mixing speed is 240 ~ 260r/min, and mixing time is 20 ~ 30min.
Preferably, the order number of described fine wood powder is 190 orders; Described weight part ratio is pure fine wood powder: sodium silicate solution: Ludox: nanometer Zinc oxide powder: sodium lignin sulfonate: talcum powder: na montmorillonite=7:2:0.4:0.3:0.06:0.02:0.02.
The SiO of described Ludox
2content is 30 ~ 50%, and particle size range is 20 ~ 80nm; Described sodium metasilicate modulus is 2.2 ~ 2.6; Described nanometer Zinc oxide powder particle size range is 1 ~ 100nm; Described talcum powder, na montmorillonite order number are 200 ~ 300 orders.
Preferably, the SiO of described Ludox
2content is 40%, and particle size range is 30 ~ 70nm; Described sodium metasilicate modulus is 2.4, and described nanometer Zinc oxide powder particle size range is 20 ~ 80nm; Described talcum powder, na montmorillonite order number are 250 orders.
2, hot-forming
The blank handled well through step 1 is inserted heated mould in default forming die and be pressed into briquet.Forming pressure scope is 4 ~ 8MPa, and forming temperature scope is 140 ~ 150 DEG C, temperature retention time 20 ~ 70min; During manufacture, on steam injected hot press, the temperature of lower platen is higher than the vapor (steam) temperature pre-set, and this is the condensation in order to prevent steam.
3, charing process
A) warm-up phase: the briquet handled well through step 2 is put into carbonization device, and with the temperature being raised to 70 ~ 80 DEG C in 10 ~ 12h, drying and preheating are carried out to it;
B) temperature rise period: first temperature in carbonization device is warmed up to 90 ~ 100 DEG C with the speed of 10 ~ 12 DEG C/h, and is incubated 0.1 ~ 0.3h; Then be warmed up to 124 ~ 134 DEG C with the speed of 2 ~ 4 DEG C/h, and be incubated 0.1 ~ 0.3h, make the moisture content of briquet inside be 0; The speed of last 10 ~ 12 DEG C/h is warmed up to 205 ~ 210 DEG C, and is incubated 0.3 ~ 0.5h, adopts batch (-type) spraying steam method to spray into steam as protective gas in this temperature rise period;
C) temperature-fall period: adopt the cooling of batch (-type) spraying steam method, first cool to 124 ~ 134 DEG C with the speed of 9 ~ 11 DEG C/h, and be incubated 0.1 ~ 0.3h; Then cool to 90 ~ 100 DEG C with the speed of 2 ~ 4 DEG C/h, and be incubated 0.1 ~ 0.3h, use the steam of identical temperature to carry out damping moisture regain process to briquet, process 2 ~ 6h, adjusts back 4 ~ 7% by the moisture content of briquet simultaneously; Finally, Temperature fall, to room temperature, takes out briquet.
4, surface treatment
A) preparatory stage: briquet step 3 handled well carries out surface cleaning and drying;
B) processing stage: by brushing through in aluminum sulfate and after rare methane-siliconic acid sodium solution surface treatment is carried out to briquet, overcoating brush of laying equal stress on is to certain thickness (briquet termination brushes thick point a little), and maintenance 3 days or more.
Beneficial effect of the present invention is embodied in following several respects:
1, sodium metasilicate has the advantages that cohesive force is strong, intensity is higher, heat resistance is good, plays the effect of binding agent in the fabrication process.It is hot-forming that it not only contributes to pine powder, and in the gap that pine powder can be infiltrated and hole, when carbonization temperature, sodium metasilicate can generate Silica hydrogel blocking capillary porosity duct, improve the density of man-made carbonized wood, mechanical strength, water resistance and fire resistance, thus improve the weatherability of man-made carbonized wood.
2, the viscosity of Ludox is lower, and length of penetration is larger than sodium metasilicate, can play well dispersion and osmosis when therefore mixing with pine powder; When the temperature increases, the moisture evaporation in Ludox, colloidal particle is attached to pine powder surface securely, be combined with each other and forms silica network structure, further improve the density of man-made carbonized wood, mechanical strength, fire resistance and water resistance between particle.
3, nano zine oxide can with pine powder component generation cooperative effect, simultaneously can also absorb ultraviolet, therefore, it can improve density, mechanical strength, the anti-wear performance of man-made carbonized wood, bactericidal property and ageing-resistant ability; And sodium lignin sulfonate is as surfactant, then can reduce the surface energy of pine powder, make pine powder surface become hydrophobicity by hydrophily, thus improve the water resistance of man-made carbonized wood.
4, talcously to add, the stability of the uniformly dispersed of man-made carbonized wood granularity and shape can be increased, thus reduce its distortion and cracking; Talcum powder also has good fire resistance simultaneously, effectively can improve the fire resistance of man-made carbonized wood.Na montmorillonite has the characteristics such as good water, heat rejection, and can give the performances such as the structure of man-made carbonized wood uniqueness, intensity, corrosion resistant, wear-resisting, fire-retardant and dimensionally stable.
5, adopt stepped continuous heating and cooling method, decrease the temperature difference that man-made carbonized wood inside produces, thus the defect such as warpage, drum, layering that minimizing thermal stress causes; Decrease the defect such as distortion, cracking that moisture gradient difference causes simultaneously, thus obtain the man-made carbonized wood of more good quality.
6, due to chemical composition content, chemical constitution and cyto-architectural difference can be there is between different wood material, therefore, the present invention adopts single wood materials as raw material, overcomes that the associativity that different wood material brings is bad, poor morphology, the defect such as of low quality.
Man-made carbonized wood disclosed in this invention has fire resistance, water resistance is good, and the feature of environmental protection, be applicable to multiple fields, be particularly useful for the working environment contacted with water for a long time.Therefore, it is a kind of wood materials with applications well prospect.
Detailed description of the invention
Embodiment 1
A kind of fire-retardant wooden man-made carbonized wood production method, its step is as follows:
1, choose: the SiO of Ludox
2content is 40%, and particle size range is 30 ~ 70nm; Sodium metasilicate modulus is 2.4; Nanometer Zinc oxide powder particle size range is 20 ~ 80nm; Talcum powder, na montmorillonite order number are 250 orders.
2, Feedstock treating
A) processing is pulverized: pine discarded object (wood shavings, sawmilling, wood broken etc.) is become the thick pine powder of 35 object with pulverizer roughing, then pulverizes with trickle pulverizer, obtain the fine wood powder of 190 object;
B) centrifugal filtration: stir state under, fine wood powder is dissolved in sodium chloride solution, after fine wood powder fully dissolves, then mixture is carried out centrifugal, filter, dry, repeat 3 times, obtain the fine wood powder of pure rate 95%;
C) proportioning stirs: according to weight part ratio be: pure fine wood powder: sodium silicate solution: Ludox: nanometer Zinc oxide powder: sodium lignin sulfonate: talcum powder: the mixture of na montmorillonite=7:2:0.4:0.3:0.06:0.02:0.02 composition stirs under the state of heating, with obtain moisture content 10% blank, mixing speed is 250r/min, and mixing time is 25min.
3, hot-forming
The blank handled well through step 2 is inserted heated mould in default forming die and be pressed into briquet.Forming pressure scope is 6MPa, and forming temperature scope is 145 DEG C, temperature retention time 45min.
4, charing process
A) warm-up phase: the briquet handled well through step 3 is put into carbonization device, and with the temperature being raised to 75 DEG C in 11h, drying and preheating are carried out to it;
B) temperature rise period: first temperature in carbonization device is warmed up to 95 DEG C with the speed of 11 DEG C/h, and is incubated 0.2h; Then be warmed up to 129 DEG C with the speed of 3 DEG C/h, and be incubated 0.2h, make the moisture content of briquet inside be 0; The speed of last 11 DEG C/h is warmed up to 208 DEG C, and is incubated 0.4h, adopts batch (-type) spraying steam method to spray into steam as protective gas in this temperature rise period;
C) temperature-fall period: adopt the cooling of batch (-type) spraying steam method, first cool to 129 DEG C with the speed of 10 DEG C/h, and be incubated 0.2h; Then cool to 95 DEG C with the speed of 3 DEG C/h, and be incubated 0.2h, use the steam of identical temperature to carry out damping moisture regain process to briquet, process 4h, adjusts back 6% by the moisture content of briquet simultaneously; Finally, Temperature fall, to room temperature, takes out briquet.
5, surface treatment
A) preparatory stage: briquet step 4 handled well carries out surface cleaning and drying;
B) processing stage: by brushing through in aluminum sulfate and after rare methane-siliconic acid sodium solution surface treatment is carried out to briquet, overcoating brush of laying equal stress on is to 2mm thickness, and maintenance 3 days.
Embodiment 2
A kind of fire-retardant wooden man-made carbonized wood production method, its step is as follows:
1, choose: the SiO of Ludox
2content is 30%, and particle size range is 20 ~ 80nm; Sodium metasilicate modulus is 2.2; Nanometer Zinc oxide powder particle size range is 1 ~ 100nm; Talcum powder, na montmorillonite order number are 200 orders.
2, Feedstock treating
A) processing is pulverized: pine discarded object (wood shavings, sawmilling, wood broken etc.) is become the thick pine powder of 30 object with pulverizer roughing, then pulverizes with trickle pulverizer, obtain the fine wood powder of 180 object;
B) centrifugal filtration: stir state under, fine wood powder is dissolved in sodium chloride solution, after fine wood powder fully dissolves, then mixture is carried out centrifugal, filter, dry, repeat 3 times, obtain the fine wood powder of pure rate 95.1%;
C) proportioning stirs: according to weight part ratio be: pure fine wood powder: sodium silicate solution: Ludox: nanometer Zinc oxide powder: sodium lignin sulfonate: talcum powder: the mixture of na montmorillonite=6:1:0.2:0.2:0.04:0.01:0.01 composition stirs under the state of heating, with obtain moisture content 8% blank, mixing speed is 240r/min, and mixing time is 20min.
3, hot-forming
The blank handled well through step 2 is inserted heated mould in default forming die and be pressed into briquet.Forming pressure scope is 4MPa, and forming temperature scope is 140 DEG C, temperature retention time 20min.
4, charing process
A) warm-up phase: the briquet handled well through step 3 is put into carbonization device, and with the temperature being raised to 70 DEG C in 10h, drying and preheating are carried out to it;
B) temperature rise period: first temperature in carbonization device is warmed up to 90 DEG C with the speed of 10 DEG C/h, and is incubated 0.1h; Then be warmed up to 124 DEG C with the speed of 2 DEG C/h, and be incubated 0.1h, make the moisture content of briquet inside be 0; The speed of last 10 DEG C/h is warmed up to 205 DEG C, and is incubated 0.3h, adopts batch (-type) spraying steam method to spray into steam as protective gas in this temperature rise period;
C) temperature-fall period: adopt the cooling of batch (-type) spraying steam method, first cool to 124 DEG C with the speed of 9 DEG C/h, and be incubated 0.1h; Then cool to 90 DEG C with the speed of 2 DEG C/h, and be incubated 0.1h, use the steam of identical temperature to carry out damping moisture regain process to briquet, process 2h, adjusts back 4% by the moisture content of briquet simultaneously; Finally, Temperature fall, to room temperature, takes out briquet.
5, surface treatment
A) preparatory stage: briquet step 4 handled well carries out surface cleaning and drying;
B) processing stage: by brushing through in aluminum sulfate and after rare methane-siliconic acid sodium solution surface treatment is carried out to briquet, overcoating brush of laying equal stress on is to 2mm thickness, and maintenance 3 days.
Embodiment 3
A kind of fire-retardant wooden man-made carbonized wood production method, its step is as follows:
1, choose: the SiO of Ludox
2content is 50%, and particle size range is 25 ~ 75nm; Sodium metasilicate modulus is 2.6; Nanometer Zinc oxide powder particle size range is 10 ~ 90nm; Talcum powder, na montmorillonite order number are 300 orders.
2, Feedstock treating
A) processing is pulverized: pine discarded object (wood shavings, sawmilling, wood broken etc.) is become the thick pine powder of 40 object with pulverizer roughing, then pulverizes with trickle pulverizer, obtain the fine wood powder of 200 object;
B) centrifugal filtration: stir state under, fine wood powder is dissolved in sodium chloride solution, after fine wood powder fully dissolves, then mixture is carried out centrifugal, filter, dry, repeat 3 times, obtain the fine wood powder of pure rate 95.3%;
C) proportioning stirs: according to weight part ratio be: pure fine wood powder: sodium silicate solution: Ludox: nanometer Zinc oxide powder: sodium lignin sulfonate: talcum powder: the mixture of na montmorillonite=8:3:0.6:0.4:0.08:0.03:0.03 composition stirs under the state of heating, with obtain moisture content 12% blank, mixing speed is 260r/min, and mixing time is 30min.
3, hot-forming
The blank handled well through step 2 is inserted heated mould in default forming die and be pressed into briquet.Forming pressure scope is 8MPa, and forming temperature scope is 150 DEG C, temperature retention time 70min.
4, charing process
A) warm-up phase: the briquet handled well through step 3 is put into carbonization device, and with the temperature being raised to 80 DEG C in 12h, drying and preheating are carried out to it;
B) temperature rise period: first temperature in carbonization device is warmed up to 100 DEG C with the speed of 12 DEG C/h, and is incubated 0.3h; Then be warmed up to 134 DEG C with the speed of 4 DEG C/h, and be incubated 0.3h, make the moisture content of briquet inside be 0; The speed of last 12 DEG C/h is warmed up to 210 DEG C, and is incubated 0.5h, adopts batch (-type) spraying steam method to spray into steam as protective gas in this temperature rise period;
C) temperature-fall period: adopt the cooling of batch (-type) spraying steam method, first cool to 134 DEG C with the speed of 11 DEG C/h, and be incubated 0.3h; Then cool to 100 DEG C with the speed of 4 DEG C/h, and be incubated 0.3h, use the steam of identical temperature to carry out damping moisture regain process to briquet, process 6h, adjusts back 7% by the moisture content of briquet simultaneously; Finally, Temperature fall, to room temperature, takes out briquet.
5, surface treatment
A) preparatory stage: briquet step 4 handled well carries out surface cleaning and drying;
B) processing stage: by brushing through in aluminum sulfate and after rare methane-siliconic acid sodium solution surface treatment is carried out to briquet, overcoating brush of laying equal stress on is to 2mm thickness, and maintenance 3 days.
The testing partial performances result of the man-made carbonized wood that table 1 is made for embodiment 1 ~ 3.
Table 1
| Test event | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Mass loss rate (%) | 2.36±0.12 | 2.33±0.16 | 2.39±0.19 |
| Air-dry density (g/cm 3) | 0.725±0.017 | 0.719±0.013 | 0.726±0.015 |
| Equilibrium moisture content (%) | 6.11±0.12 | 6.07±0.17 | 6.14±0.19 |
| Oxygen index (OI) (%) | 48 | 45 | 51 |
| Colour brilliance value | 47 | 45 | 49 |
| Insect protected performance | Well | Well | Well |
| Water resistance | Well | Well | Well |
| Corrosion resistant performance | By force | By force | By force |
Certainly, just the preferred embodiments of the disclosure is described in detail above, not limits practical range of the present invention with this, and all equivalence changes done according to principle of the present invention, structure and structure, all should be covered by protection scope of the present invention.
Claims (1)
1. a fire-retardant wooden man-made carbonized wood production method, is characterized in that: its step is as follows:
1), Feedstock treating
A) processing is pulverized: pine discarded object (wood shavings, sawmilling, wood broken etc.) is become the thick pine powder of 30 ~ 40 object with pulverizer roughing, then pulverizes with trickle pulverizer, obtain the fine wood powder of 180 ~ 200 object;
B) centrifugal filtration: stir state under, fine wood powder is dissolved in sodium chloride solution, after fine wood powder fully dissolves, then mixture is carried out centrifugal, filter, dry, repeat 3 times, obtain the fine wood powder of pure rate >=95%;
C) proportioning stirs: according to weight part ratio be: pure fine wood powder: sodium silicate solution: Ludox: nanometer Zinc oxide powder: sodium lignin sulfonate: talcum powder: the mixture that na montmorillonite=6 ~ 8:1 ~ 3:0.2 ~ 0.6:0.2 ~ 0.4:0.04 ~ 0.08:0.01 ~ 0.03:0.01 ~ 0.03 forms stirs under the state of heating, with obtain moisture content 8 ~ 12% blank, mixing speed is 240 ~ 260r/min, and mixing time is 20 ~ 30min.
2), hot-forming
The blank handled well through step 1 is inserted heated mould in default forming die and be pressed into briquet.Forming pressure scope is 4 ~ 8MPa, and forming temperature scope is 140 ~ 150 DEG C, temperature retention time 20 ~ 70min.
3), charing process
A) warm-up phase: the briquet handled well through step 2 is put into carbonization device, and with the temperature being raised to 70 ~ 80 DEG C in 10 ~ 12h, drying and preheating are carried out to it;
B) temperature rise period: first temperature in carbonization device is warmed up to 90 ~ 100 DEG C with the speed of 10 ~ 12 DEG C/h, and is incubated 0.1 ~ 0.3h; Then be warmed up to 124 ~ 134 DEG C with the speed of 2 ~ 4 DEG C/h, and be incubated 0.1 ~ 0.3h, make the moisture content of briquet inside be 0; The speed of last 10 ~ 12 DEG C/h is warmed up to 205 ~ 210 DEG C, and is incubated 0.3 ~ 0.5h, adopts batch (-type) spraying steam method to spray into steam as protective gas in this temperature rise period;
C) temperature-fall period: adopt the cooling of batch (-type) spraying steam method, first cool to 124 ~ 134 DEG C with the speed of 9 ~ 11 DEG C/h, and be incubated 0.1 ~ 0.3h; Then cool to 90 ~ 100 DEG C with the speed of 2 ~ 4 DEG C/h, and be incubated 0.1 ~ 0.3h, use the steam of identical temperature to carry out damping moisture regain process to briquet, process 2 ~ 6h, adjusts back 4 ~ 7% by the moisture content of briquet simultaneously; Finally, Temperature fall, to room temperature, takes out briquet.
4), surface treatment
A) preparatory stage: briquet step 3 handled well carries out surface cleaning and drying;
B) processing stage: by brushing through in aluminum sulfate and after rare methane-siliconic acid sodium solution surface treatment is carried out to briquet.
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