CN112359636A - Preparation method of grey paperboard - Google Patents
Preparation method of grey paperboard Download PDFInfo
- Publication number
- CN112359636A CN112359636A CN202011203585.9A CN202011203585A CN112359636A CN 112359636 A CN112359636 A CN 112359636A CN 202011203585 A CN202011203585 A CN 202011203585A CN 112359636 A CN112359636 A CN 112359636A
- Authority
- CN
- China
- Prior art keywords
- pulp
- paper
- core
- pulping
- mechanical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011087 paperboard Substances 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000000123 paper Substances 0.000 claims abstract description 77
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 58
- 239000010893 paper waste Substances 0.000 claims abstract description 39
- 238000004537 pulping Methods 0.000 claims abstract description 38
- 239000011094 fiberboard Substances 0.000 claims abstract description 35
- 239000002344 surface layer Substances 0.000 claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 claims abstract description 19
- 239000012792 core layer Substances 0.000 claims abstract description 17
- 238000012545 processing Methods 0.000 claims abstract description 17
- 239000002699 waste material Substances 0.000 claims abstract description 17
- 235000013312 flour Nutrition 0.000 claims abstract description 14
- 238000009826 distribution Methods 0.000 claims abstract description 12
- 239000002002 slurry Substances 0.000 claims abstract description 9
- 239000010410 layer Substances 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 238000013329 compounding Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 37
- 239000007788 liquid Substances 0.000 claims description 27
- 238000005406 washing Methods 0.000 claims description 17
- 239000000835 fiber Substances 0.000 claims description 15
- 238000005086 pumping Methods 0.000 claims description 12
- 238000010009 beating Methods 0.000 claims description 9
- 239000012535 impurity Substances 0.000 claims description 9
- 238000012216 screening Methods 0.000 claims description 9
- 238000005507 spraying Methods 0.000 claims description 9
- 230000008719 thickening Effects 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 6
- 230000018044 dehydration Effects 0.000 claims description 6
- 238000006297 dehydration reaction Methods 0.000 claims description 6
- 238000010790 dilution Methods 0.000 claims description 6
- 239000012895 dilution Substances 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000003490 calendering Methods 0.000 claims description 2
- 239000011111 cardboard Substances 0.000 claims 1
- 239000000203 mixture Substances 0.000 abstract 1
- 239000002994 raw material Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/14—Secondary fibres
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/08—Mechanical or thermomechanical pulp
Landscapes
- Paper (AREA)
Abstract
The invention relates to the technical field of papermaking, and discloses a preparation method of a gray paperboard, which comprises the following steps: pulping: pulping the wood pulp of the fiberboard: disintegrating the fiberboard waste into first mechanical pulp; core pulp pulping: shredding the waste paper into a second mechanical pulp; pulping the flour paste: feeding the waste paper into a high-concentration pulper for pulping and processing into third mechanical paper pulp; slurry preparation: core slurry preparation: mixing the first mechanical paper pulp and the second mechanical paper pulp according to the mass ratio of 0.3:1, processing the mixture into core pulp, and forming a grey board paper core layer by the core layer pulp distribution net of a paper machine head box; preparing flour paste: processing the third mechanical paper pulp into surface pulp, and forming an upper surface layer of the grey board paper and a lower surface layer of the grey board paper by the surface pulp through an upper layer pulp distribution net and a lower layer pulp distribution net of a pulp flow box of the paper machine; manufacturing paper: compounding the upper surface layer of the grey board paper, the core layer of the grey board paper and the lower surface layer of the grey board paper to form wet paper sheets, and papermaking by a paper machine to form finished paper; the invention can improve the bulk of the grey board and reduce the cost without greatly adjusting the original production process.
Description
Technical Field
The invention relates to the technical field of papermaking, in particular to a preparation method of a gray paperboard.
Background
In recent years, with the rapid development of economy in China, the circulation of various commodities is more and more, and the demand for papermaking products keeps increasing by two digits every year. The gray paperboard is an industrial thick paperboard which is used as a base material for making products such as book covers, gift boxes, wine, cosmetic product and other commodity packaging boxes in the packaging and printing industries.
The production of the grey board paper needs a large amount of secondary fibers, so that the price of the waste paper is continuously increased, and a large amount of waste paper is recycled even for four or five times, so that the quality of the waste paper is reduced. The biggest problem is that the thickness index of the paperboard is poor, and the common method of the paper mill is to increase the basis weight of the paperboard to achieve the desired thickness and related indexes, so that the consumption of fiber raw materials is increased, and the production cost is increased.
Disclosure of Invention
The invention aims to provide a method for preparing a gray paperboard, which can improve the bulk of the gray paperboard and reduce the cost without greatly adjusting the original production process.
In order to achieve the above object, the present invention provides a method for preparing a gray paperboard, comprising the steps of:
step 1, pulping:
1.1, pulping the wood pulp of the fiberboard: classifying the fiber board waste, sending the fiber board waste into a pulper according to a grade proportion, adding white water to disperse and disintegrate, wherein the mass ratio of the white water to the fiber board is 3.5-3.8: 1, heating the fiber board waste to 100 ℃ by steam, and the concentration of the wood pulp of the disintegrated fiber board is 3.2-4%; washing and dehydrating the disintegrated fiberboard wood pulp by an inclined screen type solid-liquid separator, separating impurities by the fiber separator, screening by a fine screen, concentrating by a pulp inclined screen type solid-liquid separator, pulping by a pulping machine, thickening the pulp, and processing into first mechanical paper pulp;
1.2, core pulp pulping, namely classifying the waste paper, sending the waste paper into a pulper according to a grade proportion, adding white water for dispersing and disintegrating, wherein the mass ratio of the white water to the waste paper is 3.5-3.8: 1, and the concentration of the core pulp after disintegrating is 3.2% -4%; washing and dehydrating the core pulp by an inclined screen type solid-liquid separator, separating impurities by a fiber separator, fine screening, concentrating by a pulp inclined screen type solid-liquid separator, pulping by a pulping machine, thickening the finished pulp, and processing into second mechanical paper pulp;
1.3, pulping the flour pulp, namely classifying the waste paper, sending the waste paper into a high-concentration pulper according to a grade proportion, adding white water to perform high-concentration pulping for 60 minutes, wherein the mass ratio of the white water to the waste paper is (1.2-1.3): 1, and the concentration of the crushed flour pulp is 8.0-12%; washing and dehydrating the flour pulp by an inclined screen type solid-liquid separator, separating impurities by a fiber separator, fine screening, concentrating the pulp by the inclined screen type solid-liquid separator, pulping by a pulping machine, thickening the finished pulp, and processing into third mechanical paper pulp;
step 2, slurry preparation:
2.1, preparing core slurry: pumping the first mechanical paper pulp obtained in the step 1.1 and the second mechanical paper pulp obtained in the step 1.2 to a core pulp mixing tank according to the mass ratio of 0.3:1 for mixing pulp, and processing the pulp into core pulp; the core pulp after being prepared is pumped to a core pulp front pool, and after the concentration is stabilized by a concentration regulator, thick white water is pumped to the core pulp front pool for core pulp dilution; spraying the diluted core pulp to a core layer pulp distribution net of a pulp flow box of the paper machine through a fan pump to form a gray board paper core layer;
2.2, preparing the flour paste: pumping the third mechanical paper pulp in the step 1.3 to a surface pulp proportioning pool to be processed into surface pulp; pumping the surface pulp to a surface pulp pre-papermaking pool, and pumping concentrated white water to the surface pulp pre-papermaking pool for surface pulp dilution after the concentration is stabilized by a concentration regulator; spraying the diluted surface pulp to the upper layer pulp distribution net of a pulp box of the paper machine through a fan pump to form an upper layer of the gray board paper; spraying surface pulp to the lower surface layer pulp distribution net of a pulp box of the paper machine through a fan pump to form a lower surface layer of the gray board paper;
and (3) compounding the upper surface layer of the grey board paper, the core layer of the grey board paper and the lower surface layer of the grey board paper in the step (2) to form a wet paper sheet, and papermaking to form finished paper after the wet paper sheet is subjected to net part dehydration, pressing part squeezing dehydration, drying part drying, surface finishing of a calendaring part, cooling of a cooling part, reeling of a paper reeling part and slitting of a slitting part.
In a preferred embodiment of the present invention, the first mechanical pulp treated in step 1.1 has a beating degree of 8 ° SR to 10 ° SR and a consistency of 3.5%.
In a preferred embodiment of the present invention, the second mechanical pulp treated in step 1.2 has a beating degree of 28 ° SR to 30 ° SR and a consistency of 3.5%.
In a preferred embodiment of the present invention, the third mechanical pulp after the treatment in step 1.3 has a beating degree of 32 ° SR to 35 ° SR and a consistency of 3.5%.
As a preferred embodiment of the present invention, the dryness of the wet sheet after dewatering in the wire section in step 3 is greater than or equal to 25%.
In a preferred embodiment of the present invention, the dryness of the wet paper sheet after press dewatering in the pressing section in step 3 is 50% or more.
In a preferred embodiment of the present invention, the dryness of the paper treated in step 3 is 92% to 93%.
As a preferable scheme of the invention, in the step 1.1, white water generated by washing and dewatering the fiberboard wood pulp by the inclined screen type solid-liquid separator is recycled to the crusher to crush the fiberboard waste.
As a preferable scheme of the invention, in step 1.2, white water generated by washing and dewatering the core pulp by the inclined screen type solid-liquid separator is recycled to the crusher to crush the waste paper.
In step 1.3, the white water produced by washing and dewatering the waste paper by the inclined screen type solid-liquid separator is recycled to the crusher to crush the waste paper.
Compared with the prior art, the preparation method of the gray paperboard provided by the embodiment of the invention has the beneficial effects that:
the gray board paper core layer in the embodiment of the invention is prepared and formed by first mechanical paper pulp prepared by processing fiber board waste and second mechanical paper pulp prepared by waste paper, so that the overall bulk of the gray board paper can be effectively increased by 11-12%, and meanwhile, the first mechanical paper pulp prepared by processing fiber board waste can replace 30-40% of waste paper in the raw material of the conventional gray board paper core layer, so that the raw material cost is reduced; meanwhile, the upper surface layer and the lower surface layer of the grey board paper are both made of third mechanical paper pulp made of waste paper, so that the flatness and smoothness of the surface and the bottom surface of the grey board paper are ensured; therefore, on the premise of not influencing the performance of the gray board, the invention effectively improves the bulk of the gray board, does not need to greatly adjust the production flow of the original gray board, and has simple preparation operation.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.
FIG. 1 is a flow chart of a method of making a gray paperboard provided in accordance with the present invention;
FIG. 2 is a schematic structural view of a gray board;
in the figure, 1 is an upper layer of the gray board paper; 2 is a gray paperboard core layer; and 3, a lower surface layer of the grey board paper.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, which are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.
As shown in fig. 1 and 2, a method for preparing a gray paperboard according to a preferred embodiment of the present invention includes the steps of:
step 1, pulping:
1.1, pulping the wood pulp of the fiberboard: classifying the fiber board waste, sending the fiber board waste into a pulper according to a grade proportion, adding white water to disperse and disintegrate, wherein the mass ratio of the white water to the fiber board is 3.5-3.8: 1, heating the fiber board waste to 100 ℃ by steam, and the concentration of the wood pulp of the disintegrated fiber board is 3.2-4%; washing and dehydrating the disintegrated fiberboard wood pulp by an inclined screen type solid-liquid separator, separating impurities by the fiber separator, screening by a fine screen, concentrating by a pulp inclined screen type solid-liquid separator, pulping by a pulping machine, thickening the pulp, and processing into first mechanical paper pulp; in the embodiment, the waste fiberboard is leftover fiberboard of an environment-friendly material wood appliance factory, and at present, the price of waste paper in the market is 5 times of that of the leftover fiberboard, so that the cost of raw materials can be effectively reduced;
1.2, core pulp pulping, namely classifying the waste paper, sending the waste paper into a pulper according to a grade proportion, adding white water for dispersing and disintegrating, wherein the mass ratio of the white water to the waste paper is 3.5-3.8: 1, and the concentration of the core pulp after disintegrating is 3.2% -4%; washing and dehydrating the core pulp by an inclined screen type solid-liquid separator, separating impurities by a fiber separator, fine screening, concentrating by a pulp inclined screen type solid-liquid separator, pulping by a pulping machine, thickening the finished pulp, and processing into second mechanical paper pulp;
1.3, pulping the flour pulp, namely classifying the waste paper, sending the waste paper into a high-concentration pulper according to a grade proportion, adding white water to perform high-concentration pulping for 60 minutes, wherein the mass ratio of the white water to the waste paper is (1.2-1.3): 1, and the concentration of the crushed flour pulp is 8.0-12%; washing and dehydrating the flour pulp by an inclined screen type solid-liquid separator, separating impurities by a fiber separator, fine screening, concentrating the pulp by the inclined screen type solid-liquid separator, pulping by a pulping machine, thickening the finished pulp, and processing into third mechanical paper pulp;
wherein, the step 1.1, the step 1.2 and the step 1.3 are not in sequence;
step 2, slurry preparation:
2.1, preparing core slurry: pumping the first mechanical paper pulp obtained in the step 1.1 and the second mechanical paper pulp obtained in the step 1.2 to a core pulp mixing tank according to the mass ratio of 0.3:1 for mixing pulp, and processing the pulp into core pulp; the core pulp after being prepared is pumped to a core pulp front pool, and after the concentration is stabilized by a concentration regulator, thick white water is pumped to the core pulp front pool for core pulp dilution; spraying the diluted core pulp to a core layer pulp distribution net of a pulp flow box of the paper machine through a fan pump to form a gray board paper core layer 2;
2.2, preparing the flour paste: pumping the third mechanical paper pulp in the step 1.3 to a surface pulp proportioning pool to be processed into surface pulp; pumping the surface pulp to a surface pulp pre-papermaking pool, and pumping concentrated white water to the surface pulp pre-papermaking pool for surface pulp dilution after the concentration is stabilized by a concentration regulator; spraying the diluted surface pulp to an upper layer pulp distribution net of a pulp box of a paper machine through a fan pump to form an upper surface layer 1 of the gray board paper; spraying surface pulp to the lower surface layer pulp distribution net of a pulp box of the paper machine through a fan pump to form a lower surface layer 3 of the gray board paper;
and (3) compounding the upper surface layer 1, the core layer 2 and the lower surface layer 3 of the grey board paper in the step (2) to form a wet paper sheet, and making the wet paper sheet into paper after the wet paper sheet is subjected to net part dehydration, pressing part squeezing dehydration, drying part drying, surface finishing of a polishing part, cooling of a cooling part, reeling of a paper reeling part and slitting part slitting. Wherein, the white water refers to waste water discharged from a wire part of a paper machine during papermaking, and contains fine short fibers and other substances added into paper pulp; the concentrated white water is waste water with high fiber content discharged from a wire table roller part of a paper machine during papermaking.
Because the gray board paper core layer 2 in the embodiment of the invention is prepared and formed by the first mechanical paper pulp processed by the fiber board waste and the second mechanical paper pulp made of waste paper, the overall bulk of the gray board paper can be effectively improved by 11% -12%, and meanwhile, the first mechanical paper pulp processed by the fiber board waste can replace 30% -40% of waste paper in the raw material of the conventional gray board paper core layer 2, so that the raw material cost is reduced; meanwhile, the upper surface layer 1 and the lower surface layer 3 of the grey board paper are both made of third mechanical paper pulp made of waste paper, so that the flatness and smoothness of the surface and the bottom surface of the grey board paper are ensured; therefore, on the premise of not influencing the performance of the gray board, the invention effectively improves the bulk of the gray board, does not need to greatly adjust the production flow of the original gray board, and has simple preparation operation.
Illustratively, the beating degree of the first mechanical paper pulp treated in the step 1.1 reaches 8-10 ° SR, the concentration reaches 3.5%, the fiber length of the first mechanical paper pulp is prevented from being too short, and the dewatering speed of the wet paper sheet in the subsequent step at the wire part can be improved; the beating degree of the second mechanical paper pulp treated in the step 1.2 reaches 28-30 DEG SR, and the concentration reaches 3.5%; the beating degree of the third mechanical paper pulp treated in the step 1.3 reaches 32-35 DEG SR, the concentration reaches 3.5%, and the flatness and smoothness of the surface and the bottom surface of the grey board paper are further improved; furthermore, the consistency of the first mechanical pulp, the second mechanical pulp and the third mechanical pulp is set to be the same, so that the consistency fluctuation can be reduced, and the quantitative amount of the produced paper is more stable.
Illustratively, the dryness of the wet sheet after dewatering in the wire section in step 3 is greater than or equal to 25%; the dryness of the wet paper sheet after being pressed and dewatered by the pressing part in the step 3 is more than or equal to 50 percent; the dryness of the finished paper treated in the step 3 is more than or equal to 92-93 percent, and the quality of the finished paper is improved.
Exemplarily, in step 1.1, white water generated by washing and dewatering of fiberboard wood pulp by an inclined screen type solid-liquid separator is recycled to a crusher to crush the fiberboard waste; in step 1.2, white water generated by washing and dehydrating the core pulp by an inclined screen type solid-liquid separator is recycled to a crusher to crush waste paper; in the step 1.3, white water generated by washing and dewatering the waste paper by the inclined screen type solid-liquid separator is recycled to the crusher to crush the waste paper, so that fibers in the white water can be recycled, and water pollution caused by direct discharge of the white water is avoided.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. The preparation method of the grey board is characterized by comprising the following steps:
step 1, pulping:
1.1, pulping the wood pulp of the fiberboard: classifying the fiber board waste, sending the fiber board waste into a pulper according to a grade proportion, adding white water to disperse and disintegrate, wherein the mass ratio of the white water to the fiber board is (3.5-3.8): 1, heating to 100 ℃ by steam, and the concentration of the wood pulp of the disintegrated fiber board is 3.2-4%; washing and dehydrating the disintegrated fiberboard wood pulp by an inclined screen type solid-liquid separator, separating impurities by the fiber separator, screening by a fine screen, concentrating by a pulp inclined screen type solid-liquid separator, pulping by a pulping machine, thickening the pulp, and processing into first mechanical paper pulp;
1.2, core pulp pulping, namely classifying the waste paper, sending the waste paper into a pulper according to a grade proportion, adding white water for dispersing and disintegrating, wherein the mass ratio of the white water to the waste paper is (3.5-3.8): 1, and the concentration of the disintegrated core pulp is 3.2% -4%; washing and dehydrating the core pulp by an inclined screen type solid-liquid separator, separating impurities by a fiber separator, fine screening, concentrating by a pulp inclined screen type solid-liquid separator, pulping by a pulping machine, thickening the finished pulp, and processing into second mechanical paper pulp;
1.3, pulping the flour pulp, namely classifying the waste paper, sending the waste paper into a high-concentration pulper according to a grade proportion, adding white water to perform high-concentration pulping for 60 minutes, wherein the mass ratio of the white water to the waste paper is (1.2-1.3): 1, and the concentration of the crushed flour pulp is 8.0-12%; washing and dehydrating the flour pulp by an inclined screen type solid-liquid separator, separating impurities by a fiber separator, fine screening, concentrating the pulp by the inclined screen type solid-liquid separator, pulping by a pulping machine, thickening the finished pulp, and processing into third mechanical paper pulp;
step 2, slurry preparation:
2.1, preparing core slurry: pumping the first mechanical paper pulp obtained in the step 1.1 and the second mechanical paper pulp obtained in the step 1.2 to a core pulp mixing tank according to the mass ratio of 0.3:1 for mixing pulp, and processing the pulp into core pulp; the core pulp after being prepared is pumped to a core pulp front pool, and after the concentration is stabilized by a concentration regulator, thick white water is pumped to the core pulp front pool for core pulp dilution; spraying the diluted core pulp to a core layer pulp distribution net of a pulp flow box of the paper machine through a fan pump to form a gray board paper core layer;
2.2, preparing the flour paste: pumping the third mechanical paper pulp in the step 1.3 to a surface pulp proportioning pool to be processed into surface pulp; pumping the surface pulp to a surface pulp pre-papermaking pool, and pumping concentrated white water to the surface pulp pre-papermaking pool for surface pulp dilution after the concentration is stabilized by a concentration regulator; spraying the diluted surface pulp to the upper layer pulp distribution net of a pulp box of the paper machine through a fan pump to form an upper layer of the gray board paper; spraying surface pulp to the lower surface layer pulp distribution net of a pulp box of the paper machine through a fan pump to form a lower surface layer of the gray board paper;
step 3, manufacturing paper:
and (3) compounding the upper surface layer of the grey board paper, the core layer of the grey board paper and the lower surface layer of the grey board paper in the step (2) to form a wet paper sheet, and papermaking to form finished paper after the wet paper sheet is subjected to net part dehydration, pressing part squeezing dehydration, drying part drying, surface finishing of a calendaring part, cooling of a cooling part, reeling of a paper reeling part and slitting of a slitting part.
2. The method of making a gray paperboard of claim 1 wherein the first mechanical pulp after the treatment of step 1.1 has a degree of beating of from 8 ° SR to 10 ° SR and a consistency of 3.5%.
3. The method of making a gray paperboard of claim 1 wherein the second mechanical pulp after the treatment of step 1.2 has a degree of beating of from 28 ° SR to 30 ° SR and a consistency of 3.5%.
4. The method of making a gray paperboard of claim 1 wherein the degree of beating of the third mechanical pulp after the treatment of step 1.3 is between 32 ° SR and 35 ° SR and the consistency is 3.5%.
5. The method of making gray paperboard of claim 1 wherein the wet sheet dewatered on the wire section in step 3 has a dryness of greater than or equal to 25%.
6. The method of making a gray paperboard of claim 1 wherein the wet sheet after press dewatering in step 3 has a dryness of greater than or equal to 50%.
7. The method of making grey board according to claim 1, wherein the dryness of the finished paper after treatment in step 3 is 92% to 93%.
8. The method of making gray paperboard of claim 1 wherein in step 1.1, the white water produced by washing and dewatering fiberboard pulp in a cross-screen solid-liquid separator is recycled to a crusher to disintegrate the fiberboard waste.
9. The method of making gray paperboard of claim 1, wherein in step 1.2, the core slurry is washed and dewatered by a cross-screen solid-liquid separator to produce white water which is recycled to the crusher to crush waste paper.
10. The method for preparing gray cardboard of claim 1, wherein in step 1.3, white water generated by washing and dewatering waste paper by a inclined screen type solid-liquid separator is recycled to a crusher to crush the waste paper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011203585.9A CN112359636A (en) | 2020-11-02 | 2020-11-02 | Preparation method of grey paperboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011203585.9A CN112359636A (en) | 2020-11-02 | 2020-11-02 | Preparation method of grey paperboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112359636A true CN112359636A (en) | 2021-02-12 |
Family
ID=74512623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011203585.9A Pending CN112359636A (en) | 2020-11-02 | 2020-11-02 | Preparation method of grey paperboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112359636A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114134760A (en) * | 2021-11-22 | 2022-03-04 | 四川金田纸业有限公司 | Production method of smooth grey board |
| CN114990922A (en) * | 2022-05-30 | 2022-09-02 | 浙江金励环保纸业有限公司 | High-strength bamboo fiber gray paperboard and production process thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102677498A (en) * | 2012-05-24 | 2012-09-19 | 中国林业科学研究院林产化学工业研究所 | Method for producing corrugated base paper pulp by utilizing scrap materials of fibre board |
| CN103061199A (en) * | 2012-12-17 | 2013-04-24 | 华南理工大学 | Device and method for utilizing medium density fiberboard leftover material to produce boxboard |
| CN104047203A (en) * | 2014-06-24 | 2014-09-17 | 马鞍山纽泽科技服务有限公司 | Technology for producing grey boards |
-
2020
- 2020-11-02 CN CN202011203585.9A patent/CN112359636A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102677498A (en) * | 2012-05-24 | 2012-09-19 | 中国林业科学研究院林产化学工业研究所 | Method for producing corrugated base paper pulp by utilizing scrap materials of fibre board |
| CN103061199A (en) * | 2012-12-17 | 2013-04-24 | 华南理工大学 | Device and method for utilizing medium density fiberboard leftover material to produce boxboard |
| CN104047203A (en) * | 2014-06-24 | 2014-09-17 | 马鞍山纽泽科技服务有限公司 | Technology for producing grey boards |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114134760A (en) * | 2021-11-22 | 2022-03-04 | 四川金田纸业有限公司 | Production method of smooth grey board |
| CN114134760B (en) * | 2021-11-22 | 2023-08-15 | 四川金田纸业有限公司 | Production method of smooth gray paperboard |
| CN114990922A (en) * | 2022-05-30 | 2022-09-02 | 浙江金励环保纸业有限公司 | High-strength bamboo fiber gray paperboard and production process thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102677532B (en) | Process for preparing cultural paper by utilizing full-recovered pulp | |
| CN110080031B (en) | Production process of special core paper for compounding high-grade gray board paper | |
| CN109056406A (en) | High-grade T cardboard and its production method | |
| CN112359636A (en) | Preparation method of grey paperboard | |
| CN107740305B (en) | Method for preparing high-strength corrugated base paper from straws | |
| CN112878089B (en) | Preparation method of high-breaking-resistance kraft paper | |
| CN100424260C (en) | Mechanical cold method for making paper pulp | |
| CN109837799A (en) | A kind of preparation method improving low grammes per square metre T cardboard ring crush intensity | |
| CN114481659B (en) | High-strength craft paper and production process thereof | |
| CN114293392A (en) | Production process of high-strength environment-friendly fine dried noodle cardboard paper | |
| CN111663370B (en) | High-strength gray paperboard and preparation method thereof | |
| CN113106774A (en) | Deinking recycling method applied to office waste paper | |
| CN101660282B (en) | Method for preparing all cotton stalk cellulose by adopting mechanical-active oxygen method | |
| CN110939013B (en) | Method for manufacturing high-bulk gray board paper | |
| CN109750554A (en) | A kind of corrugated paper preparation process and equipment | |
| CN107604741B (en) | A method of preparing environmentally friendly brown paper using old newsprint | |
| CN115094662A (en) | Craft paper and preparation method thereof | |
| CN216663636U (en) | High-breaking-resistance multilayer kraft cardboard paper | |
| CN111691235B (en) | Gray board paper and preparation method thereof | |
| CN112981998B (en) | Wood chip pretreatment method for grey board production and pulping method | |
| CN105696394A (en) | Environment-friendly pulping method for producing kraft cardboard paper for fine dried noodles | |
| CN111691221A (en) | Rice straw papermaking method | |
| CN101691713A (en) | Papermaking process flow for recycling waste newspaper and magazines | |
| CN112962345A (en) | Corrugated base paper production process with wood flour fiber adding step and corrugated base paper | |
| CN112431050B (en) | Method for producing semi-chemical pulp in large scale by utilizing forest waste |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210212 |
|
| RJ01 | Rejection of invention patent application after publication |