CN112144318B - Method for manufacturing overlong mica paper - Google Patents
Method for manufacturing overlong mica paper Download PDFInfo
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- CN112144318B CN112144318B CN202011012444.9A CN202011012444A CN112144318B CN 112144318 B CN112144318 B CN 112144318B CN 202011012444 A CN202011012444 A CN 202011012444A CN 112144318 B CN112144318 B CN 112144318B
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- 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
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
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- 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
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- 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
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/36—Inorganic fibres or flakes
- D21H13/38—Inorganic fibres or flakes siliceous
- D21H13/44—Flakes, e.g. mica, vermiculite
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
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Abstract
The invention provides a method for manufacturing super-long mica paper, which comprises the steps of selecting mica materials, screening the mica materials, calcining, stewing and dehydrating the mica materials, proportioning the mica materials according to the content of 20 meshes of 10%, 20 meshes of 40 meshes of 25%, 40 meshes of 60 meshes of 30%, 60 meshes of 80 meshes of 25% and 80 meshes of 10% to obtain mica pulp, and finally manufacturing the mica paper by papermaking. The mica paper produced by the method has the product length increased from 800 meters to 2000 meters and the mechanical strength increased from 3-4N/cm before 2 Improved to 7N/cm 2 The compressive strength is improved to 45Kv/mm from the previous 30Kv/mm, the temperature resistance is improved to 900 ℃ from 800 ℃, the penetration time is improved to 40S from 30S, and the air permeability is improved to 2000S/M 3 Increased to 3500S/M 3， The tensile strength is higher, the production process flow is simple, the mica utilization rate is greatly improved, the mica has no corrosion to equipment, and the mica has no pollution to water and surrounding environment.
Description
Technical Field
The invention relates to the technical field of mica insulation material production, in particular to a method for manufacturing overlong mica paper.
Background
Mica has complete chemical inertness and non-inflammability, and most importantly, the mica has the characteristics of high voltage resistance, corona resistance and radiation resistance, and has the characteristics of no toxicity, no odor, aging resistance, corrosion resistance and the like.
The mica paper is made of mica mineral material, and has the advantages of good performance of natural mica, uniform thickness, small fluctuation range of dielectric strength, high and stable corona initial voltage, and good heat conductivity.
The methods for producing mica paper in the prior art mainly comprise two methods: one is a mechanical pulping method, the technological process is to select materials, wash materials, separate and pulp the slurry by waterpower, screen and dehydrate, concentrate by cyclone classification, mix the slurry and make, the mica paper produced is known as the dry mica paper; the other is a chemical pulping method, and the production process flow comprises the steps of calcining, burning out crystal water, removing impurities, acid leaching, hydraulic stripping pulping, screening and dewatering, cyclone grading concentration, pulp preparation and papermaking, and the produced mica paper is generally called as cooked powder mica paper.
The raw mica paper produced by the first mechanical pulping method has low electrical strength, low tensile strength and low air permeability; although the air permeability and pressure resistance of the mica paper produced by the second chemical pulping method are improved, the process flow is complex, the working procedures are complicated, the mica utilization rate is reduced, part of the mica material soaked by acid is not soaked and cannot be completely utilized, particularly, the acid-soaked mica master batch is easy to corrode equipment, and serious pollution is caused to water and the surrounding environment.
The raw mica paper produced by the first mechanical pulping method and the cooked mica paper produced by the second chemical pulping method have the following common defects: the length of the mica paper is not enough, the mica paper with the length of more than 800 meters is broken, and the mica paper is continuously stopped for lapping when producing the mica tape, so that the product quality is influenced, and the production efficiency is reduced; the penetration time of the mica paper is short and is not more than 3S; the air permeability of the mica paper is small and is generally not more than 2000S/MM 3 。
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a method for manufacturing overlong mica paper.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
(1) selecting mica materials: removing sand, slurry and impurities in the cloud master batch by adopting a manual sorting and water washing method, manually sorting the sand and the impurities, and washing the slurry in the cloud master batch by using a charging basket;
(2) screening mica materials: dividing the mica material into small materials and large materials of 800-850 mm and 850-900 mm according to the diameter of the photo, and calcining the small materials and the large materials for different time lengths;
(3) calcining a mica material: calcining the mica material according to the classification of small materials and large materials, burning out crystal water by 10-12 kg per furnace to obtain mica clinker, and further removing sand stones and soil in the mica material;
(4) and (3) cooking the mica material: the calcined mica material is cooked, so that the mica material fully absorbs water, the mica material after absorbing water sinks in a crushing part of a pulping machine, and under the action of high-pressure jet water, the mica material rotates at a high speed in the pulping machine to generate collision and friction, and the mica material is peeled along the inside of the pulping machine to prepare mica pulp sheets;
(6) screening and dewatering: feeding the crushed mica into a screening dehydrator, classifying and storing according to the granularity of less than 20 meshes, 20-40 meshes, 40-60 meshes, 60-80 meshes and more than 80 meshes, and further removing impurities in the slurry;
(7) the concentration ratio is as follows: the mica slurry is prepared according to the content of 20 meshes 10%, 20 meshes to 40 meshes 25%, 40 meshes to 60 meshes 30%, 60 meshes to 80 meshes 25% and 80 meshes 10%, and the electrostatic effect and the tensile strength among mica paper can be enhanced through the scientific proportion;
(8) making mica paper: and adding water into the proportioned mica masterbatch to dilute into slurry with the mass concentration of 5-6% for papermaking.
Preferably, in the step (3), the calcination temperature of the mica masterbatch is 750-850 ℃, wherein the calcination of small materials is 30 minutes, and the calcination of large materials is 50 minutes, the size classification calcination can save energy, and not only crystal water can be removed through calcination, but also impurities can be further removed.
Preferably, in the step (4), the cooking temperature of the mica masterbatch is 90-100 ℃, the cooking pressure is 0.15-0.25 MPa, the cooking time is 30-60 minutes, and the mica material fully absorbs water through cooking, so that the mica masterbatch is convenient to sink to the bottom of the crusher.
Preferably, in the step (5), the cooked mica material is fed into a pulping machine from a feeding cylinder, the mica material after water absorption sinks in a crushing part of the pulping machine, under the action of high-pressure jet water with the pressure of 6.5Mpa, the mica material rotates at high speed in the pulping machine to generate collision and friction, the mica material is peeled along the inside of the pulp, mica pulp sheets are prepared, and the water consumption for one ton of the mica material is 18-20M 3 。
Preferably, the cloud master batch in the step (7) is prepared according to the content of 20 meshes 10%, 20 meshes to 40 meshes 25%, 40 meshes to 60 meshes 30%, 60 meshes to 80 meshes 25% and 80 meshes 10%.
The mica paper produced by the method has the product length increased from 800 meters to 2000 meters and the mechanical strength increased from 3-4N/cm before 2 Improved to 7N/cm 2 The compressive strength is improved from 30Kv/mm to 45Kv/mm, the temperature resistance is improved from 800 ℃ to 900 ℃, the penetration time is improved from 30S to 40S, and the air permeability is improved from 2000S/M 3 Increased to 3500S/M 3， The tensile strength is higher, the production process flow is simple, the mica utilization rate is greatly improved, the mica has no corrosion to equipment, and the mica has no pollution to water and surrounding environment.
Detailed Description
The present invention relates to a method for producing an ultra-long mica paper, and the technical scheme of the present invention will be further described by the following examples.
Example 1:
firstly, finely selecting the cloud master batch: removing sand, slurry and impurities in the cloud master batch by adopting a manual sorting and water washing method, manually sorting the sand and the impurities, and washing the slurry in the cloud master batch by using a charging basket; screening after selecting mica materials: dividing the mica material into small materials and large materials of 800-850 mm and 850-900 mm according to the diameter of the photo; calcining the screened mica material: calcining the mica material according to classification of 12 kg of small materials per furnace and 10 kg of large materials per furnace, wherein the calcining temperature of the mica material is 750 ℃, the small materials are calcined for 30 minutes, and the large materials are calcined for 50 minutes to obtain mica clinker; cooking the calcined mica clinker at 90 ℃ under 0.15MPa for 30 minutes; conveying the cooked mica material to a pulping machine through a conveying belt, sinking the cooked mica material which fully absorbs water to the bottom of the pulping machine, rotating the mica material in the pulping machine at a high speed under the action of high-pressure jet water of 6.5Mpa to generate collision and friction, and stripping the mica material along the inside of the pulp to prepare mica pulp sheets; dewatering by sieving: classifying and storing the mica pulp sheets according to the granularity of less than 20 meshes, 40 meshes, 60 meshes and more than 80 meshes, and further removing impurities in the pulp; the concentration ratio is as follows: mixing the mica slurry according to the content of 10 percent below 20 meshes, 25 percent below 20 meshes, 30 percent below 40 meshes, 25 percent above 60 meshes and 10 percent above 80 meshes to obtain mica slurry; and adding water into the proportioned cloud master batch to dilute into slurry with the mass concentration of 5% for papermaking.
Example 2:
firstly, finely selecting the cloud master batch: removing sand, slurry and impurities in the cloud master batch by adopting a manual sorting and water washing method, manually sorting the sand and the impurities, and washing the slurry in the cloud master batch by using a charging basket; screening after selecting mica materials: dividing the mica material into small materials and large materials of 800-850 mm and 850-900 mm according to the diameter of the photo; calcining the screened mica material: calcining the screened mica material: calcining the mica material according to 12 kg of small materials per furnace and 10 kg of large materials per furnace, wherein the calcining temperature of the mica material is 850 ℃, the small materials are calcined for 50 minutes, and the large materials are calcined for 70 minutes to obtain mica clinker; the mica material cooking temperature is 100 ℃, the cooking pressure is 0.25MPa, and the cooking time is 60 minutes; conveying the mica material after water absorption into a pulping machine through a conveying belt, sinking the mica material which is fully absorbed with water after cooking to the bottom of the pulping machine, rotating the mica material in the pulping machine at a high speed under the action of high-pressure jet water of 6.5Mpa to generate collision and friction, and stripping the mica material along the inside of the pulp to prepare mica pulp sheets; dewatering by sieving: the mica pulp sheets are classified and stored according to the granularity of more than 20 meshes, 40 meshes, 60 meshes, 80 meshes and 80 meshes, and impurities in the pulp are further removed; the concentration ratio is as follows: mixing the mica slurry with the content of 20 meshes of 10%, 40 meshes of 25%, 60 meshes of 30%, 80 meshes of 25% and more than 80 meshes of 10% to obtain mica slurry; and diluting the proportioned cloud master batch with water into slurry with the mass concentration of 6% for papermaking.
Example 3:
firstly, finely selecting the cloud master batch: removing sand stones, slurry and impurities in the cloud master batch by adopting a manual sorting and water washing method, removing the sand stones and the impurities by manual sorting, and removing the slurry in the cloud master batch by washing a charging basket; screening after selecting mica materials: dividing the mica material into small materials and large materials of 800-850 mm and 850-900 mm according to the diameter of the photo, and calcining the small materials and the large materials for different time lengths; calcining the screened mica material: calcining the mica material according to classification of 12 kg of small materials per furnace and 10 kg of large materials per furnace, and burning out crystal water to obtain mica clinker; cooking the calcined mica clinker at 95 ℃ under 0.2MPa for 45 minutes; conveying the mica material after water absorption into a pulping machine through a conveying belt, sinking the mica material after fully absorbing water after cooking at the bottom of the pulping machine, rotating the mica material in the pulping machine at a high speed under the action of high-pressure jet water of 6.5Mpa to generate collision and friction, and stripping the mica material along the inside of the pulp to prepare a mica pulp sheet; dewatering by sieving: the mica pulp sheets are classified and stored according to the particle sizes of 10 meshes, 30 meshes, 50 meshes, 70 meshes and 100 meshes, and impurities in the pulp are further removed; the concentration ratio is as follows: mixing 10 mesh 10%, 30 mesh 30%, 20 mesh 25%, 70 mesh 25%, 100 mesh 10% to obtain mica slurry; and diluting the proportioned cloud master batch with water into slurry with the mass concentration of 5.5% for papermaking.
Claims (3)
1. A method for manufacturing overlong mica paper is characterized in that: the manufacturing method comprises the following steps:
(1) selecting a mica material: removing sand, soil and impurities in the cloud master batch;
(2) screening mica materials: dividing the mica material into small materials and large materials of 800-850 mm and 850-900 mm according to the diameter of the photo;
(3) calcining a mica material: calcining the mica material according to the classification of small materials and large materials, and burning out crystal water, wherein the calcining temperature of the mica material is 750-850 ℃, the small materials are calcined for 30-50 minutes, and the large materials are calcined for 50-70 minutes;
(4) cooking a mica material: cooking the calcined mica material to ensure that the mica material fully absorbs water, wherein the cooking temperature of the mica material is 90-100 ℃, the cooking pressure is 0.15-0.25 MPa, and the cooking time is 30-60 minutes;
(5) crushing a mica material: crushing the mica material by adopting water with the pressure of 6.5 MPa;
(6) screening and dewatering: feeding the crushed mica into a screening dehydrator, classifying and storing according to the granularity of below 20 meshes, 20-40 meshes, 40-60 meshes, 60-80 meshes and above 80 meshes, and further removing impurities in the slurry;
(7) the concentration ratio is as follows: preparing mica slurry according to the content of 10 percent below 20 meshes, 25 percent between 20 and 40 meshes, 30 percent between 40 and 60 meshes, 25 percent between 60 and 80 meshes and 10 percent above 80 meshes;
(8) making mica paper: and adding water into the proportioned mica masterbatch to dilute into slurry with the mass concentration of 5-6% for papermaking.
2. According toThe method for producing an ultralong mica paper according to claim 1, characterized in that: putting the cooked mica material into a pulping machine from a feeding cylinder in the step (5), sinking the mica material after absorbing water into a crushing part of the pulping machine, rotating the mica material in the pulping machine at high speed under the action of high-pressure jet water with the pressure of 6.5MPa to generate collision and friction, stripping the mica material along the inside of the pulp, and preparing mica pulp sheets, wherein the water consumption of each ton of the mica material is 18-20 m 3 。
3. The method for manufacturing an overlength mica paper according to claim 1, wherein: the cloud master batch in the step (7) is prepared according to the content of 20-mesh 10%, 20-40-mesh 25%, 40-60-mesh 30%, 60-80-mesh 25% and more than 80-mesh 10%.
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| CN202011012444.9A CN112144318B (en) | 2020-09-24 | 2020-09-24 | Method for manufacturing overlong mica paper |
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| CN202011012444.9A CN112144318B (en) | 2020-09-24 | 2020-09-24 | Method for manufacturing overlong mica paper |
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| CN112144318B true CN112144318B (en) | 2023-03-31 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4026384A (en) * | 1974-12-17 | 1977-05-31 | Okabe Mica Co., Ltd. | Reconstituted mica acoustic diaphragm |
| CN203752619U (en) * | 2014-01-02 | 2014-08-06 | 雅安兴美云母工业有限责任公司 | Three-in-one mica paper |
| CN104452428A (en) * | 2014-11-17 | 2015-03-25 | 通城县中天云母制品有限公司 | Production method of calcining type high-voltage-resisting mica paper |
| CN105239443A (en) * | 2014-07-12 | 2016-01-13 | 平江县威派云母绝缘材料有限公司 | Environment-friendly preparation process for calcined-mica paper |
| CN105239444A (en) * | 2014-07-12 | 2016-01-13 | 平江县威派云母绝缘材料有限公司 | Preparation process for composite type mica paper for motor belt |
| CN105714593A (en) * | 2014-08-13 | 2016-06-29 | 平江县威派云母绝缘材料有限公司 | Method for preparing composite mica paper |
-
2020
- 2020-09-24 CN CN202011012444.9A patent/CN112144318B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4026384A (en) * | 1974-12-17 | 1977-05-31 | Okabe Mica Co., Ltd. | Reconstituted mica acoustic diaphragm |
| CN203752619U (en) * | 2014-01-02 | 2014-08-06 | 雅安兴美云母工业有限责任公司 | Three-in-one mica paper |
| CN105239443A (en) * | 2014-07-12 | 2016-01-13 | 平江县威派云母绝缘材料有限公司 | Environment-friendly preparation process for calcined-mica paper |
| CN105239444A (en) * | 2014-07-12 | 2016-01-13 | 平江县威派云母绝缘材料有限公司 | Preparation process for composite type mica paper for motor belt |
| CN105714593A (en) * | 2014-08-13 | 2016-06-29 | 平江县威派云母绝缘材料有限公司 | Method for preparing composite mica paper |
| CN104452428A (en) * | 2014-11-17 | 2015-03-25 | 通城县中天云母制品有限公司 | Production method of calcining type high-voltage-resisting mica paper |
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| Title |
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| 云母纸质量的影响因素;张小伟等;《矿产保护与利用》;20110225(第01期);第20页右栏 * |
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