CN112144318A - Method for manufacturing overlong mica paper - Google Patents
Method for manufacturing overlong mica paper Download PDFInfo
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- CN112144318A CN112144318A CN202011012444.9A CN202011012444A CN112144318A CN 112144318 A CN112144318 A CN 112144318A CN 202011012444 A CN202011012444 A CN 202011012444A CN 112144318 A CN112144318 A CN 112144318A
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- mica
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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
-
- 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 firstly selecting mica materials, screening the mica materials, then calcining, stewing and dehydrating the mica materials, proportioning the mica materials according to the content of 20 meshes of 10%, 20 meshes of 25%, 40 meshes of 30%, 60 meshes of 80 meshes of 25% and 80 meshes of 10% to obtain mica slurry, and finally papermaking the mica paper. 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 before2Improved to 7N/cm2The 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/M3Increased to 3500S/M3，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 the 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 inertia 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 smell, 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 mica paper is not long enough, the mica paper with the length of more than 800 meters is broken, and the mica tape is continuously stopped for lapping when being produced, thereby not only influencing the product quality, but also reducing the production efficiency; 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/MM3 。
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:
finely selecting a mica material: 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;
sieving the mica material: 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, so as to carry out calcination for different time lengths;
③ calcining the 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;
fourthly, 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;
sixthly, sieving and dehydrating: feeding the crushed mica into a screening dehydrator, classifying and storing the mica 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;
concentration ratio: the mica pulp is prepared according to the content of 20 meshes of 10%, 20 meshes to 40 meshes of 25%, 40 meshes to 60 meshes of 30%, 60 meshes to 80 meshes of 25% and 80 meshes of 10%, and the electrostatic interaction and the tensile strength among mica paper can be enhanced through scientific proportioning;
making mica paper: and adding water into the proportioned cloud master batch to dilute into slurry with the mass concentration of 5-6% for papermaking.
Preferably, in the step (c), the calcination temperature of the mica masterbatch is 750-850 ℃, wherein the calcination time of the small material is 30 minutes, and the calcination time of the large material is 50 minutes, the size classification calcination can save energy, and the calcination can not only remove crystal water, but also further remove impurities.
Preferably, in the step IV, the cooking temperature of the mica master batch 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 master batch can conveniently sink to the bottom of the crusher.
Preferably, in the fifth step, the steamed mica material is put 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 per ton of the mica material is 18-20M3 。
Preferably, the Zhongyun master batch is prepared according to the content of 20 meshes of 10%, 20 meshes of 25%, 40 meshes of 60 meshes of 30%, 60 meshes of 80 meshes of 25% and 80 meshes of 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 before2Improved to 7N/cm2The 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/M3Increased to 3500S/M3，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 the surrounding environment.
Detailed Description
The present invention relates to a method for producing an ultralong 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 ℃ and 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 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 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 20 meshes, 40 meshes, 60 meshes, 80 meshes and over 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 adding water into the proportioned cloud master batch to dilute into slurry with the mass concentration of 6% for papermaking.
Example 3:
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, so as to carry out calcination 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 ℃ and 0.2MPa for 45 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 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 adding water into the proportioned cloud master batch to dilute into slurry with the mass concentration of 5.5% for papermaking.
Claims (5)
1. A method for manufacturing super-long mica paper is characterized in that: the manufacturing method comprises the following steps:
finely selecting a mica material: removing gravels, soil and impurities in the cloud master batch;
sieving the mica material: 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 the mica material: calcining the mica material according to the classification of small materials and large materials, and burning out crystal water;
fourthly, cooking the mica material: steaming the calcined mica material to ensure that the mica material fully absorbs water;
crushing the mica material: crushing the mica material by adopting water with the pressure of 6.5 MP;
sixthly, sieving and dehydrating: feeding the crushed mica into a screening dehydrator, classifying and storing the mica 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;
concentration ratio: mixing the mica slurry according to the content of 10 percent below 20 meshes, 25 percent below 20-40 meshes, 30 percent between 40-60 meshes, 25 percent between 60-80 meshes and 10 percent above 80 meshes to obtain mica slurry;
making mica paper: and adding water into the proportioned cloud master batch to dilute into slurry with the mass concentration of 5-6% for papermaking.
2. The method for manufacturing an overlength mica paper according to claim 1, characterized in that: and step three, calcining the Zhongyun master batch at the temperature of 750-850 ℃, wherein the small material is calcined for 30-50 minutes, and the large material is calcined for 50-70 minutes.
3. The method for manufacturing an overlength mica paper according to claim 1, characterized in that: and fourthly, the cooking temperature of the Zhongyun master batch is 90-100 ℃, the cooking pressure is 0.15-0.25 MPa, and the cooking time is 30-60 minutes.
4. The method for manufacturing an overlength mica paper according to claim 1, characterized in that: putting the steamed mica material into a pulping machine from a feeding cylinder, sinking the mica material after water absorption into a crushing part of the pulping machine, rotating the mica material in the pulping machine at a 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 18-20M3 。
5. The method for manufacturing an overlength mica paper according to claim 1, characterized in that: the Zhongyun master batch is prepared according to the content of 10 percent of 20 meshes, 25 percent of 20-40 meshes, 30 percent of 40-60 meshes, 25 percent of 60-80 meshes and 10 percent of more than 80 meshes.
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| CN202011012444.9A CN112144318B (en) | 2020-09-24 | 2020-09-24 | Method for manufacturing overlong mica paper |
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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 |
Non-Patent Citations (3)
| Title |
|---|
| 张小伟等: "云母纸质量的影响因素", 《矿产保护与利用》 * |
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| 黄鸿: "云母纸的生产工艺及应用", 《中华纸业》 * |
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