CN111519463A - Chemical pulping process for high-insulativity mica paper - Google Patents
Chemical pulping process for high-insulativity mica paper Download PDFInfo
- Publication number
- CN111519463A CN111519463A CN202010495393.3A CN202010495393A CN111519463A CN 111519463 A CN111519463 A CN 111519463A CN 202010495393 A CN202010495393 A CN 202010495393A CN 111519463 A CN111519463 A CN 111519463A
- Authority
- CN
- China
- Prior art keywords
- mica
- pulping process
- chemical pulping
- mica paper
- insulation
- 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
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
- 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
-
- 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
- D21C1/00—Pretreatment of the finely-divided materials before digesting
-
- 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
- D21C3/00—Pulping cellulose-containing materials
- D21C3/04—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides
-
- 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
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/18—De-watering; Elimination of cooking or pulp-treating liquors from the pulp
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
Abstract
The invention discloses a chemical pulping process of high-insulation mica paper, belonging to the field of mica paper processing. The invention provides a chemical pulping process of high-insulation mica paper, and the mica paper prepared by the prepared mica pulp through procedures of papermaking and the like has higher insulation.
Description
Technical Field
The invention relates to the field of mica paper processing, in particular to a chemical pulping process of high-insulativity mica paper.
Background
Mica paper is a paper-like nonmetallic mineral material, which is a high-quality dielectric material prepared by using fine flake-like broken mica as a raw material through the steps of pulping, papermaking, molding, drying and the like, and is widely used in the electrical and electronic industries. The mica paper is completely made of pure natural mica, maintains the excellent performance of the natural mica, and has small fluctuation range of dielectric strength and high and stable corona initial voltage; however, the mica paper has a much more stable dielectric loss and a better thermal conductivity than mica sheets, and the mica paper has a low temperature rise in use, and all kinds of mica paper products corresponding to the mica sheets, so the mica paper has been used to replace natural mica sheets in many fields.
At present, the mica paper is prepared by a calcining method, and the preparation process is environment-friendly, so that the mica paper is widely applied to the production of the mica paper with low insulation requirement. However, with the increase of electric devices and the size reduction of electric devices, higher demands have been made on the insulation properties, the service life, and the like of mica paper.
Disclosure of Invention
The invention provides a chemical pulping process of high-insulation mica paper, and the mica paper prepared by the prepared mica pulp through procedures of papermaking and the like has higher insulation.
The invention comprises the following steps:
1) primary processing of ore: crushing mica ore, adding the crushed mica ore into a calcining furnace for calcining, wherein the calcining temperature is about 800 ℃ so as to remove moisture and impurities in the mica ore, and performing flotation on calcined mica;
2) preparing slurry: adding the mica ore treated in the step 1 into a reaction kettle to react with sulfuric acid to prepare slurry;
3) solid-liquid separation: and (3) injecting the slurry prepared in the step (2) into a centrifuge for centrifugation, and then collecting the mica slurry obtained after centrifugation for storage and standby.
Further, the concentration of the sulfuric acid used in the step 2 is 80% -95%, so that the conductive electrostatic ions can be removed efficiently.
Further, the reaction temperature in the step 2 is 90-110 ℃, and the reaction time is 50-80 minutes, so as to ensure that the sulfuric acid and the mica ore fully react.
Further, the slurry is filtered to remove impurities before being fed to a centrifuge.
Further, the rotation speed of the centrifuge in step 3 is 900-.
Further, the mica pulp in the step 3 is mixed pulp of 40-100 meshes.
The invention has the beneficial effects that: after the mica ore reacts with high-concentration sulfuric acid, the conductive static ions in the mica ore are completely removed, and the prepared mica pulp has excellent insulating property after being prepared into mica paper, so that the safety of electronic components can be improved, and the miniaturization of the electronic components can be matched.
1. The mica ore after high-temperature calcination has the advantages that water and impurities in the mica ore are removed, and the product quality can be improved.
Detailed Description
The present invention is further described in the following detailed description, which should be construed as exemplary only and is not intended to limit the scope of the invention, as defined in the appended claims, as all equivalent alterations that come within the spirit of the invention are therefore intended to be embraced therein.
Example 1: a chemical pulping process of high-insulation mica paper comprises the following steps:
1) primary processing of ore: firstly, manually screening before crushing mica ore to remove larger impurities and the like, then adding the mica ore into a hammer mill for crushing to obtain flaky mica sheets, then adding the mica sheets into a calcining furnace for calcining at the temperature of about 800 ℃, and then performing flotation on the calcined mica, namely putting the calcined mica sheets into a water tank for flotation, wherein the flotation liquid injected into the water tank is water, and selecting the floated mica;
2) preparing slurry: adding the mica ore treated in the step (1) into a reaction kettle to react with sulfuric acid with the concentration of 90% to prepare slurry, wherein the temperature in the reaction kettle is stabilized at 90-110 ℃, and the reaction time is 50-80 minutes;
3) solid-liquid separation: and (3) injecting the slurry prepared in the step (2) into a centrifuge for centrifugation, adding water to adjust the pH value when the slurry is injected into the centrifuge, collecting the mica slurry obtained after centrifugation for later use, adjusting the rotation speed of the centrifuge to 900-.
And (4) conveying the mica pulp prepared in the step (3) to a mica paper machine, then making paper by using a rotary screen, drying and the like to obtain a finished mica paper product.
Example 2: the remaining processing steps are the same as in example 1, but the sulfuric acid concentration used in step 2 is 80%.
Example 3: the remaining processing steps were the same as in example 1, but the sulfuric acid concentration used in step 2 was 95%.
After experiments, the electrical strength of the mica paper processed by the mica pulp prepared by the pulping process is more than 35 KV/mm.
The chemical pulping process of the high-insulation mica paper provided by the invention is described in detail, the principle and the embodiment of the invention are explained in the text, and the description of the embodiment is only used for helping to understand the method of the invention and the core idea of the method; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (6)
1. A chemical pulping process of high-insulation mica paper is characterized by comprising the following steps:
1) primary processing of ore: crushing mica ore, adding the crushed mica ore into a calcining furnace for calcining, and performing flotation on the calcined mica;
2) preparing slurry: adding the mica ore treated in the step 1 into a reaction kettle to react with sulfuric acid to prepare slurry;
3) solid-liquid separation: and (3) injecting the slurry prepared in the step (2) into a centrifuge for centrifugation, and then collecting the mica slurry obtained after centrifugation for storage and standby.
2. The chemical pulping process of high-insulation mica paper according to claim 1, wherein the concentration of sulfuric acid used in the step 2 is 80-95%.
3. The chemical pulping process of high-insulation mica paper according to claim 1, wherein the reaction temperature in the step 2 is 90-110 ℃ and the reaction time is 50-80 minutes.
4. The process of claim 1, wherein the slurry in step 3 is filtered to remove impurities before being fed into a centrifuge.
5. The chemical pulping process of mica paper with high insulation property as claimed in claim 1, wherein the rotation speed of the centrifuge in step 3 is 900-.
6. The chemical pulping process of high-insulation mica paper according to claim 1, wherein the mica pulp in the step 3 is a mixed pulp of 40-100 meshes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010495393.3A CN111519463A (en) | 2020-06-03 | 2020-06-03 | Chemical pulping process for high-insulativity mica paper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010495393.3A CN111519463A (en) | 2020-06-03 | 2020-06-03 | Chemical pulping process for high-insulativity mica paper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111519463A true CN111519463A (en) | 2020-08-11 |
Family
ID=71909871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010495393.3A Pending CN111519463A (en) | 2020-06-03 | 2020-06-03 | Chemical pulping process for high-insulativity mica paper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111519463A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5545599A (en) * | 1994-09-23 | 1996-08-13 | U.S. Borax, Inc. | Process for whitening kaolin |
| CN101748648A (en) * | 2010-02-09 | 2010-06-23 | 陕西科技大学 | Method for making mica paper by reinforcement of aramid short fiber and chemical pulping |
| CN102127882A (en) * | 2010-11-11 | 2011-07-20 | 杭州凯尔云母制品有限公司 | Manufacturing method of ultra-high voltage insulation cooked mica paper |
| CN102651261A (en) * | 2012-05-28 | 2012-08-29 | 四川美丰云母工业有限责任公司 | Manufacture method of mica paper for capacitor |
| CN104532685A (en) * | 2014-11-24 | 2015-04-22 | 泉州泉港华博化工科技有限公司 | Preparation method of high-insulation mica paper |
| CN106049166A (en) * | 2016-05-27 | 2016-10-26 | 雅安兴航云母有限责任公司 | 521 type capacitor mica paper and preparation method thereof |
-
2020
- 2020-06-03 CN CN202010495393.3A patent/CN111519463A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5545599A (en) * | 1994-09-23 | 1996-08-13 | U.S. Borax, Inc. | Process for whitening kaolin |
| CN101748648A (en) * | 2010-02-09 | 2010-06-23 | 陕西科技大学 | Method for making mica paper by reinforcement of aramid short fiber and chemical pulping |
| CN102127882A (en) * | 2010-11-11 | 2011-07-20 | 杭州凯尔云母制品有限公司 | Manufacturing method of ultra-high voltage insulation cooked mica paper |
| CN102651261A (en) * | 2012-05-28 | 2012-08-29 | 四川美丰云母工业有限责任公司 | Manufacture method of mica paper for capacitor |
| CN104532685A (en) * | 2014-11-24 | 2015-04-22 | 泉州泉港华博化工科技有限公司 | Preparation method of high-insulation mica paper |
| CN106049166A (en) * | 2016-05-27 | 2016-10-26 | 雅安兴航云母有限责任公司 | 521 type capacitor mica paper and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107204213B (en) | Production method of electrical-grade magnesium oxide powder | |
| CN109722945B (en) | Breakdown-resistant composite electrolytic capacitor paper and production method thereof | |
| US11661639B2 (en) | Method for whole component microwave fast digestion and precious metal extraction from ionic liquid of waste circuit board | |
| CN103771882A (en) | Permanent magnetic ferrite and preparation method and ultrathin permanent magnetic ferrite magnetic shoe thereof | |
| CN110284358A (en) | A kind of preparation method of aramid nano-fiber/montmorillonite insulating materials | |
| CN111519463A (en) | Chemical pulping process for high-insulativity mica paper | |
| CN104030614A (en) | Preparation method of plate mica | |
| CN105239444A (en) | Preparation process for composite type mica paper for motor belt | |
| CN111816861A (en) | Method for preparing lithium iron phosphate positive electrode material by using waste lithium iron phosphate pole pieces | |
| CN104452428A (en) | Production method of calcining type high-voltage-resisting mica paper | |
| CN116377756B (en) | Method for improving interfacial bonding performance of mica and reinforced fiber | |
| CN103496710B (en) | A kind of preparation method of high oil-absorption(number) ultrafine kaolin | |
| CN111215025A (en) | Composite adsorbent and preparation method and application thereof | |
| CN114622437B (en) | Method for preparing composite mica paper by using mica paper waste | |
| CN116002696A (en) | Recycling treatment method for waste mica paper, mica tape and mica plate | |
| CN103132369B (en) | Production method of sizing mica paper | |
| CN113751187B (en) | Quartz refined sand and preparation method and application thereof | |
| CN113493216B (en) | Method for preparing industrial-grade basic magnesium carbonate from salt lake brine | |
| CN107988842B (en) | Extra-high voltage low dielectric loss insulating material and production method thereof | |
| CN102923756A (en) | Manufacturing technique for electroplated level copper oxide | |
| CN105714593A (en) | Method for preparing composite mica paper | |
| CN112893830A (en) | Liquid phase grading method for magnetic metal powder | |
| CN106320059A (en) | Method for preparing of insulating paper containing modified montmorillonite | |
| KR20200091012A (en) | Manufacturing Method and Compositions for Power Saving Matter by using Al₂O₃, MgO and Shungite | |
| KR20200090311A (en) | Manufacturing Method and Compositions for Power Saving Matter by using SiO, Al₂O₃ and ZnO |
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: 20200811 |
|
| RJ01 | Rejection of invention patent application after publication |