CN115490510A - Manufacturing method of lightning arrester resistor disc - Google Patents
Manufacturing method of lightning arrester resistor disc Download PDFInfo
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- CN115490510A CN115490510A CN202211187238.0A CN202211187238A CN115490510A CN 115490510 A CN115490510 A CN 115490510A CN 202211187238 A CN202211187238 A CN 202211187238A CN 115490510 A CN115490510 A CN 115490510A
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- zinc oxide
- resistor disc
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 150
- 239000011787 zinc oxide Substances 0.000 claims abstract description 75
- 239000000654 additive Substances 0.000 claims abstract description 38
- 239000002270 dispersing agent Substances 0.000 claims abstract description 29
- 239000011230 binding agent Substances 0.000 claims abstract description 27
- 239000002994 raw material Substances 0.000 claims abstract description 26
- 230000000996 additive effect Effects 0.000 claims abstract description 24
- 239000002002 slurry Substances 0.000 claims abstract description 22
- 238000003756 stirring Methods 0.000 claims abstract description 21
- 238000001816 cooling Methods 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000000498 ball milling Methods 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 238000001035 drying Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000001354 calcination Methods 0.000 claims abstract description 7
- 238000011049 filling Methods 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 229910052863 mullite Inorganic materials 0.000 claims abstract description 7
- 239000000843 powder Substances 0.000 claims abstract description 7
- 239000003292 glue Substances 0.000 claims description 38
- 238000007599 discharging Methods 0.000 claims description 32
- 238000010438 heat treatment Methods 0.000 claims description 18
- 238000005245 sintering Methods 0.000 claims description 13
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 12
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 12
- 239000011248 coating agent Substances 0.000 claims description 12
- 238000000576 coating method Methods 0.000 claims description 12
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 claims description 12
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 12
- NDVLTYZPCACLMA-UHFFFAOYSA-N silver oxide Chemical compound [O-2].[Ag+].[Ag+] NDVLTYZPCACLMA-UHFFFAOYSA-N 0.000 claims description 12
- 229910000416 bismuth oxide Inorganic materials 0.000 claims description 8
- TYIXMATWDRGMPF-UHFFFAOYSA-N dibismuth;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Bi+3].[Bi+3] TYIXMATWDRGMPF-UHFFFAOYSA-N 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 238000000227 grinding Methods 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims description 6
- 229910021529 ammonia Inorganic materials 0.000 claims description 6
- 229910000410 antimony oxide Inorganic materials 0.000 claims description 6
- 239000000919 ceramic Substances 0.000 claims description 6
- 229910000423 chromium oxide Inorganic materials 0.000 claims description 6
- 229910000428 cobalt oxide Inorganic materials 0.000 claims description 6
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 claims description 6
- 238000005485 electric heating Methods 0.000 claims description 6
- 229910000480 nickel oxide Inorganic materials 0.000 claims description 6
- VTRUBDSFZJNXHI-UHFFFAOYSA-N oxoantimony Chemical compound [Sb]=O VTRUBDSFZJNXHI-UHFFFAOYSA-N 0.000 claims description 6
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 claims description 6
- 238000004321 preservation Methods 0.000 claims description 6
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 6
- 229910001923 silver oxide Inorganic materials 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 238000001694 spray drying Methods 0.000 claims description 6
- 238000003825 pressing Methods 0.000 abstract description 4
- 239000000306 component Substances 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 2
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- BNGXYYYYKUGPPF-UHFFFAOYSA-M (3-methylphenyl)methyl-triphenylphosphanium;chloride Chemical compound [Cl-].CC1=CC=CC(C[P+](C=2C=CC=CC=2)(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 BNGXYYYYKUGPPF-UHFFFAOYSA-M 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000011656 manganese carbonate Substances 0.000 description 1
- 229940093474 manganese carbonate Drugs 0.000 description 1
- 235000006748 manganese carbonate Nutrition 0.000 description 1
- 229910000016 manganese(II) carbonate Inorganic materials 0.000 description 1
- XMWCXZJXESXBBY-UHFFFAOYSA-L manganese(ii) carbonate Chemical compound [Mn+2].[O-]C([O-])=O XMWCXZJXESXBBY-UHFFFAOYSA-L 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/453—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zinc, tin, or bismuth oxides or solid solutions thereof with other oxides, e.g. zincates, stannates or bismuthates
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/52—Multiple coating or impregnating multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation
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- C04B41/89—Coating or impregnation for obtaining at least two superposed coatings having different compositions
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- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
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- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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- C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
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Abstract
The invention discloses a method for manufacturing a lightning arrester resistor disc, which comprises the following steps: s1: selecting raw materials, taking out zinc oxide and various additives in the raw materials, adding the additives into a ball milling tank, carrying out ball milling mixing, drying and crushing, filling the obtained mixture into a corundum-mullite sagger, calcining at 750-850 ℃ for 0.5-2 h, naturally cooling and crushing to form additive powder; s2: and then sequentially placing the additive of the powdery mixture prepared in the step S1 and zinc oxide in a stirring container, stirring, adding the organic binder, the dispersing agent and water, stirring the raw materials at 200-400 rpm to form slurry with uniform texture, granulating the slurry, and pressing to obtain a zinc oxide resistance card green body. By the method, the additive can be added into the raw materials, so that the using amount of the zinc oxide is reduced, the performance of the resistance card can be improved, and the production cost is reduced.
Description
Technical Field
The invention relates to the technical field of resistance cards, in particular to a manufacturing method of a lightning arrester resistance card.
Background
The lightning arrester is a key device for preventing lightning strike and flashover accidents of power grids and power equipment, and the zinc oxide resistance card has excellent nonlinear volt-ampere characteristics and impact energy absorption capacity, so that the zinc oxide resistance card is widely applied to the manufacturing of the lightning arrester. With the rapid development of the power industry, the requirements for lightning arresters and zinc oxide resistance cards are also increased. The zinc oxide resistor disc is used as a core component of the lightning arrester, and the development of the lightning arrester is directly restricted by the performance and the manufacturing level of the zinc oxide resistor disc. Therefore, how to obtain high-performance zinc oxide resistor disc is an important research direction for improving the quality of the lightning arrester.
At present, a zinc oxide resistance card mostly comprises a raw material formula system consisting of zinc oxide, calcium oxide, bismuth oxide, antimony trioxide, manganese carbonate, aluminum nitrate and the like, and the preparation method sequentially comprises the process steps of batching and grinding → granulating → water-containing tabletting → sintering → aluminum spraying and upper side insulation. But still has the problem that the electrical property of the obtained resistance card is deteriorated due to the fluctuation of the original formula caused by the easy volatilization of bismuth oxide during high-temperature sintering; the preparation method has conventional processes in all steps, and the obtained zinc oxide resistance card has prominent macroscopic air holes and poor microstructure and component uniformity, so that the potential gradient, the energy absorption capacity and the current impact resistance are low, the requirements of the ultra/extra-high voltage arrester device cannot be met, and the volume miniaturization of the zinc oxide resistance card is not facilitated.
Therefore, the prior art has a larger improvement space.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a method for manufacturing a resistor disc of an arrester.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: a manufacturing method of a lightning arrester resistor disc comprises the following steps:
s1: selecting raw materials, taking out zinc oxide and various additives in the raw materials, adding the additives into a ball milling tank, carrying out ball milling mixing, drying and crushing, filling the obtained mixture into a corundum-mullite sagger, calcining at 750-850 ℃ for 0.5-2 h, naturally cooling and crushing to form additive powder;
s2: then sequentially placing the additive of the powdery mixture prepared in the step S1 and zinc oxide in a stirring container, stirring, adding an organic binding agent, a dispersing agent and water, stirring the raw materials at 200-400 rpm to form slurry with uniform texture, and granulating the slurry to press the slurry into a zinc oxide resistance card green body;
s3: placing the zinc oxide resistance card green blank prepared in the step S2 in a glue discharging chamber, and controlling the temperature in the glue discharging chamber and the air temperature pressure in the glue discharging chamber to discharge glue on the zinc oxide resistance card green blank to obtain a zinc oxide resistance card blank;
s4: then taking out the zinc oxide resistance card blank obtained in the step S3, and burning off the organic binding agent and the dispersing agent at a high temperature of 400-450 ℃; then coating an inorganic high-resistance layer on the side surface of the resistor disc, and heating the resistor disc to 1000-1250 ℃/h from room temperature in an electric heating kiln for sintering, wherein the heating rate of a heating area for sintering is controlled to be 20-60 ℃/h, the temperature is kept in a heat preservation area of 1000-1250 ℃ for 4-10 h, and the cooling rate of a cooling area is controlled to be 60-110 ℃/h until the temperature is reduced to the room temperature, so that a resistor disc sintered body is obtained;
s5: and grinding and flattening two end surfaces of the resistor disc sintered body in the step S4, drying the resistor disc sintered body at the temperature of 100 ℃, spraying aluminum on the zinc oxide resistor disc sintered body, and coating a high-resistance layer and insulating glaze to obtain a finished zinc oxide resistor disc product.
Preferably, the raw materials comprise the following components in parts by mass: 60-80 parts of zinc oxide, 5-10 parts of additive, 1-3 parts of dispersant, 2-5 parts of organic binder and 40-70 parts of water.
Preferably, the components of the additive comprise two or more of bismuth oxide, chromium oxide, cobalt oxide, silver oxide, antimony oxide, nickel oxide, manganese oxide and silicon oxide.
Preferably, the dispersant is a polyacrylic acid ammonia dispersant or an A15 ceramic dispersant.
Preferably, the organic binder is a polyvinyl alcohol binder solution or a 5% concentration PVA-1799 polyvinyl alcohol solution.
Preferably, the water is pure water.
Preferably, the temperature in the glue discharging chamber in the step S3 is 300-400 ℃, and the air temperature and the pressure in the glue discharging chamber are controlled to be 30-50Mpa by introducing air.
Preferably, the solid content of the slurry in the S2 is controlled to be 62-69%, and the temperature of spray drying is controlled to be 90-160 ℃.
(III) advantageous effects
Compared with the prior art, the invention provides a method for manufacturing the lightning arrester resistance card, which has the following beneficial effects:
1. according to the manufacturing method of the lightning arrester resistance card, the additive can be added into the raw materials, so that the using amount of zinc oxide is reduced, the performance of the resistance card can be improved, and the production cost is reduced.
2. According to the manufacturing method of the arrester resistance card, the glue discharging is carried out by adding the glue discharging chamber, so that the impurities in the blank can be discharged by adjusting the internal pressure of the resistor, the purity of the resistance card is improved, the density and the mechanical strength of the resistance card are improved, and the service life of the resistance card is prolonged.
3. According to the manufacturing method of the lightning arrester resistance card, the resistance card is prepared by the method, has the characteristic of strong resistance performance, and can meet the performance requirements of an extra-high voltage lightning arrester.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
a manufacturing method of a lightning arrester resistor disc comprises the following steps:
s1: the raw materials are selected to be composed of the following components in parts by mass: 60 parts of zinc oxide, 5 parts of an additive consisting of two or more of bismuth oxide, chromium oxide, cobalt oxide, silver oxide, antimony oxide, nickel oxide, manganese oxide and silicon oxide, 1 part of a polyacrylic ammonia dispersant or an A15 ceramic dispersant, 2 parts of an organic binder of a polyvinyl alcohol binder solution or a 5% concentration PVA-1799 polyvinyl alcohol solution and 40 parts of pure water, then taking out the zinc oxide and the additives in the raw materials, adding the additives into a ball milling tank, carrying out ball milling mixing, drying and crushing, filling the obtained mixture into a corundum-mullite sagger, calcining at 750-850 ℃ for 0.5-2 h, naturally cooling and crushing to form additive powder;
s2: then sequentially placing the additive of the powdery mixture prepared in the step S1 and zinc oxide in a stirring container, stirring, adding an organic binder, a dispersing agent and pure water, stirring the raw materials at 200-400 rpm to form slurry with uniform texture, granulating the slurry, and pressing to obtain a zinc oxide resistance card green body; the solid content of the slurry is controlled to be 62-69%, and the temperature of spray drying is controlled to be 90-160 ℃;
s3: placing the zinc oxide resistance card green body obtained in the step S2 in a glue discharging chamber, and controlling the temperature in the glue discharging chamber and the air temperature pressure in the glue discharging chamber to discharge glue on the zinc oxide resistance card green body to obtain a zinc oxide resistance card blank, wherein the temperature in the glue discharging chamber is 300-400 ℃, and the air temperature pressure in the glue discharging chamber is 30-50Mpa by introducing air;
s4: then taking out the zinc oxide resistance card blank obtained in the step S3, and burning off the organic binding agent and the dispersing agent at a high temperature of 400-450 ℃; then coating an inorganic high-resistance layer on the side surface of the resistance chip, and heating the resistance chip to 1000-1250 ℃/h in an electric heating kiln from room temperature to sinter, wherein the heating rate of a heating area of the sintering is controlled to be 20-60 ℃/h, the heat preservation area of 1000-1250 ℃ is kept for 4-10 h, and the cooling rate of a cooling area is controlled to be 60-110 ℃/h until the temperature is reduced to room temperature, so that a resistance chip sintered body is obtained;
s5: and grinding and flattening two end surfaces of the resistor disc sintered body in the step S4, drying the resistor disc sintered body at the temperature of 100 ℃, spraying aluminum on the zinc oxide resistor disc sintered body, and coating a high-resistance layer and insulating glaze to obtain a finished zinc oxide resistor disc product.
The second embodiment:
a manufacturing method of a lightning arrester resistor disc comprises the following steps:
s1: the raw materials are selected to be composed of the following components in parts by mass: 65 parts of zinc oxide, 6 parts of an additive containing two or more of bismuth oxide, chromium oxide, cobalt oxide, silver oxide, antimony oxide, nickel oxide, manganese oxide and silicon oxide, 1.5 parts of a polyacrylic ammonia dispersant or an A15 ceramic dispersant, 3 parts of an organic binder of a polyvinyl alcohol binder solution or a 5% PVA-1799 polyvinyl alcohol solution, and 48 parts of pure water, then taking out the zinc oxide and the additives from the raw materials, adding the additives into a ball milling tank, carrying out ball milling mixing, drying and crushing, then filling the obtained mixture into a corundum mullite sagger, calcining at 750-850 ℃ for 0.5-2 h, naturally cooling and crushing to form additive powder;
s2: then sequentially placing the additive of the powdery mixture prepared in the step S1 and zinc oxide in a stirring container, stirring, adding an organic binder, a dispersing agent and pure water, stirring the raw materials at 200-400 rpm to form slurry with uniform texture, granulating the slurry, and pressing to obtain a zinc oxide resistance card green body; the solid content of the slurry is controlled to be 62-69%, and the temperature of spray drying is controlled to be 90-160 ℃;
s3: placing the zinc oxide resistance card blank prepared in the step (2) in a glue discharging chamber, and controlling the temperature in the glue discharging chamber and the air temperature pressure in the glue discharging chamber to discharge glue on the zinc oxide resistance card blank to obtain a zinc oxide resistance card blank, wherein the temperature in the glue discharging chamber is 300-400 ℃, and the air temperature pressure in the glue discharging chamber is controlled to be 30-50Mpa by introducing air;
s4: then taking out the zinc oxide resistance card blank obtained in the step S3, and burning off the organic binder and the dispersant at a high temperature of 400-450 ℃; then coating an inorganic high-resistance layer on the side surface of the resistor disc, and heating the resistor disc to 1000-1250 ℃/h from room temperature in an electric heating kiln for sintering, wherein the heating rate of a heating area for sintering is controlled to be 20-60 ℃/h, the temperature is kept in a heat preservation area of 1000-1250 ℃ for 4-10 h, and the cooling rate of a cooling area is controlled to be 60-110 ℃/h until the temperature is reduced to the room temperature, so that a resistor disc sintered body is obtained;
s5: and grinding and flattening two end surfaces of the resistor disc sintered body in the step S4, drying the resistor disc sintered body at the temperature of 100 ℃, spraying aluminum on the zinc oxide resistor disc sintered body, and coating a high-resistance layer and insulating glaze to obtain a finished zinc oxide resistor disc product.
Example three:
a manufacturing method of a lightning arrester resistor disc comprises the following steps:
s1: the raw materials are selected to be composed of the following components in parts by mass: 70 parts of zinc oxide, 7 parts of an additive consisting of two or more of bismuth oxide, chromium oxide, cobalt oxide, silver oxide, antimony oxide, nickel oxide, manganese oxide and silicon oxide, 2 parts of a polyacrylic ammonia dispersant or an A15 ceramic dispersant, 4 parts of an organic binder of a polyvinyl alcohol binder solution or a 5% concentration PVA-1799 polyvinyl alcohol solution, and 58 parts of pure water, then taking out the zinc oxide and the additives in the raw materials, adding the additives into a ball milling tank, carrying out ball milling mixing, drying and crushing, filling the obtained mixture into a corundum-mullite sagger, calcining at 750-850 ℃ for 0.5-2 h, naturally cooling and crushing to form additive powder;
s2: then sequentially placing the additive of the powdery mixture prepared in the step S1 and zinc oxide in a stirring container, stirring, adding an organic binder, a dispersing agent and pure water, stirring the raw materials at 200-400 rpm to form slurry with uniform texture, and granulating the slurry to be pressed into a zinc oxide resistor disc green body; the solid content of the slurry is controlled to be 62-69%, and the temperature of spray drying is controlled to be 90-160 ℃;
s3: placing the zinc oxide resistance card green body obtained in the step S2 in a glue discharging chamber, and controlling the temperature in the glue discharging chamber and the air temperature pressure in the glue discharging chamber to discharge glue on the zinc oxide resistance card green body to obtain a zinc oxide resistance card blank, wherein the temperature in the glue discharging chamber is 300-400 ℃, and the air temperature pressure in the glue discharging chamber is 30-50Mpa by introducing air;
s4: then taking out the zinc oxide resistance card blank obtained in the step S3, and burning off the organic binding agent and the dispersing agent at a high temperature of 400-450 ℃; then coating an inorganic high-resistance layer on the side surface of the resistor disc, and heating the resistor disc to 1000-1250 ℃/h from room temperature in an electric heating kiln for sintering, wherein the heating rate of a heating area for sintering is controlled to be 20-60 ℃/h, the temperature is kept in a heat preservation area of 1000-1250 ℃ for 4-10 h, and the cooling rate of a cooling area is controlled to be 60-110 ℃/h until the temperature is reduced to the room temperature, so that a resistor disc sintered body is obtained;
s5: and grinding and flattening two end surfaces of the resistor disc sintered body in the step S4, drying the resistor disc sintered body at the temperature of 100 ℃, spraying aluminum on the zinc oxide resistor disc sintered body, and coating a high-resistance layer and insulating glaze to obtain a finished zinc oxide resistor disc product.
Example four:
a manufacturing method of a lightning arrester resistor disc comprises the following steps:
s1: the raw materials are selected to comprise the following components in parts by mass: 80 parts of zinc oxide, 10 parts of an additive consisting of two or more of bismuth oxide, chromium oxide, cobalt oxide, silver oxide, antimony oxide, nickel oxide, manganese oxide and silicon oxide, 3 parts of a polyacrylic ammonia dispersant or an A15 ceramic dispersant, 5 parts of an organic binder of a polyvinyl alcohol binder solution or a 5% concentration PVA-1799 polyvinyl alcohol solution and 70 parts of pure water, then taking out the zinc oxide and the additives in the raw materials, adding the additives into a ball milling tank, carrying out ball milling mixing, drying and crushing, filling the obtained mixture into a corundum-mullite sagger, calcining at 750-850 ℃ for 0.5-2 h, naturally cooling and crushing to form additive powder;
s2: then sequentially placing the additive of the powdery mixture prepared in the step S1 and zinc oxide in a stirring container, stirring, adding an organic binder, a dispersing agent and pure water, stirring the raw materials at 200-400 rpm to form slurry with uniform texture, granulating the slurry, and pressing to obtain a zinc oxide resistance card green body; the solid content of the slurry is controlled to be 62-69%, and the temperature of spray drying is controlled to be 90-160 ℃;
s3: placing the zinc oxide resistance card green body obtained in the step S2 in a glue discharging chamber, and controlling the temperature in the glue discharging chamber and the air temperature pressure in the glue discharging chamber to discharge glue on the zinc oxide resistance card green body to obtain a zinc oxide resistance card blank, wherein the temperature in the glue discharging chamber is 300-400 ℃, and the air temperature pressure in the glue discharging chamber is 30-50Mpa by introducing air;
s4: then taking out the zinc oxide resistance card blank obtained in the step S3, and burning off the organic binding agent and the dispersing agent at a high temperature of 400-450 ℃; then coating an inorganic high-resistance layer on the side surface of the resistor disc, and heating the resistor disc to 1000-1250 ℃/h from room temperature in an electric heating kiln for sintering, wherein the heating rate of a heating area for sintering is controlled to be 20-60 ℃/h, the temperature is kept in a heat preservation area of 1000-1250 ℃ for 4-10 h, and the cooling rate of a cooling area is controlled to be 60-110 ℃/h until the temperature is reduced to the room temperature, so that a resistor disc sintered body is obtained;
s5: and grinding and flattening two end surfaces of the resistor disc sintered body in the step S4, drying the resistor disc sintered body at the temperature of 100 ℃, spraying aluminum on the zinc oxide resistor disc sintered body, and coating a high-resistance layer and insulating glaze to obtain a finished zinc oxide resistor disc product.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A manufacturing method of a lightning arrester resistor disc is characterized by comprising the following steps:
s1: selecting raw materials, taking out zinc oxide and additives in the raw materials, adding the additives into a ball milling tank, carrying out ball milling mixing, drying and crushing, filling the obtained mixture into a corundum-mullite sagger, calcining at 750-850 ℃ for 0.5-2 h, naturally cooling and crushing to form additive powder;
s2: then sequentially placing the additive of the powdery mixture prepared in the step S1 and zinc oxide in a stirring container, stirring, adding an organic binding agent, a dispersing agent and water, stirring the raw materials at 200-400 rpm to form slurry with uniform texture, and granulating the slurry to press the slurry into a zinc oxide resistance card green body;
s3: placing the zinc oxide resistance card blank prepared in the step (2) in a glue discharging chamber, and controlling the temperature in the glue discharging chamber and the air temperature pressure in the glue discharging chamber to discharge glue from the zinc oxide resistance card blank to obtain a zinc oxide resistance card blank;
s4: then taking out the zinc oxide resistance card blank obtained in the step S3, and burning off the organic binder and the dispersant at a high temperature of 400-450 ℃; then coating an inorganic high-resistance layer on the side surface of the resistor disc, and heating the resistor disc to 1000-1250 ℃/h from room temperature in an electric heating kiln for sintering, wherein the heating rate of a heating area for sintering is controlled to be 20-60 ℃/h, the temperature is kept in a heat preservation area of 1000-1250 ℃ for 4-10 h, and the cooling rate of a cooling area is controlled to be 60-110 ℃/h until the temperature is reduced to the room temperature, so that a resistor disc sintered body is obtained;
s5: and grinding and flattening two end surfaces of the resistor disc sintered body in the step S4, drying the resistor disc sintered body at the temperature of 100 ℃, spraying aluminum on the zinc oxide resistor disc sintered body, and coating a high-resistance layer and insulating glaze to obtain a finished zinc oxide resistor disc product.
2. The manufacturing method of the arrester resistor disc according to claim 1, characterized in that the raw materials comprise the following components in parts by mass: 60-80 parts of zinc oxide, 5-10 parts of additive, 1-3 parts of dispersant, 2-5 parts of organic binder and 40-70 parts of water.
3. The method for manufacturing the arrester resistor disc according to claim 2, wherein the additive comprises two or more of bismuth oxide, chromium oxide, cobalt oxide, silver oxide, antimony oxide, nickel oxide, manganese oxide and silicon oxide.
4. A method for manufacturing a lightning arrester resistor disc according to claim 2, characterized in that the dispersant is a polyacrylic ammonia dispersant or an a15 ceramic dispersant.
5. The method of claim 2, wherein the organic binder is a polyvinyl alcohol binder solution or a 5% PVA-1799 polyvinyl alcohol solution.
6. A method for manufacturing a surge arrester resistor disc according to claim 2, wherein the water is pure water.
7. The manufacturing method of the arrester resistor disc according to claim 1, wherein the temperature in the glue discharging chamber in S3 is 300-400 ℃, and the atmospheric pressure in the glue discharging chamber is 30-50Mpa by introducing air.
8. The method for manufacturing the arrester resistor disc according to claim 1, wherein the solid content of the slurry in the S2 is controlled to be 62-69%, and the temperature of the spray drying is controlled to be 90-160 ℃.
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| JPH03257902A (en) * | 1990-03-08 | 1991-11-18 | Ngk Insulators Ltd | Manufacture of voltage nonlinear resistor |
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