CN106057281B - A kind of fireproof cable sheath type magnesia - Google Patents
A kind of fireproof cable sheath type magnesia Download PDFInfo
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- CN106057281B CN106057281B CN201610403069.8A CN201610403069A CN106057281B CN 106057281 B CN106057281 B CN 106057281B CN 201610403069 A CN201610403069 A CN 201610403069A CN 106057281 B CN106057281 B CN 106057281B
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Abstract
The present invention provides a kind of fireproof cable sheath type magnesia, and the preparation method of fireproof cable sheath type magnesia includes the following steps：Machine silicone oil and toluene are configured to solution in proportion, the electrically molten magnesia that crushing, magnetic separation, baking obtain proportionally is mixed with calcined kaolin；Mixture is mixed with solution；After mixture is dried in rotary furnace, proportionally mixed with aluminium dihydrogen phosphate powder；The magnesia wet feed that mixture and water are mixed to get is put into compression moulding in grinding tool；By molding magnesia, dry solidification, cooling obtain fireproof cable sheath type magnesia in an oven.Fireproof cable of the present invention is with sheath type magnesia is at low cost, insulation performance is high, and humidity resistance is good, and intensity is big, and high temperature resistance is strong.
Description
Technical field
The present invention relates to magnesia technology more particularly to a kind of fireproof cable sheath type magnesia.
Background technology
Existing sheath type magnesia is low-grade using raw material, and insulation heat resistance is poor, without humidity resistance, prepare sheath into
The binding agent generally use clay or resin that type uses, decreasing insulating is easy to cause using clay, using resin as viscous
Knot agent can reduce the heat resistance of sheath type magnesia, it is impossible to be heated under 1300 DEG C of high temperature.And added using resin in high temperature
It will appear smoke event in the case of heat.
Invention content
It is an object of the present invention to low for existing sheath type magnesium oxide insulated, the resistance to temperature difference is non-moistureproof, the problem of smoldering,
It is proposed a kind of preparation method of fireproof cable sheath type magnesia, this method is simple, easy, is prepared using this method
Fireproof cable sheath type magnesia.
To achieve the above object, the technical solution adopted by the present invention is：A kind of system of fireproof cable sheath type magnesia
Preparation Method includes the following steps：
Step 1, electrically molten magnesia raw material are crushed to 200-500 mesh, and magnetic separator magnetic separation removes ferromagnetism object impurity, then
Baking is handled in 500-700 DEG C of rotary furnace, and cooling is for use；
Step 2, by kaolin of the iron oxide content less than 0.4-0.5 in 700-900 DEG C of temperature lower calcination 1-3 hours；
Step 3, by organic silicone oil and toluene according to weight ratio 1：The proportional arrangement of 80-120 is into solution；
Step 4, the electrically molten magnesia for obtaining step 1 are 1000 according to weight ratio with the kaolin that step 2 obtains：3-7
Ratio mixed in blender；
The solution that step 5, the mixture for obtaining step 4 are prepared with step 3 is according to weight ratio 900-1100：1 ratio
It is mixed in blender；
Step 6, the mixture for obtaining step 5 are dried 30-90 minutes in 200-400 DEG C of rotary furnace, for use after cooling；
Step 7, the mixture that step 6 is obtained and aluminium dihydrogen phosphate powder are according to weight ratio 1000：The ratio of 8-12 exists
It is mixed in blender；
Step 8, the mixture that step 7 is obtained and water are according to weight ratio 10：The ratio of 0.5-2 mixes in blender
To magnesia wet feed；
Step 9 puts into magnesia wet feed in grinding tool, is pressed with the pressure of 30-80kg；
Step 10, by the molding magnesia of step 9 in an oven 200-400 DEG C be dried curing, cooling prevented fires
Cable jacket type magnesia.
Further, the fireproof cable preparation method of sheath type magnesia, includes the following steps：
Step 1, electrically molten magnesia raw material are crushed to 300-400 mesh, and magnetic separator magnetic separation removes ferromagnetism object impurity, then
Baking is handled in 550-650 DEG C of rotary furnace, baking processing in preferred 550-650 DEG C of rotary furnace, and cooling is for use；
Step 2, by kaolin of the iron oxide content less than 0.5 in 750-850 DEG C of temperature lower calcination 1.5-2.5 hours, more
Preferably in 800 DEG C of temperature lower calcinations 2 hours；
Step 3, by organic silicone oil and toluene according to weight ratio 1：The proportional arrangement of 90-110 is into solution, preferred weight
Than being 1：100；
Step 4, the electrically molten magnesia for obtaining step 1 are 1000 according to weight ratio with the kaolin that step 2 obtains：4-6
Ratio mixed in blender, preferred weight ratio be 1000：5；
The solution that step 5, the mixture for obtaining step 4 are prepared with step 3 is according to weight ratio 950-1050：1 ratio
It is mixed in blender, preferred weight ratio is 1005：1；
Step 6, the mixture for obtaining step 5 are dried 50-80 minutes in 250-350 DEG C of rotary furnace, for use after cooling；
Step 7, the mixture that step 6 is obtained and aluminium dihydrogen phosphate powder are according to weight ratio 1000：The ratio of 9-11 exists
It is mixed in blender, preferred weight ratio is 1000：10；
Step 8, the mixture that step 7 is obtained and water are according to weight ratio 10：The ratio of 1-2 is mixed to get in blender
Magnesia wet feed, preferred weight ratio are 10：1；
Step 9 puts into magnesia wet feed in grinding tool, is pressed with the pressure of 40-60kg, preferred to press
Power is 50；
Curing, cooling, detection conjunction is dried for 250-350 DEG C in an oven in the molding magnesia of step 9 by step 10
Lattice are packaged to be fireproof cable sheath type magnesia finished product.
Further, the mass percentage of each component is in electrically molten magnesia raw material：
The present invention is low using electrically molten magnesia raw material impurity content, and stability is high.
Another object of the present invention additionally provides a kind of fireproof cable sheath type magnesia, using above method system
It is standby to form.
Fireproof cable of the present invention sheath type Mg oxide formulations science, rationally, preparation method is simple, easy, and existing
Technology, which compares, to be had the following advantages：Clay, resin etc. is not used in the formula of fireproof cable of the present invention sheath type magnesia
Material while production cost is reduced, also improves insulation performance, humidity resistance, intensity and high temperature resistance.Specifically,
Fireproof cable of the present invention is with sheath type magnesium oxide insulated performance detection data：1000 megaohms or more；It is anti-that moisture resistance is embodied in this
Thermoelectricity cable does not absorb the moisture in air with sheath type magnesia, will not be declined using insulation for a long time, remain at 1000
Megaohm or more；Strength character detects：Refer to position freely falling body of the magnesia sheath produced at 1 meter high, it is not chipping
Phenomenon；High temperature resistance refers to keep original property constant under 1050 DEG C of high temperature.Using fireproof cable sheath type of the present invention
The cable that magnesia is prepared under 1300 DEG C of high temperature long-time heating without damage.
Specific embodiment
The present invention is further described with reference to embodiments：
Embodiment 1
Present embodiment discloses a kind of fireproof cable preparation methods of sheath type magnesia, include the following steps：
Step 1, electrically molten magnesia raw material are crushed to 300-400 mesh, and magnetic separator magnetic separation removes ferromagnetism object impurity, then
Baking is handled in 600 DEG C of rotary furnaces, and cooling is for use；
Step 2, by kaolin of the iron oxide content less than 0.4 in 800 DEG C of temperature lower calcinations 1 hour；
Step 3, by organic silicone oil and toluene according to weight ratio 1：90 proportional arrangement is into solution；
Step 4, the electrically molten magnesia for obtaining step 1 are 1000 according to weight ratio with the kaolin that step 2 obtains：4
Ratio mixes in blender；
The solution that step 5, the mixture for obtaining step 4 are prepared with step 3 is according to weight ratio 1000：1 ratio is being stirred
It mixes in device and mixes；
Step 6 dries the mixture that step 5 obtains 60 minutes in 300 DEG C of rotary furnaces, for use after cooling；
Step 7, the mixture that step 6 is obtained and aluminium dihydrogen phosphate powder are according to weight ratio 1000：10 ratio is being stirred
It mixes in device and mixes；
Step 8, the mixture that step 7 is obtained and water are according to weight ratio 10：1 ratio is mixed to get oxygen in blender
Change magnesium wet feed；
Step 9 puts into magnesia wet feed in grinding tool, is pressed with the pressure of 70kg；
Step 10, by the molding magnesia of step 9 in an oven 300 DEG C be dried curing, cooling obtain fireproof cable
With sheath type magnesia.
Detection method：It is prepared into after sheath and carries out test insulation performance using insulation megger.
Hi-pot test is carried out using voltage resistant instrument.
1300 DEG C of progress high-temperature calcination experiments in Muffle furnace, ensure that sheath does not damage, insulate simultaneously, resistance to
The performances such as pressure do not decline.
Embodiment 2
Present embodiment discloses a kind of fireproof cable preparation methods of sheath type magnesia, include the following steps：
Step 1, electrically molten magnesia raw material are crushed to 200-300 mesh, and magnetic separator magnetic separation removes ferromagnetism object impurity, then
Baking is handled in 700 DEG C of rotary furnaces, and cooling is for use；
Step 2, by kaolin of the iron oxide content less than 0.5 in 900 DEG C of temperature lower calcinations 3 hours；
Step 3, by organic silicone oil and toluene according to weight ratio 1：90 proportional arrangement is into solution；
Step 4, the electrically molten magnesia for obtaining step 1 are 1000 according to weight ratio with the kaolin that step 2 obtains：5
Ratio mixes in blender；
The solution that step 5, the mixture for obtaining step 4 are prepared with step 3 is according to weight ratio 1100：1 ratio is being stirred
It mixes in device and mixes；
Step 6 dries the mixture that step 5 obtains 30 minutes in 400 DEG C of rotary furnaces, for use after cooling；
Step 7, the mixture that step 6 is obtained and aluminium dihydrogen phosphate powder are according to weight ratio 1000：10 ratio is being stirred
It mixes in device and mixes；
Step 8, the mixture that step 7 is obtained and water are according to weight ratio 10：0.5 ratio is mixed to get in blender
Magnesia wet feed；
Step 9 puts into magnesia wet feed in grinding tool, is pressed with the pressure of 80kg；
Step 10, by the molding magnesia of step 9 in an oven 200 DEG C be dried curing, cooling obtain fireproof cable
With sheath type magnesia.
Detection method：It is prepared into after sheath and carries out test insulation performance using insulation megger.
Hi-pot test is carried out using voltage resistant instrument.
1300 DEG C of progress high-temperature calcination experiments in Muffle furnace, ensure that sheath does not damage, insulate simultaneously, resistance to
The performances such as pressure do not decline.
Embodiment 3
Present embodiment discloses a kind of fireproof cable preparation methods of sheath type magnesia, include the following steps：
Step 1, electrically molten magnesia raw material are crushed to 400-500 mesh, and magnetic separator magnetic separation removes ferromagnetism object impurity, then
Baking is handled in 500-700 DEG C of rotary furnace, and cooling is for use；
Step 2, by kaolin of the iron oxide content less than 0.5 in 900 DEG C of temperature lower calcinations 3 hours；
Step 3, by organic silicone oil and toluene according to weight ratio 1：120 proportional arrangement is into solution；
Step 4, the electrically molten magnesia for obtaining step 1 are 1000 according to weight ratio with the kaolin that step 2 obtains：7
Ratio mixes in blender；
The solution that step 5, the mixture for obtaining step 4 are prepared with step 3 is according to weight ratio 900：1 ratio is stirring
It is mixed in device；
Step 6 dries the mixture that step 5 obtains 90 minutes in 200 DEG C of rotary furnaces, for use after cooling；
Step 7, the mixture that step 6 is obtained and aluminium dihydrogen phosphate powder are according to weight ratio 1000：12 ratio is being stirred
It mixes in device and mixes；
Step 8, the mixture that step 7 is obtained and water are according to weight ratio 10：2 ratio is mixed to get oxygen in blender
Change magnesium wet feed；
Step 9 puts into magnesia wet feed in grinding tool, is pressed with the pressure of 80kg；
Step 10, by the molding magnesia of step 9 in an oven 400 DEG C be dried curing, cooling obtain fireproof cable
With sheath type magnesia.
Detection method：It is prepared into after sheath and carries out test insulation performance using insulation megger.
Hi-pot test is carried out using voltage resistant instrument.
1300 DEG C of progress high-temperature calcination experiments in Muffle furnace, ensure that sheath does not damage, insulate simultaneously, resistance to
The performances such as pressure do not decline.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe is described in detail the present invention with reference to foregoing embodiments, it will be understood by those of ordinary skill in the art that：Its according to
Can so modify to the technical solution recorded in foregoing embodiments either to which part or all technical features into
Row equivalent replacement；And these modifications or replacement, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (1)
1. a kind of fireproof cable sheath type magnesia, which is characterized in that be prepared by following preparation method, including following step
Suddenly：
Step 1, electrically molten magnesia raw material are crushed to 300-400 mesh, and magnetic separator magnetic separation removes ferromagnetism object impurity, then 500
Baking is handled in DEG C rotary furnace, and cooling is for use；
Step 2, by kaolin of the iron oxide content less than 0.4 in 800 DEG C of temperature lower calcinations 1 hour；
Step 3, by organic silicone oil and toluene according to weight ratio 1：90 proportional arrangement is into solution；
Step 4, the electrically molten magnesia for obtaining step 1 are 1000 according to weight ratio with the kaolin that step 2 obtains：4 ratio
It is mixed in blender；
The solution that step 5, the mixture for obtaining step 4 are prepared with step 3 is according to weight ratio 1000：1 ratio is in blender
Middle mixing；
Step 6 dries the mixture that step 5 obtains 60 minutes in 300 DEG C of rotary furnaces, for use after cooling；
Step 7, the mixture that step 6 is obtained and aluminium dihydrogen phosphate powder are according to weight ratio 1000：10 ratio is in blender
Middle mixing；
Step 8, the mixture that step 7 is obtained and water are according to weight ratio 10：1 ratio is mixed to get magnesia in blender
Wet feed；
Step 9 puts into magnesia wet feed in grinding tool, is pressed with the pressure of 70kg；
Curing, cooling, detection qualification is dried for 300 DEG C in an oven in the molding magnesia of step 9 by step 10, is packed
To fireproof cable sheath type magnesia finished product；
The mass percentage of each component is in the electrically molten magnesia raw material：
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| CN201610403069.8A CN106057281B (en) | 2016-06-08 | 2016-06-08 | A kind of fireproof cable sheath type magnesia |
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| CN201610403069.8A CN106057281B (en) | 2016-06-08 | 2016-06-08 | A kind of fireproof cable sheath type magnesia |
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| CN106057281B true CN106057281B (en) | 2018-07-10 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101915897B1 (en) * | 2017-06-01 | 2018-11-06 | 정태혁 | A radiator equipped with a heating device |
| CN109251357B (en) * | 2017-07-14 | 2021-03-23 | 上海胜华电气股份有限公司 | Novel moisture-proof magnesium oxide cable insulating material and preparation method thereof |
| CN113583294A (en) * | 2021-07-30 | 2021-11-02 | 大石桥市美尔镁制品有限公司 | High-temperature-resistant high-pressure-resistant moistureproof magnesium oxide for fireproof cable, and preparation method and application thereof |
| CN114188109A (en) * | 2021-12-07 | 2022-03-15 | 辽宁嘉顺科技有限公司 | Preparation method and application of magnesium oxide for high-impedance and high-voltage breakdown prevention mineral insulated cable |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57118070A (en) * | 1981-01-08 | 1982-07-22 | Mitsubishi Electric Corp | Arc resistant material |
| CN101224953A (en) * | 2008-01-30 | 2008-07-23 | 崔承波 | Clean energy-saving magnesia electric melting furnace |
| CN103971786A (en) * | 2013-12-27 | 2014-08-06 | 上海实业振泰化工有限公司 | Electric-grade organic coating high-temperature-resistant insulating magnesia powder for electric ovens and production method of electric-grade organic coating high-temperature-resistant insulating magnesia powder |
| CN104464894A (en) * | 2014-12-15 | 2015-03-25 | 重庆科宝电缆股份有限公司 | Fire-resistant insulated cable containing calcined coal series kaolin |
-
2016
- 2016-06-08 CN CN201610403069.8A patent/CN106057281B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57118070A (en) * | 1981-01-08 | 1982-07-22 | Mitsubishi Electric Corp | Arc resistant material |
| CN101224953A (en) * | 2008-01-30 | 2008-07-23 | 崔承波 | Clean energy-saving magnesia electric melting furnace |
| CN103971786A (en) * | 2013-12-27 | 2014-08-06 | 上海实业振泰化工有限公司 | Electric-grade organic coating high-temperature-resistant insulating magnesia powder for electric ovens and production method of electric-grade organic coating high-temperature-resistant insulating magnesia powder |
| CN104464894A (en) * | 2014-12-15 | 2015-03-25 | 重庆科宝电缆股份有限公司 | Fire-resistant insulated cable containing calcined coal series kaolin |
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| CN106057281A (en) | 2016-10-26 |
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