CN103342021A - Preparation method of fire-resistant ceramic silicone rubber composite belt - Google Patents

Abstract

The invention belongs to the technical field of insulating materials for cables, and discloses a preparation method of a water-fire resistant ceramic silicon rubber composite belt, which comprises a glass cloth reinforcing layer and a silicon rubber layer, wherein the silicon rubber layer is prepared from organic silicon mixing rubber and composite ceramic powder, the composite ceramic powder comprises a ceramic blank material and a ceramic glaze material, the ceramic glaze material comprises silicon dioxide, potassium oxide, aluminum oxide, calcium oxide, zinc oxide and magnesium oxide, and the preparation method comprises the steps of preparation of the organic silicon mixing rubber, preparation of the composite ceramic powder, treatment of a silicone-acrylic emulsion of glass cloth and calendaring molding of the composite belt. The method has the advantages of easy operation, high yield and realization of batch production, and the prepared water-fire resistant ceramic silicon rubber composite belt is vitrified to obtain a coating layer with excellent compactness and strength, so that a cable wrapped by the belt can still keep a smooth circuit after being subjected to flame ablation at 650 +/-40 ℃ and spray water for a certain time, and passes a vibration resistance test.

Description

Preparation method of fire-resistant ceramic silicone rubber composite belt

technical field

The invention relates to a method for preparing an insulating material for cables, in particular to a method for preparing a water and fire-resistant wrapping insulating material for fire-resistant cables that can be vitrified under flame conditions to form a hard protective layer.

Background technique

In recent years, fire accidents in public places have occurred frequently in my country. According to relevant data, since the beginning of the 21st century, there have been about 909,000 fires in my country, 10,059 people died, and the direct economic loss was about 6.03 billion yuan. The number of fire accidents in public places has exceeded It accounts for more than 50% of the total number of fire accidents in the country. When a fire accident occurs in a public place, the safety and smoothness of the cable is very important for fire prevention and fire fighting. It can not only win the precious rescue time to the maximum extent, but also greatly reduce the casualties and property losses. Fire-resistant cables refer to the specified fire-resistant performance, which can ensure that the line continues to operate stably for a period of time under flame conditions, so that the power system and signal control system can work normally under flame conditions, and minimize the loss caused by fire. At present, fire-resistant cables at home and abroad mainly include magnesium oxide mineral insulated fire-resistant cables and mica tape-wrapped inorganic-insulated fire-resistant cables. Although mineral insulated fireproof cables have good fire resistance, their manufacturing process is complicated, the production cost is high, the length of production is limited, and the cables are very hard and cannot be bent, the joints are complicated, the construction is very difficult, and it is difficult to be widely used. Although the mica tape wrapping refractory cable has a simple process and unlimited manufacturing length, there is a common disadvantage of the mica tape. After high temperature combustion, the mechanical strength of the mica tape is greatly reduced and becomes brittle. It is easy to pulverize and fall off after being subjected to severe vibration, causing The refractory effect is not good. The mica tape wrapping fire-resistant cable has a simple process, but the mechanical strength of the mica tape is greatly reduced after high-temperature combustion, and it becomes brittle, and it is easy to pulverize and fall off after being subjected to severe vibration, resulting in poor refractory effect.

In recent years, researchers have explored ceramic silicone rubber insulated fire-resistant cables. The ceramic silicone rubber layer will form a hard shell-like porcelain coating after high temperature ablation, which can protect the copper core from being damaged by external force and short circuit. The compactness of the porcelain coating is another important index to evaluate the fire resistance of the cable. Usually the cable will be sprayed with a large amount of water during the fire or fire extinguishing process, while the porcelain coating is usually less dense and easy to contact with water. Penetration can also cause a short circuit.

Contents of the invention

In order to solve the problems in the above-mentioned prior art, the present invention provides a method for preparing a fire-resistant ceramic silicon rubber composite tape, the fire-resistant ceramic silicon rubber composite tape prepared by the method can replace the mica tape for the wrapping process of cables, The prepared fire-resistant cable can still keep the circuit unimpeded after being subjected to flame ablation at 650±40°C and spraying water for a certain period of time, and has passed the vibration resistance test.

The technical scheme adopted in the present invention is:

A method for preparing a water and fire resistant ceramic silicone rubber composite belt, the water and fire resistant ceramic silicon rubber composite belt includes a glass cloth reinforcement layer and a silicone rubber layer, the silicone rubber layer is made of a water and fire resistant ceramic silicone rubber composition, the The water and fire-resistant ceramic silicone rubber composition includes organosilicon rubber compound and composite ceramic powder, and the organosilicon rubber compound includes vinyl-terminated methyl vinyl silicon raw rubber, methyl vinyl silicon raw rubber, hydrogen-containing silicone oil and Fumed white carbon black; the composite ceramic powder includes a ceramic body material and a ceramic glaze material, and the ceramic body material includes by parts by weight:

The ceramic glaze body material includes silicon dioxide, potassium oxide, aluminum oxide, calcium oxide, zinc oxide and magnesium oxide;

Described preparation method comprises the steps:

A. Mix vinyl-terminated methyl vinyl silicone raw rubber, methyl vinyl silicone raw rubber, hydrogen-containing silicone oil and part of fumed silica, knead, and then add the remaining fumed silica in 2-4 times, Mix everything evenly and form a dough, heat to 85°C-95°C and continue kneading for 2-3 hours, then raise the temperature to 145°C-155°C, vacuumize and knead for 0.5-1 hour, take out and naturally cool to obtain silicone rubber compound; Among them, the amount of fumed silica added each time is preferably basically the same amount;

B. Mix the ceramic body material and ceramic glaze body material in the weighed composite ceramic powder, heat up to 120-130° C., stir and mix, and grind for 0.5-1.5 hours to obtain composite ceramic powder;

C. Take the silicone rubber compound and part of the composite ceramic powder, mix and knead, then add the remaining composite ceramic powder in 2-4 times, mix them all into a ball, heat to 65-75°C and continue kneading for 2-3 hours. Then heat up to 135-145°C, vacuumize and continue kneading for 0.5-1 hour, take it out to cool naturally, slice and pass through several times, add vulcanizing agent and knead for 0.5-1 hour to obtain a fire-resistant ceramic silicone rubber composition; It is better to add the same amount of ceramic powder each time;

D. Prepare the silicone acrylic emulsion into a dilution solution with a solid content of 3%-10%, treat the glass cloth by dipping, brushing or spraying, and dry it at a temperature of 70-90°C;

E. Calender and compound the fire-resistant ceramic silicone rubber composition and glass cloth treated with silicone-acrylic emulsion, then bake and vulcanize at 115-125°C for 10-20min, and cut to obtain the fire-resistant ceramic silicone rubber composite tape.

The water and fire resistant ceramic silicone rubber composite belt prepared by the present invention realizes the adjustment of the melting process of the composite ceramic powder and the performance of the final porcelain product by adjusting the amount and composition of the ceramic body material and the ceramic glaze body material in the composite ceramic powder, wherein the ceramic After the glaze material is melted at high temperature, it can fill the gaps in the porcelain, so that the density and strength of the porcelain can be improved, so as to improve the fire and water resistance and vibration resistance of the fire-resistant ceramic silicon rubber composite belt after porcelain, and at the same time adjust the process to improve The dispersion of the powder makes the composite tape have higher strength and toughness, which meets the performance requirements of the fire-resistant cable for the wrapped composite tape.

Preferably, the ceramic glaze material includes by weight parts:

Preferably, in the composite ceramic powder, the weight ratio of the ceramic body material to the ceramic glaze body material is 1: (0.65-0.7).

In the preparation method of the present invention, there is no special limitation on the silicone rubber compound, the composite ceramic powder can be uniformly dispersed in the organic silicon rubber compound, and the composite tape prepared by the composite ceramic powder and the organic silicon rubber compound can , the organosilicon compound decomposes and produces silica particles, which together with the composite ceramic powder are vitrified to form a protective layer to achieve waterproof and fire resistance. In order to meet the requirements of the wrapped cable, the composition of the organosilicon compound can be adjusted And adjust the flexibility and strength of the final composite tape in proportion.

Preferably, the silicone rubber compound comprises in parts by weight:

Preferably, the weight ratio of the silicone rubber compound to the composite ceramic powder is (1.5-1):1. More preferably, the weight ratio of the silicone rubber compound to the composite ceramic powder is 1.2:1.

Further preferably, the vinyl content of the vinyl-terminated methyl vinyl silicone raw rubber is 0.2%-0.4%, and the methyl vinyl silicone raw rubber is methyl vinyl with a vinyl content of 0.05%-0.07%. A mixture of silicone raw rubber and methyl vinyl silicone raw rubber with a vinyl content of 0.4%-0.6%, and the hydrogen content of hydrogen-containing silicone oil in the silicone rubber mixture is 0.05%-0.15%.

Based on this, more preferably, the silicone rubber compound includes in parts by weight: 100 parts of vinyl-terminated methyl vinyl silicone rubber, methyl vinyl silicone rubber with a vinyl content of 0.05%-0.07%. 221 parts of rubber, 179 parts of methyl vinyl silicone raw rubber with a vinyl content of 0.4%-0.6%, 25 parts of hydrogen-containing silicone oil, and 330 parts of fumed silica.

Preferably, the silicon content of the silicon-acrylic emulsion in the step D is 3%-15%; more preferably, the silicon content of the silicon-acrylic emulsion is 8%. Wherein the silicon content is the mass percentage of silicon in the solid part.

Preferably, the glass cloth reinforcement layer and the silicone rubber layer of the fire-resistant ceramic silicone rubber composite belt are single-layer or multi-layer respectively.

Beneficial technical effects of the present invention: the method of the present invention is easy to operate, has a high yield, can realize mass production, and prepares fire-resistant ceramic silicon rubber composite tapes with high strength and good flexibility, which can replace mica tapes for fire-resistant Cable manufacturing, no dust pollution during the wrapping process; water and fire-resistant ceramic silicone rubber composite tape contains composite ceramic powder, including ceramic body material and ceramic glaze body material, and the ceramic glaze body material is melted during the porcelainization process to fill the porcelain body gaps, thereby improving the density and strength of the porcelain compound, so that the ceramic shell formed after the composite tape is ablated has good mechanical strength, and the cable wrapped by it is ablated at high temperature, sprayed with water and high-intensity vibration still work normally.

Detailed ways

The water and fire resistant ceramic silicone rubber composite tape of the present invention is made of glass cloth and high strength water and fire resistant ceramic silicon rubber composite to obtain an insulating wrapping material. The specific preparation process is preferably as follows:

A. Knead vinyl-terminated methyl vinyl silicone raw rubber and methyl vinyl silicone raw rubber with different vinyl contents, hydrogen-containing silicone oil and part of fumed silica in a kneader, and then mix the remaining gas phase several times Add white carbon black into the kneader, mix everything evenly and form a mass, then heat to 85°C-95°C and continue mixing for 2-3 hours, then heat up to 145°C-155°C, vacuumize (vacuum degree 0.08-0.09Mpa) and mix Refining for 0.5-1 hour. Take out and cool naturally to obtain high-strength silicone rubber compound. To ensure the strength of the composite tape so that it meets the requirements of continuous wrapping in the cable manufacturing process, the tensile strength and tear strength of the compound rubber itself, as well as the dispersion and compatibility of the subsequently added ceramic powder in it, are key factors.

The preferred weight ratio of each component of the mixed rubber of the present invention is 100 parts of vinyl-terminated methylvinyl silicon raw rubber with a vinyl content of 0.2%-0.4% (mass): 200-250 parts of a vinyl content of 0.05 %-0.07% (mass) of methyl vinyl silicone rubber: 150-200 parts of methyl vinyl silicone rubber with a vinyl content of 0.4%-0.6% (mass): 20-30 parts of a hydrogen content of 0.05% -0.15% (mass) of hydrogen-containing silicone oil: 300-360 parts of fumed silica; the molecular weight of vinyl-terminated methyl vinyl silicone raw rubber and methyl vinyl silicone raw rubber is preferably 600,000-800,000, containing The viscosity of hydrogen silicone oil is preferably 50-1000mPa·s. A small amount of hydroxy silicone oil can also be added to the formulation to further increase the tensile strength of the compound. During the mixing process, the average fraction of fumed silica is added evenly (generally 3-5 times) to ensure its uniform dispersion and reinforcing effect in the raw silica gel.

B, the composite ceramic powder in the embodiment of the present invention comprises ceramic body material and ceramic glaze body material, and described ceramic body material comprises the following components in parts by weight: 100 parts of silicon dioxide, 42-47 parts of boron oxide parts, 25-30 parts of zirconia, 16-21 parts of aluminum oxide, 2-5 parts of strontium oxide; the ceramic glaze material preferably includes the following components in parts by mass: 100 parts of silicon dioxide, 22 parts of potassium oxide -25 parts, 53-58 parts of aluminum oxide, 40-45 parts of calcium oxide, 6-8 parts of zinc oxide, 4-7 parts of magnesium oxide. In the composite ceramic powder, the weight ratio of the ceramic body material to the ceramic glaze body material is 1: (0.65-0.7).

Wherein, part of the oxides in the ceramic glaze material can be added through mineral raw materials containing the oxides to reduce costs, for example, silicon dioxide is added through quartz sand, magnesium oxide is added through talc, potassium oxide is added through potassium feldspar, Alumina is added through kaolin, etc., and the amount of the oxide after conversion can meet the ratio. Specifically, the following preferred feeding methods can be used:

Take 6-8 parts of ZnO, 40-45 parts of CaO, add 13-22 parts of talc powder (containing 31.8% of MgO, 63.2% of SiO ₂ , both are mass fractions), which is equivalent to adding 4-7 parts of MgO, 8-14 parts SiO ₂ ; adding 133-142 parts of potassium feldspar (containing 64.7% of SiO ₂ , 18.4% of Al ₂ O ₃ , and 16.9% of K ₂ O, both in mass fraction), is equivalent to adding 22-24 parts of K ₂ O, 86- 92 parts of SiO ₂ , 24-26 parts of Al ₂ O ₃ , and the total number of parts of SiO ₂ in talc and potassium feldspar is 100 parts, then add Al ₂ O ₃ to make the number of parts reach 53-58 parts, said Potassium feldspar is ground into powder and then added. After mixing, a ceramic glaze body material is obtained. A small amount of crystal water contained in the mineral can be decomposed and removed, which has little influence on the material performance.

Add the weighed ceramic body material and ceramic glaze body material into a high-speed mixer and raise the temperature to 120-130°C and stir and mix evenly under the condition of emptying, so that a small amount of crystal water introduced into the ceramic glaze body material is decomposed and removed, and then Grind in a ball mill for 0.5-1.5 hours, and sieve, preferably composite ceramic powder with a particle size of 10-30 μm. The selection of ceramic powder is very important for the vitrification degree of the composite tape under flame conditions, the hardness after vitrification, compactness, water spray resistance and vibration resistance.

C. Knead high-strength silicone rubber and some composite ceramic powder in a kneader, and then add the remaining composite ceramic powder to the kneader in several times (2-4 times are appropriate), mix them all into a group, and then add Continue mixing for 2-3 hours at 65-75°C, then raise the temperature to 135-145°C, vacuumize (vacuum degree 0.08-0.09Mpa) and continue mixing for 0.5-1 hour, take it out and let it cool naturally, slice it on the open mill Pass several times (generally 3-5 times), add vulcanizing agent and knead for 0.5-1 hour to obtain water and fire resistant ceramic silicone rubber composition. When kneading, the composite ceramic powder is evenly added in several times according to the average amount, which is more conducive to its full dispersion in the rubber compound, and can improve the strength and toughness of the final composite tape. The vulcanizing agent is selected from 2,5-dimethyl-2,5-bis(tert-butyl peroxy)hexane, bis-(2,4-dichlorobenzoyl) peroxide, bis(4-methyl peroxide) benzoyl), dibenzoyl peroxide, tert-butyl peroxybenzoate, 1,1-bis(tert-butylperoxy)-3,3,5-trimethylcyclohexane, 1, One or several kinds of 1-bis(tert-butylperoxy)cyclohexane can be added in a conventional amount.

D. Prepare the silicone-acrylic emulsion into a dilution solution with a solid content of 3%-10% (mass), treat the glass cloth by dipping, brushing or spraying, and dry it at a temperature of 70-90°C. The silicon content of silicon-acrylic emulsion is preferably 3%-15% (mass), and the test proves that the best silicon content is 8%. A certain silicon content improves the hydrophobicity, water resistance, electrical insulation and resistance of the treated glass cloth. Aging performance. Treating glass cloth with silicone acrylic emulsion further improved the tensile strength and tear strength of the composite tape.

E. Composite the fire-resistant ceramic silicone rubber composition and the glass cloth treated with silicone acrylic emulsion through calendering process. When compounding, the silicone rubber layer and the glass cloth reinforcement layer can be combined into a double-layer structure or alternately laminated into a multi-layer structure. After pressing, it is baked and vulcanized at 115-125°C for 10-20 minutes, and finally cut into required widths to obtain water and fire-resistant ceramic silicone rubber composite tapes.

Example 1

Preparation of High Strength Silicone Compound

Weigh 120 g of vinyl-terminated methyl vinyl silicone raw rubber with a vinyl content of 0.28% (mass) and a molecular weight of 700,000, and 265 g of methyl vinyl silicone rubber with a vinyl content of 0.06% (mass) and a molecular weight of 800,000 215g of methyl vinyl silicone rubber with a vinyl content of 0.50% (mass) and a molecular weight of 600,000, 30g of hydrogen-containing silicone oil with a hydrogen content of 0.1% (mass) and a viscosity of 100mPa·s, and 96g of fumed silica in a kneader After kneading into a group, add 100g of fumed silica in three times each time, after mixing them all into a group, raise the temperature to 90°C and continue kneading for 2.5h, then raise the temperature to 150°C to vacuumize (vacuum degree 0.08-0.09MPa) and mix Refined for 0.5 hour, took out and cooled naturally to obtain high-strength silicone rubber compound.

A vulcanizing agent was added to the high-strength silicone compound to make a 2mm-thick sheet and tested after vulcanization. The tensile strength was 11MPa, the elongation at break was 500%, the tear strength was 63kN/m, and the hardness was shoreA56.

Example 2

Preparation of Composite Ceramic Powder

The composite ceramic powder in this embodiment includes ceramic green body material and ceramic glaze body material. Weigh 100g of silicon dioxide, 45g of boron oxide, 30g of zirconium oxide, 20g of aluminum oxide and 3g of strontium oxide, and mix them to obtain 198g of ceramic green body material.

Weigh 8g ZnO, add 42g CaO, add 20g talc powder (containing MgO 31.8%, SiO ₂ 63.2%, both are mass fractions), which is equivalent to adding 6g MgO and 13g SiO ₂ ; add 134g potassium feldspar (containing SiO ₂ 64.7 %, Al ₂ O ₃ 18.4%, K ₂ O 16.9%, both are mass fractions), which is equivalent to adding 23g K ₂ O, 87g SiO ₂ , 24g Al ₂ O ₃ , then SiO ₂ in talc powder and potassium feldspar The total mass is 100g, then add 31g Al ₂ O ₃ to make the total mass of Al ₂ O ₃ reach 55g, the potassium feldspar is ground into powder and then added, after mixing evenly, 235g ceramic glaze body material is obtained, wherein the oxide The total mass of 234g.

Take 185g of ceramic body material and 123g of ceramic glaze material (the total mass of oxides is 122.5g) in a high-speed mixer and heat up to 120°C and mix and stir for 1h under the condition of venting to remove a small amount of crystal water, then Grind in a ball mill for 1 hour, and sieve to obtain composite ceramic powder with a particle size of 10-30 μm.

Example 3

Treatment of glass cloth

Weigh 110g of silicon acrylic emulsion with a silicon content of 8% (mass) and a solid content of 45% (mass), dilute it with 890g of water, and use the diluted silicon acrylic emulsion to treat the glass cloth by dip coating, and then place it in an oven for 80 Bake at ℃ for 8 minutes.

Example 4

Preparation of Water and Fire Resistant Ceramic Silicone Rubber Composite Tape

Weigh 900g of the high-strength silicone rubber compound prepared in Example 1, and 188g of the composite ceramic powder prepared in Example 2, in a kneader, knead into agglomerates and then add 188g of the composite ceramic powder prepared in Example 2 three times each time Powder, after mixing all the powder into a ball, raise the temperature to 70°C and continue kneading for 2.5h, then raise the temperature to 140°C and vacuumize (vacuum degree 0.08-0.09MPa) and knead for 0.5h, take it out and cool it naturally, slice it and pass it on the mill 3-5 times, add 20 g of bis(4-methylbenzoyl) peroxide, and knead for 0.5 h to obtain a fire-resistant ceramic silicone rubber composition.

The fire-resistant ceramic silicone rubber composition is placed on a calender, and the fire-resistant ceramic silicone rubber composition is single-sidedly rolled on the glass cloth treated in Example 3 through a calendering process, and baked and vulcanized at 120°C for 15 minutes in a drying tunnel to obtain a single Water and fire-resistant ceramic silicone rubber composite tape reinforced by surface glass cloth, the thickness of the composite tape is 0.35mm.

The general test method in this field is used to test the performance of the obtained water and fire resistant ceramic silicon rubber composite tape, and the electric strength of the water and fire resistant ceramic silicon rubber composite tape is measured to be greater than or equal to 25kV/mm, and the volume resistivity is greater than or equal to 2×10 ¹¹ Ω·cm ³ , the tensile strength is greater than or equal to 60N/10mm, which meets the requirements of the wrapping process in the cable manufacturing process.

The fire-resistant cable is prepared by wrapping the fire-resistant ceramic silicone rubber composite tape. The specific method is: on the wrapping machine, the glass cloth side of the fire-resistant ceramic silicon rubber composite tape faces the copper conductor side, so that the cross-sectional area is 38mm Carry out 1/2 lap winding on the copper conductor of ² , after stacking 3 layers, get the refractory layer, then extrude on the refractory layer to form a 4.0mm thick polyethylene resin insulating layer, get the insulated wire core, take 3 strands of insulated wire The core is stranded, and then the outer sheath is extruded to obtain a fire-resistant cable.

According to the British standard BS6387:1994, the fire-resistant cable is tested for fire resistance, water fire resistance and vibration resistance. Specifically, during the test, the energized voltage of the fire-resistant cable is 450/750V. After 3 hours of corrosion, the circuit is still intact and can be energized normally, meeting the Class C fire resistance standard, and no harmful gas is released during the combustion process; Add 0.25L/m ² ·s spray water near the cable for 15 minutes, that is, the cable can still maintain the integrity of the circuit and can be powered on normally after the flame burning at 650±40°C and the spray water for 15 minutes, and pass the water and fire resistance test; In the vibration resistance test, the energized fire-resistant cable was subjected to flame ablation at 750±40°C and mechanical shock vibration for 15 minutes. The circuit was intact without damage, and it could be energized normally, meeting the Y-level vibration resistance standard.

The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field of the present invention, without departing from the concept of the present invention, some simple deduction or replacement can be made, which should be regarded as belonging to the protection scope of the present invention.

Claims (9)

1. a preparation method of water and fire resistant ceramic silicon rubber composite belt, described water and fire resistant ceramic silicon rubber composite belt comprises glass cloth reinforcing layer and silicon rubber layer, and described silicon rubber layer is made by water and fire resistant ceramic silicon rubber composition, The water and fire resistant ceramic silicone rubber composition includes organosilicon rubber compound and composite ceramic powder, and is characterized in that: the organosilicon rubber compound includes vinyl-terminated methyl vinyl silicon raw rubber, methyl vinyl silicon raw rubber glue, hydrogen-containing silicone oil and fumed white carbon black; the composite ceramic powder includes a ceramic body material and a ceramic glaze body material, and the ceramic body material includes by parts by weight:

The ceramic glaze body material includes silicon dioxide, potassium oxide, aluminum oxide, calcium oxide, zinc oxide and magnesium oxide; Described preparation method comprises the steps: A. Mix vinyl-terminated methyl vinyl silicone raw rubber, methyl vinyl silicone raw rubber, hydrogen-containing silicone oil and part of fumed silica, knead, and then add the remaining fumed silica in 2-4 times, Mix everything evenly and form a dough, heat to 85°C-95°C and continue kneading for 2-3 hours, then raise the temperature to 145°C-155°C, vacuumize and knead for 0.5-1 hour, take out and naturally cool to obtain silicone rubber compound; B. Mix the ceramic body material and the ceramic glaze body material in the weighed composite ceramic powder, heat up to 120-130° C., stir and mix, and grind for 0.5-1.5 hours to obtain a composite ceramic powder; C. Take the silicone rubber compound and part of the composite ceramic powder, mix and knead, then add the remaining composite ceramic powder in 2-4 times, mix them all into a ball, heat to 65-75°C and continue kneading for 2-3 hours. Then raise the temperature to 135-145°C, vacuumize and continue kneading for 0.5-1 hour, take it out and cool it naturally, slice it and carry out thin pass several times, add vulcanizing agent and knead for 0.5-1 hour to obtain a fire-resistant ceramic silicone rubber composition; D. Prepare the silicone acrylic emulsion into a dilution solution with a solid content of 3%-10%, treat the glass cloth by dipping, brushing or spraying, and dry it at a temperature of 70-90°C; E. Calender and compound the fire-resistant ceramic silicone rubber composition and the glass cloth treated with silicone acrylic emulsion, and then bake and vulcanize at 115-125° C. for 10-20 minutes to obtain a fire-resistant ceramic silicone rubber composite belt. 2. The preparation method of the fire-resistant ceramic silicone rubber composite belt according to claim 1, characterized in that: the ceramic glaze material comprises in parts by weight: 3. The preparation method of the fire-resistant ceramic silicone rubber composite tape according to claim 1, characterized in that: in the composite ceramic powder, the weight ratio of the ceramic body material and the ceramic glaze body material is 1: (0.65～0.7 ). 4. The method for preparing the fire-resistant ceramic silicone rubber composite tape according to any one of claims 1-3, characterized in that: the weight ratio of the silicone compound rubber to the composite ceramic powder is (1-1.5): 1. 5. The method for preparing the fire-resistant ceramic-silicon-rubber composite belt according to any one of claims 1-3, characterized in that: the silicone rubber compound comprises in parts by weight:

6. The preparation method of the fire-resistant ceramic silicone rubber composite belt according to claim 5, characterized in that: the vinyl content of the vinyl-terminated methyl vinyl silicone raw rubber is 0.2%-0.4%, and the Methyl vinyl silicone raw rubber is a mixture of methyl vinyl silicone raw rubber with a vinyl content of 0.05%-0.07% and a methyl vinyl silicon raw rubber with a vinyl content of 0.4%-0.6%. The hydrogen content of the hydrogen-containing silicone oil in the rubber compound is 0.05%-0.15%. 7. The preparation method of the fire-resistant ceramic silicone rubber composite belt according to claim 6, characterized in that: the silicone rubber compound comprises in parts by weight: 100 parts of vinyl-terminated methyl vinyl silicone raw rubber , 221 parts of methyl vinyl silicone raw rubber with a vinyl content of 0.05%-0.07%, 179 parts of methyl vinyl silicone raw rubber with a vinyl content of 0.4%-0.6%, 25 parts of hydrogen-containing silicone oil, and fumed white carbon Black 330 copies. 8. The method for preparing the water and refractory ceramic silicone rubber composite belt according to claim 1, characterized in that: the silicon content of the silicon-acrylic emulsion in the step D is 3%-15%. 9. according to the preparation method of claim 1 or 2 described fire-resistant ceramic silicon-rubber composite tapes, it is characterized in that: the glass cloth reinforced layer and the silicon rubber layer of described fire-resistant ceramic-silicone rubber composite tapes are single-layer or multilayer respectively layer.