阅读说明：本技术 一种延长固化毡使用寿命的方法 (Method for prolonging service life of solidified felt ) 是由 付明全 宋杰 徐志群 孙彬 于 2021-09-16 设计创作，主要内容包括：本发明公开一种延长固化毡使用寿命的方法,包括以下步骤：固化毡预处理、制备涂层材料、涂层材料喷涂和涂层二次喷涂,本发明通过对固化毡的表面喷涂涂层材料,可防止硅蒸汽侵蚀固化毡内部和放置固化毡断裂纤维向外部飞散的情况,且涂层材料采用二次喷涂的方式进行使用,继而使得涂层材料与固化毡之间具有很好的附着力,使得其受到循环升温的情况时,不会发生脱落的情况,有效提升固化毡的使用寿命,同时采用多次浸泡以及高压气体冲刷的清洗方式,有效去除固化毡上的灰尘以及纤维屑,使得固化毡的表面能够更好的与涂层材料进行接触。(The invention discloses a method for prolonging the service life of a cured felt, which comprises the following steps: the invention relates to a method for preparing a curing felt, which comprises the steps of curing the felt, preparing a coating material, spraying the coating material and spraying the coating for the second time.)

1. A method of extending the useful life of a cured mat, comprising: the method comprises the following steps:

the method comprises the following steps: cured felt pretreatment

Soaking a prepared curing felt in advance, drying the soaked curing felt by using an oven, drying the cured felt to obtain a dried curing felt, scouring the dried curing felt by using high-pressure gas, blowing off fiber scraps with fractured surfaces, soaking, drying the soaked curing felt by using the oven, drying the soaked curing felt, and cooling the dried curing felt to obtain a cleaned curing felt;

step two: preparation of the coating Material

Stirring and mixing silicon carbide, graphite powder, a curing agent, organic silicon resin and an organic solvent through a reaction kettle, uniformly mixing to obtain a coating material, then filling the coating material into a container, naturally cooling, and cooling for later use;

step three: spraying of coating materials

Uniformly spraying the coating material in the step two on the surface of the cured felt cleaned in the step one by using spraying equipment to obtain a sprayed cured felt, then putting the sprayed cured felt into a drying oven for heating and curing, taking out after heating and curing, naturally cooling, and cooling for later use;

step four: coating secondary spraying

And (4) spraying the coating material in the step (II) on the surface of the solidified felt cooled in the step (III) by using spraying equipment, then putting the solidified felt into an oven for heating and solidifying, taking out the solidified felt after heating and solidifying, naturally cooling the solidified felt, and cooling the solidified felt to obtain the treated solidified felt.

2. The method of extending the useful life of a cured mat of claim 1, wherein: the soaking time in the step one is 20-30 minutes, and the soaking is carried out at normal temperature.

3. The method of extending the useful life of a cured mat of claim 1, wherein: the drying time in the step one is 10-20 minutes, and the drying temperature is 60-70 ℃.

4. The method of extending the useful life of a cured mat of claim 1, wherein: in the second step, the proportion of the silicon carbide, the graphite powder, the curing agent, the organic silicon resin and the organic solvent is 20-30: 10-25: 5-10: 30-40: 20-40.

5. The method of extending the useful life of a cured mat of claim 1, wherein: in the second step, the mixing time is 30 minutes, and the mixing temperature is 40-60 ℃.

6. The method of extending the useful life of a cured mat of claim 1, wherein: the curing temperature in the third step and the curing temperature in the fourth step are both 140 ℃ and 160 ℃.

7. The method of extending the useful life of a cured mat of claim 1, wherein: the curing time in the third step is 3-4 hours.

8. The method of extending the useful life of a cured mat of claim 1, wherein: the curing time in the fourth step is 6-8 hours.

Technical Field

The invention relates to the technical field of curing felts, in particular to a method for prolonging the service life of a curing felt.

Background

The solidified felt is prepared by using PAN-based carbon felt or graphite felt as a base material through the processes of bonding, curing, shaping, carbonizing, high-temperature treatment and the like, and is also called as a solidified carbon felt, the solidified felt after the processing treatment has good shape retentivity, self-supporting property, small specific gravity, no short fiber falling, high surface smoothness, low thermal conductivity, high temperature resistance, good thermal shock resistance (no cracking and no deformation after long-term use), long service life, convenience in mounting and dismounting, and the use temperature can reach 3000 ℃, so that the solidified felt is an ideal novel heat insulation material for high-temperature vacuum equipment and non-oxidation atmosphere high-temperature equipment;

the curing felt is suitable for various furnace types such as a vacuum high-pressure gas quenching furnace, a vacuum sintering furnace, a pressurizing vacuum sintering furnace, a monocrystalline silicon furnace, a polycrystalline silicon furnace, a silicon carbide crystal growth furnace and the like, but in the actual use process, due to the influence of factors such as insufficient vacuum degree of the vacuum furnace, gas corrosion and the like, the curing felt is difficult to oxidize and fall after being used for a long time, so that the heat preservation performance of the curing felt is reduced, the curing felt cannot be normally used, and the production is influenced.

Disclosure of Invention

In order to solve the problems, the invention aims to provide a method for prolonging the service life of a curing felt, which can prevent silicon vapor from corroding the inside of the curing felt and prevent broken fibers of the curing felt from scattering to the outside by spraying a coating material on the surface of the curing felt, and the coating material is used in a secondary spraying manner, so that the coating material and the curing felt have good adhesive force, and the coating material cannot fall off when subjected to cyclic heating, and the service life of the curing felt is effectively prolonged.

In order to realize the purpose of the invention, the invention is realized by the following technical scheme: a method of extending the useful life of a cured mat comprising the steps of:

the method comprises the following steps: cured felt pretreatment

Soaking a prepared curing felt in advance, drying the soaked curing felt by using an oven, drying the cured felt to obtain a dried curing felt, scouring the dried curing felt by using high-pressure gas, blowing off fiber scraps with fractured surfaces, soaking, drying the soaked curing felt by using the oven, drying the soaked curing felt, and cooling the dried curing felt to obtain a cleaned curing felt;

step two: preparation of the coating Material

Stirring and mixing silicon carbide, graphite powder, a curing agent, organic silicon resin and an organic solvent through a reaction kettle, uniformly mixing to obtain a coating material, then filling the coating material into a container, naturally cooling, and cooling for later use;

step three: spraying of coating materials

Uniformly spraying the coating material in the step two on the surface of the cured felt cleaned in the step one by using spraying equipment to obtain a sprayed cured felt, then putting the sprayed cured felt into a drying oven for heating and curing, taking out after heating and curing, naturally cooling, and cooling for later use;

step four: coating secondary spraying

And (4) spraying the coating material in the step (II) on the surface of the solidified felt cooled in the step (III) by using spraying equipment, then putting the solidified felt into an oven for heating and solidifying, taking out the solidified felt after heating and solidifying, naturally cooling the solidified felt, and cooling the solidified felt to obtain the treated solidified felt.

The further improvement lies in that: the soaking time in the step one is 20-30 minutes, and the soaking is carried out at normal temperature.

The further improvement lies in that: the drying time in the step one is 10-20 minutes, and the drying temperature is 60-70 ℃.

The further improvement lies in that: in the second step, the proportion of the silicon carbide, the graphite powder, the curing agent, the organic silicon resin and the organic solvent is 20-30: 10-25: 5-10: 30-40: 20-40.

The further improvement lies in that: in the second step, the mixing time is 30 minutes, and the mixing temperature is 40-60 ℃.

The further improvement lies in that: the curing temperature in the third step and the curing temperature in the fourth step are both 140 ℃ and 160 ℃.

The further improvement lies in that: the curing time in the third step is 3-4 hours.

The further improvement lies in that: the curing time in the fourth step is 6-8 hours.

The invention has the beneficial effects that: this kind of extension solidification felt life's method is through the surface spraying coating material to the solidification felt, can prevent that the inside of silicon steam erosion solidification felt and place the condition that solidification felt fracture fibre scatters to the outside, and coating material adopts the mode of secondary spraying to use, then make coating material and solidification felt between have fine adhesive force, when making it receive the condition of circulation intensification, the condition that can not take place to drop, effectively promote the life of solidification felt, adopt the cleaning methods of soaking many times and high-pressure gas scouring simultaneously, effectively get rid of dust and the fibre bits on the solidification felt.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic flow diagram of the present invention.

Detailed Description

In order to further understand the present invention, the following detailed description will be made with reference to the following examples, which are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.

Example one

In accordance with the illustration of FIG. 1, the present embodiment provides a method for extending the useful life of a cured mat comprising the steps of:

the method comprises the following steps: cured felt pretreatment

Soaking a prepared curing felt in advance, drying the soaked curing felt by using an oven, drying the dried curing felt to obtain a dried curing felt, scouring the dried curing felt by using high-pressure gas, blowing off fiber scraps with fractured surfaces, scouring each surface of the curing felt for 2 times, soaking the cured felt, drying the soaked curing felt by using the oven, and cooling the soaked curing felt after drying to obtain a cleaned curing felt, wherein the soaking time in the first step is 20 minutes, and the soaking is carried out at normal temperature, the drying time in the first step is 20 minutes, and the drying temperature is 60 ℃;

step two: preparation of the coating Material

Stirring and mixing silicon carbide, graphite powder, a curing agent, organic silicon resin and an organic solvent through a reaction kettle, uniformly mixing to obtain a coating material, then pouring the coating material into a container tank, naturally cooling, and cooling for later use, wherein the proportion of the silicon carbide, the graphite powder, the curing agent, the organic silicon resin and the organic solvent in the second step is 30: 10: 5: 30: 25, in the second step, the mixing time is 30 minutes, and the mixing temperature is 60 ℃;

step three: spraying of coating materials

Uniformly spraying the coating material in the step two on the surface of the cured felt cleaned in the step one by using spraying equipment to obtain a sprayed cured felt, then putting the sprayed cured felt into an oven for heating and curing, taking out the cured felt after heating and curing, naturally cooling the cured felt, and cooling the cured felt for later use, wherein the curing temperature in the step three is 140 ℃, and the curing time in the step three is 3 hours;

step four: coating secondary spraying

Spraying the coating material in the step two on the surface of the solidified felt cooled in the step three by using spraying equipment, then putting the solidified felt into an oven for heating and solidifying, taking out the solidified felt after heating and solidifying, naturally cooling the solidified felt, and cooling the solidified felt to obtain a treated solidified felt, wherein the solidifying temperature in the step four is 150 ℃, and the solidifying time in the step four is 8 hours;

example two

In accordance with the illustration of FIG. 1, the present embodiment provides a method for extending the useful life of a cured mat comprising the steps of:

the method comprises the following steps: cured felt pretreatment

Soaking a prepared curing felt in advance, drying the soaked curing felt by using an oven, drying the dried curing felt to obtain a dried curing felt, scouring the dried curing felt by using high-pressure gas, blowing off fiber scraps with fractured surfaces, scouring each surface of the curing felt for 3 times, soaking the cured felt, drying the soaked curing felt by using the oven, and cooling the soaked curing felt after drying to obtain a cleaned curing felt, wherein the soaking time in the first step is 30 minutes, and the soaking is carried out at normal temperature, the drying time in the first step is 15 minutes, and the drying temperature is 70 ℃;

step two: preparation of the coating Material

Stirring and mixing silicon carbide, graphite powder, a curing agent, organic silicon resin and an organic solvent through a reaction kettle, uniformly mixing to obtain a coating material, then pouring the coating material into a container tank, naturally cooling, and cooling for later use, wherein the ratio of the silicon carbide, the graphite powder, the curing agent, the organic silicon resin and the organic solvent in the step two is 20: 20: 10: 30: 20, in the second step, the mixing time is 30 minutes, and the mixing temperature is 50 ℃;

step three: spraying of coating materials

Uniformly spraying the coating material in the step two on the surface of the cured felt cleaned in the step one by using spraying equipment to obtain a sprayed cured felt, then putting the sprayed cured felt into an oven for heating and curing, taking out the cured felt after heating and curing, naturally cooling the cured felt, and cooling the cured felt for later use, wherein the curing temperature in the step three is 160 ℃, and the curing time in the step three is 4 hours;

step four: coating secondary spraying

And (3) spraying the coating material in the step (II) on the surface of the solidified felt cooled in the step (III) by using spraying equipment, then putting the solidified felt into an oven for heating and solidifying, taking out the solidified felt after heating and solidifying, naturally cooling the solidified felt, and cooling the solidified felt to obtain the treated solidified felt, wherein the solidifying temperature in the step (IV) is 160 ℃, and the solidifying time in the step (IV) is 7 hours.

The high temperature resistance effect test was performed on the first and second examples, and the test results are shown in table one:

watch 1

According to the first embodiment and the second embodiment, the coating material is sprayed on the surface of the curing felt, so that the situations that silicon steam erodes the inside of the curing felt and broken fibers of the curing felt are placed and scattered to the outside can be prevented, the coating material is sprayed for the second time, and then the coating material and the curing felt have good adhesive force, so that the coating material and the curing felt cannot fall off when the coating material is subjected to cyclic heating, the service life of the curing felt is effectively prolonged, and meanwhile, the cleaning modes of multiple soaking and high-pressure gas scouring are adopted, so that dust and fiber scraps on the curing felt are effectively removed.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.