CN111718201A - High-fiber-content prefabricated part and preparation method thereof - Google Patents
High-fiber-content prefabricated part and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a prefabricated part with high fiber content and a preparation method thereof, and relates to the technical field of metal-based inorganic wear-resistant materials. The composite material comprises the following raw materials in parts by mass: 10-70 parts of aggregate, 10-40 parts of mixed fine powder and 10-40 parts of reinforcing fiber. According to the prefabricated member with high fiber content and the preparation method thereof, the prefabricated member prepared by the invention is formed by filling an inorganic refractory material with high refractoriness by taking the reinforced fiber as a matrix, vibration molding and high-temperature sintering, and has the advantages of excellent ultrahigh wear resistance, erosion resistance, thermal shock resistance and the like; the prefabricated member prepared by the invention is prepared into a finished product after burdening, mixing, vibration forming and drying firing, the prepared prefabricated member contains high fibers, the strength of the prefabricated member is ensured, and the product is suitable for high-temperature wear-resistant parts of various kilns and can ensure the strength required by the prefabricated member.
Description
Technical Field
The invention relates to the technical field of metal-based inorganic wear-resistant materials, in particular to a prefabricated member with high fiber content and a preparation method thereof.
Background
With the development of society, prefabricated parts are widely used in high-temperature thermal kilns, the kilns are devices built by refractory materials and used for sintering products, the kilns are necessary facilities in ceramic forming, and the strength of wear-resistant high-temperature parts of the kilns is required to be ensured in the using process of the kilns, so that the using effect of the kilns is very important.
The prefabricated member in the prior art is generally applied to high-temperature and wear-resistant parts of various high-temperature thermotechnical kilns at present, although the prefabricated member has a good use effect, the main material of the prefabricated member is inorganic oxide, and the problems of low strength and poor wear resistance exist, so that the service life of the high-temperature thermotechnical kiln is unstable, and therefore, the prefabricated member with high fiber content and the preparation method thereof are provided for solving the problems.
Disclosure of Invention
In view of the deficiencies of the prior art, the present invention provides a high fiber content preform and a method for making the same to solve the problems set forth above in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a high-fiber-content prefabricated part comprises the following raw materials in parts by mass: 10-70 parts of aggregate, 10-40 parts of mixed fine powder and 10-40 parts of reinforcing fiber.
A method of making a high fiber content preform comprising the steps of:
s1, preparation of raw materials: weighing aggregate, mixed fine powder and reinforced fiber in sequence according to parts by weight for later use;
s2, preparing a mixed material: sequentially adding the aggregate, the mixed fine powder and the reinforced fiber weighed in the step S1 into an inclined high-speed stirrer for high-speed stirring, performing first-time stirring, adding water after the first-time stirring is completed, and stirring again to obtain a required mixed material for later use;
s3, reverse molding the blank: slowly pouring the mixture prepared in the step S2 into a mould, mounting the mould on a vibration platform, feeding while vibrating, filling the mould, and preparing a required blank for later use;
s4, drying and demolding: naturally drying the filled mold in the step S3, starting demolding operation after drying is finished, and preparing a demolded blank for later use;
s5, firing of blanks: and (5) naturally drying the blank prepared in the step S4, putting the blank into a high-temperature kiln for firing after drying, and taking out the blank after cooling to obtain the preform with high fiber content.
Further optimizing the technical scheme, the aggregate in the step S2 has a particle size of 0.1-3mm, and is made of one or a mixture of at least two of bauxite, kyanite, andalusite, sillimanite, magnesia and flint clay.
Further optimizing the technical scheme, the particle size of the mixed fine powder in the step S2 is 0.001-0.1mm, and the material of the mixed fine powder comprises aggregate material and one or a mixture of at least two of alumina micropowder, pure calcium aluminate cement, silicon carbide and silicon micropowder.
Further optimizing the technical solution, the fiber length of the reinforcing fiber in step S2 is 1-100mm, and the material of the reinforcing fiber may be one or a mixture of at least two of stainless steel, silica, organic fiber and other alloy fiber.
Further optimizing the technical scheme, the first stirring time in the step S2 is 1-3min, the water adding amount in the step S2 is 3-15%, and the second stirring time is 1-5 min.
Further optimizing the technical scheme, the natural drying time in the step S4 is 5-24 h.
Further optimizing the technical scheme, the time for naturally drying again in the step S5 is 10-24h, and the firing temperature of the high-temperature kiln in the step S5 is 1000-1600 ℃.
Compared with the prior art, the invention provides a high-fiber-content prefabricated part and a preparation method thereof, and the prefabricated part has the following beneficial effects:
1. the prefabricated member prepared by the invention is formed by filling an inorganic refractory material with high refractoriness by using the reinforced fiber as a matrix, vibration molding and high-temperature sintering, and has the advantages of excellent ultrahigh wear resistance, erosion resistance, thermal shock resistance and the like.
2. The prefabricated member prepared by the invention is subjected to batching, mixing, vibration molding and drying firing to obtain a finished product, the prepared prefabricated member contains high fibers, the strength of the prefabricated member is ensured, and the product is suitable for high-temperature wear-resistant parts of various kilns and can ensure the strength required by the prefabricated member.
Drawings
FIG. 1 is a schematic flow diagram of a high fiber content preform and method of making the same according to the present invention.
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:
referring to fig. 1, a preform with high fiber content comprises the following raw materials in parts by mass: 30 parts of aggregate, 30 parts of mixed fine powder and 40 parts of reinforcing fiber.
A method of making a high fiber content preform comprising the steps of:
s1, preparation of raw materials: weighing aggregate, mixed fine powder and reinforced fiber in sequence according to parts by weight for later use;
s2, preparing a mixed material: sequentially adding the aggregate, the mixed fine powder and the reinforcing fiber weighed in the step S1 into an inclined high-speed stirrer for high-speed stirring, performing primary stirring for 2min, adding water after the primary stirring is finished, wherein the water addition amount is 8%, performing secondary stirring to obtain a required mixed material, wherein the secondary stirring time is 3min, the granularity of the aggregate is 1mm, the aggregate is a mixture of bauxite and kyanite, the granularity of the mixed fine powder is 0.05mm, the mixed fine powder comprises a mixture of the aggregate and alumina micropowder, pure calcium aluminate cement and silicon carbide, the fiber length of the reinforcing fiber is 50mm, and the reinforcing fiber can be a mixture of stainless steel, silicon dioxide and organic fiber for later use;
s3, reverse molding the blank: slowly pouring the mixture prepared in the step S2 into a mould, mounting the mould on a vibration platform, feeding while vibrating, filling the mould, and preparing a required blank for later use;
s4, drying and demolding: naturally drying the filled mold in the step S3, wherein the natural drying time is 12h, starting demolding operation after the drying is finished, and preparing a demolded blank for later use;
s5, firing of blanks: and (4) naturally drying the blank prepared in the step S4 again, wherein the time of natural drying again is 16h, placing the blank into a high-temperature kiln for firing after drying is finished, the firing temperature is 1400 ℃, cooling and taking out to obtain the high-fiber-content prefabricated part, and the high-fiber-content prefabricated part has the thermal shock stability of 1100 ℃, water cooling time of more than or equal to 20 times, normal-temperature wear resistance of less than or equal to 1.0cm3 and normal-temperature compressive strength of more than 200 Mpa.
Example two: referring to fig. 1, a preform with high fiber content comprises the following raw materials in parts by mass: 40 parts of aggregate, 40 parts of mixed fine powder and 20 parts of reinforcing fiber.
A method of making a high fiber content preform comprising the steps of:
s1, preparation of raw materials: weighing aggregate, mixed fine powder and reinforced fiber in sequence according to parts by weight for later use;
s2, preparing a mixed material: sequentially adding the aggregate, the mixed fine powder and the reinforcing fiber weighed in the step S1 into an inclined high-speed stirrer for high-speed stirring, carrying out first-time stirring for 2.5min, adding water after the first-time stirring is finished, wherein the water addition amount is 7%, carrying out second-time stirring to obtain a required mixed material, wherein the second-time stirring is 4min, the granularity of the aggregate is 1.5mm, the aggregate is a mixture of sillimanite and flint clay, the granularity of the mixed fine powder is 0.06mm, the material of the mixed fine powder comprises the mixture of the aggregate and silicon carbide and silicon micropowder, the fiber length of the reinforcing fiber is 40mm, and the material of the reinforcing fiber can be organic fiber for later use;
s3, reverse molding the blank: slowly pouring the mixture prepared in the step S2 into a mould, mounting the mould on a vibration platform, feeding while vibrating, filling the mould, and preparing a required blank for later use;
s4, drying and demolding: naturally drying the filled mold in the step S3, wherein the natural drying time is 12h, starting demolding operation after the drying is finished, and preparing a demolded blank for later use;
s5, firing of blanks: and (5) naturally drying the blank prepared in the step (S4) again for 15h, firing the blank in a high-temperature kiln at 1200 ℃ after drying is finished, cooling and taking out the blank to obtain the high-fiber-content prefabricated member, wherein the thermal shock stability of the high-fiber-content prefabricated member is 1100 ℃, water cooling is carried out for more than or equal to 15 times, the normal-temperature wear resistance is less than or equal to 1.5cm3, and the normal-temperature compressive strength is more than 160 Mpa.
Example three:
referring to fig. 1, a preform with high fiber content comprises the following raw materials in parts by mass: 50 parts of aggregate, 20 parts of mixed fine powder and 30 parts of reinforcing fiber.
A method of making a high fiber content preform comprising the steps of:
s1, preparation of raw materials: weighing aggregate, mixed fine powder and reinforced fiber in sequence according to parts by weight for later use;
s2, preparing a mixed material: sequentially adding the aggregate, the mixed fine powder and the reinforcing fiber weighed in the step S1 into an inclined high-speed stirrer for high-speed stirring, carrying out primary stirring for 1min, adding water after the primary stirring is finished, wherein the water addition amount is 13%, carrying out secondary stirring to obtain a required mixed material, wherein the secondary stirring time is 4min, the granularity of the aggregate is 2.5mm, the aggregate is a mixture of kyanite, andalusite and flint, the granularity of the mixed fine powder is 0.009mm, the mixed fine powder comprises a mixture of aggregate material and pure calcium aluminate cement and silicon micropowder, the fiber length of the reinforcing fiber is 70mm, and the reinforcing fiber can be a mixture of stainless steel and organic fiber for later use;
s3, reverse molding the blank: slowly pouring the mixture prepared in the step S2 into a mould, mounting the mould on a vibration platform, feeding while vibrating, filling the mould, and preparing a required blank for later use;
s4, drying and demolding: naturally drying the filled mold in the step S3, wherein the natural drying time is 20h, demolding operation is started after the drying is finished, and the demolded blank is reserved;
s5, firing of blanks: and (4) naturally drying the blank prepared in the step S4 again, wherein the time of natural drying again is 20h, placing the blank into a high-temperature kiln for firing after drying is finished, the firing temperature is 1400 ℃, cooling and taking out to obtain the high-fiber-content prefabricated part, and the high-fiber-content prefabricated part has the thermal shock stability of 1100 ℃, water cooling time of more than or equal to 12 times, normal-temperature wear resistance of less than or equal to 1.8cm3 and normal-temperature compressive strength of more than 140 Mpa.
Example four:
referring to fig. 1, a preform with high fiber content comprises the following raw materials in parts by mass: 60 parts of aggregate, 25 parts of mixed fine powder and 25 parts of reinforcing fiber.
A method of making a high fiber content preform comprising the steps of:
s1, preparation of raw materials: weighing aggregate, mixed fine powder and reinforced fiber in sequence according to parts by weight for later use;
s2, preparing a mixed material: sequentially adding the aggregate, the mixed fine powder and the reinforcing fiber weighed in the step S1 into an inclined high-speed stirrer for high-speed stirring, carrying out primary stirring for 3min, adding water after the primary stirring is finished, wherein the water addition amount is 15%, carrying out secondary stirring to obtain a required mixed material, wherein the secondary stirring time is 5min, the granularity of the aggregate is 3mm, the aggregate is a mixture of magnesia and flint clay, the granularity of the mixed fine powder is 0.1mm, the material of the mixed fine powder comprises a mixture of the aggregate material and silicon carbide and silicon micropowder, the fiber length of the reinforcing fiber is 90mm, and the material of the reinforcing fiber can be a mixture of stainless steel and other alloy fibers for later use;
s3, reverse molding the blank: slowly pouring the mixture prepared in the step S2 into a mould, mounting the mould on a vibration platform, feeding while vibrating, filling the mould, and preparing a required blank for later use;
s4, drying and demolding: naturally drying the filled mold in the step S3, wherein the natural drying time is 22h, demolding operation is started after the drying is finished, and the demolded blank is reserved;
s5, firing of blanks: and (5) naturally drying the blank prepared in the step (S4) again for 21h, firing the blank in a high-temperature kiln at 1500 ℃ after drying is finished, cooling and taking out the blank to obtain the high-fiber-content prefabricated member, wherein the thermal shock stability of the high-fiber-content prefabricated member is 1100 ℃, the water cooling is carried out for more than or equal to 10 times, the normal-temperature wear resistance is less than or equal to 2.0cm3, and the normal-temperature compressive strength is more than 120 Mpa.
And (4) judging the standard: through comparison of the four embodiments, the best effect is the first embodiment, and therefore, the first embodiment is selected as the best embodiment, and the specific change of the amount also belongs to the protection scope of the technical scheme.
The invention has the beneficial effects that: according to the prefabricated member with high fiber content and the preparation method thereof, the prefabricated member prepared by the invention is formed by filling an inorganic refractory material with high refractoriness by taking the reinforced fiber as a matrix, vibration molding and high-temperature sintering, and has the advantages of excellent ultrahigh wear resistance, erosion resistance, thermal shock resistance and the like; the prefabricated member prepared by the invention is prepared into a finished product after burdening, mixing, vibration forming and drying firing, the prepared prefabricated member contains high fibers, the strength of the prefabricated member is ensured, and the product is suitable for high-temperature wear-resistant parts of various kilns and can ensure the strength required by the prefabricated member.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that 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. The high-fiber-content prefabricated part is characterized by comprising the following raw materials in parts by mass: 10-70 parts of aggregate, 10-40 parts of mixed fine powder and 10-40 parts of reinforcing fiber.
2. A method of making a high fiber content preform comprising the steps of:
s1, preparation of raw materials: weighing aggregate, mixed fine powder and reinforced fiber in sequence according to parts by weight for later use;
s2, preparing a mixed material: sequentially adding the aggregate, the mixed fine powder and the reinforced fiber weighed in the step S1 into an inclined high-speed stirrer for high-speed stirring, performing first-time stirring, adding water after the first-time stirring is completed, and stirring again to obtain a required mixed material for later use;
s3, reverse molding the blank: slowly pouring the mixture prepared in the step S2 into a mould, mounting the mould on a vibration platform, feeding while vibrating, filling the mould, and preparing a required blank for later use;
s4, drying and demolding: naturally drying the filled mold in the step S3, starting demolding operation after drying is finished, and preparing a demolded blank for later use;
s5, firing of blanks: and (5) naturally drying the blank prepared in the step S4, putting the blank into a high-temperature kiln for firing after drying, and taking out the blank after cooling to obtain the preform with high fiber content.
3. The method of claim 2, wherein the aggregate in step S2 has a particle size of 0.1-3mm, and is one or a mixture of at least two of bauxite, kyanite, andalusite, sillimanite, magnesite, and flint clay.
4. The method of claim 2, wherein the mixed fine powder of step S2 has a particle size of 0.001-0.1mm, and the material of the mixed fine powder comprises an aggregate material and one or a mixture of at least two of alumina micropowder, pure calcium aluminate cement, silicon carbide, and silica micropowder.
5. The method of claim 2, wherein the length of the reinforcing fiber in step S2 is 1-100mm, and the material of the reinforcing fiber is one or a mixture of at least two of stainless steel, silica, organic fiber and other alloy fiber.
6. The method of claim 2, wherein the first stirring in step S2 is performed for 1-3min, the water addition in step S2 is performed for 3-15%, and the second stirring is performed for 1-5 min.
7. The method for preparing a preform with high fiber content according to claim 2, wherein the natural drying time in step S4 is 5-24 h.
8. The method as claimed in claim 2, wherein the re-natural drying time in step S5 is 10-24h, and the high temperature kiln firing temperature in step S5 is 1000-1600 ℃.
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