A filler material for a muffler and a method of making

Abstract

The application relates to a filling material for a muffler and a preparation method, and belongs to the technical field of muffling materials. The filling material is mixed by perlite and foamed ceramics, the particle size of the foamed ceramics is 2-3 mm, and the weight content of the foamed ceramics is greater than 50%. The filling material for the muffler and the preparation method mix the perlite and the foamed ceramics. Since the particle size of the foamed ceramics is small, the foamed ceramics can be filled into the gaps of the perlite, the filling effect of the muffling material is good, the gap between adjacent filling materials is small, the muffling effect is good, and since the filling effects of all parts of the muffling wall body are consistent, the muffling effects of all parts of the filling wall body are uniform.

Description

Technical Field

[0001] A filling material for mufflers and its preparation method belong to the field of sound-absorbing material technology. Background Technology

[0002] In industrial production, mechanical equipment is commonly used, and the operation of this equipment generates significant noise. Prolonged exposure to such environments can negatively impact health. Therefore, sound-absorbing walls are necessary to isolate noise transmission from the exterior of noisy workshops.

[0003] Ambient walls are typically composed of several sound-absorbing modules, each filled with sound-absorbing material to prevent noise transmission. The sound-absorbing effect of a sound-absorbing wall is mainly influenced by the sound-absorbing material used, thus determining its overall effectiveness. Currently, small particles are commonly used to fill the sound-absorbing material. However, the inventors discovered that the lack of standardized sound-absorbing materials leads to uneven sound absorption, meaning different parts of the wall have different sound-absorbing effects, which significantly impacts the overall sound absorption of the wall. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a filling material and preparation method for a silencer that has good sound absorption effect and can ensure uniform sound absorption effect in all parts of the wall after filling.

[0005] The technical solution adopted by the present invention to solve its technical problem is: the filling material for the muffler is composed of perlite and foamed ceramic, wherein the particle size of the foamed ceramic is 2-3mm and the weight content of the foamed ceramic is greater than 50%.

[0006] A method for preparing a filling material for a muffler includes the following steps:

[0007] S1 mixes ilmenite topsoil, ilmenite tailings, and walnut shell powder to form mixture A, wherein the weight ratio of each component in mixture A is: 4-6 parts ilmenite topsoil, 3-4 parts ilmenite tailings, and 0.3-0.5 parts silicon carbide powder.

[0008] S2 mixes wollastonite, limestone, silicon carbide, and foam stabilizer to form mixture B, wherein the weight ratio of each component in mixture B is: foam stabilizer 0.1-0.3 parts, wollastonite 1-1.5 parts, limestone 0.5-1 parts, and walnut shell powder 0.2-0.3 parts.

[0009] S3 mixes mixture A and mixture B to form mixture C;

[0010] S4. Mixture C is placed into the kiln furniture with fiber paper, the kiln furniture is placed into the kiln, and the kiln is heated to the highest temperature of 1150-1170℃ within 10 hours to form a rough board, wherein the temperature is held for 30 minutes each at 300℃, 900℃ and the highest temperature.

[0011] After the S5 kiln cools down, the raw slabs are cut into foamed ceramics with a particle size of 2-3mm.

[0012] S6 thoroughly mixes foamed ceramics with perlite.

[0013] Preferably, in step S1, the ilmenite surface soil is sieved through a 20-mesh sieve, the ilmenite tailings through a 200-mesh sieve, the silicon carbide powder through a 1500-mesh sieve, the wollastonite through a 200-mesh sieve, the limestone through a 200-mesh sieve, and the walnut shell powder through a 60-mesh sieve.

[0014] Preferably, in step S1, the ilmenite surface soil, ilmenite tailings, and walnut shell powder are mixed in a ballless high-speed mill for 2-3 minutes.

[0015] Preferably, in step S2, wollastonite, limestone, silicon carbide, and foam stabilizer are mixed in a ballless high-speed mill for 2-3 minutes.

[0016] Preferably, the stabilizer is zinc oxide or fluorite.

[0017] Preferably, in step S3, mixture A and mixture B are mixed in a ballless high-speed mill for 2-3 minutes.

[0018] Compared with the prior art, the beneficial effects of this invention are:

[0019] The filling material and preparation method for this silencer mixes perlite and foamed ceramic. Due to the small particle size of the foamed ceramic, it can fill the gaps in the perlite, resulting in good filling effect of the sound-absorbing material. This ensures that the gaps between adjacent filling materials are small, thereby ensuring good sound absorption. Furthermore, since the filling effect is consistent in all parts of the sound-absorbing wall, the sound absorption effect of each part of the filling wall can be guaranteed to be uniform. Detailed Implementation

[0020] The present invention will be further described below with reference to specific embodiments. However, those skilled in the art should understand that the present invention necessarily exceeds these limited embodiments. Some equivalent alternatives or common means will not be described in detail here, but still fall within the protection scope of this application.

[0021] Example 1

[0022] A filling material for silencers is composed of perlite and foamed ceramics, wherein the foamed ceramics have a particle size of 2-3 mm and a weight content greater than 50%. The 2-3 mm particle size and greater than 50% weight content of the foamed ceramics, when mixed with perlite, allow the foamed ceramics to penetrate into the gaps within the perlite, ensuring small gaps between adjacent sound-absorbing materials after filling. This results in uniform sound absorption and good sound insulation performance within the wall structure.

[0023] A method for preparing a filling material for a muffler includes the following steps:

[0024] S1 mixes ilmenite surface soil, ilmenite tailings and walnut shell powder in a ballless high-speed mill for 2.5 min to form mixture A, wherein the weight ratio of each component in mixture A is: 5 parts ilmenite surface soil, 3.5 parts ilmenite tailings and 0.4 parts silicon carbide powder.

[0025] Among them, the surface soil of ilmenite passes through a 20-mesh sieve, the tailings of ilmenite passes through a 200-mesh sieve, and the walnut shell powder passes through a 60-mesh sieve.

[0026] S2 mixes wollastonite, limestone, silicon carbide, and foam stabilizer in a ballless high-speed mill for 2.5 min to form mixture B, wherein the weight ratio of each component in mixture B is: foam stabilizer 0.2 parts, wollastonite 1.2 parts, limestone 0.8 parts, and walnut shell powder 0.25 parts.

[0027] Among them, silicon carbide powder passes through a 1500-mesh sieve, wollastonite passes through a 200-mesh sieve, and limestone passes through a 200-mesh sieve.

[0028] S3 mixes mixture A and mixture B in a ballless high-speed mill for 2-3 minutes to form mixture C;

[0029] S4. Mixture C is placed into the kiln furniture lined with fiber paper. The kiln furniture is placed into the kiln. The kiln is heated to 1160℃ within 10 hours to form a rough plate. The plate is held at 300℃, 900℃ and 1160℃ for 30 minutes each.

[0030] After the S5 kiln cools down, the raw slabs are cut into foamed ceramics with a particle size of 2-3mm.

[0031] S6 thoroughly mixes foamed ceramics with perlite.

[0032] Example 2

[0033] A method for preparing a filling material for a muffler includes the following steps:

[0034] S1 mixes ilmenite surface soil, ilmenite tailings and walnut shell powder in a ballless high-speed mill for 2 minutes to form mixture A, wherein the weight ratio of each component in mixture A is: 4 parts ilmenite surface soil, 3 parts ilmenite tailings and 0.3 parts silicon carbide powder.

[0035] Among them, the surface soil of ilmenite passes through a 20-mesh sieve, the tailings of ilmenite passes through a 200-mesh sieve, and the walnut shell powder passes through a 60-mesh sieve.

[0036] S2 mixes wollastonite, limestone, silicon carbide, and foam stabilizer in a ballless high-speed mill for 2 minutes to form mixture B, wherein the weight ratio of each component in mixture B is: foam stabilizer 0.1 parts, wollastonite 1 part, limestone 0.5 parts, and walnut shell powder 0.2 parts.

[0037] Among them, silicon carbide powder passes through a 1500-mesh sieve, wollastonite passes through a 200-mesh sieve, and limestone passes through a 200-mesh sieve.

[0038] S3 mixes mixture A and mixture B in a ballless high-speed mill for 2 minutes to form mixture C;

[0039] S4. Mixture C is placed into the kiln furniture with fiber paper, the kiln furniture is placed into the kiln, and the kiln is heated to the highest temperature of 1150℃ within 10 hours to form a rough board, wherein the temperature is held for 30 minutes each at 300℃, 900℃ and the highest temperature.

[0040] After the S5 kiln cools down, the raw slabs are cut into foamed ceramics with a particle size of 2-3mm.

[0041] S6 thoroughly mixes foamed ceramics with perlite.

[0042] Example 3

[0043] A method for preparing a filling material for a muffler includes the following steps:

[0044] S1 mixes ilmenite surface soil, ilmenite tailings and walnut shell powder in a ballless high-speed mill for 3 minutes to form mixture A, wherein the weight ratio of each component in mixture A is: 6 parts ilmenite surface soil, 4 parts ilmenite tailings and 0.5 parts silicon carbide powder.

[0045] Among them, the surface soil of ilmenite passes through a 20-mesh sieve, the tailings of ilmenite passes through a 200-mesh sieve, and the walnut shell powder passes through a 60-mesh sieve.

[0046] S2 mixes wollastonite, limestone, silicon carbide, and foam stabilizer in a ballless high-speed mill for 3 minutes to form mixture B, wherein the weight ratio of each component in mixture B is: foam stabilizer 0.3 parts, wollastonite 1.5 parts, limestone 1 part, and walnut shell powder 0.3 parts.

[0047] Among them, silicon carbide powder passes through a 1500-mesh sieve, wollastonite passes through a 200-mesh sieve, and limestone passes through a 200-mesh sieve.

[0048] S3 mixes mixture A and mixture B in a ballless high-speed mill for 3 minutes to form mixture C;

[0049] S4. Mixture C is placed into the kiln furniture with fiber paper, the kiln furniture is placed into the kiln, and the kiln is heated to the highest temperature of 1170℃ within 10 hours to form a rough board, wherein the temperature is held for 30 minutes each at 300℃, 900℃ and the highest temperature.

[0050] After the S5 kiln cools down, the raw slabs are cut into foamed ceramics with a particle size of 3mm.

[0051] S6 thoroughly mixes foamed ceramics with perlite.

[0052] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A method for preparing a filling material for a muffler, characterized in that: The filler material is a mixture of perlite and foamed ceramics, wherein the particle size of the foamed ceramics is 2-3 mm and the weight content of the foamed ceramics is greater than 50%. The preparation method includes the following steps: S1 mixes ilmenite topsoil, ilmenite tailings, and walnut shell powder to form mixture A, wherein the weight ratio of each component in mixture A is: 4-6 parts ilmenite topsoil, 3-4 parts ilmenite tailings, and 0.3-0.5 parts silicon carbide powder. S2 mixes wollastonite, limestone, silicon carbide, and foam stabilizer to form mixture B, wherein the weight ratio of each component in mixture B is: foam stabilizer 0.1-0.3 parts, wollastonite 1-1.5 parts, limestone 0.5-1 parts, and walnut shell powder 0.2-0.3 parts. S3 mixes mixture A and mixture B to form mixture C; S4. Mixture C is placed into the kiln furniture with fiber paper, the kiln furniture is placed into the kiln, and the kiln is heated to the highest temperature of 1150-1170℃ within 10 hours to form a rough board, wherein the temperature is held for 30 minutes each at 300℃, 900℃ and the highest temperature. After the S5 kiln cools down, the raw slabs are cut into foamed ceramics with a particle size of 2-3mm. S6 thoroughly mixes foamed ceramics with perlite.

2. The preparation method according to claim 1, characterized in that: The ilmenite surface soil mentioned in step S1 is sieved through a 20-mesh sieve, the ilmenite tailings through a 200-mesh sieve, the silicon carbide powder through a 1500-mesh sieve, the wollastonite through a 200-mesh sieve, the limestone through a 200-mesh sieve, and the walnut shell powder through a 60-mesh sieve.

3. The preparation method according to claim 1, characterized in that: In step S1, the ilmenite surface soil, ilmenite tailings, and walnut shell powder are mixed in a ballless high-speed mill for 2-3 minutes.

4. The preparation method according to claim 1, characterized in that: In step S2, wollastonite, limestone, silicon carbide, and foam stabilizer are mixed in a ballless high-speed mill for 2-3 minutes.

5. The preparation method according to claim 1 or 4, characterized in that: The foam stabilizer is zinc oxide or fluorite.

6. The preparation method according to claim 1, characterized in that: In step S3, mix A and mix B in a ballless high-speed mill for 2-3 minutes.