CN115677384A - Protection method for refractory material prefabricated part - Google Patents
Protection method for refractory material prefabricated part Download PDFInfo
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- CN115677384A CN115677384A CN202211245980.2A CN202211245980A CN115677384A CN 115677384 A CN115677384 A CN 115677384A CN 202211245980 A CN202211245980 A CN 202211245980A CN 115677384 A CN115677384 A CN 115677384A
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- prefabricated part
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Abstract
The invention discloses a protection method for a refractory material prefabricated part, which is characterized in that an organic coating is sprayed to close an opening air hole on the surface of the prefabricated part after demoulding, and the volatilization speed of water on the surface of the prefabricated part is controlled, so that uniform drying is kept, and the cracking phenomenon generated when the refractory material prefabricated part is baked is reduced; after the coating prepared by the invention is sprayed on the surface of the refractory material prefabricated part, the high-temperature resistance of the prefabricated part can be improved, the permeability of the coating is improved, the coating can better permeate the prefabricated part and is not easy to fall off from the surface of the prefabricated part, and the prefabricated part is prevented from being cracked under high-temperature baking.
Description
Technical Field
The invention relates to the technical field of refractory materials, in particular to a protection method for a refractory material prefabricated part.
Background
The refractory material pouring prefabricated member can be used for manufacturing various building blocks according to the shape of equipment, and can meet the use requirements of special-shaped parts of a kiln. The main process of casting prefabricated parts comprises the steps of manufacturing a mould, forming, maintaining, baking and demoulding, and during the processes of airing, maintaining and baking, all parts of the casting prefabricated parts are inconsistent in moisture evaporation, so that temperature gradient is easily caused to generate internal stress, and the cracking of the prefabricated part products is caused.
Disclosure of Invention
The invention aims to provide a method for reducing cracking of a refractory material prefabricated part, which is characterized in that an organic coating is sprayed to close an opening air hole on the surface of the prefabricated part after demoulding, and the volatilization speed of water on the surface of the prefabricated part is controlled, so that the prefabricated part is uniformly dried, the problems of easy cracking, deformation and the like in the manufacturing process of the conventional refractory material prefabricated part are solved, and the yield, the yield and the economic benefit of a prefabricated part product are improved.
The technical scheme adopted by the invention for realizing the purpose is as follows: a method for the protection of a refractory preform comprising the steps of:
step one, preparing the coating
The raw material components and the added mass percentage are as follows: adding melamine formaldehyde sulfonate accounting for 0.5 percent of the total weight of the solution into an aqueous solution containing 10 percent of polyvinyl alcohol, uniformly stirring, and then adding silica fume accounting for 30 percent of the total weight of the solution to prepare a coating;
step two, spraying and drying
After the prefabricated member is demoulded, the coating prepared in the step one is evenly sprayed on the surface of the prefabricated member, the thickness is 0.5-0.6mm, and then the prefabricated member is dried according to the normal baking process of the prefabricated member.
The organic coating prepared by the invention is sprayed on the surface of the demoulded refractory material prefabricated part, and then the surface is subjected to a baking process, so that the organic coating can better permeate into the prefabricated part, the high-temperature resistance strength is high, the coating belongs to an organic chemical high polymer material, and a formed coating film belongs to a high polymer compound type.
The polyvinyl alcohol is a safe polymer organic matter, has good biocompatibility and is a common safe film forming agent, and a layer of coating film containing a filler and having a protection effect is formed by utilizing the emulsification effect of a surfactant, fully mixing under the condition of intense stirring and highly dispersing in water.
Melamine sulfonic acid formaldehyde is a high molecular surfactant, is used as a high-efficiency water reducing agent, and has the characteristics of good dispersion performance on coating particles and high water reducing rate when used in a mixture. Polar hydrophilic groups in the water reducing agent are directionally adsorbed on the surfaces of coating particles, so that a stable solvated water film is formed on the surfaces of the particles, and the film plays a role in three-dimensional protection, prevents direct contact between particles and plays a role in lubrication between the particles. The water reducing agent is added, so that the sliding capacity among coating particles is improved, the coating can be uniformly mixed by using a small amount of water due to the comprehensive effect of the adsorption dispersion effect, the wetting effect and the lubricating effect of the water reducing agent, the volatilization amount of free water in the material which is changed into water vapor is reduced by reducing the water adding amount of the coating, further, the surface cracks on the surface of the material are reduced, and the surface cracks caused by baking the coating can be effectively avoided by adding a proper amount of the high-efficiency water reducing agent.
The coating-grade wollastonite powder has fine particle size, has good reinforcing property when used as a filler of a coating, can improve the physical and chemical properties and durability of the coating, has good coverage rate and adhesive force, enhances the expansion capability of a product, reduces cracks, can improve the toughness and durability of the coating, can keep the surface of the coating smooth and good glossiness, improves the washing resistance and weathering resistance, and has good uniform coating property and ageing resistance. The coating can obtain better mechanical strength, durability, adhesion and corrosion resistance. The invention has the beneficial effects that: after the coating prepared by the invention is sprayed on the surface of the refractory material prefabricated part, the high-temperature resistance of the prefabricated part can be improved, the permeability of the coating is improved, the coating can better permeate the prefabricated part, the coating is not easy to fall off from the surface of the prefabricated part, air holes are closed, and the prefabricated part is prevented from being cracked easily under high-temperature baking.
Detailed Description
The invention is further described with reference to specific embodiments, without limiting its scope.
Example 1:
adding melamine formaldehyde sulfonate accounting for 0.5 percent of the total weight of the solution into an aqueous solution containing 10 percent of polyvinyl alcohol, uniformly stirring, then adding silica fume accounting for 30 percent of the total weight of the solution to prepare a coating, demolding the prefabricated part, uniformly spraying the coating on the surface of the prefabricated part, wherein the thickness of the prefabricated part is 0.5mm, and drying the prefabricated part according to a normal baking process.
Example 2:
adding melamine formaldehyde sulfonate accounting for 0.5 percent of the total weight of the solution into an aqueous solution containing 10 percent of polyvinyl alcohol, uniformly stirring, adding silica fume accounting for 30 percent of the total weight of the solution to prepare a coating, demolding the prefabricated part, uniformly spraying the coating on the surface of the prefabricated part, wherein the thickness of the prefabricated part is 0.6mm, and drying the prefabricated part according to a normal baking process.
Claims (2)
1. A method for protecting a refractory preform, comprising the steps of:
step one, preparing the coating
The raw material components and the added mass percentage are as follows: adding melamine formaldehyde sulfonate accounting for 0.5 percent of the total weight of the solution into an aqueous solution containing 10 percent of polyvinyl alcohol, uniformly stirring, and then adding silica fume accounting for 30 percent of the total weight of the solution to prepare a coating;
step two, spraying and drying
And (3) after the prefabricated part is demoulded, uniformly spraying the coating prepared in the step one on the surface of the prefabricated part, and drying according to the normal baking process of the prefabricated part.
2. A method for protecting a refractory preform according to claim 1, wherein the thickness of the surface coating applied to the preform in step two is 0.5-0.6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211245980.2A CN115677384A (en) | 2022-10-12 | 2022-10-12 | Protection method for refractory material prefabricated part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211245980.2A CN115677384A (en) | 2022-10-12 | 2022-10-12 | Protection method for refractory material prefabricated part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115677384A true CN115677384A (en) | 2023-02-03 |
Family
ID=85065391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211245980.2A Pending CN115677384A (en) | 2022-10-12 | 2022-10-12 | Protection method for refractory material prefabricated part |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115677384A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008285367A (en) * | 2007-05-18 | 2008-11-27 | Nihon-Prost Co Ltd | Coating film curing and reinforcing agent for mortar or concrete |
| CN102351546A (en) * | 2011-07-01 | 2012-02-15 | 上海彭浦特种耐火材料厂 | Method for resisting cracking of prefabricated components made of magnesia castable caused by baking |
| CN104907488A (en) * | 2015-06-25 | 2015-09-16 | 苏州明志科技有限公司 | Anti-crack sand mold coating |
| CN111333403A (en) * | 2020-03-18 | 2020-06-26 | 山东坊能新动能科学研究院有限公司 | Preparation method and application of phosphorus-magnesium-based cement concrete coating protective material |
-
2022
- 2022-10-12 CN CN202211245980.2A patent/CN115677384A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008285367A (en) * | 2007-05-18 | 2008-11-27 | Nihon-Prost Co Ltd | Coating film curing and reinforcing agent for mortar or concrete |
| CN102351546A (en) * | 2011-07-01 | 2012-02-15 | 上海彭浦特种耐火材料厂 | Method for resisting cracking of prefabricated components made of magnesia castable caused by baking |
| CN104907488A (en) * | 2015-06-25 | 2015-09-16 | 苏州明志科技有限公司 | Anti-crack sand mold coating |
| CN111333403A (en) * | 2020-03-18 | 2020-06-26 | 山东坊能新动能科学研究院有限公司 | Preparation method and application of phosphorus-magnesium-based cement concrete coating protective material |
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