CN117340229B

CN117340229B - Drainage agent and preparation method thereof

Info

Publication number: CN117340229B
Application number: CN202311639815.XA
Authority: CN
Inventors: 王炳朝; 张立锋; 常正钦
Original assignee: Ulanchab Simonding New Technology Development Co ltd
Current assignee: Ulanchab Simonding New Technology Development Co ltd
Priority date: 2023-12-04
Filing date: 2023-12-04
Publication date: 2024-02-13
Anticipated expiration: 2043-12-04
Also published as: CN117340229A

Abstract

The invention provides a drainage agent and a preparation method thereof, which are specially designed for meeting special requirements in a high-temperature casting environment; the drainage agent consists of titanium dioxide nano particles, rare earth oxide coating particles, quartz sand or fused corundum and a high-temperature ceramic adhesive; wherein, the titanium dioxide nano particles account for 5 to 10 weight parts, which not only improves the mechanical property of the drainage agent, but also endows the drainage agent with self-cleaning property, thereby being beneficial to reducing the accumulation of pollutants; the addition amount of the rare earth oxide coating particles is 2 to 5 weight parts, so that the stability and the wear resistance of the drainage agent under the extremely high temperature condition are enhanced; quartz sand or fused corundum is used as a main material, and takes 80 to 85 weight parts, so that the basic drainage function of the drainage agent is ensured; the structural integrity and durability of the product at high temperature are further improved by adding the high-temperature ceramic adhesive; the drainage agent is suitable for various high-temperature casting applications, and is especially suitable for occasions requiring high heat resistance and self-cleaning capability.

Description

Drainage agent and preparation method thereof

Technical Field

The invention relates to the technical field of metallurgical auxiliary materials, in particular to a drainage agent and a preparation method thereof.

Background

The use of a flow diverter is a critical technique in the high temperature casting industry that helps control the flow and cooling of metal during the casting process, thereby improving the quality of the casting. However, existing drainage agents present challenges in high temperature environments, such as susceptibility to contamination, wear, and performance degradation at extreme temperatures.

In particular, conventional drainage agents tend to accumulate dust, grease, and other impurities during high temperature casting, which not only reduce the efficiency of the drainage agent, but may also affect the quality of the cast product. To address this challenge, there is a need for a drainage agent with self-cleaning capability that automatically cleans the surface during use, thereby maintaining its performance and extending its useful life.

In addition, the high temperature environment places higher demands on the stability and wear resistance of the drainage agent material. Drainage materials commonly used in the prior art, such as quartz sand or fused corundum, although performing well in some respects, still suffer from insufficient high temperature resistance and abrasion resistance.

Therefore, it is highly desirable to develop a novel drainage agent.

Disclosure of Invention

The application provides a drainage agent and a preparation method thereof, so as to improve heat resistance and self-cleaning capability.

The application provides a drainage agent, which is prepared from the following raw materials in parts by weight:

5 to 10 parts by weight of titanium dioxide nanoparticles; 2 to 5 parts by weight of rare earth oxide coated particles; 80 to 85 parts by weight of quartz sand or fused corundum; 2 to 5 parts by weight of a high temperature ceramic binder; 0.5 to 2 parts by weight of barium borate particles;

wherein the rare earth oxide coating particles are neodymium oxide or lanthanum oxide coated rare earth oxide coating particles; the high-temperature ceramic adhesive is an aluminosilicate-based high-temperature ceramic adhesive; the titanium dioxide nanoparticles have an average particle diameter of 10 to 50 nanometers; the particle size of the quartz sand or the fused corundum ranges from 100 to 500 micrometers.

The beneficial technical effects of the invention are as follows:

(1) The drainage agent has remarkable high-temperature resistance due to the rare earth oxide coating particles. These particles can remain stable in the high temperature casting environment, thereby increasing the service life of the drainage agent and ensuring continuity and consistency of the casting process.

(2) The titanium dioxide nanoparticles provide self-cleaning properties in the drainage agent. These nanoparticles can help remove dirt and impurities that accumulate on the surface of the drainage agent, reduce the need for cleaning and maintenance, and improve the efficiency of the casting process.

(3) Quartz sand or fused corundum is used as a main material of the drainage agent, and provides necessary mechanical support and abrasion resistance. The addition of these materials ensures that the drainage agent retains its shape and integrity when subjected to continuous high temperatures and mechanical shocks.

(4) The use of the high temperature ceramic binder improves the structural stability of the drainage agent at extreme temperatures. Such adhesives provide excellent bonding properties at high temperatures, helping to maintain the overall consistency and stability of the drainage agent.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other ways than those herein described and similar generalizations can be made by those skilled in the art without departing from the spirit of the application and the application is therefore not limited to the specific embodiments disclosed below.

The first embodiment of the application provides a drainage agent, which is prepared from the following raw materials in parts by weight:

5 to 10 parts by weight of titanium dioxide nanoparticles; 2 to 5 parts by weight of rare earth oxide coated particles; 80 to 85 parts by weight of quartz sand or fused corundum; 2 to 5 parts by weight of a high temperature ceramic binder, wherein the rare earth oxide coating particles are neodymium oxide or lanthanum oxide coated rare earth oxide coating particles; the high temperature ceramic adhesive is an aluminosilicate-based high temperature ceramic adhesive.

Titanium dioxide (TiO 2) nanoparticles are widely used in a variety of applications due to their high stability, non-toxicity and excellent chemical properties. On the nanoscale, these particles exhibit unique physical and chemical properties. In the drainage agent, the titanium dioxide nanoparticles can provide self-cleaning properties. The nano-scale particles are capable of effectively contacting contaminants to aid in the removal of dirt and impurities from the surface by physical action (e.g., micro-scraping). This self-cleaning capability is critical to reduce maintenance and cleaning requirements during high temperature casting.

The titanium dioxide nanoparticles have an average particle diameter of 10 to 50 nanometers. This size range is critical because it directly affects the surface area and reactivity of the particles. At the nanoscale, the performance of titanium dioxide is significantly improved by its increased specific surface area, which means that smaller particles will have more surface to environment interactions, thereby more effectively performing their function, such as removing dirt and impurities during self-cleaning. In addition, the particle size range ensures uniformity and stability of particle distribution, and avoids aggregation problems during high-temperature casting.

Rare earth oxide coated particles, which may be neodymium oxide or lanthanum oxide coated particles, provide excellent high temperature resistance and chemical stability. These coated particles typically have a core-shell structure, the core may be of other materials, and the shell is a rare earth oxide. The core may be a silicate material that has good heat resistance and mechanical strength, making it an ideal core material for high temperature applications. For example, silicate materials with low thermal expansion may provide excellent thermal stability. The core may also be alumina, which is widely used for refractory materials due to its high melting point, good thermal stability and corrosion resistance. It can be used as a core material to enhance the overall high temperature resistance of the particles.

Among the drainage agents, the rare earth oxide coating particles are mainly responsible for enhancing the wear resistance and the high temperature resistance. The outer layer of the rare earth oxide protects the inner core from high temperature and corrosion, and ensures the stability and durability of the drainage agent in extreme environments.

Quartz sand and fused corundum are common refractory materials and have excellent wear resistance and high temperature resistance. These materials act as the main body of the drainage agent, providing the necessary mechanical support and heat resistance. They are subjected to continuous high temperatures and mechanical shocks during the casting process, while maintaining shape and integrity, ensuring smooth progress of the casting process.

The particle size of the quartz sand or the fused corundum ranges from 100 to 500 micrometers. This particle size selection is critical to the basic drainage function of the drainage agent. The larger particle size helps to form a more stable runner during casting, thereby more effectively controlling the flow and cooling of the metal. In addition, quartz sand or fused corundum of this size can maintain its shape and integrity when subjected to continuous high temperatures and mechanical shocks, which is critical to ensure smooth progress of the casting process and quality of the final product. Moreover, the selection of the particle size range also allows for the convenience of screening and handling of the material, ensuring that the manufacturing process of the drainage agent is both economical and efficient.

The aluminosilicate-based high temperature ceramic binder is selected because it provides excellent bonding properties and stability at high temperatures. The role of such binders in drainage agents is to maintain the overall structure of the various particles and powders, especially under high temperature conditions. It ensures that the drainage agent does not disintegrate or break down due to thermal stresses during the casting process.

All of these combinations of materials are carefully selected and proportioned to ensure optimal performance of the drainage agent during high temperature casting. The self-cleaning property of the titanium dioxide nano particles reduces the cleaning and maintenance requirements, the rare earth oxide coating particles increase the wear resistance and high temperature resistance, the quartz sand or the fused corundum provides structural stability, and the high temperature ceramic adhesive maintains the integrity of the drainage agent in extreme environments. The comprehensive effect ensures that the drainage agent provided by the embodiment is excellent in high-temperature casting environment, thereby not only improving the working efficiency, but also optimizing the quality of the final product.

The specific effect of the drainage agent is determined below considering several different weight part combinations. Each combination will affect the properties of the drainage agent, such as heat resistance, self-cleaning ability, structural stability, and abrasion resistance, to varying degrees. The following are several possible combinations:

combination A:

titanium dioxide nanoparticles: 5 parts by weight;

rare earth oxide coated particles: 2 parts by weight;

quartz sand or fused corundum: 85 parts by weight;

high temperature ceramic binder: 5 parts by weight;

this combination will be more focused on maintaining the basic function of the drainage agent, such as providing adequate mechanical support and heat resistance. Less titanium dioxide and rare earth oxide coated particles may result in a slight decrease in self-cleaning ability and abrasion resistance.

Combination B:

titanium dioxide nanoparticles: 10 parts by weight;

rare earth oxide coated particles: 5 parts by weight;

quartz sand or fused corundum: 80 parts by weight;

high temperature ceramic binder: 2 parts by weight;

this combination is more focused on improving the self-cleaning ability and abrasion resistance of the drainage agent, and is suitable for use in high temperature casting environments where additional properties are required. The higher proportion of titanium dioxide and rare earth oxide coated particles helps to improve the high temperature resistance and self-cleaning properties.

Combination C:

titanium dioxide nanoparticles: 7 parts by weight;

rare earth oxide coated particles: 3 parts by weight;

quartz sand or fused corundum: 83 parts by weight;

high temperature ceramic binder: 4 parts by weight;

this combination aims at balancing all properties of the drainage agent. It provides good self-cleaning ability, moderate wear resistance, while maintaining sufficient heat resistance and structural stability.

The effect of each combination will depend on the needs in the particular application. For example, for those casting environments operating at extremely high temperatures and requiring high self-cleaning capabilities, it may be more appropriate to select combination B. And for those applications where the basic functionality is more demanding and the operating environment is relatively gentle, it may be more desirable to select either combination a or C. By adjusting the proportions of these components, the drainage agent can be optimized to accommodate different casting conditions and requirements.

A comparative example is given below to demonstrate the specific effect of the drainage agent provided in this example, with emphasis on material selection, performance and final casting effect.

A conventional drainage agent may comprise the following components: conventional quartz sand or fused corundum, filler materials without special treatment, and conventional binders. Such conventional drainage agents do not contain specialized high temperature resistant or self-cleaning components such as titanium dioxide nanoparticles or rare earth oxide coated particles.

Table 1, comparison of Performance between traditional drainage agent and various combination drainage agents

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Table 1 shows the improvement in key performance characteristics of different drainage agent combinations over traditional drainage agents. For example, all new combinations are superior to traditional drainage agents in terms of high temperature resistance. Combination B performs best in terms of self-cleaning ability, while combination C provides good balance performance in several respects. By such comparison, the most suitable combination of drainage agents can be selected according to the specific application requirements.

In summary, the drainage agent provided by the present example shows significant improvements in high temperature casting environments through its unique combination of materials and performance advantages over conventional drainage agents. The device can reduce maintenance requirements, improve working efficiency, and improve quality of a final cast product while maintaining stability and durability. These advantages make the drainage agent of the present embodiment a significant advantage in high temperature casting applications.

The second embodiment of the application provides a drainage agent, which is prepared from the following raw materials in parts by weight:

5 to 10 parts by weight of titanium dioxide nanoparticles; 2 to 5 parts by weight of rare earth oxide coated particles; 80 to 85 parts by weight of quartz sand or fused corundum; 2 to 5 parts by weight of a high temperature ceramic binder; 0.5 to 2 parts by weight of barium borate particles; wherein the rare earth oxide coating particles are neodymium oxide or lanthanum oxide coated rare earth oxide coating particles; the high temperature ceramic adhesive is an aluminosilicate-based high temperature ceramic adhesive.

Second embodiment on the basis of the first embodiment, the introduction of barium borate particles as a constituent of the drainage agent is an innovative measure, the content of which is set at 0.5 to 2 parts by weight. This ratio is set taking into account the unique properties of barium borate and its role in the overall drainage agent.

Barium borate is an important chemical substance that has many unique physical and chemical properties. First, barium borate has good chemical resistance and thermal stability, which makes it particularly important in high temperature casting processes. Under these extreme operating conditions, corrosion resistance and thermal stability are key factors in drainage agent performance.

Secondly, the barium borate particles can also improve the overall mechanical strength of the drainage agent. The drainage agent needs to maintain a certain strength and wear resistance to withstand continuous high temperatures and physical impacts during casting. The structural strength of the drainage agent can be effectively enhanced by adding the barium borate particles, and the stability of the drainage agent under high temperature and mechanical pressure is ensured.

In view of these characteristics, the addition of barium borate particles not only improves the performance of the drainage agent in high temperature environments, but also expands its applicability in particular industrial applications. The proportion of 0.5 to 2 parts by weight is chosen to ensure that the barium borate particles are able to effectively exert their effect while maintaining the overall balance of properties of the drainage agent. The careful proportioning ensures the synergistic effect of the barium borate particles and other components in the drainage agent, so that the drainage agent shows more excellent performance in the high-temperature casting process.

The performance of the drainage agent provided by the second example compared to the combination B drainage agent provided by the first example was compared to the test results as follows:

the wear resistance is improved:

the drainage agent of the first example had an abrasion resistance rating of 8 (10 minutes per minute) during high temperature casting.

The drainage agent added with the barium borate particles in the second embodiment achieves a wear resistance rating of 9, which is improved by about 12.5%. The addition of barium borate enhances wear resistance by enhancing structural strength.

And the mechanical strength is improved:

the drainage agent of the first embodiment is subjected to a maximum pressure of 1000 newtons in the standard pressure test.

The drainage agent in the second embodiment can bear the pressure of up to 1200 newtons, and the mechanical strength of the drainage agent is improved by 20%. The addition of barium borate particles strengthens the mechanical strength of the drainage agent, so that the drainage agent can resist high temperature and physical pressure.

Improvement of high temperature resistance:

the maximum temperature at which the drainage agent of the first embodiment can stably operate in continuous use is 1500 ℃.

The drainage agent added with the barium borate in the second embodiment can still keep stable at the temperature of up to 1600 ℃, and the high temperature resistance is improved by about 6.7%. The thermal stability of barium borate contributes to this improvement.

The third embodiment of the application provides a drainage agent, which is prepared from the following raw materials in parts by weight:

5 to 10 parts by weight of titanium dioxide nanoparticles; 2 to 5 parts by weight of rare earth oxide coated particles; 80 to 85 parts by weight of quartz sand or fused corundum; 2 to 5 parts by weight of a high temperature ceramic binder; 1 to 4 parts by weight of molybdenum silicide particles; wherein the rare earth oxide coating particles are neodymium oxide or lanthanum oxide coated rare earth oxide coating particles; the high temperature ceramic adhesive is an aluminosilicate-based high temperature ceramic adhesive.

The molybdenum silicide particles are added in an amount of 1 to 4 parts by weight in order to provide specific advantages while maintaining the overall performance balance of the drainage agent.

Molybdenum silicide, a high performance material, is known for its excellent high temperature resistance and chemical stability. Molybdenum silicide exhibits excellent thermal shock resistance and wear resistance under high temperature environments, particularly under extreme conditions such as casting. This makes molybdenum silicide particles an ideal choice for enhancing the durability of the drainage agent.

The high temperatures and mechanical stresses experienced by the drainage agent during casting are key factors that must be considered in its design and manufacture. After molybdenum silicide particles are added, the particles can obviously improve the overall heat resistance and mechanical stability of the drainage agent. This means that the drainage agent is able to maintain its integrity and performance under continuous high temperature exposure and repeated mechanical pressure, thereby improving the efficiency and reliability of the casting process.

In addition, the chemical stability of molybdenum silicide is also important to prolong the service life of the drainage agent. During casting, the drainage agent may come into contact with various chemicals, including corrosive metal melts and other chemicals. The addition of molybdenum silicide particles provides additional chemical protection, enabling the drainage agent to better resist these potential corrosive factors.

The addition of molybdenum silicide particles not only improves the performance of the drainage agent under high temperature and mechanical stress, but also improves the stability of the drainage agent in a chemical corrosion environment. By carefully selecting the ratio of 1 to 4 parts by weight, it is ensured that these particles can function effectively without affecting the other key properties of the drainage agent. Thus, such improved drainage agents are more suitable for use in the high temperature casting industry, especially in applications requiring extremely high heat resistance and chemical stability.

The performance of the drainage agent provided by the third example, compared to the combination B drainage agent provided by the first example, was compared to the test results as follows:

heat resistance is improved:

the maximum temperature that the drainage agent without molybdenum silicide particles can withstand is 1500 ℃.

After molybdenum silicide particles are added, the highest temperature which the drainage agent can bear is increased to 1600 ℃, and the heat resistance is improved by about 6.7%.

Mechanical stability enhancement:

the maximum mechanical pressure that the drainage agent without molybdenum silicide particles can withstand in continuous use is 1000 newtons.

After molybdenum silicide particles are added, the drainage agent can bear the pressure of 1300 newtons, and the mechanical stability is enhanced by 30%.

The service life is prolonged:

the average service life of the drainage agent without molybdenum silicide particles in a high-temperature casting environment is 100 casting cycles.

After molybdenum silicide particles are added, the average service life of the drainage agent in a high-temperature casting environment is prolonged to 145 casting cycles, and the service life is prolonged by 45%.

The fourth embodiment of the application provides a drainage agent, which is prepared from the following raw materials in parts by weight:

5 to 10 parts by weight of titanium dioxide nanoparticles; 2 to 5 parts by weight of rare earth oxide coated particles; 80 to 85 parts by weight of quartz sand or fused corundum; 2 to 5 parts by weight of a high temperature ceramic binder; 0.5 to 3 parts by weight of silicon nitride particles; wherein the rare earth oxide coating particles are neodymium oxide or lanthanum oxide coated rare earth oxide coating particles; the high temperature ceramic adhesive is an aluminosilicate-based high temperature ceramic adhesive.

The content of the silicon nitride particles is selected to be set to 0.5 to 3 parts by weight in order to make full use of the unique properties of silicon nitride while ensuring its synergistic effect with other components in the drainage agent.

Silicon nitride, which is a high-performance ceramic material, is widely used in severe environments due to its excellent thermal stability, chemical resistance and mechanical strength. The extreme temperatures and chemical corrosion faced by the drainage agent are critical factors that must be considered in their design during high temperature casting. Silicon nitride particles exhibit excellent properties under these conditions, making them ideal choices for enhancing drainage agent performance.

First, the thermal stability of silicon nitride means that it can maintain its physical properties at temperatures up to thousands of degrees, which is critical to improving the high temperature resistance of the drainage agent. This heat resistant property ensures that the drainage agent maintains its properties during high temperature casting, and thus improves casting efficiency and product quality, when continuously exposed to high temperature environments.

Second, the chemical resistance of silicon nitride provides additional protection for the drainage agent. In a casting environment, the drainage agent may contact various corrosive substances, including metal melts and other chemicals. The addition of silicon nitride particles can help the drainage agent resist these potential corrosive factors, thereby extending the service life.

In addition, silicon nitride has good mechanical strength, which is important for the drainage agent to maintain its structural integrity when subjected to continuous mechanical shock and high temperature stress. The addition of silicon nitride particles helps to improve the stability and consistency of the casting by enhancing the overall strength of the drainage agent.

In conclusion, the addition of the silicon nitride particles not only improves the high temperature resistance and chemical corrosion resistance of the drainage agent, but also enhances the mechanical strength of the drainage agent. By carefully adjusting the content of silicon nitride particles in the drainage agent, it is ensured that they can effectively act synergistically with other ingredients, thereby making the drainage agent more suitable for high temperature casting environments, especially in applications requiring extremely high heat resistance and chemical stability.

The fourth embodiment provides a 6.7% increase in maximum temperature that the drainage agent can withstand compared to the combination B drainage agent provided by the first embodiment. The fourth embodiment provides a drainage agent that can withstand higher pressures, with a mechanical stability enhancement of about 18%. The fourth embodiment provides a drainage agent that can have a significantly increased service life, which is extended by about 31%.

The performance of the drainage agent provided by the fourth example compared to the combination B drainage agent provided by the first example was compared to the test results as follows:

heat resistance is improved:

the highest temperature that the drainage agent without the silicon nitride particles added can withstand is 1500 ℃.

After the silicon nitride particles are added, the temperature is increased to 1600 ℃, and the heat resistance is improved by about 6.7%.

Mechanical stability enhancement:

the maximum mechanical pressure that the drainage agent without added silicon nitride particles can withstand in continuous use is 1000 newtons.

After the silicon nitride particles are added, the drainage agent can bear pressure of 1150 newtons, and the mechanical stability is enhanced by 11.5%.

The service life is prolonged:

the average service life of the drainage agent without adding silicon nitride particles in a high-temperature casting environment is 100 casting cycles.

After the silicon nitride particles are added, the service life is prolonged to 130 casting cycles, and the service life is prolonged by 30 percent.

The fifth embodiment of the application provides a drainage agent, which is prepared from the following raw materials in parts by weight:

5 to 10 parts by weight of titanium dioxide nanoparticles; 2 to 5 parts by weight of rare earth oxide coated particles; 80 to 85 parts by weight of quartz sand or fused corundum; 2 to 5 parts by weight of a high temperature ceramic binder; 1 to 3 parts by weight of zirconia nanoparticles; wherein the rare earth oxide coating particles are neodymium oxide or lanthanum oxide coated rare earth oxide coating particles; the high temperature ceramic adhesive is an aluminosilicate-based high temperature ceramic adhesive.

Zirconia (ZrO 2) nanoparticles are known for their excellent physical and chemical properties, in particular in terms of high temperature stability and wear resistance. The nanoscale particle size of zirconia means that they have a very high surface area to volume ratio, providing more surface active area. This property is important in a variety of industrial applications, particularly in high temperature casting environments.

During casting, the drainage agent needs to maintain performance at high temperatures and strong physical pressures. The addition of the zirconia nano particles obviously enhances the high temperature resistance of the drainage agent. This means that the drainage agent is able to maintain its structure and function more effectively during continuous high temperature operation, thereby improving the quality and consistency of the cast product.

In addition to high temperature resistance, zirconia provides excellent wear resistance to the drainage agent. Drainage agents are often subject to wear from the molten metal and other mechanical factors during the casting process. The hardness and wear resistance of the zirconia nanoparticles ensures that the drainage agent is resistant to these wear factors, thereby extending its useful life.

In addition, the chemical stability of zirconia makes it excellent in chemically corrosive environments. This is very important for the various chemicals that may be contacted during the casting process, as it helps to protect the drainage agent from corrosive chemicals.

Taken together, the addition of zirconia nanoparticles makes the drainage agent provided in this example excellent in terms of high temperature resistance, abrasion resistance, and chemical stability. These properties make the drainage agent very suitable for use in the high temperature casting industry, especially in applications where stability and durability of the material under extreme conditions are required. By precisely controlling the zirconia nanoparticle content in the drainage agent, this example ensures its excellent performance while maintaining the balance and effectiveness of the overall material.

In the fifth example, zirconia nanoparticles were added as compared to the combination B drainage agent provided in the first example, and the performance comparison test results were as follows:

heat resistance is improved:

the maximum temperature that the drainage agent without zirconia nanoparticles can withstand is 1500 ℃.

After adding the zirconia nanoparticles, the temperature is increased to 1550 ℃, and the heat resistance is improved by about 3.3%.

Abrasion resistance enhancement:

the drainage agent without zirconia nanoparticles shows a degree of wear in continuous use.

The wear resistance of the drainage agent is improved by about 20% after the zirconia nanoparticles are added, as zirconia is a very hard and wear resistant material.

The service life is prolonged:

the average service life of the drainage agent without zirconia nano particles in a high-temperature casting environment is 100 casting cycles.

After the zirconia nano particles are added, the service life is prolonged to 120 casting cycles, and the service life is prolonged by 20 percent.

A sixth embodiment of the present application provides a method for preparing a drainage agent, including:

uniformly mixing titanium dioxide nano particles and rare earth oxide coating particles according to the proportion of 5 to 10 weight parts and 2 to 5 weight parts to obtain a first mixture;

adding quartz sand or fused corundum into the first mixture, wherein the adding amount is 80-85 parts by weight, and slowly stirring in the adding process to ensure that the quartz sand or fused corundum and the first mixture are uniformly dispersed to obtain a second mixture;

adding a high temperature ceramic binder to the second mixture in an amount of 2 to 5 parts by weight; continuing to stir to ensure that the binder is thoroughly mixed with the other materials to form a uniform drainage agent precursor mixture;

placing the drainage agent precursor mixture into a mold, and compacting to form a drainage agent blank of a specified shape and size;

and (3) placing the drainage agent blank into a sintering furnace, and performing high-temperature sintering treatment at the temperature of 800-1200 ℃ for 1-5 hours.

The preparation method of the drainage agent is a well-designed process, which ensures uniform mixing of the materials and proper heat treatment, thus obtaining a final product with excellent properties.

First, the preparation starts with mixing titanium dioxide nanoparticles and rare earth oxide coated particles. The titanium dioxide nanoparticles herein exert a self-cleaning effect, while the rare earth oxide coated particles increase the high temperature and abrasion resistance. The mixing of these particles in specific proportions ensures that each component will perform effectively while maintaining the balance of the overall mixture. Wherein the titanium dioxide nano-particles are 5 to 10 parts by weight, the rare earth oxide coating particles are 2 to 5 parts by weight, and the average particle diameter of the titanium dioxide nano-particles is 10 to 50 nanometers.

Rare earth oxide coated particles, which may be neodymium oxide or lanthanum oxide coated particles, provide excellent high temperature resistance and chemical stability. These coated particles typically have a core-shell structure, the core may be of other materials, and the shell is a rare earth oxide. The core may be a silicate material that has good heat resistance and mechanical strength, making it an ideal core material for high temperature applications.

Next, quartz sand or fused corundum is added to this mixture, which is the main component of the drainage agent, providing the necessary mechanical support and heat resistance. During the addition of these materials, slow stirring is critical, as it ensures that the quartz sand or fused corundum is uniformly dispersed with the previous mixture, thus forming a uniform second mixture. 80 to 85 parts by weight of quartz sand or fused corundum, which may have a particle size ranging from 100 to 500 microns.

Subsequently, a high temperature ceramic binder is added to this second mixture. The adhesive provides excellent bonding performance under high-temperature environment, and is key for maintaining the structural stability of the drainage agent. Stirring is continued to ensure adequate mixing of the binder with the other ingredients, a step that is critical to forming a uniform drainage agent precursor mixture. An aluminosilicate-based high temperature ceramic adhesive may be used because it provides excellent bonding properties and stability at high temperatures. The role of such binders in drainage agents is to maintain the overall structure of the various particles and powders, especially under high temperature conditions. It ensures that the drainage agent does not disintegrate or break down due to thermal stresses during the casting process.

Thereafter, the drainage agent precursor mixture is placed into a mold for compaction to form the specified shape and size. This step is important for the accuracy and consistency of the final product.

And the final step is to put the formed drainage agent blank body into a sintering furnace for high-temperature sintering treatment. The choice of sintering temperature and time is critical to ensure high temperature resistance and mechanical stability of the material. Sintering at a temperature of 800 to 1200 degrees celsius for 1 to 5 hours can ensure that the drainage agent blank obtains the necessary physical and chemical properties while maintaining its shape.

The overall manufacturing process is carefully designed to ensure that each component of the drainage agent is able to fully perform its function in the final product, thereby providing optimal performance during high temperature casting.

While the preferred embodiment has been described, it is not intended to limit the invention thereto, and any person skilled in the art may make variations and modifications without departing from the spirit and scope of the present invention, so that the scope of the present invention shall be defined by the claims of the present application.

Claims

1. The drainage agent is characterized by being prepared from the following raw materials in parts by weight:

5 to 10 parts by weight of titanium dioxide nanoparticles; 2 to 5 parts by weight of rare earth oxide coated particles; 80 to 85 parts by weight of quartz sand or fused corundum; 2 to 5 parts by weight of a high temperature ceramic binder; 0.5 to 2 parts by weight of barium borate particles; wherein the rare earth oxide coating particles are neodymium oxide or lanthanum oxide coated rare earth oxide coating particles; the high-temperature ceramic adhesive is an aluminosilicate-based high-temperature ceramic adhesive; the titanium dioxide nanoparticles have an average particle diameter of 10 to 50 nanometers; the particle size of the quartz sand or the fused corundum ranges from 100 to 500 micrometers.