Raw Bauxite with High Alumina Products

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Loading Port:
Qingdao
Payment Terms:
TT OR LC
Min Order Qty:
400 m.t.
Supply Capability:
5000 m.t./month
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Specifications

raw bauxite
1. Producing for 20 years.
2. refractory and abrasive
3. Competitive price
4. Al2O3 95%min

It is made by electric arc furnace melting under high temperature of 1100 degrees to 1400 degrees with the raw material of bauxite, anthracite and scrap iron. The main ingredient is AL2O3. With its high micro hardness of 1800-2200kg/mm2, it has many uses like abrasives and refractory. This kind of product has two types P sand and F sand with different uses

Application:

1.     Be used in polishing, grinding.

2.   Suitablefor making grinding wheel, cutting, wheel, grinding disc.

3.   Its high hardness and abrasion adapt to abrasive tools.

4.   For advanced refractory materials

Application

Model

Al2O3 

Na2O

Fe2O3

SiO2

TiO2

LOI 

True density

a-Al2O3

D50

Particle size

specific surface

  Unit

≥ %

≤%

≤%

≤%

≤%

≤%

g/m3

≥ %

um

um

m2/g

Dry pressing/CIP series

TCH-101

99.7

0.08

0.02

0.018

0.006

0.15

3.96

96

75

2--3

0.6-0.8

TCH-102

99.6

0.1

0.02

0.018

0.006

0.15

3.95

95

75

2--3

0.6-0.8

TCH-103

99.5

0.2

0.02

0.018

0.006

0.2

3.95

95

75

2--3

0.8-1.0

TCH-105

99.4

0.3

0.02

0.018

0.006

0.2

3.93

93

75

2--3

0.8-1.0

Injection moulding 

TCH-213

99.5

0.15

0.02

0.018

0.006

0.15

3.95

95

75

3-4

0.5-0.6

TCH-211

99.7

0.1

0.02

0.018

0.006

0.1

3.96

96

75

3-5

 

Q:
When it comes to the repair and patching of monolithic refractories, there are several key factors that must be taken into consideration. First and foremost, it is crucial to thoroughly evaluate the extent and severity of the damage or deterioration. This assessment will help determine the most appropriate repair method and materials required. Minor cracks or small damages may only necessitate a simple patch or seal, whereas larger or more serious damage may require a complete replacement or a more extensive repair process. Secondly, the type of monolithic refractory material being utilized is a critical factor to consider. Different types of monolithic refractories possess varying properties and characteristics, such as thermal conductivity, chemical resistance, and mechanical strength. Therefore, it is vital to select a repair material that is compatible with the existing refractory material, ensuring proper bonding and optimal performance. Another factor to take into account is the operating conditions and environment in which the monolithic refractory is exposed. Variables such as temperature, pressure, chemical exposure, and abrasion can significantly impact the durability and longevity of the refractory material. Understanding these conditions will assist in selecting the appropriate repair materials and techniques that can withstand and perform well under these specific circumstances. Furthermore, it is imperative that the repair process is carried out by experienced personnel who possess knowledge about refractory materials and their installation. Improper repairs can lead to further damage or diminished performance, so it is essential to have skilled professionals who can execute the repair work correctly. Lastly, regular inspection and maintenance of the monolithic refractories are crucial in order to detect any potential damage or deterioration early on. Timely repairs and patching can prevent further deterioration and prolong the service life of the refractory material. In summary, the considerations for repairing and patching monolithic refractories involve evaluating the extent of damage, selecting compatible repair materials, understanding the operating conditions, employing skilled personnel, and conducting regular inspections and maintenance. By taking these factors into account, one can ensure effective repairs and the continued performance of monolithic refractories.
Q:
Yes, monolithic refractories can be used for the lining of ladle refining furnaces and VOD converters. Monolithic refractories are versatile and can be shaped and installed easily, making them suitable for lining various types of furnaces and converters, including ladle refining furnaces and VOD converters.
Q:
Monolithic refractories are widely used in iron and steel applications due to their excellent thermal shock resistance, high temperature stability, and mechanical strength. However, like any other material, they are not immune to failure. There are several common failure modes associated with monolithic refractories in iron and steel applications. 1. Spalling: Spalling is one of the most common failure modes of monolithic refractories. It refers to the detachment of refractory material from the surface due to thermal cycling, mechanical stress, or chemical reactions. Spalling can occur due to mismatched thermal expansion coefficients between the refractory and the surrounding structure, leading to cracking and subsequent detachment. 2. Erosion: Erosion is another prevalent failure mode in iron and steel applications. It occurs when the refractory material is subjected to the erosive action of molten metal, slag, or gases. The erosion can be a result of the physical impact of the flowing metal or the chemical attack by corrosive slag components. Erosion leads to the loss of refractory material, decreased lining thickness, and compromised performance. 3. Corrosion: Corrosion is a significant failure mode in iron and steel applications, particularly in contact with aggressive atmospheres or molten metal. Corrosion can result from chemical reactions between the refractory material and the corrosive agents, such as oxides, sulfides, or alkalis present in the environment. It leads to the formation of corrosion products, which can weaken the refractory lining and reduce its lifespan. 4. Thermal shock: Monolithic refractories are exposed to extreme temperature fluctuations in iron and steel applications. Rapid heating or cooling can lead to thermal shock, causing cracking and failure of the refractory material. Thermal shock can occur due to uneven heating or cooling, sudden changes in temperature, or thermal gradients within the refractory lining. 5. Abrasion: In certain iron and steel applications, monolithic refractories can be subjected to abrasive wear. This occurs when the refractory lining comes into contact with solid particles, such as metallic oxides, slags, or raw materials. The repeated impact and rubbing action of these particles can cause erosion and abrasion of the refractory material, leading to its failure. To mitigate these failure modes, proper refractory selection, installation techniques, and maintenance practices are crucial. Regular inspection, repair of damaged areas, and application of protective coatings can help extend the lifespan and performance of monolithic refractories in iron and steel applications.
Q:
Monolithic refractories resist chemical attacks from molten metals and slag due to their high chemical stability, which is achieved through the use of carefully selected raw materials and advanced manufacturing processes. These refractories are designed to have low porosity, which prevents the penetration of molten metals and slag into the material. Additionally, they possess high resistance to corrosion and erosion, even at high temperatures, allowing them to withstand the harsh chemical environments created by molten metals and slag.
Q:
Monolithic refractories possess unique properties and composition that enable them to endure thermal shock. Thermal shock occurs when there is a sudden alteration in temperature, leading to stress and potential damage to the refractory material. However, monolithic refractories are constructed to possess high resistance to thermal shock, and this is accomplished through various mechanisms. Firstly, the composition of monolithic refractories incorporates materials with low coefficients of thermal expansion. This implies that they undergo minimal alterations in size or volume when exposed to varying temperatures. This characteristic allows the refractory material to withstand thermal shock by minimizing the stress caused by temperature fluctuations. Secondly, monolithic refractories exhibit exceptional thermal conductivity. This quality enables them to efficiently transfer heat away from the hot regions, preventing localized overheating and diminishing the likelihood of thermal shock. The rapid dissipation of heat aids in maintaining a more even distribution of temperature within the refractory material, thereby reducing the chances of cracking or spalling. Furthermore, the binding agents employed in monolithic refractories play a vital role in enhancing their resistance to thermal shock. These binders provide strength to the refractory material and assist in preserving its integrity during thermal cycling. Additionally, the binders contribute to the refractory's ability to withstand thermal shock by reducing the permeability of the material, thus preventing the infiltration of hot gases or liquids that could cause damage. Moreover, the installation technique of monolithic refractories plays a significant role in their capacity to endure thermal shock. Typically, monolithic refractories are applied as a single, uninterrupted layer, eliminating the weak points such as joints and seams that exist in other refractory systems. This seamless installation method ensures superior resistance to thermal shock as there are no vulnerable points for cracks to propagate. In conclusion, monolithic refractories effectively withstand thermal shock through a combination of factors including their low coefficients of thermal expansion, high thermal conductivity, appropriate binding agents, and seamless installation techniques. These properties and design considerations enable monolithic refractories to proficiently handle rapid temperature changes and maintain their structural integrity, making them ideal for applications involving thermal cycling and extreme variations in temperature.
Q:
The lifespan of monolithic refractories in iron and steel applications can vary depending on several factors such as the specific type of refractory material used, the operating conditions, and the maintenance practices. However, on average, monolithic refractories in iron and steel applications can last anywhere from a few months to several years.
Q:
The iron and steel industry heavily relies on monolithic refractories, which serve as lining materials in various high-temperature processes like blast furnaces, ladles, and converters. Over time, the field of monolithic refractories has witnessed several crucial innovations that address specific challenges and enhance the overall performance of these linings. Among the significant innovations in monolithic refractories is the emergence of low cement and ultra-low cement castables. These castables contain reduced cement quantities, resulting in improved properties such as higher hot strength, better thermal shock resistance, and enhanced resistance to chemical attack. By decreasing the cement content, the refractory achieves higher density, reduced porosity, and increased mechanical strength, ultimately leading to improved durability and extended service life. Another innovation in monolithic refractories is the introduction of self-flowing castables. These castables are designed to exhibit excellent flowability and can be conveniently installed through pouring or pumping, eliminating the need for manual vibration. Self-flowing castables offer advantages like reduced installation time, improved lining quality, and enhanced performance in complex geometries or hard-to-reach areas. In recent years, advances in nanotechnology have also influenced the development of monolithic refractories. Refractory compositions now incorporate nanoparticles, such as nano-sized additives and binders, to enhance their properties. These nanoparticles enhance the refractory's mechanical strength, thermal conductivity, and corrosion resistance. Additionally, nanotechnology enables better control over refractories' microstructure, resulting in optimized performance and increased lifespan. The development of high-performance monolithic refractories has also been driven by the need for improved energy efficiency and reduced environmental impact. Insulating castables, for instance, have been created to provide excellent thermal insulation properties, leading to reduced heat loss and energy consumption in various applications. These refractories contribute to increased energy efficiency, lowered production costs, and minimized greenhouse gas emissions. Moreover, advanced installation techniques like gunning and shotcreting have revolutionized the application of monolithic refractories. These techniques enable faster and more precise installation, reducing downtime and improving productivity. Additionally, robotic application systems have been introduced, allowing for automated and consistent refractory installation, ensuring high-quality linings with minimal human intervention. In conclusion, key innovations in monolithic refractories for the iron and steel industry encompass the development of low cement and ultra-low cement castables, self-flowing castables, the incorporation of nanotechnology, the introduction of high-performance insulation materials, and advancements in installation techniques. These innovations have significantly enhanced the performance, durability, energy efficiency, and installation processes of monolithic refractories, thereby contributing to the overall efficiency and competitiveness of the iron and steel industry.
Q:
Monolithic refractories are different from conventional refractories in that they are composed of a single, continuous structure, whereas conventional refractories are made up of multiple individual bricks or shapes. Monolithic refractories offer greater flexibility in terms of installation, as they can be easily shaped and molded to fit various applications. Additionally, monolithic refractories usually have better thermal shock resistance and are more resistant to cracking, making them more durable and long-lasting compared to conventional refractories.
Q:
Monolithic refractories help enhance the durability of iron and steel furnaces by providing a high heat resistance and superior thermal insulation. They have the ability to withstand extreme temperatures, reducing the risk of thermal shock and cracking. Monolithic refractories also have excellent corrosion resistance, preventing chemical reactions with molten metal and slag. Their strong bonding properties ensure a tight seal, minimizing heat loss and improving energy efficiency. Overall, monolithic refractories contribute to the longevity and reliability of iron and steel furnaces by protecting them from the harsh conditions of high-temperature operations.
Q:
The installation of monolithic refractories in iron and steel production processes necessitates various methods depending on the specific application and requirements. The installation process typically encompasses the subsequent steps: 1. Surface Preparation: Prior to installing monolithic refractories, it is imperative to adequately prepare the surface where they will be applied. This involves cleansing and eliminating any loose materials, dust, or contaminants from the substrate. 2. Mixing: Monolithic refractories comprise diverse materials, including aggregates, binders, and additives. These constituents are blended in specific proportions to attain the desired properties and consistency. The mixing process can be executed manually or using mechanical mixers. 3. Application: Various techniques exist for applying monolithic refractories, such as gunning, casting, ramming, and troweling. The chosen method is contingent upon factors such as the structure's shape, accessibility, and required thickness. - Gunning: This technique entails utilizing a gunning machine to spray the refractory material onto the surface. It is frequently employed for repairing or patching existing linings or for swift installation in hard-to-reach areas. - Casting: In casting, the refractory material is poured into molds or forms and allowed to solidify and harden. This method is suitable for fabricating intricate shapes and large-sized components. - Ramming: Ramming involves manually or mechanically compacting the refractory material into a mold or form using a ramming tool. This approach is commonly employed for lining induction furnaces, ladles, and other equipment. - Troweling: Troweling is a manual method wherein the refractory material is applied and smoothed using a trowel. It is frequently utilized for minor repairs or touch-ups. 4. Curing: Subsequent to the application of the refractory material, curing is necessary to attain its optimal strength and performance. Curing involves allowing the material to dry and harden at a controlled temperature and humidity for a specified duration. This step is crucial to ensure the monolithic refractory lining's long-term durability and resistance. In conclusion, the installation of monolithic refractories in iron and steel production processes necessitates meticulous preparation, proper mixing, and the appropriate application technique. It is imperative to adhere to manufacturer guidelines and industry best practices to ensure a successful installation that fulfills the specific requirements of the production process.

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