| Place of Origin: | YiXing |
|---|---|
| Brand Name: | HY |
| Certification: | ISO9001 |
| Model Number: | 1-2mm |
| Minimum Order Quantity: | 1ton |
| Price: | Negotiation |
| Packaging Details: | 25kgs PVC bags+1MT big bag |
| Delivery Time: | two weeks |
| Payment Terms: | L/C, T/T, Western Union |
| Supply Ability: | 100 tons one month |
| Product Name: | Ceramic Alumina Hollow Spheres | Appearance: | White Hollow Sphere |
|---|---|---|---|
| Fire-resistance Temperature: | 1850℃ | Chemical Composition: | AL₂O₃,Si₂O,Fe₂O₃ |
| Grading: | 0.2-1mm,1-2mm,2-3mm,3-5mm | Feature: | Very Light |
| Highlight: | Alumina Bubble Hollow Sphere,3mm Alumina Bubble,5mm bubble alumina castable |
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white hollow sphere new style high temperature thermal insulation heat insulation filler
Product name:alumina bubble
Specification:1-2mm
Aluminum oxide hollow ball is a lightweight thermal insulation refractory material made by blowing out aluminum oxide after high-temperature melting in an electric arc furnace. Its characteristics are light weight, closed cell, and high temperature resistance, making it an ideal insulation filling material for high-temperature kilns, a high-quality aggregate for high-temperature lightweight refractory casting materials, and excellent high-temperature resistance, insulation, and energy-saving refractory materials.
1. What is alumina hollow ball ?
Aluminum oxide hollow spheres are a new type of high-temperature insulation material, with a crystal form of a-Al2O3 microcrystals. Using alumina hollow balls as the main body, various shapes of products can be made, with a usage temperature of up to 1800 degrees Celsius. The mechanical strength of the products is high, several times that of ordinary lightweight products, and the bulk density is only half of that of corundum products.
2. Characteristics and properties of alumina hollow spheres.
Aluminum oxide hollow spheres are lightweight, high temperature resistant, and have good insulation properties. With aluminum oxide hollow spheres as the main body, they can be made into various shapes of products, with a service temperature of 1800 ℃. The mechanical strength of the products is several times that of ordinary lightweight products, and the bulk density is only half of that of corundum products.
3. Classification of alumina hollow spheres.
There are two types of alumina hollow balls: mixed grade ball and graded ball. The particle size of mixed grade ball is 0.2-5mm, and the particle size of graded ball is 0.1-0.2mm, 0.2-0.5mm, 0.5-1mm, 1-2mm, 2-3mm, 3-5mm.
Aluminum oxide hollow balls can be used as high-temperature and ultra-high temperature insulation fillers, lightweight aggregates for high-temperature refractory concrete, high-temperature pouring materials, and can also be used for high-temperature energy-saving inverted flame kilns, shuttle kilns, molybdenum wire furnaces, tungsten rod furnaces, induction furnaces, nitriding furnaces, etc. For reducing the weight of the furnace body, reforming the structure, saving materials, and energy, significant results will be achieved.
4. Advantages of alumina hollow spheres
---High usage temperature: up to 1750 degrees Celsius or above, with good thermal stability. The change rate of the reheating line is small, and it can be used for a longer time.
---Energy saving: Aluminum oxide hollow balls have obvious insulation properties and low thermal conductivity, which can achieve good insulation effect, reduce heat dissipation, improve thermal efficiency, and thus achieve the goal of energy conservation.
--- Material saving: Using alumina hollow balls can save 1.1 to 1.9 tons of heavy bricks per cubic meter, and can also save 80% of refractory insulation materials.
---Optimize the structure and reduce the weight of the furnace body: alumina hollow ball bricks are only 1.1-1.5g/cm, and the same cubic meter volume can reduce the weight by 1.1-1.9 tons using alumina hollow ball bricks.
5. Physical properties of alumina hollow spheres
---Angle of repose: the angle of repose of alumina refers to the inclination angle of natural accumulation of materials on a smooth plane. Alumina with larger angle of repose is easier to dissolve in electrolyte. During the electrolysis process, it can cover the electrolyte shell well and has less flying loss.
---A-Al2O3 content: The a-Al2O3 content in alumina reflects the degree of alumina calcination, and the higher the calcination degree, the higher the a-Al2O3 content. The hygroscopicity of alumina deteriorates with the increase of a-Al2O3 content. Therefore, the alumina used for electrolysis requires a certain amount of a-Al2O3. However, the solubility of a-Al2O3 in electrolytes is relatively low Υ- Al203 is poor.
---Unit weight: The unit weight of alumina refers to the weight of a unit volume of material in its natural state. Usually, alumina with a small bulk density is beneficial for dissolution in electrolytes.
---Particle size: The particle size of alumina refers to its fineness. The particle size of alumina must be appropriate, and if it is too coarse, it will dissolve slowly in the electrolyte. Even precipitation. Passing through detailed rules can easily lead to flying losses.
---Specific surface area: The specific surface area of aluminum oxide refers to the total surface area of the external surface area of a unit weight material and the sum of the internal pore surface area. It is an important indicator of the activity of a substance. Aluminum oxide with a large specific surface area has good solubility and high activity in electrolytes, but is prone to moisture absorption.
6. Wear coefficient: The so-called wear coefficient refers to the impact of alumina grinding on a fluidized bed under certain conditions. The percentage change in particle size content in the sample. The wear coefficient is a physical indicator that characterizes the strength of alumina.
7. The purpose of alumina hollow balls:
(1). Aluminum oxide hollow balls can be used as high-temperature and ultra-high temperature insulation fillers, lightweight aggregates for high-temperature refractory concrete, high-temperature pouring materials, etc.
(2). Aluminum oxide hollow ball refractory bricks can be used for high-temperature energy-saving inverted flame kilns, shuttle kilns, molybdenum wire furnaces, tungsten rod furnaces, induction furnaces, nitriding furnaces, etc. For reducing the weight of the furnace body, reforming the structure, saving materials, and energy, significant results will be achieved.
(3).It is widely used in high-temperature and ultra-high temperature kilns such as petrochemical industry gasifiers, carbon black industry reactors, and metallurgical industry induction furnaces.
