Rosewool Insulation Refractory Co.,Ltd.
Guidelines for selecting insulation refractory materials, ceramic fiber cotton, and avoiding pits? Ceramic fiber cotton is widely used in high-temperature industrial kilns, pipelines, power, petrochemicals, and other fields due to its functions and characteristics. Moreover, the quality of ceramic fiber cotton directly affects energy efficiency, equipment safety, and service life. So, when choosing insulation refractory materials – ceramic fiber cotton (also known as aluminum silicate fiber cotton), it is necessary to comprehensively consider the manufacturer’s strength, ceramic fiber cotton qualifications, customer reputation, and so on;
Key points for avoiding pits in ceramic fiber cotton core insulation refractory materials
Pit point one: Temperature level selection error (largest pit!)
Ceramic fiber cotton is mainly divided into several grades according to material and temperature resistance. Incorrect use can directly lead to material pulverization, failure, and even accidents.
Pit point two: Neglecting the content of “slag balls” and fiber length
Slag ball: It is a non fibrous impurity particle in the raw material that has not been completely fibrotic. It does not insulate and will reduce material strength and increase thermal conductivity.
Fiber length: Cotton/blankets made of long fibers have high tensile strength, good resilience, durability, and are not easily broken; Short fibers are fragile and have severe powder loss.
Pit point three: Confusing “thermal conductivity” and “operating temperature”
Thermal conductivity: Measuring insulation capacity, the lower the value, the better the insulation effect. But this data was obtained at specific testing temperatures (such as 200 ℃, 400 ℃, 600 ℃, 800 ℃).
Usage temperature: measures the heat resistance limit that a material can withstand.
Pit Point Four: Ignoring Form and Density Selection
form:
Loose cotton: Fill complex cavities and gaps. Note that the filling density should be uniform and no cavities should be left.
Blanket/felt (most common): pipe wrapping, flat wall lining. Attention should be paid to thickness and density.
Plate/irregular parts: parts that require a certain level of structural strength.
Module: Large industrial furnace wall lining, quick installation, resistant to airflow erosion.
Density: directly affects the insulation effect and strength. It is not necessarily better to have a higher or lower density.
Too low: Poor strength, easy to collapse, uneven insulation.
Excessive: Increased cost, heat capacity, and weight may reduce insulation effectiveness due to enhanced internal convection.
Pit point Five: Neglecting Safety and Environmental Performance
Biological solubility: Traditional ceramic fibers were once classified as “potential carcinogens”. Many high-quality products nowadays are “biologically soluble” (i.e. can be gradually dissolved and excreted in the human lung environment), with higher safety.
Dust: Poor quality products generate a large amount of inhalable dust during cutting and installation, which is harmful to health.
Technical parameters of ceramic fiber cotton：
| Item Product | COMMON | ST | HP | HA | HZ | |
| Classification Temp(ºC) | 1100 | 1260 | 1260 | 1360 | 1430 | |
| Working Temp (ºC) | <1000 | 1050 | 1100 | 1200 | 1350 | |
| Color | white | white | white | white | white | |
| Fiber dia(μm) | Blowing | 2~3 | 2~3 | 2~3 | 2~3 | 2~3 |
| Swinging | 3~4.5 | 3~4.5 | 3~4.5 | 3~4.0 | 3~4.0 | |
| Chemical composition(%) | Al2O3 | 44 | 46 | 47~49 | 52~55 | 39~40 |
| Al2O3+SiO2 | 96 | 97 | 99 | 99 | – | |
| Al2O3+SiO2+ZrO2 | – | – | – | – | 99 | |
| ZrO2 | – | – | – | – | 15-17 | |
Guidelines for selecting insulation refractory materials, ceramic fiber cotton, and avoiding pits? Choosing ceramic fiber cotton, the core is “temperature matching, report authenticity, good toughness, safety first“. Don’t just focus on affordability, a reliable testing report and clear product labeling are the most direct shields to avoid inferior products. For critical high-temperature equipment, it is recommended to consult professional thermal design personnel.
