Not less than 1580 ℃ refractoriness of inorganic non-metallic materials. Refractoriness refractory cone sample in which there is no load cases, resistance to high temperature and not soften the Celsius temperature of melting down. But just to define the refractoriness cannot fully describe the refractory, 1580 ℃ is not absolute. Is defined as any physical and chemical properties to allow its use in high temperature environment is called refractory material. Refractory material is widely used in metallurgy, chemical industry, petroleum, machinery manufacturing, silicate, industrial area, such as motivation, dosage the biggest, in the metallurgical industry accounts for 50% ~ 60% of total output.
Refractories used in steel, non-ferrous metal, glass, cement, ceramic, petrochemicals, light industry, machinery, boiler, electric power, military industry and so on the various fields of national economy, is to ensure that the production of industry and technology development essential basic material, in high temperature industrial production development plays an irreplaceable important role.
Refractories variety, different purposes, it is necessary to scientific classification of refractory material and scientific research, in order to facilitate reasonable selection and management. Refractory classification method are many, the main chemical properties classification, chemical classification of the mineral composition, production process methods such as classification, material shape classification.
1, according to the high refractoriness low score:
Common refractory material: 1580 ℃ ~ 1770 ℃
Advanced refractory, 1770 ℃ ~ 2000 ℃
Super refractory: > 2000 ℃
2, according to the products of different size and shape:
Standard: 230 mm * 114 mm * 65 mm;
Feet, not more than 4 quantity (than) Max: Min < 4:1;
Different type: not more than two concave Angle, (than) Max: Min < 6:1;
Or have a 50 ~ 70 ° acute Angle;
Alien: (than) Max: Min < 8;
Or not more than 4 concave Angle; Or have a 30 ~ 50 ° acute Angle;
Special products: crucible, vessels, pipe, etc.
3, according to the refractory manufacturing method can be divided into:
Burnt products, not burnt products, monolithic refractories
4. According to the material classification chemical properties:
Acidic, neutral, alkaline refractory refractory refractory materials
5. According to classify chemical mineral composition
This kind of classification can be directly represent the basic composition and characteristics of all kinds of refractory materials, on the production, use, scientific research is a common taxonomy, has strong practical significance.
Siliceous (siliceous oxide)
Aluminum silicate
Just the quality of the jade
Magnesia, magnesium, calcium, magnesia, magnesium aluminum silica
Carbon composite refractory materials
Zircon refractory materials
Special refractories
6. Monolithic refractories classification (according to use classification method)
castable
Spray paint
Ramming material
plastic
Pin material
Casting material
Coated material
Dry vibrating materials
Their castable
Refractory mortar
