Refractory varieties, different uses, it is necessary to scientific classification of refractory materials, in order to facilitate scientific research, rational selection and management.
There are many kinds of refractory materials, including chemical attribute classification, Chemical mineral Composition classification, production process classification, material form classification, and other methods.
1, according to the high and low degree of fire resistance:
Common refractories: 1580℃~1770℃
Advanced Refractory: 1770℃~2000℃
Super Refractory: >2000℃
2, according to the product shape and size of different points:
Standard type: 230mmx114mmx65mm;
Not more than 4 gauges, (size ratio) max:min<4:1;
Abnormity: not more than 2 concave angle, (size ratio) max:min<6:1;
Or have an acute angle of 50~70°;
Special shaped: (size ratio) max:min<8:1;
Or not more than 4 concave angles; or there is a 30~50° acute angle;
Special Products: crucible, utensils, tubes, etc.
3, according to the manufacturing method refractories can be divided into:
Firing products, not firing products, amorphous refractories
4. Classification by Material chemistry attribute:
Acid refractory, neutral refractory, alkaline refractory
5. Classification by chemical mineral composition
This classification can directly characterize the basic composition and characteristics of various refractory materials, and it is a common taxonomy in production, use and scientific research, and has a strong practical application significance.
Silica (silicon oxide)
Magnesium, magnesium, magnesium, aluminum, magnesium, silica
Carbon composite Refractories
Zirconium Refractories Special Refractory