الوصف

Name:spinel;
Chemical formula:MgAl2O4;
Category: Magnesia aluminum oxide;
Refraction rate:1.****1.**0;
Hardness:8;
Hardness:3.***4.62g/cm3;
Classification: containing magnesium, iron, zinc, manganese and other elements, it can be divided into aluminum spinel, iron spinel, zinc spinel, manganese spinel, chrome spinel, etc;
Color: magnesium spinel is between red, blue, green, brown, or colorless; zinc spinel is dark green; iron spinel is black and so on;
Shape: a hard glass shaped eight face or particle and block;
Features: spinel can be treated with heat treatment to improve its color. The blue heater will turn green at**0℃ and heat to***0℃ turning yellow. This color changing effect is stable, and the red spinel can be heated to remove brown components and get pure red;
Classification of synthetic spinel:
1. According to production techniques or methods: sintered Al Mg spinel (sintered spinel) and electrofusion Al Mg spinel (melted spinel);
2. According to the raw material: Al bauxite based Al Mg spinel and alumina based Al Mg spinel (sintered or electrofusion);
3. According to its content and properties:magnesium rich spinel, aluminum rich spinel and active spinel;
4. According to the different indexes of Magnesium Oxide and alumina:Magnesium rich spinel and aluminum rich spinel are used in different fields;
Synthetic spinel raw materials: Magnesite and industrial alumina powder or bauxite;
Characteristics of spinel:
Good corrosion resistance, corrosion resistance, anti peeling ability, good slag resistance, strong abrasion resistance, good thermal stability, high temperature resistance and so on. The electric melted spinel has the characteristics of high temperature resistance, large body density, low water absorption, low thermal expansion coefficient, good thermal stability and strong corrosion resistance.
Application:
1. Refractories:raw materials;
2. Iron and steel smelting:castable: refractory;
3. Cement rotary kiln, glass industry kiln:filter belt, refractory castable;
4. Spinel brick, brick used in ladle, ladle castable etc:refractory.