High aluminum refractory brick Refractory Materials Iron and steel smelting
Firebricks are called firebricks. Refractories are made of refractory clay or other refractories. Light yellow or brown. Mainly used in construction smelting furnace, can withstand the high temperature of 1580℃- 1770℃. Also called firebrick. Refractories of specific shapes and sizes. According to the preparation process, it can be divided into sintering brick, non-sintering brick, electrofusion brick (electrofusion cast brick), fire-resistant insulation brick; Can divide by shape and dimension standard brick, common brick, special different brick to wait. It can be used as high temperature building materials and structural materials for construction kilns and various thermal equipment, and can withstand various physical and chemical changes and mechanical effects under high temperature. Such as refractory clay brick, high aluminum brick, silicon brick, magnesia brick and so on.
1, chemical composition: the main composition determines the quality and characteristics of the refractory
2, volume density: unit volume weight, high density, indicating good density, strength may be high, but the thermal conductivity may be large.
3, apparent porosity: no specific requirements, but as a manufacturer must strictly control the apparent porosity.
4, load softening temperature: also known as high temperature load deformation temperature, this parameter is very important, marking the high temperature resistance of the material
5, thermal shock resistance: resistance to rapid temperature changes without being damaged
6, compressive strength: withstand (room temperature) the maximum pressure capacity
7, flexural strength: the ability to withstand shear pressure
8. Linear change rate: also called refiring line change or residual line change, refers to the change of volume expansion and contraction in the same temperature change every time. If each expansion and contraction is the same, we define such linear change rate as 0.
High aluminum refractory brick
The mineral composition of high alumina refractory brick is corundum, mullite and glass phase, and its content depends on the AL2O3/ SiO2 ratio and the type and quantity of impurities. Refractory brick grade can be divided according to AL2O3 content. The raw materials are high bauxite and sillimanite natural ores, but also mixed with fused corundum, sintered alumina, synthetic mullite, and clinker calcined with alumina and clay in different proportions. It is mostly produced by sintering. But the product also has cast brick, frit brick, non - fired brick and non - shaped firebrick. High alumina refractory bricks are widely used in iron and steel industry, non-ferrous metal industry and other industries.