Magnesian firebrick high temperature resistance Refractory Materials Iron and steel smelting
Firebrick is called firebrick. Refractory material fired from refractory clay or other refractory materials. Light yellow or brown. Mainly used for building smelting furnace, can withstand 1,580 ℃ - 1,770 ℃ high temperature. Also called firebrick. Refractory material of definite shape and size. According to the preparation process, it can be divided into fired brick, non-fired brick, fused brick (fused cast brick), fire-resistant and heat-insulating brick; Can divide by shape and dimension standard brick, common brick, special unusual brick to wait. It can be used as high temperature building materials and structural materials for building kilns and various thermal equipment, and can withstand various physical and chemical changes and mechanical action at high temperature. Such as refractory clay brick, high alumina 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
Magnesian firebrick refers to firebrick with magnesite as raw material, square magnesite as the main crystal phase and MgO content above 80% ~ 85%. Its products are divided into metallurgical magnesia and magnesium products of two major categories. According to the different chemical composition and use, there are Martin sand, ordinary metallurgical magnesia, ordinary magnesia brick, magnesia silicon brick, magnesia aluminum brick, magnesia calcium brick, magnesia carbon brick and other varieties. Magnesia refractory brick is the most important product of alkaline refractory brick, with high refractoriness and good resistance to alkaline slag and iron slag. It is an important high-grade refractory brick. Mainly used in open furnace, oxygen converter, electric furnace and non-ferrous metal smelting, etc.