Clay insulated lightweight firebrick Refractory Materials Iron and steel smelting
Refractory fired from refractory clay or other refractory materials. Light yellow or brown. It is mainly used in building smelting furnace and can withstand high temperature of 1580 ℃ - 1770 ℃. Also called refractory brick. Refractory of certain shape and size. According to the preparation process, it can be divided into sintered brick, non sintered brick, fused cast brick (fused cast brick) and refractory and heat insulation brick; It can be divided into standard brick, ordinary brick, special-shaped brick, etc. according to shape and size. It can be used as the structural material of high-temperature building materials, building kilns and various thermal equipment. It can withstand various physical and chemical changes and mechanical effects at high temperature. Such as refractory clay brick, high alumina brick, silica brick, magnesia brick, etc.
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
Clay heat insulation light firebrick
Clay heat insulation light firebrick, is made of refractory clay as the main raw material AL2O3 content of 30% ~ 48% heat insulation firebrick. Its production technology adopts burn - out method and foam method. With refractory clay, drift bead and refractory clay clinker as raw materials, adding binder and sawdust, the product with volume density of 0.3 ~ 1.5g /cm3 has been prepared by batching, mixing, forming, drying and firing. The output of clay insulation brick accounts for more than half of the total output of insulation refractory brick.
The Chinese standard (GB 3994 -- 1983) divides the clay heat insulation brick into 10 grades of NG -- 1.5, NG -- 1.3A, NG -- 1.3b, NG -- 1.0, NG -- 0.9, NG -- 0.8, NG -- 0.7, NG -- 0.6, NG -- 0.5, NG -- 0.4 according to the volume density.