Sillimanite Bricks Properties
1.Sillimanite bricks have good creep resistance, low creep rate in high temperature environment.
2.Sillimanite refractory bricks have good thermal shock resistance.
3.Sillimanite bricks have The load is softened and stabilized.
4.Sillimanite bricks have good resistance to gas attack.
What is a sillimanite brick?
1.Sillimanite brick is a refractory brick that participates in some sillimanite in high alumina brick materials. It is customarily called sillimanite brick. It is a kind of silicon lined high alumina brick, which is a refractory product variety of modified high alumina refractory brick.Sillimanite brick is made of bauxite as the main refractory material, adding sillimanite powder and participating in bonding agent, after mixing and molding. Refractory bricks fired at high temperatures. Because sillimanite bricks appear in the high temperature firing process, they can be classified into mullite refractroy bricks; sillimanite bricks can be attributed to high alumina refractory bricks in terms of alumina content. Sillimanite brick has a refractoriness of 1770-1830 ℃, and the load softening starts at a temperature of 1500-1600 ° C.
Sillimanite Brick Introduction to Creep Type
According to the high alumina brick, the creep characteristics and mechanism of the sillimanite brick were deeply studied systematically. The creep curve of the 400-1500 °C sillimanite fire brick was divided into three types.
The first variety: a form that fits the general creep curve. The initial stage is the deceleration and metamorphosis stage in which the creep rate is gradually decreased, followed by the constant velocity creep stage in which the creep rate is constant, and the creep rate is continuously added. The creep curve of this type is mostly found in low creep refractory bricks of 1400~1500℃, that is, sillimanite brick are participated in the general fired high alumina bricks.
The second type: the initial stage of the creep curve is the deceleration creep stage in which the creep rate decreases. After a certain time, the creep rate is zero and the creep rate does not change with time. That is, the creep rate is equal.
The third type: the creep curve is the decelerating creep stage in which the enthalpy change rate decreases first. When the creep rate reaches the maximum, the creep rate becomes a negative value, see the gradual increase and the creep rate gradually decrease. It appears in the low creep high alumina brick of 500~1550℃, that is, refractory brick with sillimanite and corundum material is added in the general high alumina refractory brick.
where is Sillimanite Brick Found
Rongsheng refractory brick manufacturers are committed to the research, development and production of advanced special refractory materials. Now the leading products are: high alumina brick, high purity corundum products, corundum mullite products, mullite corundum products, alumina hollow sphere products, light corundum products, lightweight corundum mullite products, zircon brick products, chrome refractory brick products, 75 mullite bricks, 70 mullite bricks, 65 sillimanite bricks, 60 sillimanite bricks, rutile various shaped refractory bricks.
Perennial supply of mullite brick, sillimanite brick: aluminum content greater than 65%, iron content less than 1%, apparent porosity less than 20%, bulk density greater than 2.5, normal temperature compressive strength greater than 80, load Softening temperature is more than 1600 ℃
