There is a Chinese saying that "fire and water do not mix", and the same is true of refractory fire brick. Although it can withstand high temperature, it will lose its due essence when it encounters water, because the fire resistance brick is composed of materials with different components, and some materials are easy to react chemically after encountering water, damaging the material structure and reducing the service life. China Refractory Fire Brick factory can be responsible to tell you that refractory fire brick must do a good job of moisture-proof and waterproof measures. Fire resistance bricks can no longer be used in contact with water, and the reasons are explained from two aspects below.
Fire resistance bricks should not be waterproof before construction
Why refractory fire bricks should be waterproof and moisturproof We will take a simple example: take magnesia calcium brick: it is a magnesia refractory with cubic magnesite as the main crystalline phase and tricalcium silicate as the subcrystalline phase, which contains Mg080%87%, CA06%-9%, Ca0/Si02 ratio between 2.2 and 3.0. Its obvious structural characteristics are that the cubic magnesite is in direct contact with dicalcium silicate and tricalcium silicate, and the eutectic material (4Ca0·Al203·Fe203) is filled in fine veins between the crystal compounds of dicalcium silicate and tricalcium silicate. It has low porosity. The load softening starting temperature is generally higher than 1700, and the anti-alkaline slag performance is good. But the thermal shock resistance is poor. Magnesium calcium products will undergo a "hydration" reaction that contains calcium oxide and is easy to react with water, which will affect the strength and high temperature performance of the product. Therefore, China Refractory Fire Brick factory remind customers to pay attention to whether the composition of the firebrick will react with water or dissolve and deteriorate.
Refractory bricks cannot be waterproof during construction
We will encounter some uncertain factors in the process of using refractory fire bricks, for example, during the construction of fire resistance bricks encounter rain weather material wet water, in this case, strictly speaking, can not be constructed, fire bricks are wet by water to wait for the refractory brick itself after natural dry use, or according to the situation of masonry furnace type.
After encountering water, the porosity of firebrick increases, and the depth of water causes its own weight to increase. Some customers say that after the completion of kiln masonry is not there is the process of oven? China Refractory Fire Brick factory tell you that this is obviously a kind of fluke psychological, the purpose of the oven is to dry the lining completed by masonry, ramming a certain degree of oven strength, if the use of wet firebrick in the oven will cause a large number of free water vapor diffusion, so that water vapor will increase the overall porosity of the furnace lining from various parts, not only lengthening the oven time. It is possible that the free water in the refractory brick can not be completely discharged after the oven, resulting in the re-diffusion of water vapor in the refractory brick that infiltrates the water in the process of putting into production, resulting in the increase of the porosity of the furnace or the risk of loose masonry, so China Refractory Fire Brick factory does not recommend the use of wet refractory bricks.
Here we also guarantee that every brick we produce is in line with production standards. Make sure that every brick does not touch water, once it touches water, it will be disused.
