Customer in Saudi Arabia ordered 105 tons refractory high alumina bricks
In November. 105 tons refractory high alumina bricks are packed for delivering to customer in Saudi Arabia. High quality refractory fire brick in Topower Refractory.
The quality and level of identification of high alumina brick can be identified from three aspects: appearance, physical and laboratory.
First of all, from the appearance color recognition: If the color of the high alumina brick is yellow, it is a three -level high -aluminum brick. If the color is yellow and white, it proves that it is a secondary high aluminum brick. If it is white, it proves that it is a first -class high alumina brick. If these three colors are not smooth or have no crystal phase, it means that the sintering temperature is low and the strength is not good when used.
In addition, it depends on whether there are dark spots or large -scale fusion on the surface of the high alumina brick. If there are black spots, because the iron content of the raw material is too high, the cave will occur during use, which will affect the life of the role. It also depends on whether the surface of the high aluminum brick is flat. If the surface is uneven, it is because the legs are burned during sintering. There are large bricks suppressed and there are uneven surface. This also affects the wrong layer during masonry, and it will also affect the service life in the later stage.
Next depends on the size, the size is measured with a ruler. If the high alumina brick is long, wide, and larger than 2mm, it means that the mold is large, or it may be the reason for raw materials. above. This size of high aluminum bricks cannot be used.
You can also see the quality of high alumina brick in terms of volume density. The test method is to use electrons to call the weight of a single brick, and then measure the length, width, height, or size of the high aluminum brick, and then calculate the size The volume, divide the size of the size, is the proportion of high alumina brick. If the proportion is less than 2.3, it proves that it is a third -level high aluminum brick. If the volume density is greater than 2.3, it is a second -level high alumina brick. If the volume density is 2.45 or more , That is a first -class high aluminum brick.
If the aluminum content of refractory bricks is 55%of the aluminum content, it is a third -level high aluminum brick. If it is 65%, it is a second -level high alumina brick. If it is 75% It is necessary to learn after chemical testing. I can’t see it intuitively.
There are also changes in the intensity, heat shock, and heavy -burning lines of fire tiles. They must be known through physical chemistry. The naked eye is invisible.
The heavy softening temperature of the refractory fire brick is also the most important item in the process of use. There are two methods to identify. One is to see the sintering temperature of the high alumina brick. If the sintering temperature is 1380, then the load weight is about 1400. It is 1450, so the weight of the lotus is around 1480. But if the load softening temperature is more accurate, it must be tested.
Under normal circumstances, the quality of high alumina brick is judged from the three intuitive methods of color, size contraction, and physical density. Of course, if the user requires other indicators, it must be inspected to know.
