国产 日韩 无码 av_久久精品国产国产日韩_香港三级理论在线观看网站_欧美爱三级日韩久久_亚洲另类在线视频_自拍偷拍精品综合_精品无码AV福利网_a级毛片免费观无码毛片_亚洲成人免费av在线_宅男香蕉黄色视频

EN
新聞中心
What are the characteristics of refractory bricks?
2020-01-13 company news

Refractory brick's own properties

1. Chemical composition: The main ingredients determine the quality and characteristics of the refractory

2. Bulk density: weight per unit volume, high density, indicating good compactness, high strength, but high thermal conductivity

3. Apparent porosity: There are no specific requirements, but the manufacturer must strictly control the apparent porosity.

4. Load softening temperature: It is also called the temperature at which the high-temperature load begins to deform. This parameter is very important, which indicates that the material is resistant to high temperatures.

5. Thermal shock resistance: resistance to rapid temperature changes without being destroyed

6, compressive strength: the ability to withstand the maximum pressure (normal temperature)

7. Flexural strength: ability to withstand shear pressure

8. Linear change rate: also called reburning line change or residual line change, refers to the change in volume expansion and contraction each time the same temperature changes, if each expansion and contraction is the same, we define this linear change rate to 0

 Physicochemical properties of refractory bricks

1, abrasion resistance:

2. Thermal conductivity: under the condition of unit temperature gradient, the heat flow rate per unit area of ??the material is related to the porosity

3. Impact resistance: no need to explain it, the impact resistance is good, and the service life is long

4. Resistance to slag: ability to resist slag erosion without being destroyed at high temperature