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What are the physical and chemical indexes of refractories included
  • Time:Apr 14, 2023
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We generally analyze the quality of refractory materials through the physical and chemical indicators of refractory materials, so it is very important to understand the physical and chemical indicators of refractory materials. The following is a detailed introduction to the physical and chemical indicators of refractory materials.

The physical and chemical indexes of refractories usually include the following aspects:

1, Refractoriness: refractory materials at high temperature to maintain the stability of the chemical and physical properties, this is one of the most important refractory index.

2, Compression Strength: refractory materials need to have high compressive strength, in order to support the weight and working load of equipment such as kiln.

3. Density: The higher the density of refractory material, generally speaking, the higher its refractories and compressive strength.

4. Water Absorption: The low water absorption rate of refractories can reduce the damage caused by water inhalation in the use of refractories.

5, Coefficient of Thermal Expansion: refractory materials will be deformed at high temperature because of thermal expansion, this index can evaluate its thermal expansion performance.

6, Acid Resistance: refractory materials need to have good corrosion resistance, in order to prevent damage caused by chemical substances and molten substances erosion.

7, Thermal Conductivity: The thermal conductivity of refractory materials affects its heat exchange efficiency and energy consumption in use.

8, Thermal Shock Resistance: refractory materials at high temperature under the condition of sudden cooling or heating temperature stress, resulting in cracking, peeling phenomenon, thus affecting its service life.

9. Alumina Content: percentage of alumina in total weight.

10. Abrasion Resistance: Abrasion resistance of refractory material.

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11, heat resistance shock resistance: refractory materials at high temperature suffer sudden cooling or heating of thermal stress.

12. Combustibility: whether the refractory material itself can burn easily.

13. Nitrogen Content: percentage of nitrogen in total weight.

14. Sulfur Content: sulfur percentage in total weight.

15. Phosphorus Content: the percentage of total weight.

16. Chromium Content: Percentage of the total weight of chromium.

17. Manganese Content: Percentage of total weight.

18. Magnesium Content: the percentage of magnesium to total weight.

19. Calcium Content: the percentage of calcium in total weight.

20, Aluminium Content: percentage of total weight.

21. Silicon Content: Percentage of the total weight of silicon.

22. Titanium Content: Percentage of total weight titanium.

23. Carbon Content: Carbon as a percentage of total weight.

24, Fluorine Content: fluorine in total weight percentage.

25. Boron Content: Percentage of total weight produced by boron.

26, Zirconium Content: percent of total weight of zirconium.

27. Tungsten Content: Percent of total weight.

28. Platinum Content: Platinum percentage of total weight.

29, Iron Content: The percentage of the total weight of iron.

30. Copper Content: The percentage of copper in the total weight.

31, Silver Content: Silver percentage of total weight.
Different refractories may involve different physical and chemical indexes, need to judge and evaluate according to the specific situation. By evaluating these indexes, the quality and suitability of refractory materials can be judged, so that suitable refractory materials can be selected for the construction, maintenance and repair of industrial equipment.

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