Explosion proof fiber

[Explosion-proof fiber] Never neglect this fatal problem! When designing industrial kilns, using refractories and fiber refractories, we must fully consider the operating conditions, economy and durability to select refractories. Explosion-proof fibers, therefore, indispensable refractory characteristics and operating conditions. Even if the characteristics of a refractory, its characteristics are multifaceted, not 100% of the clear correlation with operating conditions. Even if there are still many unclear parts, the technical field which takes the rule of experience as the priority is not exaggerated. Therefore, it needs close consultation and contact between the producer and designer of industrial kiln and refractory producer. Some of the properties of refractories have been mentioned earlier, but they are only general. Table 6 shows the design conditions of industrial kilns and the characteristics of refractories (service conditions). The relationship between design conditions, research items and the properties of refractories to be studied is listed. For particularly important features, use the line below the word. Table 6 is an item that should be studied as a topic when industrial kiln designer and manufacturer contact and negotiate with refractory producer.

The characteristics of refractories have basic characteristics and application characteristics. Basic characteristics are the basic characteristics of refractories, and application characteristics are important because they are related to the use of refractories.

Therefore, it is uncertain whether it is necessary to accurately determine the application characteristics, which can be inferred from the basic characteristics.

Generall, based on the basic characteristics, the refractories suitable for industrial kilns are selected according to the needs and application characteristics.

In the determination of application characteristics, there are many problems related to the cost of measurement, such as the determination conditions, the comparison of object products, the difficulty degree of determination conditions, etc. It is difficult to define all application characteristics. Table 7 lists the main quality characteristics of refractories.

[Explosion-proof fiber] Never neglect this fatal problem! When designing industrial kilns, using refractories and fiber refractories, we must fully consider the operating conditions, economy and durability to select refractories. Explosion-proof fibers, therefore, indispensable refractory characteristics and operating conditions. Even if the characteristics of a refractory, its characteristics are multifaceted, not 100% of the clear correlation with operating conditions. Even if there are still many unclear parts, the technical field which takes the rule of experience as the priority is not exaggerated. Therefore, it needs close consultation and contact between the producer and designer of industrial kiln and refractory producer. Some of the properties of refractories have been mentioned earlier, but they are only general. Table 6 shows the design conditions of industrial kilns and the characteristics of refractories (service conditions). The relationship between design conditions, research items and the properties of refractories to be studied is listed. For particularly important features, use the line below the word. Table 6 is an item that should be studied as a topic when industrial kiln designer and manufacturer contact and negotiate with refractory producer.

The characteristics of refractories have basic characteristics and application characteristics. Basic characteristics are the basic characteristics of refractories, and application characteristics are important because they are related to the use of refractories.

Therefore, it is uncertain whether it is necessary to accurately determine the application characteristics, which can be inferred from the basic characteristics.

Generally, based on the basic characteristics, the refractories suitable for industrial kilns are selected according to the needs and application characteristics.

In the determination of application characteristics, there are many problems related to the cost of measurement, such as the determination conditions, the comparison of object products, the difficulty degree of determination conditions, etc. It is difficult to define all application characteristics. Table 7 lists the main quality characteristics of refractories. Among these features (basic features), the important ones are summarized as follows:

(a) The basic properties of refractories with specific gravity and porosity occupy a certain position, and the specific gravity and porosity become the organization index of refractories.

Indicator: Figure 2 shows a schematic diagram of the structure and structure of refractories.

B) Compressive strength, flexural strength

Refractories are structural materials of industrial kilns. In construction and design of device components, mechanical strength of dagger becomes more important. Ceramic materials including refractories are brittle materials. Especially refractories have to consider the existence of air holes and small cracks in their tissues. These defects are normal for refractories.

These strengths are classified as normal and high temperature strength, sometimes expressed as normal temperature strength and high temperature flexural strength.

C) modulus of elasticity

Deformation occurs when external forces are applied to refractories, but within the elastic limit, the magnitude of deformation is proportional to the external forces. Generally speaking, refractories and ceramics have large modulus of elasticity and multiple values of metal materials. The modulus of elasticity is expressed by the ratio of stress to deformation. Although the deformation of ceramics is small, the modulus of elasticity generally shows a larger value. The elastic modulus of refractories is also used as an index of density, internal defects and thermal shock resistance of refractories.

D) Chemical composition and mineral composition

When expressing the composition of refractories, they are usually expressed by chemical composition, and some of them are also expressed by mineral composition (crystalline phase). Chemical composition is generally used to consider the purity of components, mineral composition is used to discuss the physical properties of refractories. Refractories generally consist of more than 95% mineral phases. The basic properties of refractories are considered as the integral of these mineral phases.

E) thermal conductivity

For high temperature materials including refractories, thermal conductivity is an extremely important performance. According to its use purpose, it can be divided into high thermal conductivity (heat shock resistance) and lowering thermal conductivity (heat insulation) as far as possible. It is indispensable in industrial kiln design. Figure 3 shows the main points

Thermal conductivity of refractories.

F) thermal expansion rate

The thermal expansion rate of refractories is basically determined by the composition of mineral phases, which are controlled by the crystalline structure of crystalline phase. Fig. 4 shows the representative expansion rate of refractories. Among the properties of refractories, it occupies a certain position as an extremely important characteristic and is usually placed in the design of industrial kilns.

Performance of great concern. Generally speaking, low expansion refractories have strong thermal shock resistance, while high expansion refractories have weak thermal shock resistance.

Specific heat capacity of G)

The specific heat capacity of refractories directly affects the heating and cooling rate of industrial furnaces. For industrial furnaces with heat storage function, we think it is an important characteristic value. Refractories with high specific heat rate are generally used as heat exchange media.