The slag ball content of ceramic fiber cotton has a great influence on the thermal insulation effect. Slag ball refers to the short fiber, granular debris in fiber cotton, and its existence will reduce the thermal insulation performance of fiber cotton. Specific impacts are as follows:

1. Increased thermal conductivity: The presence of slag balls will increase the thermal conductivity of fiber cotton, resulting in easier conduction of heat, thereby reducing the thermal insulation effect.

2. Increased density: The presence of slag balls will increase the density of fiber cotton, resulting in a decrease in the porosity of fiber cotton, which will affect the thermal insulation performance of fiber cotton.

3. Reduced heat capacity: the slag ball has a lower heat capacity than the fiber cotton, so the existence of the slag ball will reduce the total heat capacity of the fiber cotton, so that its heat absorption and release ability is weakened.

4. Reduced fire resistance: the slag ball may contain more organic substances, which are easy to burn at high temperatures, resulting in a decline in the fire resistance of fiber cotton.

Therefore, in order to improve the thermal insulation effect of ceramic fiber cotton, it is necessary to reduce the content of slag balls as much as possible. This can be achieved by optimizing the production process and screening the raw materials of fiber cotton.