Manufacturing Process Of Rock Wool Boards

1. Raw Material Preparation

The main raw materials for rock wool boards are natural rocks such as basalt and diabase. Sometimes, a certain proportion of industrial waste (such as blast furnace slag) is added to reduce costs. These raw materials need to be screened and crushed to ensure uniform particle size.

 

2. High-Temperature Melting

The raw materials are fed into a high-temperature electric furnace or cupola furnace, where they are melted into liquid magma at approximately 1500℃. This process requires precise temperature control to ensure the fluidity and uniformity of the magma.

 

3. Fiberization Treatment

The molten magma is stretched into a fine fibrous structure using centrifugal equipment or blowing technology. The fiber diameter is typically between 4-7 micrometers, and the degree of fiberization directly affects the performance of the rock wool board.

 

4. Curing and Shaping

The fibers are stacked into a uniform felt-like structure on a conveyor belt, and a binder (such as phenolic resin) is sprayed on to enhance the bonding force between the fibers. Subsequently, the fiber felt is pressed into a board shape using a hot-pressing process and then cured.

 

5. Cutting and Packaging

After curing, the rock wool boards are cut into finished products of different sizes and thicknesses according to requirements, then packaged and quality inspected, ready for market release.

This manufacturing process ensures that the rock wool boards have good structural stability and consistent performance, while also reflecting their environmentally friendly characteristics, as the raw materials used in the production process are mostly natural minerals or recyclable materials.