The rock wool board is made of 66% diabase, 20% limestone and 20% coke, melted in a high temperature furnace at 1500-2000℃, sprayed into filaments with a diameter of 0.005 mm, and then pressed into a bulk density of 80 Plates of ~1000 kg/m3. When cooled to about 200°C, phenolic resin is added to reduce the surface tension and make it water-retaining. In 1969, Danish rock wool began to be used in soilless culture, which is a new substrate in soilless culture. Now 80% of the soilless culture substrates in the Netherlands are rock wool. In the world's soilless culture, rock wool cultivation area ranks first
Inorganic fiber board made of rock wool board processed by high temperature melting is a new type of thermal insulation, flame-proof and sound-absorbing material. The artificial inorganic fibers processed by high temperature melting of rock wool board have the characteristics of light weight, low thermal conductivity, heat absorption and non-combustibility. The initial development is a common application type in construction and is mostly used in industrial buildings. It should meet the requirements of "Building Thermal Insulation Materials Application Types and Essential Requirements"