Rockwool, rockwool insulation material has been welcomed and loved by people in recent years. According to different classification methods, it can be divided into rockwool panels, rock wool tube, rockwool batts, rockwool sound insulation, rockwool comfortboard and so on.
The rock wool insulation using high-quality basalt as the main raw material. After melting at a temperature of above 1450 °C, the four-roller centrifugal cotton process is used to pull the Xuanwu cotton rock’s high-temperature solution into a discontinuous fiber of 4-7 μm. A certain amount of binder, dustproofing agent and water repellent agent are added to the rockwool fiber, and after being subjected to sedimentation, solidification, cutting and so on, a series of products have different densities are prepared according to different uses.In the later market, due to the high cost of basalt, manufacturers have adopted slag (boiler waste from power plants) instead of basalt for production. People define it as “mineral cotton”, and it is still referred to as “rock wool” in the market. Therefore, often the price of rock wool of some manufacturers is extremely low.
At present, most manufacturers produce them by using materials mixed “slag” and “basalt”.