1. The raw materials used in the production process are different. Slag wool is abbreviated as mineral wool, and its main raw materials are metallurgical slag and other industrial waste residues and coke. The main raw materials of rock wool are natural rocks such as basalt and diabase.

2. The physical characteristics are different. Due to the different raw materials, their physical properties are also different. In general, the acidity coefficient of slag wool is about 1.1-1.4, while the acidity coefficient of rock wool is about 1.4-2.0. Due to the low acidity coefficient of slag wool, it also contains more alkaline oxides. There is a certain hydraulic activity in mineral wool, which is much different from rock wool. Therefore, ordinary slag wool cannot be used for thermal insulation of building exterior walls.

3. The effect is different. Rock wool does not contain free sulfur, the content of slag ball is far lower than mineral wool, and rock wool products mostly use hydrophobic resin as the binder. The resin has a high curing degree, so the moisture absorption rate is low, and the water resistance is higher than mineral wool. The maximum operating temperature of mineral wool is 600-650 degrees Celsius. Generally, the fiber of the product is shorter and thicker. The maximum operating temperature of rock wool can reach 900-1000 degrees Celsius, the fiber is long, and the chemical durability is better than mineral wool, but the production cost of rock wool is higher than mineral wool.

4. The production process is different. The production process of rock wool products is to directly heat basalt or diabase and a small amount of dolomite, limestone or fluorite and other additives into a molten state at a high temperature of 1400-1500 degrees Celsius in a cupola, and then make fibers through a four-roll centrifuge. At the same time, water-soluble resin or organic silicon and other binders are sprayed on the surface of the fiber, and then formed by sedimentation and pressure. The mineral wool is mainly slag from blast furnace iron smelting, with a certain amount of limestone or dolomite and broken bricks. It is melted in a cupola or cellar at a temperature slightly lower than the melting temperature of the rock wool, using injection or centrifugal method. To make it fiberized, the slag balls and impurities in the fiber are selected by winnowing or water.