As a common thermal insulation material, rock wool is widely used in the fields of thermal insulation such as construction and industry. At present, the rock wool often seen in the market is earth yellow, in addition to earth yellow rock wool, there is a black rock wool. So, is rock wool black or yellow better? This article will give an in-depth analysis of these two colors of rockwool from multiple perspectives to help readers better understand their advantages and disadvantages.

First, let's understand what rock wool is.

Rock wool is made of basalt, pyroxene and other natural ores after crushing, grinding and other treatment, and then the prepared raw materials into the high-temperature furnace, melting into a molten state, and then through the pendulum method to melt the molten state of the mineral fibrosis. Finally, it is made by collecting and curing. This is how ordinary yellow rockwool is made.

The process of making black rockwool is the same as that of making yellow rockwool. The only difference is the mix of raw materials. In addition to the original ore, a certain amount of hematite is added, because the color of hematite is black and the melting point is higher, so the produced rock wool is black.

The biggest difference between black rockwool and yellow rockwool is fire resistance. The fire resistance of black rockwool is better than that of yellow rockwool. The high temperature resistance of black rockwool can reach 1000℃, while the high temperature resistance of yellow rockwool can only reach 800℃. Therefore, black rock wool is generally used in high-strength insulation occasions, such as high temperature furnace, petrochemical and other fields, black rock wool may be more popular. Yellow rock wool is generally used in ordinary thermal insulation occasions, such as building insulation, pipeline insulation and so on.

Black rockwool and yellow rockwool each have their own advantages and application scenarios. When choosing rock wool products, we need to make comprehensive consideration according to the specific application needs and scenarios. If insulation performance is the primary consideration, then yellow rockwool may be more suitable; If fire resistance is more important, then black rockwool may be ideal.