how to distinguish basalt rock wool and slag wool

Basalt rock wool and slag wool are both common insulation material in the market.The quality and price of Basalt rock wool is higher than slag wool,these two kind of  materials are easy to confuse peoples,so here will introduce how to distinguish basalt rock wool and slag wool.

Following is the common way to distinguish basalt rock wool and slag wool.

1. Raw material

The main raw material of basalt rock wool is basalt, diabase ,dolomite etc.

The main raw material of slag wool is slags.

2. acidity coefficient

The acidity coefficient of  basalt rock wool  is bigger than 1.6,but slag wool is only around 1.2 to 1.6.

3. Appearance

Slag wool is unconsolidated,the contend of black shot is high,it’s prickly and itching.

basalt rock wool is yellowish green,the contend of black shot is bare.

In Summary,regarding above three methods,it need to go to factory to see raw materials;It need professional knowledge and rich experience to distinguish.So the main method to distinguish is to test acidity coefficient.