Mineral fibres: basalt
The raw material for basalt fibre (andesitic basalt, andesite basalt, diabase and other volcanic rock) belongs to the family of inorganic nonmetallic silicates and is characterized by high Fe 2 O 3 or FeO content. The high Fe 2 O 3 /FeO content in turn leads to a high melt blackness coefficient, poor diathermancy, and the need for high crystallization temperature …
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