The effect of the colemanite on the melting properties of rock glass wool

Colemanite, as a new environmentally friendly raw material for providing boron oxide, was used to promote the melting of glass during rock wool production. The sintering properties were improved dramatically when 3·0 wt% of B 2 O 3 was added into the rock wool through the addition of colemanite. More importantly, the high-temperature viscosity of the quenched glasses exhibited significant variation among the samples doped with different concentrations of B 2 O 3 . Since thermal insulation is the most important application of rock wool, the structural properties, such as the tensile strength and chemical stability, were also investigated in this study.