Method for producing E glass fibers from unprocessed mineral material

The invention relates to a method for producing E-glass fibers having a target composition, comprising melting a raw material mixture forming a melt, comprising at least one calcium source selected from the group consisting of mixed oxides of calcium and at least one element selected from the group consisting of Si and Al, in particular calcium silicate and/or calcium aluminosilicate, said one or more calcium sources being natural mineral materials, in particular calcium silicate and/or calcium aluminosilicate. , unprocessed mineral material derived from a natural geological environment. 本发明涉及制造具有目标组成的E玻璃纤维的方法，其包括熔融构成熔体的原材料混合物，其包含至少一种钙源，所述钙源选自钙与选自Si和Al的至少一种元素的混合氧化物，特别是硅酸钙和/或铝钙硅酸盐，所述一种或多种钙源是天然矿物材料，即源自天然地质环境的未加工矿物材料。