Abstract: The invention relates to equipment for refining a load of silicon(s) that comprises a crucible (5) including at least one sole (20) made of a first refractory material having good heat conductivity, means (26, 28) for cooling the sole, a protection member (30) made of at least a second refractory material having low heat conductivity and to be provided between the crucible and the load, and induction heating means (23, 24) of the load including a winding (23) provided in or under the sole.

Abstract: Cold cage for a crucible with melting by high frequency electromagnetic induction comprising in per se known manner a series of hollow segments traversed by the cooling water and surrounded by a high or medium frequency induction coil and in which the products to be melted are confined, wherein at least part of the walls of each cage segment is constituted by at least two layers of adjacent materials, whereof the one which resists corrosion is in contact with the products to be melted and whereof the other is a good electricity conductor and wherein the relative thicknesses of these layers as well as the supply frequency of the induction coil are chosen in such a way that the eddy currents induced in the cage mainly develop in a good electricity conducting layer.

Abstract: The novel inductor is used in a glass fiber manufacturing equipment comprising a centrifuge heated by a main gas heating device and a complementary induction heating device. The efficiency of the inductor is increased by a magnetic flow guiding element disposed between the inductor and the main heating device. The invention is particularly adapted to be used in the manufacture of glass wool.