To provide melting equipment which can prevent the bridging of a cold iron source in a preheating chamber in melting using arc melting equipment having the preheating chamber directly connected to a melting chamber.

The melting equipment 1 has a melting chamber 2 for melting the cold iron source 16, a shaft type preheating chamber 3 which is directly connected to an upper part thereof to preheat the cold iron source, electrodes 6 and 7 for generating arc for melting the cold iron source, a cold iron source supply means 14 which supplies the cold iron source to the preheating chamber so as to keep the cold iron source continuously existing in the melting chamber and the preheating chamber and a gate 10 for running molten steel 17. The cold iron source in the melting chamber is melted by an arc 20 and when a specified amount of the molten steel is accumulated in the melting chamber, the molten steel is started to run while the cold iron source is existing in the melting chamber and the preheating chamber. In the melting equipment thus arranged, the internal surface of the side wall 2b of the melting chamber is curved or made polygonal in shape at a part where the preheating chamber and the melting chamber are directly connected while being inclined gradually tapered toward the bottom part of the melting chamber.