| 摘要 |
PURPOSE:To prevent deformation and damage of a metallic net and provide a burner with a wide range of combustion adjustment by providing a metallic net in tight contact with a burner head which has a plurality of flame holes and spraying molten metal to the net. CONSTITUTION:Around the main stream of a pre-mix gas opposite to flame holes 2 an auxiliary flow through the net holes of a metallic net 3 is developed to form n auxiliary flame B. This auxiliary flame B is not blown off and has a high flame retaining capability, because the pre-mix gas for the auxiliary flame B has a low blowing velocity and the flame is formed on the net face. On the other hand, since the blowing sped of the pre-mix gas becomes low during low burning, both the flame A and auxiliary flame B burn on the face of the net 3. However, since the tight contact between the burner head 1 and the net 3 is highly improved and they become substantially one body, making it easy to conduct heat on the face of the net 3 to the burner head 1, the temperature of the net 3 does not rise extremely high.
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