PURPOSE: To provide a small-sized and compact gas combustion type aluminum melting furnace.
CONSTITUTION: A luminous flame type burner 3 is installed downward through the ceiling of a combustion chamber 2 of a box type installed in the opening on the upper surface of an aluminum melting chamber 1 and having opened lower surface. A heat exchanger 6 which consists of a metallic pipe 5 closed at its front end and is divided internally into a forward path and backward path and a flanged main body part 6 holding this metallic pipe 5 in the state of inserting the pipe into a discharge hole 4 and has combustion air inlet and outlet ports 7, 8 communicating with the forward and backward paths described above and a discharge duct connecting port 9 communicating with a discharge hole 4 bored in the side wall of the combustion chamber 2 is mounted at the outer end of this discharge hole 4. As a result, the preheating of the combustion air is executed within the thickness of the side wall of the combustion chamber consisting of refractories and, therefore, a gas reflection type having a large heating up capacity is realized at a low cost even in an aluminum holding furnace of such a relatively small size that the installation space for the heat exchanger for preheating is not secured. atop the combustion chamber.
SAEKI YUKITOSHI
MARUISHI YUKINOBU
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