| 摘要 |
<p>A burner block (12) for mounting a burner (14) within a furnace containing a melt to be heated by the burner. The burner block comprises a body (20) having a passageway (22) terminating in a divergent opening (24). The passageway is configured to receive the burner so that the burner is recessed within the divergent opening (24) and a flame (16) produced by the burner is directed out of the divergent opening and over the melt (18). The divergent opening has a lower section (26) angled in a downward direction and the lower section has a reversed step (28) to produce a primary recirculation zone (A) beneath the flame, thereby to draw the flame in a downward direction toward the melt. The reversed step is positioned within the divergent opening so that when the burner is in use, a secondary recirculation zone (B) forms between the opening and the melt and further draws the flame in the downward direction toward the melt. The height of this secondary recirculation zone will vary with the height of the melt within the furnace to produce a self adjustment of the flame toward the melt. In another aspect, the present invention relates to a furnace incorporating the aforesaid burner block, a burner positioned within the burner block and a melt.</p> |
