| 摘要 |
<p>The roof of a top-charge direct arc melting furnace is supported from the superstructure of a gantry frame structure and, if desired, with the furnace back plate assembly serving as the pillar or upright frame member on one side of the furnace body. This gantry or bridge-like structure is supported on a support platform extending alongside the furnace body, and, in certain embodiments, fore-and-aft platform members on opposite sides of the furnace body are interconnected at their front ends by a cross member into a U-shaped platform. The support platform and gantry structure constitute an assembly which is tiltable independently of the furnace body when the roof of the furnace is lifted, so as to uncover the furnace, thereby permitting it to be charged from the top. Means are provided so as to detachably interlock the support platform of the roof supporting gantry-platform assembly with the furnace body so that with the roof closed the furnace body together with the roof tilt in unison, either rearwardly for slag removal or forwardly for pouring. As a safety feature, the interlock means also serves to lock the furnace body or shell to a fixed part of the furnace pit until such time as the furnace shell or body is fully interlocked with the gantry support platform.</p> |
