This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
鏋 is a rare character combining 金 (metal) with 㒼, which likely contributes a phonetic element. The exact historical development is uncertain.
The left side is metal 金, and the right side 㒼 looks like a covered container. Picture a rare metal object whose purpose is unclear, like an ancient sealed vessel.
For バン, imagine a metal bun (バン) shaped like the right component 㒼, a round covered bread made of precious gold.