shelf-furnacen. a continuous fine-ore furnace with inclined shelving for the reduction of mercury ores.
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1887 J. A. Phillips & H. BauermanElem. Metallurgy 553 The Hasenclever-Helbig shelf-furnace, in which a series of inclined shelves, placed on the opposite walls of a vertical shaft, retard the descent of a column of somewhat finely divided ore.