California State Mining Bureau · Sacramento : California State Mining Bureau · leaf 240
d in order to keepthe temperature of the gases above 600° F. while going through theCottrell dust precipitator which follows. The central column and therabble arms are air-cooled, the resulting hot air being utilized for con-centrate drying and other purposes. A Brown recording pyrometer SANTA… … Photo No. 22. Top, or Drying-hearth, of Herreschoff Furnace. Feed hopper is seen inupper part. Photo by W. W. Bradley. some accumulation of dust was at first obtained in the condensers. Tocorrect this and keep the dust from passing into the condensers, a Cot-trell fume precipitator, called the hot…
Mines and mineral resources · Gold mines and mining · Mineralogy
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