Annual report of the State Mineralogist for the year ending ... . Fig 35~.. die by an aperture, over which is placed the hopper K. At either sideare three doors F F F. Through those at the front, the rabbling, etc., isdone, while those at the back serve to withdraw the slags. They alsoserve for the admission of air when required. Dampers placed in the flues regulate the draught. Below the middledoor on the front side is the tap-hole through which the reduced metalrlows into the receptacle H. The fuel is fed from the rear through adoor represented in Fig. 36. Over the ash pit is built a short f
Annual report of the State Mineralogist for the year ending ... . Fig 35~.. die by an aperture, over which is placed the hopper K. At either sideare three doors F F F. Through those at the front, the rabbling, etc., isdone, while those at the back serve to withdraw the slags. They alsoserve for the admission of air when required. Dampers placed in the flues regulate the draught. Below the middledoor on the front side is the tap-hole through which the reduced metalrlows into the receptacle H. The fuel is fed from the rear through adoor represented in Fig. 36. Over the ash pit is built a short flue,,which carries off any fumes passing that way. Under the entire length of the furnace runs an arched vault, com-municating with the atmosphere at both ends. Upon this arch is laidthe first course of brickwork—the cramp course—upon which is con-structed the concave hearth bottom sloping from the sides towards thetap-hole. The working bottom proper is formed of gray slag obtainedin a previous smelting operation in a similar furnace. This is brokenup into small piec
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Keywords: ., bookcentury1800, booksubjectgeology, booksubjectminesandmineralr
