Bulletin . as recently beenmade with a diameter of 30 feet. (PI. XV.) Pans 10 to 20 feet in diameter usually measure 30 to 50 feet fromtip to tip of the end cones (see Pis. XVI and XVII and fig. 5), andtherefore they have to be tended from different floors. The steam belt is placed in the cylindrical part of the effect. Itconsists of a ring-shaped belt of several hundred vertical copper tubesabout 5 feet long and 2 inches in diameter. The warm brine from the preheating or settling tanks b enters thepan at different places in various makes of pan. At Silver Springs,X. Y., the brine enters near
Bulletin . as recently beenmade with a diameter of 30 feet. (PI. XV.) Pans 10 to 20 feet in diameter usually measure 30 to 50 feet fromtip to tip of the end cones (see Pis. XVI and XVII and fig. 5), andtherefore they have to be tended from different floors. The steam belt is placed in the cylindrical part of the effect. Itconsists of a ring-shaped belt of several hundred vertical copper tubesabout 5 feet long and 2 inches in diameter. The warm brine from the preheating or settling tanks b enters thepan at different places in various makes of pan. At Silver Springs,X. Y., the brine enters near the 14-inch gate valve. (See fig. 5.)At Del Ray, Mich., the brine enters about 6 feet above the salt outlet,and the salt is thus washed with a solution of pure brine. At another a Specific points in construction are given in the descriptions of individual makes of pans in Cold brine goes to the vacuum pan at one plant in Ohio, but this is very unusual. BUREAU OF MINES BULLETIN 146 PLATE XV. THIRTY-FOOT PAN (LARGEST IN THE WORLD AND CAPABLE OF PRODUCING IN TRIPLEEFFECT 1,000 TONS OF SALT A DAY. LOWER CONE, STEAM BELT, TAPER PLATES,AND COLUMNS, INVERTED ON ERECTING FLOOR. WORKMEN PUT ON TO SHOW PRO-PORTIONS. (COURTESr OF MANISTEE IRON WORKS, MANISTEE, MICH.,) VACUUM-PAN PROCESS. 103 Water supply Condenser
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectminesandmineralresou
