Transactions . 1, the baris put diagonally across the grates and a hole about 18 in. ( cm.) indiameter is punched through the bed as close to the grates as is extended as a slot parallel to the grates from the center to thecorner. The operation is then repeated through hole 2, care being takento punch all chnker down and mix in as little coke as possible. Throughholes 3 and 4 a corresponding slot is cut on the opposite side of thegrates. Shorter and hghter bars, ^^ in. by 12 ft. 6 in., are then usedthrough holes 5 and 6 to break down the corners where the grates meetthe wall.
Transactions . 1, the baris put diagonally across the grates and a hole about 18 in. ( cm.) indiameter is punched through the bed as close to the grates as is extended as a slot parallel to the grates from the center to thecorner. The operation is then repeated through hole 2, care being takento punch all chnker down and mix in as little coke as possible. Throughholes 3 and 4 a corresponding slot is cut on the opposite side of thegrates. Shorter and hghter bars, ^^ in. by 12 ft. 6 in., are then usedthrough holes 5 and 6 to break down the corners where the grates meetthe wall. Usually at this stage the arm is started rotating, and, if the bed doesnot settle evenly, bars are put through holes 7 and 8. Any large pieces G. S. BROOKS AND C. C. NITCHIE 861 of clinker that may remain on top are picked up by the stirring fingers;these are broken up with hght bars as the arm revolves. Breaking downusually requires about 40 min. for one producer man unaided. Numbers show theOnlor of OiKTiUion. Fig. 8.—Method of breaking down mechanical top producer. Firing.—After the bed is broken down the dampers in the kiln areset properly, the cups placed in the poke holes, and the steam turned full hoppers of coal (about 400 lb.) are dumped when in about 10 min. two more full hoppers are dumped. From thenon the producer is fired every 15 min., about 200 lb. to a charge. The 862 GAS-PRODUCER PRACTICE AT WESTERN ZINC PLANTS producer man watches the fire and, if required, dumps an extra charge inbetween the regular periods. Water Cooling.—The water-cooUng system has been very of the stirring fingers was unscrewed after the producer had been inoperation 2 mo. and it showed practically no deposit. The volume ofwater used is about 9 gal. (34 1.) per min. The temperature of the waterfrom the last overflow is usually 100° to 120° F. (38° to 49° C.) with thewater entering the producer at 40° to 50° F. (4 to 10° C). Maintenance.—
Size: 1201px × 2081px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
