Transactions . es, giving a greater efficiency and capacity. Installation at Roast Kilns at Depue.—The producer originally was a7 by 9 ft. ( by m.) rectangle inside a round steel shell 12 ft. 3 in.( m.) in diameter, as shown on Fig. 3. This illustration shows twoblowers, but all producers are operated with one blower. The old brickswere torn out and the shell lined with a firebrick wall about 12 in. (30cm.) thick, as shown in Fig. 7. The grates are of the A type with 1in. ( cm.) slots, see Fig. 5, and extend lengthwise of the originalrectangle. Blank grates were added to increase


Transactions . es, giving a greater efficiency and capacity. Installation at Roast Kilns at Depue.—The producer originally was a7 by 9 ft. ( by m.) rectangle inside a round steel shell 12 ft. 3 in.( m.) in diameter, as shown on Fig. 3. This illustration shows twoblowers, but all producers are operated with one blower. The old brickswere torn out and the shell lined with a firebrick wall about 12 in. (30cm.) thick, as shown in Fig. 7. The grates are of the A type with 1in. ( cm.) slots, see Fig. 5, and extend lengthwise of the originalrectangle. Blank grates were added to increase the length to 10 ft. 3 in.( m.). The grates were blanked off 16 in. ( cm.) on each end,leaving seven open grate castings on each side. The following is thepresent practice used in operating the mechanical-top producer. Labor.—Originally, there were two producer men on the first the softening of the clinker and the adoption of better methods, 858 GAS-PRODUCER PRACTICK AT WESTERN ZINC PLANTS. VIEW SHOWING LUG ON WORMWHEEL FOR DRIVING SCREWAgitator moves up & according to?he force required to revolvethe agitator thru the fire bed llemo-able stirring fingerswater cooled and made ofhigh carbon steel Manhole ^ provided fcimaking rapainon slicing tube Fia. 6.—Floatinq agitator and feed foe stationaby gas producer. G. S. BROOKS AND C. C. NITCHIE 859 the labor of breaking down decreased, until it was possible to carrybut one man on the first shift. There are three 8-hr. shifts of one man


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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries