This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1909 Excerpt: ...to that of A A takes place in B, the clarified water again going back to the mill reservoir, 83 gallons per minute, leaving 47 gallons of pulp per minute going into the solution chamber b. Here the pulp is brought into contact with cyanide solution, agitated by means of compressed air introduced in pipes and also by ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1909 Excerpt: ...to that of A A takes place in B, the clarified water again going back to the mill reservoir, 83 gallons per minute, leaving 47 gallons of pulp per minute going into the solution chamber b. Here the pulp is brought into contact with cyanide solution, agitated by means of compressed air introduced in pipes and also by revolving arms. From this it passes to C, where the cyanide solution goes to extraction boxes, and so on through the cycle until the residue is finally discharged from E, as in the diagram. The capacity of each of the vats (20 feet in diameter) is 19,635 gallons. 1152. Slime Treatment In Arizona.--At Washington, Arizona,30 a 100-ton concentrating plant was run during the year 1903 without any running or surface water in sight. The water supply was accumulated in large storage tanks. While the plant was in operation, the water was in constant circulation, being alternately fouled and cleaned of both acid and slimes. In order to keep the plant running, it was necessary to minimize all water losses. The scheme about to be described saved and returned to the mill circulation 97% of the water used. The water used in the mill was derived from a well capable of supplying but 7,500 gallons per day in the dry season. The nine Wilfley tables required, in feed and wash water, 900 tons of water per day or 216,000 gallons. The table floor was laid in cement draining toward the center. Five percent of the ore was taken out as lead concentrates, which after being sacked and drained retained 15% water, making a loss of 0.75 tons of water per 24-hour day. The water remaining in the zinc concentrate caused a further loss of 3.75 tons of water per day, leaving 214,900 gallons discharging through the main launder, the recovery of which is the question at poin...
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