Transactions of the American Institute of Mining Engineers Volume 19 (Paperback)

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. 1891 Excerpt: ...Kid-lining in such a way that I he presence of free chlorine can lie ascertained at my moment, and no charge subject to chlorination need be thrown on the filter tithout full knowledge of the work being complete. The cast-or sheet-iron cylinder (chlorinator) is 42 inches in diameter by 60 nches long. The heads are cast and securely bolted (o end-flanges and provided rith tight and loose pulleys. The bung for the introduction of the roasted ore and hernials, 6 inches in diameter, is provided with a lead-lined cover, which, before oution, must be closed hermetically. The interior of the cylinder is lined with sheet-lead of 10 to 12 pounds per quare foot. The capacity of the chlorinator is from 1 to 1 tons of roasted ore. lefore introducing the ore, the chlorinator is charged with from 100 to 125 gallons f water, or, I might say, with enough water to make an easy-flowing pulp. This one, the roasted ore is introduced, half the requisite quantity of sulphuric acid is len poured in, and lastly, half the required chloride of lime, w hen the bung-hole iclosed and the chlorinator is set in motion at the rate of fifteen revolutions per linnte. For Phoenix ores I used 40 pounds of chloride of lime and 50 pounds of eomlercia sulphuric acid per ton of roasted ore; but I charge 20 pounds of chloride f lime and 25 pounds of acid first, rotate for three or four hours, open the hung id charge the other half, having found better results by dividing the chemicals. Rotate for two or three hours longer, and if, by the aid of the bad valve, free dorine is found present, the cover is removed from the bung-hole and the chlo ated ore is thrown on a shallow filler, (1 by 8 feet, provided with a 5-inch lilter d, over which the pulp spreads to a thickness of about 4 inches. The f..