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Show The extracted ore was loaded on eight 34-ton Euclid pit or dump trucks, powered by two Diesel engines of 190 h.p. each and on three 22-ton trucks which transported it to the hopper. All equipment at the mine was Diesel- powered and installations also included nine Gardner-Denver WBK-500 Diesel portable compressors and two WBH electric compressors. From the maw of the hopper the ore was swallowed into a large reciprocating pan underneath which fed it into the enormous crusher growling away below. Installed in less than two months, the crusher was a jaw type 66" by 84". The ore fines were first dropped onto a 60-inch conveyor belt and then the oversizes passed through the crusher at the rate of approximately 1,000 tons an hour. From the crusher the belt conveyed the ore upward to a screening tower about 80 feet high. Here were two units of tripledeck vibrating screens operated by a fly-wheel with counterweights. From the screening tower the ore dropped into a stock pile. Gates every 20 feet or so below this were opened to feed the ore onto another conveyor belt stretching through an underground tunnel supported by large wooden forms. The belt then emerged from under a road nearby and conveyed the ore to a truck loading hopper. Driving under this hopper for loading were a fleet of 19 highway trucks consisting of Kenworth tractors with Fruehauf trailers. These yellow monsters which cost approximately $50, 000 each had a capacity of 60-tons each, and of 300 h.p. Hauling the ore from the mine to the port, the fleet made about 117 trips a day with each trip taking about one-and-one half hours including loading and unloading. As stated, the ore was conveyed by truck to an unloading hopper situated on the top of a hill overlooking the bay. There it went down through a metal gate to another stockpile. A conveyor tunnel, similar to the one at the mine extended beneath this with the ore dropped onto a conveyor belt by means of a reciprocating feeder and then carried out to the pier for loading on ships There were eight conveyor belts in all at that time at the mine and the port with the total length measuring 3,575 feet. Manufactured by Goodrich Rubber Company, the belts ran as troughing rollers mounted on structural steel frames and trusses. Varying in width from 30 to 60 inches, the belts of heavy rubber were driven by electric motors which drove pulleys at the head of each conveyor system. Three more conveyor belts were installed later as well as adding two extensions to the present system. Marcona and Affiliates - To carry out the development of the port and mine, the Utah Construction Company and the Cyprus Mines Corporation associated to form a new corporation in Peru known as the Marcona Mining Company. Mr. A. D. Christensen was President, Mr. Harlan. A. "Walker was Vice President and General Manager, and Mr. Harvey S. Mudd, President of Cyprus Mines, was a director of Marcona |
