| Show JJIAKING SOME MORE TESTS Captain De Laniar May Use tlC Pe IsvtanClerJci Process in n Mill on the Golden Gate Since his acquisition of the Golden Gate properties in the Camp Floyd district Captain DeLamar has made many tests of the high grade arsenical ore found in them In such abundance for the purpose of determining the proper process of treatment Considerable Consider-able quantities of the ore have been sent to the mill at DeLamar while other shipments have gone to Idaho New York Denver and Chicago To date no decision has been reached as I to the best treatment for the ores but the indications are that the captain will select the PelatanClerJci process a combination of leaching by cyanide and precipitation by electricity Tests of the Golden Gate ore are now being made with the process at Denver and i is not at all unlikely that a plant will speedily be erected for the treatment treat-ment of the ore by the method named Speaking of this new process the Denver Den-ver Republican says The precipitation of gold and silver by electricity from the ore direct has interested scientists for a number of years For several months a party of French mineralogists has been experimenting experi-menting with such a process in this city and with such success as to lead toits adoption in mills for practical operation Tne PelatanCIlerlcl process as it is named after the inventors Is a com bination of leaching by cyanide of potassium and precipitation by an electrical current The ore being first crushed to exceeding fineness is placed In a leaching vat of wood or masonry masonr The bottom of the vat Is a copperplate copper-plate which is connected with the negative pole of a dynamo Through the center of the vat runs a shaft from which radiates arms that serve to keep the contents stirred up as the shaft revolves To this shaft is connected the positive pole of the dynamo The copper Mates in the bottom of the vat are covered with mercury the crushed ore put in with water to hold i in so lution and the usual 50 luton quantity of cyanide cya-nide As the cyanide does is work the shaft revolves and the freed metals are deposited upon the amalgam in the bottom ujon In from eight to ten hours the process does its work so that the ore solution Is ready to be drawn off and after that is done a second vent is opened and the 2 amalgam drains off and is separated In the usual way I is claimed for the new process that it works a saving of time requires fewer vats and consequently a smaller plant and is less expensive than the old cyanide treatment At thq laboratory labora-tory of the < company 1530 Wynkoop street 8 oneton plant has been In operation for several months and many tests have been made on Colorado ores On Gilpin county sulphides the inventors inven-tors claim to have saved 80 per cent Captain J R Le Lamar has been won to the process and a plant to handle fifty tons a day is now being built at De Lamar Idaho to begin operations inside of three weeks The contract is for a mill of 150 tons capacity and the enlargement is to be made early next spring Tests were being made yesterday yester-day on ores from De Lamars mines at Mercur Utah and on Cripple Creek ores If they are successful the I are process pro-cess is to take the place of chlorination chlorina-tion in the mill at Lawrence Colo and be employed in a new plant to be built in Utah An 87 per cent saving is claimed out of the Idaho ores for which the first plant is being erected In that mill stamps and pan amalgamation amalga-mation is being supplanted by the new process Patents of the new process were taken out in the United States on October Oc-tober 23 1894 The original mill was built in Italy about two years ago but the practical evolution of the system has been effected in the laboratory in this city Electricity has been used before as a precipitation for the con tents of copper matte but this is the first recorded case of its successful utilization as a commercial process in precipitating direct from the ores The operation of the Idaho mill will there fore be watched with much Interest |
