Show THE BAMBERGER DE LAMAR description of the new tailings plant built by this company lode de lamar nev the above companas comp anys new mill now nearing completion is designed to treat tons of tailings daily the building is situated on a gradually sloping hillside occupying an area of feet by feet the equipment being arranged on four levels permitting a gravity flow throughout the tailings will be scraped by means of wheel scrapers to a small hopper above a mixing box situated on the side of the dump A five horsepower motor supplies the power for operating the mixer into which a stream of diluted cyanide solution is constantly delivered by a no 6 centrifugal pump the product from the mixer consisting of sands slimes and solution flows feet through a wooden launder to the separating and leaching tanks on the upper level of the mill there are fifteen of the above tanks constructed ted of sheet steel having a capacity of 65 tons of sand the upper part of these tanks are riveted cone shaped the pulp enters the cone and the slimes and solution overflow while the sands settle through a neck to the sand vat directly below after the tank is charged with sand it is subjected to a short leaching followed by washings with a diluted solution and water the final moisture being drawn off by vacuum after which the sands are discharged through from bottom discharge doors into two ton cars arranged to run in trains the overflow from the separating cone is distributed to eight or twelve slime tanks located on the next level the slime tanks are of wood sixteen feet in diameter eight feet vertical staves with a fifty degree cone bottom the overflow from these consisting of clear solution is taken off continually by means of a peripheral weirs and flows to a sump from whence it is pumped back to the mixer to again traverse the same journey thus being named the circulating solution the flow of the slime or clarifying tanks is arranged so that they are filled at successive periods while one is filling another is settling or being washed or discharged the slimes are allowed to settle for a short time and then the clear solution is decanted by means of a 3 inch pipe to two gold solution storage tanks thirty feet in diameter and eight feet high located on the third level after having decanted the clear solution the slimes are washed with water entering through from pipes near the bottom of the cone and by means of a hose agitating the slimes from above having completed the washing they are again settled and the wash water is drained to the overflow sump entering the circulating solution and taking the place of the solution originally drawn off for precipitation thus keeping the volume of the circulating solution constantly the slimes stilt still being of such a consistency that they flow easily and are discharged through six inch openings at the bottom of the tanks into launders conveying them to the slime settling dam where an additional adit ional amount of water is recovered and returned to the mill besides taking the gold bearing solution decanted from the slime clarifying tanks the gold storage tanks receive the teachings leach ings from the sand vats on the upper level which are precipitated on zinc shavings contained in twenty wooden ten compartment zinc precipitating boxes directly below the zinc box floor are the sumps bumps from which barren solution is pumped for leaching the sands and filling the sand tanks before charging all of the power for driving the pumps and machinery is transmitted by means of electric motors will not exceed horsepower per hour the machinery consisting of mixer pumps and motors in constant use are installed in duplicate thus avoiding the necessity of shutting down to make repairs the mill is airy and well lighted with are arc and incandescent lights and a feature of its appearance is the compactness and convenience shown in the general arrangement |