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Show SANDSTONE MINING NOTES. The New Leaching: Works About Completed Other Heef Notes. The Christy Company produced 19,000 ounces of silver last month. The Christy Co. is at present doing the assessment work on eight different unpatented un-patented claims in camp. Grant & Hall shipped sixty tons of fair grade ore from the old Leeds mine to the Christy mill last week. The roads to the Stormont mill are again in a good condition, and the regular quantity of ore is heing crushed. Deputy U. S. Surveyor, Browne, of Salt Lake City, made a survey of the Kinner i mine, last week, for the purpose of apply-1 ing for a patent for E. Austin, of the London Bank. The new leaching ' works, now almost completed, Will begin operations next week. They are situated a mile southwest south-west of town, and the plant, occupying the greater part of the building, is the most perfect of any in the Territory. A brief description of the works and process pro-cess is of deep . interest to our readers. The ore, after passing through a rock breaker, runs down through a hopper to a pair of Cornish rolls fourteen inches in j width by eighteen in diameter, where it is I reduced to pulp fine enough to pass I through a twenty-mesh screen, where it j is received by an elevator and emptied into in-to bins above the leaching tanks, The bins are provided with chutes, so that the tanks may be charged by pressing a lever. ' The tanks, ten in number, are 4x10 feet, ! ana are or about ten tons capacity. The pulp is first treated to a bath of sulphate of copper; after standing six hours it is covered with a solution of 113'posulphite of soda; six hours more completes the leaching and the second liquor is drawn off and the solvent conducted through pipes to the precipitating; these pans have perforated false bottoms above the real bottom, that permits the solvent to escape, but retains the pulp. After the solvent is drawn off, a stream of water under a twenty-foot pressure, is turned into the pans, a valve opening into a flume at the bottom of each is opened and the tailings are sluiced out. The precipitating pans, three in number, are of considerable capacity. When the solvent is in these pans the sulphate of calcium is added which precipitates the silver in the the form of sulphides ; after during its work, if runs into a reservoir from which it is pumped back to the solvent sol-vent tank above the rolls and used again ; next is the drying and pressing of the sulphides for market. The entire process requires' about eighteen hours. The company com-pany has 30,000 tons of tailings on hand. The machinery is run by a forty-horse power engine. The best of material has been used and the works constructed in a most (substantial manner indicating that the projectors of the enterprise, Messrs. G. L. Harding & Co., have an abiding faith in its success. The managers are reticent as to the terms they will offer chloriders but it is their intention, to buy the ore they work: We are authorized to say that fifteen-ounce ore can be worked at a profit to the miner, as from, sixty to seventy-five tons can be reduced every twenty-four hours. |