Show MASON VALLEY LEASES MAKES MILL AND SMELTER CHANGES with the smelter at thompson functioning perfectly the mason valley mines company under the management of george A kervin is taking steps to further strengthen its position and insure the uninterrupted operation of the plant for an indefinite time says the nevada mining press of the alst 1st capacity of the bluestone flotation mill it is belaev believed ed will be increased largely by installation of a new type of cells of which six are now in operation and the company has leased the yerington M malachite malachite ala chite mine an adjoining property which is relied upon to supply a large tonnage of sulphide ore for the mill malachite leased for five years the lease on the Malchi tc which runs for five years was closed wednesday in reno where the contract was signed by general manager kervin of the mason valley company and grant snyder vice president and manager of the yerington malachite copper company the property joins the mason valley mine of the company and the no 4 transportation level of the mason valley company reaches the dividing property line work will be started within two weeks and the level will be extended to the ore body the yerington malachite shipped tons of ore to the thompson smelter during previous operations that ran per cent copper the ore zone is said to be 1300 feet wide on the surface and is a continuation of the limestone deposits of the mason valle valley y mines new equipment in the mill the new equipment at the mill consists of six macintosh cells replacing another type which have been in operation for ten days these machines have a rotary motion are of greater capacity and require much less power the two strings of three each that have been installed are expected to increase the ore milled by 20 per cent if they come up lo 10 l o the standard established by operation in other plants it is the intention of the company to install nine more to replace callow and janney cells which will give the mill a capacity of 1500 tons per day ratio of concentration at the mill is 13 into one this change was made on the recommendation of john W thompson metallurgical engineer who has had complete charge of the mill since last december thompson has installed and operated the macintosh cells in mexico missouri and at the apex mine at bingham utah new departure in smelting smelling Sm elting concentrates general manager kervin kelvin who harshad has had wide experience in smelting smelling sm elting has established a new departure at thompson in charging flotation concentrates direct to the blast furnace and metallurgical recoveries are excellent the usual practice is to sinter the concentrates and in this preliminary roas roasting ting the heat units contained in the sulphide ores are lost resulting in a large consumption of coke so far as known this is a new departure in smelting smelling sm elting concentrates in blast furnaces the copper ores smelted smelter at the thompson plant are of two types sulphides sulp hides supplied by the Bala kalala mine in shasta county calif and by the companas comp anys flotation mill and oxidized ores from the mason valley mines and other properties in nevada ore sources being broadened Proad ened the territory from which custom ores are drawn extends south to cerro gordo in eastern california cali Calf fornia and to goldfield and beyond in nevada and north and east as far as a battle mountain and beowawe affording 21 a market for ore of a grade 6 too low to permit shipping to distant plants plans are now being considered for the reopening and operation of the macuba copper mine in pershing county 25 miles west of imlay a station on the southern pacific railroad the mine will be either operated on company account or leased and operations will commence by the middle of april humboldt station on the southern pacific is the shipping point distance 17 miles the mine was operated 1916 to 1919 by the mason valley company the product is is an oxidized copper ore carrying small values in silver |