Mining In Japan 1909 PDF Download

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1909 edition. Excerpt: ...composed by many irregular veinlets is found in considerably variable widths from only half a foot to sixty feet in the broadest parts, in the country rock of the Tertiary tuff. Each veinlet consists of quartz, in which copper pyrite, zincblcnde, galena and iron pyrite arc disseminated. The contents of the ore are 0.00438 per cent. gold, 0.0043 per cent. silver and 1.2.") per cent, copper. A winding engine is operated by a portable boiler, and a pulsometer is used for the underground drainage. The mine stuff is spalled and sorted into small ore, fine ore, and grain ore, the small ore being washed in water. The ore is directly smelted in three water jacket furnaces, three feet in diameter, together with iron oxide ore and limestone as fluxes. Both coke and charcoal are used as fuel. The blast is furnished by one No. 8 Root's blower. The power plant is made up of one 80 H.P. horizontal tubular boiler, and one 20 H.P. portable horizontal tubular boiler, one 80 H. P. engine, one 20 H.P. winding engine, one 125 H.P. vertical turbine for the blower, one 12 k.w. dynamo, and one 6 H.P. motor. The labourers employed are 2(7 persons: --Miners 49, dressing hands 46, smelters 23, transporters 22; workmen 30 and coolies 97. Products in 190 i. Ore 7,432 long tons. Gold (5,559 troy oz. Silver 0,629 troy oz. Copper i'9 long tons. Two 575 H.P. water turbines are now being projected to be installed with the utilization of the stream of the Poropets. For the treatment of the poorer ore, a new cyaniding mill will be commenced before long. THK KOSAKA COPPER MINK. The Kosaka is the largest mine not only in Japan, but also in the Far East, and is now in its golden age; it however has passed its adult period. It is situated at the end of the line of the...