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Show 6 INTER-MOUNTAI- ty sight. When one side is well under way the furnaceman starts the other side. After this first start there is no further necessity for fuel in the furnace, the sulphur burns itself from this out, and the only necessity is work, and some small skill on the part of the operator in keeping the fire going over the entire hearth. When the material has been on the grate for about twenty or thirty minutes the fire decreases somewhat, and then the workman takes an iron bar, thrusts it under the cake of sintered material, which has formed from the iron sulphide melting and running together, raises this cake up, breaks it into reasonable pieces, turns these over, and allows them to lie on the grates for a few minutes longer. The fine material which has not before ignited, but has been heated through contact with the flame, ignites at once and with vigor, upon this stirring, and the furnace presents at this moment a very pretty spectacle, as it is a mass of seething flame of many colors. As soon as this has subsided a little, the lumps are raked out at the front of the furnace and allowed to drop through the opening between the furnace and the feed floor provided for this purpose. They fall into the brick or iron-line- d bin and cool, losing quite a little sulphur in the operation. The lumps removed, the workman smoothes the charge on the grate and adds fresh ore, to cover the grates to about the same depth as before. While this discharging operation is going on on one side of the hearth, the other is burning, and in this way the workman is kept busy all the time. Some little fine material drops through the holes in the grates, but this amount is small and even this is generally fairly well roasted. The mass of sparks which fly up, on the charge being stirred, settle in the dust chamber behind the furnace and will be found to be quite thoroughly desulphurized. The product of the furnace is about 80 per cent in the shape of lumps, which have the appearance of cinders quite porous and somewhat brittle. If the ore is somewhat silicious some of the product will be slagged, as the silica drives out the sulphur, unites with the iron and forms a slag. The operation is practically One man readily works continuous. tons from one ton to one and one-ha- lf per hour of crude ore or concentrates, the amount depending much on the amount of sulphur in the ore. At our plant at Bingham we have tons per day handled up to thirty-fiv- e of an ore carrying 31 per cent iron, 37 per cent sulphur and 26 per cent silica, the ore having merely been passed through a crusher. The resulting product ran only 8.5 per cent sulphur and showed no losses of metals. We have N MINING REVIEW, Lead concentrates can be handled by this method, but it is not advisable as the intense heat drives off some of the lead and causes losses which are not equalized by the gains of the process. Attached to a concentrating mill this furnace will reduce the bulk of the pyritous concentrates 30 per cent without loss of metal, and at a cost for labor and blast of not over 50 cents per ton of crude material. Where the ore is treated crude, the cost of crushing must be added to this, making the cost about 75c per ton. The saving to the shipper figures about as follows: Say, freight to the smelter is $5 per ton, and smelting charges are $5, a total of $10. Of these total charges, whatever they figure up, the process saves from 25 per cent to 30 per cent, according to the sulphur contents of the crude ore. That is to say, at a cost of from 50c to 75c, we can save from $2.50 to $3.33 per ton on the above shipping rates. The cost of the furnace is small; it is constructed of cast and wrought iron throughout, and is easily erected. Besides these advantages to the miner and shipper of pyritous ores, this furnace wrould be of great service to the copper smelter, for the treatment of copper sulphides, either concentrates or crude ores, for with this furnace he can at once and at a nominal cost reduce the sulphur contents to the point where the ore will matte to the best advantage, and the product is in a condition, as coarse porous lumps, which will smelt with the greatest rapidity. To the pyritic smelter this furnace offers a means of doing away with the worst feature of his process, that is the flaming top, for he can with this furnace reduce the sulphur contents of his ores, freeing them from the free sulphur, which causes the fire, and thus enabling him to use dry ores of a higher grade, and also to better control the operation of the entire furnace. The cost of the preliminary roasting will be about compensated by the reduced cost of smelting the smaller bulk of the roasted ore. Furthermore, this roasting hearth will enable the pyritic smelter to use fine concentrates, which after roasting are admirably adapted for the pyritic furnace, while in their crude state they make serious trouble. The sale of the Cannon grom of claims, in the Camp Floyd district, to an Eastern syndicate represented by A. Hanauer and Col. Treweek, for the sum, according to unverified reports, of $300,000, illustrates the possible profits of intelligent mining operations. This company was incorporated two years ago, with a capital of $50,000, divided into $5 shares. It was the owner of twenty-nin- e claims, which, although most located in the promising portion of the district, were no at that time worth onetenth the present values. Last year five claims, the Hecla group, were sold for $11,000 ach, which returned the entire capital stock and $5000 over, and a short time ago $40 per share was offered for the stock, which was a valuation of $400,000. for the remaining claims. The sale just consummated covers only what is known as the Cannon group, eighty-thre- e acres of ground adjoining the Mercur. The Cannon company has handled pyrite concentrates carrying 9 per cent moisture, 6 per cent silica, 42 per cent iron and 48 per cent sulphur at the rate of one ton per hour, and could increase this considerably if we had had sufficient flue chamber capacity to catch the dust, which increased blast pressure would produce. The product from these pyrite concentrates carried 15 to 19 per cent sulphur, 55 per cent iron and as closely as we can figure all the metals (gold and silver) in the raw ore. three groups left. NEWS CLEAN-U- P. Mercur is to have an electric light plant. The Ajax company will purchase a new air compressor. A discovery of free gold is reported in the Peepstone district. Henry Heldt was killed by a cave-i- n in the Horn Silver mine last Monday. A branch of the National Association of Stationary Engineers has been organized at Mercur. At Alma, Colo., diamond drills are being sunk 1000 feet to penetrate the Little Johnnie belt extension. Peter Murphy, a miner, was fatally by falling down a winze in the injured Bullion-Bec- k mine last Friday. The DeLamar Mining company, at DeLamar, Idaho, is using coal for fuel instead of wood, as an experiment. Mr. Jesse R. Grant, son of Gen. U. S. Grant, is a mining engineer, and makes his home at San Diego, Cal. mill was closed The Bullion-Bec- k down for three days last week by a break-dow- n of the driving engine. d State Line disThe trict is coming along at a lively pace. Two claims are already in litigation. The Colorado Mining Stock Exchange has decided to open a branch exchange at New York City, on Herald square. The dead body of Henry Boos, an aged miner, was found in the ruins of his cabin near Hailey, he having been killed by a snowslide. The Yukon Transportation company is building at Seattle three steam and two gasoline launches for service on the upper Yukon river. A fine ledge of white, quartz has been discovered in the Pueblo mountains, near the line between Nevada and Oregon. It was stated by the Mining Review last week that recent shipments by the Creole at Park City had netted $300 per ton. It should have read $300 per car. The Jim Corbett claim at South Pass, Wyo., gave an assay of $70.23 in gold feet and $865 at a depth of twenty-on- e feet. Other new disat twenty-seve- n coveries are reported in this vicinity. The Sioux Consolidated, at Mammoth, will drive a 3000-foworking tunnel in order to reduce the cost of handling the ore. It is estimated that 20 cents per ton will be saved. The mines on Gold Hill, in the Cripple Creek district, pay 40 cents per barrel for water for their boilers, and this expense is greater than the cost of the coal. An additional $45,000 of the Pleasant Valley Coal companys first mortgage bonds have been listed on the New York Stock Exchange, making the total amount listed $600,000. The Iuka Tunnel company, at Cripple Creek, has placed two million shares of its stock in England and has let a contract to drive a tunnel 1000 feet into Tenderfoot Hill. Half a dozen women in bifurcated garment and armed with rifles have left Tacoma for the Yukon country, Alaska. They expect to make high wages cooking for the miners. In about a month the Eureka Hill mine will ship a carload of accumulated base bullion product which carries 75 per cent copper. It has been held back on account of the low price of copper. H. S. Joseph and Hyrum Beck have taken a lease on the New Tintic mine in North Tintic, and will put it in shape for production at once. They are also working the Mountain Lion, an adjoining property. Gardner Williams, manager of the De Beers Consolidated mines, in the Transvaal, is the latest American victim of Boerish wrath, being charged with shipping arms from British territory into Kruegers Republic. Ore almost identical in appearance with the Leadville carbonates has been discovered in Cottonwood gulch, near Salida, Colo. Cinnabar is also found newly-organize- gold-beari- ot ng |