SMELTING CHAKGES. 



649 



Table V. — Composition of ore-hedff. 



Number of ore-bed. 



Humid I Moist- Dry Per 



weight, ure. ' ■weight. cent. 



Total 



weight. 



Total I to the I Total 

 weight. ™J°« I weight. 



Total 

 weight. 



Lhe. 

 410,355 

 340,915 

 302,690 

 283,000 

 279,475 

 330,805 



P.ct. 

 10.2 



10.7 

 9.4 



Lbs. 

 368, 430 

 304, 099 

 270, 257 

 256, 358 

 245, 902 

 296, 920 

 235, 340 



21.54 

 26.50 

 22.30 

 22.00 

 20.00 

 25.40 

 17.35 



Lbs. 



79, 375 



80, 840 

 60, 354 

 56, 475 

 49, 321 

 7,5, 556 

 40, 831 



21.48 

 23.20 

 22.10 

 26.40 

 16.60 

 21.86 

 24.78 



Lbs. 

 79, 160 

 70, 779 

 59, 975 

 67, 876 

 40, 841 

 64, 696 

 58, 321 



61.62 

 66.02 

 65.03 



Ounces. 

 7,912 

 5,946 



4,734 

 7,898 

 8,146 

 9,690 

 6, 651. 9 



19.50 

 19.60 

 20.00 

 21.00 

 28.20 

 19.00 

 23.45 



Lbs. 

 71, 868 

 69, 875 

 54, 105 



54, 135 

 69, 437 

 56, 267 



55, 239 



Totals and averages. 



. 1, 97' 



I 



22. 40 i442. 752 | 22. 30 '441, 648 



51.56 I 50,977.9 



21.30 



420, 926 



No. 1 is made at Smelter H of ore from the Amie. Hibernia, Ilomestake. and iloming Star mines. 

 No. 2 is made at Snielttr H of ore from the Amie, Chrysolite, Evening Star, Morning Star, and Virginins mines. 

 No. 3 is made at Smelter II of ore from the Amie, Evening Star, Hibernia, Homestalse, Little Giant, Horning Star, etc. 

 No. 4 is made at Smelter H of ore from the Amie, and Ereniug Star. 

 No. 5 is made at Smelter Hot ore from the Amie, Adelaide , and of flue-dust. 

 No. 6 is made at Smelter H of ore from the Aiuie, Morning Star, etc. 



No. 7 is made at Smelter B of ore from the Catalpa, Evening Star, Henriett, Hibernia, Highland Chief, Morning 

 Star, and Silver Wave mines. 



A consideratiou of Table V shows — 



1. That the ore beds vary a good deal in weight ; in (he examples given, from 117 to 169 tons. 



2. That the mixtures contain on an average about the same quantity of silica, iron, and lead. 



3. That on au average the relation of silver to lead by weight isa.s 1 to 120.4,or one onnce of silver 

 to 8i pounds of lead. 



4. That the amount of moisture is pretty constant. 



SJXELTING CHARGES. 



By smelting charges will be designated the combined weights of ore, fluxes, and 

 fuel thrown at the same time into the furnaces, and by charges, the weights of ore and 

 fluxes entering into the composition of the smelting charges. The word ore embraces 

 ore beds and unmixed ores, and the word fluxes, dolomite, hematite, and old slags. 

 The weights of smelting charges difl^er a good deal, according to the capacity of the 

 furnaces. The term fuel will always be used for the mixtures of coke and charcoal 

 used in Leadville. Although the amount of fuel used in smelting will always be given 

 in weight, it must be remembered that coke antl charcoal are not weighed at all smeltens, 

 but are as often measured by the shovel or the barrow ; the volume has been converted 

 into weight for comparison. 



Smelti:r a. 



The information obtained at this smelter is not very satisfactory. The smelting 

 charges are made up of — 



Oharge (oie and flns), 2(0 pounds. Smelting iharge (tie, flux, and fuel), 235 ponnds 



