SMELTING CHAEGES AT INDIVIDUAL SMELTEBS. 



651 



SMELTER B. 



Smelting charges made in August, 1&80 Continued. 

 No, 3. 



Ore, 510 pounds. 



Flux, 100 pounds. 



Ore-bed ISO j llolomite . 



Low-grade ores ICO j Old slags . 



Various rich ores.. 250 

 Lead scraps 10 



40 

 150 



Fuel, 140 pounds. 



Charcoal 80 



Coke ... .. 60 



Charge, 700 pounds. Smelting charge, 840 pounds. 

 No. 4. 



Ore, 500 ponuds. 



Flux, 150 pounds. 



Fuel, 140 pounds. 



Ore-bed 300 i Doloniile 50 Charcoal 70 



Various rich ores.. 200 j Old slags 100 ' Coke '. 70 



Charge, 650 pounds. Smelling charge, 790 pounds 



At Smelter B fuel is measured by the wheelbarrow. Eighty pounds of charcoal 

 represent one charcoal barrow made of thiii sheet-iron and holding about 5 bushels. 

 Sixty pounds of coke represent an ore barrow used also for coke. In Fig. 2, Plate 

 XXXI (elevation of Smelter C), both kinds of barrows are indicated. 



In the smelting charges Nos. 1, 2, 3, and 4, the average proportions are: 



Flux to ore 36 



Fuel to ore , 27 i 



Fuel to charge SOi 



If we reconstruct aii average smelting charge from data given in Table IV we 

 find 



Ore, 500 pounds. Flux, 200.7 pounds. Fuel, 165.1 pounds. 



Variousores 500 Dolomite 69.85 Charcoal 100.8 



Hematite 1.85 Coke 64.3 



Old slags 135 



Charge (ore and flux), 700.7 pounds. Smelting charge (ore, flux, and fuel), 871.8 pounds. 



The figures represented here are normal; the great amount of old slags used at 

 this smelter accounts for the relatively small proportion of hematite. The percentage 

 of fuel is in excess of that given in the preceding examples, for the reason that part 

 of the fuel at the smelters is used for assaying, heating, and various other purposes 

 besides smelting. 



The proportions in the average charge are as follows : 



Flux to ore 41i 



Fuel to ore 33 



Fuel to charge 2:)i 



