SMELTING CHARGES AT INDIVIDUAL SMELTEES. 



653 



The average charge, deduced from data given iu Table IV, is as follows: 



Ore, 310 pounds. 



Flux, 157.C pounds. 



Fnel, 105.9 pounds. 



Oies 310 Dolomite . 



I Hematite . 

 I Old slags . 



69.53 Charcoal 59.10 



29.57 Coke 46.80 



58.50 I 



Chiirge (ore and flux). 407. pounds. Smelting charge (ore, flux, and fnel), 573.5 pounds. 



lu the average charge the jiroportious are — 



Flux to ore 



Fuel to ore 



Fuel to chai'ore 



50f 

 92? 



Being iu possession of data obtained at Smelter C for the month of July, 1880, 

 these data will be discussed, for in the opinion of the writer everything connected 

 with Smelter G is worth recording. 



Tons. 



Ore .smelted iu July, lf-80 1,500 



Dolomite siuelted iu July, 18c0 525 



Hematite smelted iu July, 1880 85 



Bulliciu produced iu July, 1.-80 435^ 



The bullion produced in twenty four hours is equal to 14 tons, assaying 136 ounces 

 of silver to the ton. 



The average charge I'or the mouth of July, 1880, is as follows: 



Ore, 310 pounds. 



Churge (ore and flux). 454 pounds. Smelting charge (ore, flux, and fuel), 559 pounds. 



In the preceding charge the average pi oportions are — 



Flux to ore 40^ 



Fuel to ore 34 



Fuel to charge 23 



Production of bullion per charge, 90 j)ouuds. 



As has previously been stated, the mixture of ore, dolomite, and hematite, weigh- 

 ing about eiglit hundred pounds, is called the charge. It is made to contain about 

 20 per cent, of lead, of which about 88 per cent, is extracted iu the state of bulliou. 

 Consequently each charge will coutain 160 to 101 pounds of lead, of which 141 to 141.5 

 pounds are extracted iu the state of bullion. This quantity of bullion requires 200 

 pounds of fuel for its extraction, showing that one part of bullion requires about one 

 and oue-half parts of fuel for its reduction. 



As the quantity of material to be smelted iu each charge weights about 920 pounds, 

 from which 141 pounds are extracted iu the state of bulliou, the remaining 779 pounds 



