The quicksilver resources of California . t PHOTO No. 31. FrR.\.\ r-AX LUIS OBISPO COUNTY inches thick. [See Fig. 84.] The later furnaces are commonlyof a daily capacity of 10, 20, 30, and 50 tons. The principalmaterials entering in these furnaces are: lo-Toii. i)o-Toii. so-Tou. Common brick No. 150,000 300,000 400,000 Firebrick 12,000 30,000 Tiles iSS 360 42S Cement bbls. 25 40 50 Fire clay. Timber for frame. Iron for frame, grates, hopper^ etc. METALLURGY. 225 The price of the firebrick is $ per 1000 at San price of tiles 3 inches by 15 inches bv 36 inche
The quicksilver resources of California . t PHOTO No. 31. FrR.\.\ r-AX LUIS OBISPO COUNTY inches thick. [See Fig. 84.] The later furnaces are commonlyof a daily capacity of 10, 20, 30, and 50 tons. The principalmaterials entering in these furnaces are: lo-Toii. i)o-Toii. so-Tou. Common brick No. 150,000 300,000 400,000 Firebrick 12,000 30,000 Tiles iSS 360 42S Cement bbls. 25 40 50 Fire clay. Timber for frame. Iron for frame, grates, hopper^ etc. METALLURGY. 225 The price of the firebrick is $ per 1000 at San price of tiles 3 inches by 15 inches bv 36 inches is When the ore is charged moist in the furnace a great amountof water vapor will be formed, which not only increases thealready excessive amount of fumes out of which the mercurymust be condensed, but also the formation of a great amountof sulphuric acid and of sulphates, both of which are veryinjurious to the condensers. The opinion of operators as to. }-lG 77. Ore Drier, Utilizing exhaust Ml uiii the desirable degree of dryness of the ore before charging dif-fers. Some claim that for good practice absolutely dry orewould be preferable, while others consider a relatively super-ficial drying sufficient. In dry climates sun dr>ing ma}- incases then suffice. In many furnace plants the ore is dried byspreading over iron plates on the top of the first condensers. In other plants, for instance at the Oathill. Great Eastern, etc.,a special drier is used. [See Fig. 77.] The exhaust steam
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectminesandmineralresou
