Show the blast furnace the blast furnace building contains three furnaces as follows one inch with three 18 three inch on each side 38 18 inch bustle pipe and circular brick feet one inch with eighteen three inch on each side 15 inch bustle pipe and circular brick fore heath feet one inch with 16 five inch tu yeres 18 inch bustle pipe circular brick feet each furnace has a brick which discharges the gases to a brick dust chain chamber feet terminating in a steel stack feet this stack follows the slope of the hillside except for the lasi fai st fifty feet which are vertical the main air line is forty inches inc hes in diameter and supplies bast b ast to the furnaces at 32 ounces each furnace has a daily capacity of to tons of ore and flux tapping is done continuously to the fore hearths heart hs where the heavy matte settles to the bottom and is tapped intermittently while the lighter slag runs out of a launder at the top of the slag cars the dust from the fumes is withdrawn from the dust chamber through doors fouteen fourteen feet apart and hauled up an incline to a bin in the reverb artory building from which it is charged into the rever bato ry furnaces for an analysis of the blast furnace slag shows silica 45 per percent ce fit iron oxide 25 aluminum oxide 69 lime 17 |