TO CONVERT IRON ORE.
"T*lr. W- C. Wallya Tesiderit of Mudgee, has applied for a patent for an automatic -hot blast' furnace which. he pro-1 poses to; employ in- converting iron ore i into pig iron, Tlie invention consists of an air-sollar,i wbitfh is ; constructed to a. suitable point ,of -elevation:. :• Atmospheric air is conveyed from the collar through heated which pass through the fire chamber, heated air Jbeing by 'atmospheric pressure and expansion, into conduct pipes, and froth these ,'pipea discharged through nozzles into the blast furnace. Mr. Wall estimates that a volume of heated air ..equal to 300,000 cubic' feet per hiinute will.be i fcrced: : through the fire chamber,intg-the 'blastfurnace. This.air will he heated up to from 1000 to 1200 deg. Pahr. The fire chamber,for heating the air is constructed somewhat on the same principle' as a reverbatdry furnace, the only difference being that there is no flue: dis« charging outwards. The heat.generated in the -fire chamber is conveyed through' | the sa\\a.T and discharged, into the blast furnace. The main features of: the invention are.its'siinplicity arid cheapness; : the estimated "cOst: of a furnace/ equal: Ito an output -of 100 tons of pig iron p.er day being under £1000. The erection .of the furnace will be proceeded with as,soon as.a suitable site is selected!,'
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