Show tirl TIri UTILIZING LiziNa SLAG at the ironworks of the george georges hutte near 0 Osna ina bruck 11 hanover anover prussia mr nir C it bio fio eiker elker last year saw bome borne Imp improved royed processes connected wilh the utilization of the slag from smelting smelling sm elting furnaces heretofore this product has been used for making roadbeds road beds and has been run into moulds for building stone butara but mr hartman formerly manager of the works ln invented anted other processes processes of usefully disposing of this material the slag hag sag overflows from the high furnaces into a narrow gutter formed in the sand and runs into a shallow pit through which a small stream of water is constantly flowing which chilli the slag flag an endless chain gifts the chilled slag lag t slag out of the pit into cars it ia la it 14 then ither ground fine in arcement mill forming a sharp building sand or it is is mixed in a trough with hair half it bulk of mortar by there revolving shafts armed with long blades and then shoveled chov oled into a machine mathine and made into bricks at the rate of twenty five a nii nil minute nute the are piled in the open air fer for dayi drying ng which occupies about six weeks they continue to harden by exposure to the air and arid are said to leies leses 1 ess eiss greater strength than ordinary burnt bricks they are of a light gret grey color and their roughness of surface enables them to hold mortar admirably though their absorption of moisture unfits them for use in foundations by another process a thin stream of fluid slag falling from another gutter passes the flattened and semicircular semi circular nozzle of a one and a half inch steam pipe through which a jet of steam is blown with a pressure of fifty pounds per square inch the slag is thus solidified in the shape of delicate resembling gembl sem bling ing spun glassband glassand glas sand falls to the ground like a louse loose mass of grayish wool this fibrous stuff is an excellent cell celi erit exit nonconductor non conductor of heat he at is 18 used for covering steam pipes boilers etc and is sold for five dollars dollars per hundred weight hl |