A practical treatise on soluble or water glass, silicates of soda and potash, for silicifying stones, mortar, concrete, and hydraulic lime .. . ed. Underthe middle of this wall the box cl is now attached,which encloses the iron pipe e, passing through thelength of the kettle. Then the shovels, or agitators,f f, are now applied with a wheel g at the end foreffecting the revolutionary movement. The steam-cocks h as seen at the front wall e, for indicating thestage of the water in the interior kettle ; the cock iserves for pumping and discharging the solution, andthe cock Jc for letting off the w
A practical treatise on soluble or water glass, silicates of soda and potash, for silicifying stones, mortar, concrete, and hydraulic lime .. . ed. Underthe middle of this wall the box cl is now attached,which encloses the iron pipe e, passing through thelength of the kettle. Then the shovels, or agitators,f f, are now applied with a wheel g at the end foreffecting the revolutionary movement. The steam-cocks h as seen at the front wall e, for indicating thestage of the water in the interior kettle ; the cock iserves for pumping and discharging the solution, andthe cock Jc for letting off the water, which was con-densed in the steam chamber C. The outer kettle is surrounded with ashes, or anyother non-conducting substance. The boiler is supplied with ventils and manometers,and the kettle B is tested to stand a pressure of 80-100 pounds per square inch. The kettle is now tilled with the necessary quantityof silex, after the front wall has been screwed on bymeans of the cock j, and is filled up with the causticlye, which is composed of 100 lbs. carbonate of soda APPARATUS FOR DISSOLVING QUARTZ UNDER PRESSURE OF FIVE ~^^ MANUFACTURE OF SOLUBLE GLASS. 47 to 20 gallons water, and 1 lb. of silex for each quartof water ; when filled, and the steam having assumedthe tension of 60 lbs. to the square inch, as indicatedby the safety ventil, the cock in is opened, when thesteam passes to the other kettle, and condenses onthe cold wall of the inner kettle ; here the tempera-ture is raised,* and assumes soon a pressure of sixtypounds, which point is indicated by the escape ofsteam from the safety valve. Fire is now kept up forsix to eight hoars under a constant escape of vapor. During all this time the shovels or agitators arekept in motion by the workmen, and then the silexcontained in the kettle will have dissolved from 80-90 per cent., and is drawn off, and may be re-filledfor a new operation. The apparatus may undergo some modification asthe agitators get a diffe
Size: 1109px × 2254px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1870, bookidpracticaltre, bookyear1870
