Canadian grocer April-June 1918 . of these impart, as well, relativehardness to the glass. The soda ash isreally a reducing and combining agent. In order that the broken glass maybe taken to the heating furnaces with-out impurities a revolving screen is usedto separate foreign substances, waterwashes the glass and magnets are usedto separate any metallic substances thatmay have passed through. Passing through chutes to the mouth of a huge furnace built of firebrick anoperator uses a long iron-handled tool topush the dropping mixture into the al-ready molten mass of glass and
Canadian grocer April-June 1918 . of these impart, as well, relativehardness to the glass. The soda ash isreally a reducing and combining agent. In order that the broken glass maybe taken to the heating furnaces with-out impurities a revolving screen is usedto separate foreign substances, waterwashes the glass and magnets are usedto separate any metallic substances thatmay have passed through. Passing through chutes to the mouth of a huge furnace built of firebrick anoperator uses a long iron-handled tool topush the dropping mixture into the al-ready molten mass of glass and process goes on continuously sothit tnere is a constant lake of moltenglass in preparation to keep theoperators and the huge machinery busythroughout the day. The furnace itself is a huge rectangu-lar affair with walls of as much as 18-inch thickness. The intense heat whichmust be maintained makes the life ofthe furnace as short as twelve monthsand not longer than eighteen. In somecases this is even shorter and great ex- ? ?. Nos. 1 and 2 mark the huge OwensGlass Machines which take the semi-molten glass from the furnace andthrough a series of operations turnout the finished jr, rs. Ncs. 3 and 4 show one end of theIehrs or annealing ovens explainedin the article. The slats are longbars of heavy iron, being made of thistD withstand the heat of 1200 degrees. In the lower photo the liare shown after delivery from the dis-charging end of the :ehcome out here after passing throughvarious temperatures which serve totemper them so that they are noteasily broken. 20 pense is entailed in frequent in operation the heat required isabout 2,500 degrees and this must bewell maintained. While various shapesand types of furnaces are used, that em-ployed for making a great many of theregular products is of the rectangularstyle. Producer Gas as Fuel In the employment of producer gasmade from a special coal suited to intense heat is secured and this canbe best maintained a
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Keywords: ., bookcentury1900, bookdecade1910, bookidcangroceraprjune1918toro
