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Chemical Constitution of ClaysRefractory Clays
32 other sections not shown
acid action alkalies alumina amount ball clays bauxite binding blocks bond burned calcined carbon carborundum cement cent changes in temperature chemical chiefly china clay chromite coal coarse coke colloidal colour composition compounds containing cooling corrosion cracks cristobalite crucibles crushing dolomite durable effect electric furnace felspar firebricks fireclay bricks firing flues fluxes fused silica fusible ganister gases glass pots glaze grains graphite grinding grog grog bricks heated high temperatures important impurities increase iron oxide kaolin kiln latter less lime magnesia bricks manufacture mass melting melting-point metal method mill mixed mixture mould obtained occurs ovens particles paste patented plastic clay porcelain porosity porous powder pressure produced proportion quartz quartzite readily reduced refractory material resistance retorts rock saggers sand satisfactory Seger Cone shape shrinkage silica bricks sillimanite slag soda specific gravity strength sudden changes sufficiently suitable surface texture thick tridymite usually vitrified whilst zirconia