Sponge, burnt

Ores, Burnt time Metallurgicot dusts. Sponge iron (hot) Caustic MgO... 

Synonyms Burnt sienna Cl 77491 Copperas red Ferrous ferrite Gulf red Indian red Iron mass, spent Iron oxide Iron oxide, spent Iron sponge, spent Pigment red 101 Pigment red 102 Red haematite Red iron oxide Red oxide Turkey red Definition Sienna, siderite, Persian red, Spanish red, and red ochre are natural iron oxide ores used as red pigments Empirical FejOj... 

HISTORICAL BACKGROUND. It is noteworthy that certain ancient peoples recognized and treated mineral deficiencies, although they did not understand the bases of their treatments. For example, a Chinese document dated about 3000 B.C. described goiter and recommended that the afflicted people eat seaweed and burnt sponge, which are good sources of the trace element iodine. Another deficiency... 

Mannheim TenterlofF Process First bed loaded with burnt pyrites containing copper. Second bed, with up to 200 tubes—about 12 cm diameter, full of asbestos sponge soaked with platinic chloride solution reduced with formaldehyde. 

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