PATENT 3449. STAALYNDICAAT LEDEBOER. Reducing Iron Ores. British Patent 287,925, Mar. 30, 1927. Chem. Abs., vol. 23, 1929, p. 366. In reducing Fe ore and melting the Fe formed by the combustion of a gaseous fuel, a combustion gas is used which contains virtually no O2 and is produced by the complete or virtually complete combustion of the fuel by a surface combustion burner. See abs. 45, 130, 131, 136, 572, 575, 973, 977, 1101, 1886, 2053, 2335, 2439, 2627, 2749, 3224, 3260, 3717, 3848. |