The Reduction of Iron Ores: Scientific Basis and Technology by Prof. Dr.-Ing. Ludwig von Bogdandy, Prof. Dr. rer. nat.

By Prof. Dr.-Ing. Ludwig von Bogdandy, Prof. Dr. rer. nat. Hans-Jürgen Engell (auth.)

For the English variation the publication was once revised via the authors, making an allowance for a few feedback of the readers of the German version. essentially the most very important guides within the box of iron ore aid, which seemed for the reason that 1967, were used to carry the manuscript so far as attainable modern. the sort information of Dr. okay. BOHNENKAMP of the Max-Planck-Institut fUr Eisenforschung, Dusseldorf, used to be a lot liked during this recognize. Ohapters 2.9 and 2.10, facing the relief of molten oxide slags by means of strong carbon and with the contribution of the water-gas response to iron ore relief, were extra for the English version. Ohapter 2.9 has been thoroughly revised with the sort suggestions of Dr. H. J. GRABKE, Stuttgart. Dipl.-Ing. J. LODDE contributed to this variation by means of revising the bibliography. due to the swift improvement of the blast furnace it was once essential to revise Ohapter five significantly. during this box many important feedback were made through Dipl.-Ing. G. LANGE and Dipl.-Ing. P. HEINRICH. moreover, Ohapters3 and four were completely revised via Dr.-Ing. E. FORSTER and Dr.-Ing. U. SCHIERLOH. final, yet no longer least, we need to thank our translators for his or her very good work.

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7. lzJ·/O ·ilJ _ ~). lO-lOOIIT! I. 10 Mole {rac/ion!! 111 Fig. 8. 1. Equilibria boundary Fe/FeO is in both cases interpreted as due to an arrangement of the vacancies. In the model we have just developed this effect is in. cluded for y ~ fJ without the need for any additional hypothesis. ~ ..... U95 Q ...... IJ. - J 1 J V .... 000 c:: '"c:: • 1/· • . 02 Mol e froction y of vacanci es 0 Fig. 9. Effect of the mole fraction or iron ion vacancies y on the wlistite lattice constant a VALLET and RACCAH 20 c) determined the phase boundaries FeO/Fe and Fe304/FeO experimentally.

G. KING: J. Amer. Chern. Soc. 5849. High-temperature enthalpy, entropy increment, and heat of transition: K. R. BONNICKSON: J. Amer. Chern. Soc. 76 (1954) p. 1480. Enthalpy of iron(III)-oxide: J. P. COUGHLIN: J. Amer. Chern. Soc. 73 (1951) p. 3891. 0 I >1O~0 <3% According to VALLET: Pub!. de IRSID, Serie B, No. 26,1955 1127 1227 1327 1427 1525 1525 1400 1500 IHOO 1700 1798 1798 c c c c c l -88HO -8820 -8800 -8790 -8755 :-6945 -7GlO --7;'30 -7440 -7:310 -7120 -7120 According to ELLIOTT, GLEISER, and l{A~IAKRISIINA: Thermochemistry for Steelmaking, Vol.

G. SAHAMA: J. Amer. Chem. Soc. 70 (1948) p. 2156. Entropy of formation: K. K. S. Bur. Mines Bull. 477. High-temperature enthalpy and entropy increment: R. L. ORR: J. Amer. Chern. Soc. 75 (1953) p. 528. 5°C State at Toe c c c c c c LlH~ cat/mote -35250 (±220) -35010 -34950 -34830 -34660 -34440 LlG~ cat/mote -35820 -36490 -36630 -36760 -36895 -37050 According to ELLIOTT, GLEISER, and RAMAKRISHNA: Thermochemistry for Steel· making, Vol. }jLondon 1963. Enthalpy of formation: K. J. NEUVONEN: Bull. Conim.

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