How many dead residues are allowed in MNC

Summary

If we disregard the purely mechanical part, which is only concerned with the transformation of the types of iron represented by the metallurgical processes, the ironworks falls into two main branches, the production of pig iron (blast furnace smelting) and the transformation of it into malleable iron Fresh process).

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Notes

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This chapter is part of the Springer Book Archives digitization project with publications that have appeared since the publisher's beginnings in 1842. With this archive, the publisher provides sources for both historical and disciplinary research, which must be viewed in a historical context. This chapter is from a book that was published before 1945 and is therefore not advertised by the publisher in its political-ideological orientation typical of the time.

literature

  1. 50 g of ammonium molybdate are dissolved in 200 ccm of ammonia (specific weight 0.96), the clear solution is introduced into 750 ccm of nitric acid (specific weight 1.2) in a thin stream while swirling, left at 35 ° for 24 hours and filtered .Google Scholar
  2. Years ago, the author produced a magnetic iron stone concentrate from Gellivare ore, which has an iron content of 71.80% and, due to the complete absence of poorly soluble iron luster, dissolves extremely easily in hydrochloric acid; Nor is it hygroscopic, just like most magnetic iron stones, it contains a little vanadium, which has a disruptive green color.Google Scholar
  3. Brandt [Chem. Ztg. 40, 605, 631 (1916)]; see also children [Stahl and Eisen 37, 238 (1917)]. Accordingly, Brandt advocates the production of pure iron oxide via oxalate; this avoids its contamination by phosphorus and platinum.Google Scholar
  4. In the latest embodiment of the device, the bore of the central tap does not protrude exactly concentrically into the circular opening, but deviates by a few degrees from the center line, whereby the liquid only begins to flow when the round opening in the tap exactly with the mouth the lower funnel collapses.Google Scholar
  5. Available from Jean Wirtz, Düsseldorf, Google Scholar
  6. Obtainable from F. K. Retsch, Laboratoriumsbedarf, Düsseldorf. Google Scholar
  7. Obtainable with carbon contents of 0.10, 0.17, 0.27, 0.44, 0.67, 0.75 and 1.03% from the State Materials Testing Office, Berlin-Dahlem.Google Scholar
  8. For very precise determinations, it is recommended that the filtration only be carried out after standing for 24 hours.Google Scholar

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© Springer-Verlag Berlin Heidelberg 1932

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