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Primary Metallurgy

  1. Vibratory Sieve Shaker AS 200 control
  2. Fluidized-Bed Reactor
  3. vertical tubular furnace

  1. Vibratory Sieve Shaker AS 200 control

    The analytical sieve shakers of the series AS 200 are used in research & development, quality control of raw materials, interim and finished products as well as in production monitoring. The controllable electromagnetic drive offers an optimal adaption for every product. Sharp fractions are obtained even after very short sieving times.


    • suitable for dry and wet sieving
    • excellent separation efficiency even with short sieving times
    • sieve stack up to 450 mm height
    • free ditgital adjustment of all process parameters (time, amplitude or sieve acceleration, interval)
    • memory for up to 9 SOPs
    • interval operation
    • optional software EasySieve for control through RS232 serial interface, easy evaluation and documentation of results
    • fulfils all criteria for measuring equipment related to ISO 9001
    • calibration certificate

      Vibratory Sieve Shaker AS 200 control
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  3. Fluidized-Bed Reactor

      The fluidized-bed-reactor allows the determination of reduction behavior (degradation of oxygen in ores) of iron ore fines in a fluidized bed process. Furthermore it enables the optimization of fluidized-bed based technologies for iron- and steelmaking.

      Technical Data:

      • Sample weight:

      up to 5 kg

      • Grid diameter:

      160 mm

      • Grain size of fine ore:

      0.06 mm to 4.0 mm

      • Temperature:

      up to 900 °C

      • Pressure:

      up to 0,5 bar overpressure

      • Gas-atmosphere:

      variable gas conditions

      (CO, H2, CO2, H2O, CH4, N2/Ar  etc.)

      • Gas-amounts:

      up to 700 lN/min

      The reactor has already been in process between 1996 and 2005 at voestalpine Stahl Linz for the development of the fluidized-bed based technologies FIOR® and FINMET®. For the advancement of these technologies to the so called FINEX®-technology (Siemens VAI), it is necessary to explore the processes. Furthermore, different fine ores should be analyzed regarding their behavior in fluidized beds.

      Since July 2009 the apparatus was fully rebuild and automated. In June 2010 it was installed at the Chair of Ferrous Metallurgy by voestalpine Stahl Linz – in collaboration with Siemens VAI and the Chair of Ferrous Metallurgy.

      Wirbelschicht-Reaktor 1 Wirbelschicht-Reaktor 2
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  5. vertical tubular furnace

    The apparatus „vertical tubular furnace“ is an electrical heated, static reduction apparatus and is used in terms of performing reducibility testing of iron oxide containing feedstock and to determine the characteristics of different coke types. The aggregate is basically consisting of an electrical heated, vertical oven with 3 separate heating zones and an inner reduction retort. The diameter of the reduction tube is defined with 75, 78 respectively 125 mm for the reduction under load testing procedure, the outer dimensions are approximately 1800 x 2000 x 1000 mm. The gas supply system is the same as used for the fluidized bed reactor, hence all different gas mixtures from CO, CO2, H2, CH4 and N2 can be realized. Additionally this apparatus allows performing gas profiles, which means any change of gas composition in a defined period of time is possible to achieve process near conditions in this lab-scale equipment.


    The aim of this laboratory scale reduction test is to find out the suitability of different iron oxide carriers for use in blast furnace, COREX- and MIDREX-process. To fulfill all the specifications that have already been standardized in several ISO-norms, following technical requirements are necessary:

    • Temperature range up to 1100 (± 10) °C for the determination of the reduction behavior and up to 1100 °C (± 3) for determination of coke reactivity (ISO 7992 and 18894).
    • For reduction testing under load there has to be a load of 147 (± 2) kPa applied (ISO 11256).
    • The gas flow of the reducing agents CO, CO2, H2 und H2O as well as the inert gas N2 reaches from 5 to 100 l/min.
    • The weight of the samples is 500 for the 75 mm retort and 2000 g for the 125 mm retort for each test.

    Research conclusion:

    With this apparatus and the combined phase analysis it should be possible to develop a new standardized benchmark test to give a better quantification of the reducibility of different iron ore feedstock (sinter, pellets and lump ore).

    Figure: schematic illustration and photo of „Vertical tubular furnace“ as set in the laboratory

    vertical tubular furnace 1
    vertical tubular furnace 2
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