Christiaan Zeilstra
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9 records found as author
CFD modelling of the off-gas system HIsarna iron making process part 2
Reflux chamber geometry modification and effects on flow behaviour
A three-dimensional computational fluid dynamics (CFD) model for the HIsarna off-gas system is set up and validated by real plant data. In the model detailed reaction mechanism and kinetic data for post-combustion of CO-H2 mixture and carbon particles are incorporated. The res ...
CFD modelling of the off-gas system of HIsarna iron making process. Part 1
Model development using detailed reaction mechanism for post-combustion of CO–H2 mixture and carbon particles
The HIsarna process is a new and breakthrough smelting reduction process for hot metal (liquid iron) production from iron ores and coal directly fed into the reactor. The flue gas from the main reactor enters the off-gas system containing small amounts of H2, CO and ...
In order to understand the pre-reduction behaviour of fine hematite particles in the HIsarna process, change of morphology, phase and crystallography during the reduction were investigated in the high temperature drop tube furnace. Polycrystalline magnetite shell formed within ...
In order to understand the thermal decomposition kinetics of hematite particles in inert atmosphere, thermogravimetriy was employed for isoconversional analysis. The kinetic triplet was estimated from the experimental data and the isothermal reaction kinetics was predicted. Th ...
HIsarna is a promising ironmaking technology to reduce CO 2 emission. Information of phase tr ...
Melting and reduction of fine iron ore particles in the gas environment of a HIsarna smelting cyclone is a critically important topic, but very limited information is currently available except for some experimental data from high temperature drop tube furnace (HTDF). This wor ...