Abstracts Book - IMRC 2018

• SE2-O043
A NOVEL EXPERIMENTAL TECHNIQUE TO OBTAIN MIXING TIME IN
GAS-STIRRED LADLES
Marco Aureio Ramírez Argáez 1 , Luis Enrique Jardón Pérez 1
1 Universidad Nacional Autónoma de México, Facultad de Química, Mexico.
Ladle metallurgy is a key process step in steelmaking to obtain clean steel since
operations such as deoxidation, desulphurization, temperature uniformity,
alloying, and removal of inclusions take place in this furnace. For decades,
mixing time has been for researchers around the world as a measure of the
degree of agitation of this batch reactor and then, the mixing time has used to
evaluate the performance of this reactor. All of the studies on mixing time have
been done by measuring pH or electrical conductivity in water physical models
by introducing probes into the bath to measure pH or conductivity and when
the concentration of a tracer added to the bath reaches the equilibrium
concentration, that moment is the mixing time. However, the introduction of the
probes is intrusive in nature and modifies the flow patterns and tracer
convection so these techniques must introduce an intrinsic experimental error.
In this work a novel non-intrusive technique is introduced to measure more
precise mixing times, which is called Laser-Induced Fluorescence (LIF). LIF is an
optical technique that uses the fluorescent properties of Rhodamine B to track
the mixing behavior of this tracer in a plane lighted by a laser sheet giving a
quantitative, precise and accurate measurements of concentration fields and
since is not intrusive it can be said that the measurements on mixing time are
more representative than the traditional techniques.
Acknowledgment:
Authors would lie to thank PAIP- Facultad de Química-UNAM for financial
support.
Keywords: gas-tirred ladle, mixing time, LIF
Presenting authors email: dregwar@gmail.com