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Journal of Materials Science and Nanotechnology | Volume 3

October 07-08, 2019 | Frankfurt, Germany

Materials Science and Engineering

International Conference on

Mater Sci Nanotechnol, Volume 3

An analytic modeling the air-mist cooling for continuous cast slabs

Victoria Miroshnichenko

Priazovsky State Technical University, Ukraine

espite the extensive use of the air-mist secondary cooling

(SC) the continuous cast slabs (CCS) some drawbacks of

the existing control models are still unrepaired:- big amount

of online numeric calculations to specify the real-time values

of the SC characteristics: slab temperature profile, water

flow rate, heat transfer coefficient etc.; - fully empirical

nature of the currently applied necessary relations between

the corresponding technological parameters; - possibility of

nonlinear phenomena or processes development during

the SC that leads to violations of the “additivity” rule and

decreases accuracy of the control. Aim of the research is to

show possibility to improve the steel slab caster productivity,

SC control effectiveness and finished slab quality by

application of early developed model for the air-mist cooling,

based on meeting the “mixture” rule requirements. A new

“one-equation” approach is developed to determine the air-

mist cooling characteristics analytically. It utilizes the main

equation that provides defining the air-mist supply conditions

to avoid the nonlinear phenomena appearance during the

cooling. The equation is also adjusted to take into account the

heat transfer and related processes development. Cooling

time or secondary cooling zone length analytical distributions

are obtained for basic SC characteristics. Function relations

betweentherelevanttechnologyparametersarealsoderived.

High stability of the main secondary cooling characteristics

under the typical casting speed fluctuations is shown. The

approachprovides improvingthecoolingcontroleffectiveness

duetodecreasingtheon-linecalculationamountincomparing

with currently applied numerical on-line solving the systems

of differential equations. Improvements of the caster

productivity and finished slab quality are grounded to obtain