ThermAL-Hydraulic Computational simulation of a sheet pickling line.

CORZO SANTIAGO; DAMIAN RAMAJO; RIFAI MARINA; AGUERRE HORACIO; NIGRO NORBERTO

Rosario

Conferencia; 22 conferencia del acero IAS; 2018

Instituto Argentino de Siderurgia

Picklingpools are widely used in the steel industry for removing depositionsand oxides in several types of materials. Commonly the pickling fluidin the pools is a solution of HCl, which is hold under controlledconditions (temperature and concentration) to ensure efficiency. Inthis sense, uniform temperature in pool, and a proper fluid mixingare mandatory to avoid high concentration of oxides in the solution.The studied problem was a sheet picking plant, in which a thinthickness sheet is continuously immersed in a large pool. The sheetenters at room temperature and is progressively heated until reachthe solution temperature. In order to study it, the computationalfluid dynamics was used, and the heat transfer between the fluid andthe sheet was solved by means of the conjugated heat transfer method,which solves explicitly the thermal coupling between the fluid andthe solid allowing to get the temperature of the sheet along thepool. The present work had the aim to assess the facility designconsisting of a large pool splittedin two, in which the sheet takes a catenary shape. The study wasfocused in to assess the liquid inlet and outlets throttle positions,considering the induced motion in the fluid caused by the sheetvelocity and the sheet heating. Results showed that the flow waslargely mixed, in part due to the high inlet jet penetration, andalso due to the motion induced by the sheet, whereas stagnation zoneswere not observed. Finally, it was verified that the sheet reachedthe fluid temperature before leaving the first middle of the pool. Avery homogeneous temperature distribution was also found in thefluid.p { margin-bottom: 0.25cm; direction: ltr; line-height: 115%; text-align: left; orphans: 2; widows: 2 }p.western { font-family: "Arial", serif; font-size: 12pt; so-language: en-US }p.cjk { font-size: 12pt; so-language: es-ES }p.ctl { font-family: "Arial"; font-size: 12pt }a:link { color: #0000ff }