Numerical Investigation of fume extraction systems of electric arc furnaces

In the current study fume extraction systems are studied numerically and the effect of various parameters as fresh air inlet gap size, fume temperature and composition as well as the dust size is investigated. To aim this goal a precise 3D model of the entire system and proper grid is generated and system of governing equations for the reactive turbulent two-phase flow is solved using a Finite-Volume based code. The results confirm that although increasing the gap size may lead to a reduction in CO volume fraction, but an increase in products temperature is inevitable. Besides, it is shown that, despite the high efficiency of settling chamber in removing the large size particles (greater than 45 micron), it has a poor efficiency in eliminating the smaller size dust particles.