MHD-equipment and technologies of semi-continuous billet casting of high-strength Al-alloys

Abstract

In this study, there are presented design and conceptual approaches developments for 2 (two) kinds of the original complex technological foundry equipment for the melting, holding and managed electromagnetic magneto-hydrodynamic high-strength aluminum alloys pouring at continuous billet casting processes.First kind performed as MHD-complex device created on base of the magneto-dynamic installation (MDI MDN-6A-0.63-WMD-M), that has applied as mixer-batcher with 630 kg capacity by Al-alloys with electromagnetic pump (up to 0.35 bar pressure). An experimental approbation for workability of the developed technologies for MHD-semi continuous billet casting, by means open stream melt feeding into 7 inch crystallizer and by progressive hot-top closed process, at the producing 1.0 meter of 7’ billet from Al-Zn-Mg-Cu wrought alloy has been executed. As second kind, there are developed conceptual design of 500 kg capacity by Al-Alloy pilot plant of the foundry equipment for the melting, holding and managed electromagnetic continuous billet casting, comprised upgraded tilting reverberator melting furnace combined with multifunctional horizontal magneto-hydrodynamic units (MHDU), as a W-shaped induction channel with 2 inductors (2 × 20kW) and external C-type electromagnet (0.01∼0.3T). MHDU provide homogenization melt temperature (650∼850°C) and it chemical compositions (at circulation melt intermixing 0.5∼3.0kg/s) and at the switching electromagnet of electromagnetic melt pouring with managed flow rate 0.05kg/s ∼ 15kg/s to tundish of the 3∼10 inches billet continuous casting machine (CCM).