Luxembourg, 8 April 2009. At Dragon Steel Corporation’s (DSC) Taichung works in Taiwan, DSC and its supplier Paul Wurth are currently performing the hot commissioning of the new PRIMUS® plant which will recycle fine material (dusts, sludge, etc.) from the existing Electric Arc Furnace shops and from future sintering, blast furnace ironmaking and BOF steelmaking. In this frame, first hot metal has been successfully tapped from the plant’s melting furnace on April 4th, 2009.
The PRIMUS® technology, developed and delivered by PAUL WURTH, is based on a multiple hearth furnace (MHF)– used for pre-heating, calcining and pre-reducing the residues using economical coal, combined with a specially designed electric arc furnace for smelting the charge from the MHF and fuming off the zinc. It represents an innovative solution for recovering separately iron and zinc as added value materials from iron and steelmaking residues: zinc is recovered as zinc oxide, iron as pig iron and gangue materials as inert slag. The PRIMUS® process features recovery rates of zinc and iron close to 100% – while complying with the most stringent environmental regulations.
At DRAGON STEEL, the PRIMUS® plant will provide a nominal recycling capacity of 100,000 tons (dry base) of fine material per year and will be operated with different feed mixes, ranging from 100% EAF dust to a high proportion of blast furnace residues.
PAUL WURTH is honoured to extend its leading PRIMUS® technology for environmental improvement and cost benefit for the steel industry.
PAUL WURTH S.A. • 32, rue d’Alsace • P.O. Box. 2233 • L-1022 Luxembourg
Tel. : (+352) 4970-1 • Fax : (+352) 4970-2209
• www.paulwurth.com