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Metal Casting Technologies : March 2006
COVER PROFILE he front cover shows a Dross 500, 12 tonne capacity Tilting Rotary Furnace (TRF) in operation. The TRF is one of three installed at the SNR Prémery plant as part of the overall aluminium recycling plant installed by Dross Engineering SA, of France. The TRF units designed by Dross Engineering have found applications across the range of non-ferrous industries and are used to melt zinc and aluminium and reduce lead, tin and bismuth oxides thus showing the remarkable versatility of this furnace concept. The Tilting Rotary Furnaces designed by Dross Engineering are manufactured in Australia by Furnace Engineering Pty. Ltd, under a manufacturing licence agreement, to supply the Australasian region. The Dross Engineering TRF is an innovative design, with many features including: ■ Salt free operation ■ Vari-gas burner control system ■ Maximum use of rotating unions, eliminating the use of flexible hoses. ■ Onboard control panel, power pack & air blower ■ Self supporting chassis ■ No need for expensive foundations ■ Positive and direct drive ■ New generation temperature control ■ Option of Air/Gas or Oxygen/Gas firing. The Vari-gas system, developed by Dross Engineering, is a particular feature of the pictured TRF. Vari-gas combustion control allows the operator to: ■ Choose the burner power setting (max, mid-range or low) and to define intermediary power settings ■ Set the furnace 'atmosphere': slightly reducing (excess gas), neutral (stoichiometric), or slightly oxidizing (excess air) ■ Define and save to memory an 'atmosphere curve' in relation with the type of products to be melted. For example: the melt programme for charge of contaminated feed stock could start off 'oxidizing' change to 'slightly reducing' and finish 'neutral'. All these operations are programmed using a few keys on the operator interface. The Vari-gas system is primarily a furnace control tool that, in the hands of an experienced furnace operator, enables exceptional thermal and metal yields to be achieved. For more information about the Dross Tilting Rotary Furnace or to discuss any of your heat processing needs please contact Furnace Engineering on: +61 3 9544 2922 or visit: www.furnace.com.au ● The innovative Dross Engineering Dross 500, 12 tonne capacity Tilting Rotary Furnace T www.metals.rala.com.au 52