| Title |
The RecoDust Process-Upscale of a Pilot Plant |
| ID_Doc |
23067 |
| Authors |
Reiter, W; Rieger, J; Lasser, M; Raupenstrauch, H; Tappeiner, T |
| Title |
The RecoDust Process-Upscale of a Pilot Plant |
| Year |
2020 |
| Published |
Steel Research International, 91, 12 |
| Abstract |
The RecoDust process is a pyrometallurgical approach for the treatment of heavy metal-containing basic oxygen furnace dusts (BOFD) and delivers two products without any residues: the iron rich RecoDust slag and a zinc rich filter dust, called crude zinc oxide (CZO). The state of the art Waelz process has some disadvantages and is only suitable for dusts with zinc contents >15%. Within the frame of a project of the Austrian competence center program K1-MET and with financial support of voestalpine Stahl, a RecoDust pilot plant is operated at the Chair of Thermal Processing technology at the Montanuniversitaet Leoben and has shown good dezincification rates of BOFD in eleven smelting campaigns with a throughput up to 300 kg h(-1). The target is the design of an industrial plant with a throughput capacity of 1000 kg h(-1)in the next years. For the upscale, a new pneumatic conveying system was installed at the pilot plant, which uses natural gas as conveying medium. The commissioning of the developed pilot plant was successful and revealed a good product quality of the CZO. An enhanced dezincification of the RecoDust slag is one open challenge, therefore the dust feed conveying must be more precise. |
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