INVESTIGATION OF PYROMETALLURGICAL NICKEL PIG IRON (NPI) PRODUCTION PROCESS FROM LATERITIC NICKEL ORES


Yücel O. , Turan A., Yildirim H.

3rd International Symposium on High-Temperature Metallurgical Processing held during the held during the TMS 141st Annual Meeting & Exhibition, Florida, Amerika Birleşik Devletleri, 11 - 15 Mart 2012, ss.17-23 identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Basıldığı Şehir: Florida
  • Basıldığı Ülke: Amerika Birleşik Devletleri
  • Sayfa Sayıları: ss.17-23

Özet

Nickel is mainly used in stainless steel production as ferronickel. In recent years, low grade ferronickel or nickel pig iron (NPI) is used in stainless steel production to reduce expenditure of nickel price. In this study, Turkey East Anatolian region lateritic nickel ores were directly introduced carbothermal reduction to produce NPI. Firstly the raw lateritic ore that contains 0.9% Ni, 0.054% Co and 2.3% Cr was mixed with metallurgical grade coal at different stiochometric ratios. The samples were smelted at 1600-1650 degrees C temperature range in an induction furnace for 25 min. In the second experimental set, different processes times were carried out from 15 to 35 min. The raw material, obtained alloys and slags were analyzed by using XRD (X-Ray Diffractometer), XRF (X-Ray Fluorescence Spectrometer), AAS (Atomic Absorption Spectrometer) and EPMA (Electron Probe Micro Analyzer) techniques.