Valorization From Waste: Combined Reduction of Chromite Ore Processing Tailing and Sub-Grade Manganese Ore to Produce 200 Series Stainless Steel Scrap

Pankaj Kumar, Sunil Kumar Tripathy, Nilamadhaba Sahu, Gajanan U. Kapure

Research output: Contribution to journalArticlepeer-review

Abstract

Chromite ore processing tailings and low-grade manganese ores are typically considered waste due to their limited or negligible utility, leading to environmental and storage concerns. Researchers globally have explored various methods to utilize or upgrade these wastes, particularly because dumping chromite ore has been linked to severe health issues through Cr(VI) leaching. Individually, these ores lack economic value, and there has not been research on simultaneously reducing both low-grade ores. In this study, the focus lies on smelting these ores together, aiming to create a precursor alloy for 200 series stainless steel scrap. Initial research indicated the potential for scrap formation, validated through lab experiments with varying coke rate, basicity, and holding time. The investigation discovered that smelting this combination could yield a metal product comprising 59% Fe, 24.93% Cr, 7.56% Mn, 0.62% Ni, and 0.93% Si. The optimum basicity was found to be 0.6 with 80% recovery. Notably, this process eliminates intermediate steps in 200 series stainless steel production, potentially reducing overall CO2 emissions. This proposed method represents a cleaner, sustainable approach to repurpose these two waste ores, projecting a net profit of USD 330 per ton.

Original languageEnglish (US)
Pages (from-to)297-309
Number of pages13
JournalMining, Metallurgy and Exploration
Volume41
Issue number1
DOIs
StatePublished - Feb 2024
Externally publishedYes

Bibliographical note

Publisher Copyright:
© Society for Mining, Metallurgy & Exploration Inc. 2024.

Keywords

  • COPT
  • Low-grade ore
  • Nickel ore
  • Smelting
  • Stainless steel scrap
  • Submerged arc furnace

Fingerprint

Dive into the research topics of 'Valorization From Waste: Combined Reduction of Chromite Ore Processing Tailing and Sub-Grade Manganese Ore to Produce 200 Series Stainless Steel Scrap'. Together they form a unique fingerprint.

Cite this