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A Decarbonization Approach for FeCr Production.

Hasan Güney¹, Öykü Güner¹, Furkan Ferhat Boncuk¹

¹Department of Metallurgical and Materials Engineering, Istanbul Technical University, Sariyer, Istanbul, 34469 Turkey.

Journal of Sustainable Metallurgy

|July 31, 2023

Summary

This study demonstrates ferrochrome production from fine-grained chromite concentrate using EAF-assisted metallothermic smelting. Optimal conditions yielded high chromium content and recovery in the produced alloys.

Keywords:

Aluminothermy Aluminum white dross Energy saving Ferrochromium Low CO2 emission

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Area of Science:

Metallurgical Engineering
Materials Science

Background:

Chromite concentrate is a primary source of chromium.
Efficient ferrochrome production is crucial for industries like steelmaking.
Existing methods face challenges with fine-grained concentrates.

Purpose of the Study:

Investigate the EAF-assisted metallothermic reduction of chromite concentrates.
Determine the impact of key process variables on metal and slag composition and recovery.
Assess the feasibility of producing ferrochrome from fine-grained chromite concentrate.

Main Methods:

EAF-assisted metallothermic smelting of chromite concentrates.
Systematic variation of aluminum powder and dross addition.
Adjustment of smelting time and flux ratios.
Analysis of metal and slag compositions and chromium recovery.

Main Results:

Ferrochrome production is feasible from fine-grained chromite concentrate using this method.
Optimized conditions led to a maximum chromium content of 59.5 wt. % in alloys.
The highest chromium recovery achieved was 76.7 wt. % from chromite concentrate to alloys.

Conclusions:

EAF-assisted metallothermic smelting is a viable route for ferrochrome production from fine-grained chromite.
Process parameters significantly influence alloy composition and chromium recovery.
This method offers potential for utilizing challenging chromite feedstocks.