An Investigation on the Extraction of High-Carbon Ferrochrome with an Environmental Approach
Article Type:
Research/Original Article (بدون رتبه معتبر)

The main minerals containing chromium are chromite mineral compounds. Ferrochrome is divided into three groups: high carbon, medium carbon and low carbon. Chromite mineral has a cubic lattice and belongs to spinel category. In the present study, Fe-Cr-C three-component diagrams are presented along with chemical compounds of ferrochromium. In the following, the extraction of high carbon ferrochromium is further investigated. Fe-Cr-C ternary diagrams confirm that Cr3C2 decomposition at temperatures below 1600°C in minerals with 60 wt% Cr and 8 wt% C results in Cr7C3 composition. Finally, a solution to reduce the most toxic chromium ion (Cr6+) in the leachate of the extraction process is presented. Cr6+ is the most toxic species among its different oxidation states. Cr6+ is also toxic to aquatic animals, plants, and bacteria. Cr3+ is 100 times less toxic than Cr6+. In humans and in small quantities, chromium is an essential nutrient required for sugar and lipid metabolism, but in excess it may cause cancer and allergic skin reactions.

Journal of Environmental Friendly Materials, Volume:6 Issue: 2, Summer-Autumn 2022
27 to 30  
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