An Investigation on the Extraction of High-Carbon Ferrochrome with an Environmental Approach

Journal of Environmental Friendly Materials

مقاله 6، دوره 6، شماره 2 - شماره پیاپی 12، اسفند 2022، صفحه 27-30   

نوع مقاله: Original Article

نویسندگان

A Anbarzadeh¹؛ M. S Ghiyasi Nejad²؛ M Mirzamohammadi²؛ S Abbasi Geravand³

¹Department of Mechanical Engineering, Technical and Vocational University (TVU), Tehran, Iran

²Department of Materials and Metallurgical Engineering, Technical and Vocational University (TVU), Tehran, Iran

³Department of Biomedical Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran

چکیده

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

کلیدواژه‌ها

High Carbon Ferrochrome؛ Extraction Process؛ Chromium Carbide؛ Cr6+