An Investigation on the Extraction of High-Carbon Ferrochrome with an Environmental Approach
الموضوعات : Journal of Environmental Friendly MaterialsA Anbarzadeh 1 , M. S Ghiyasi Nejad 2 , M Mirzamohammadi 3 , S Abbasi Geravand 4
1 - Department of Mechanical Engineering, Technical and Vocational University (TVU), Tehran, Iran
2 - Department of Materials and Metallurgical Engineering, Technical and Vocational University (TVU),
Tehran, Iran
3 - Department of Materials and Metallurgical Engineering, Technical and Vocational University (TVU),
Tehran, Iran
4 - Department of Biomedical Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran
الکلمات المفتاحية:
ملخص المقالة :
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
