par Borra, Chenna Rao;Saida, Shaik;Kar, Manish Kumar;Venkatesan, Prakash 
;Singh, Veerendra;Ӧnal, Mehmet Ali Recai
Référence Mining, Metallurgy and Exploration, 40, 1, page (121-129)
Publication Publié, 2023-02-01
;Singh, Veerendra;Ӧnal, Mehmet Ali RecaiRéférence Mining, Metallurgy and Exploration, 40, 1, page (121-129)
Publication Publié, 2023-02-01
Article révisé par les pairs
| Résumé : | A laboratory-scale investigation of the effect of milling operation and catalyst addition (K2CO3) on the partial reduction of low-grade pyrolusite ore pellets was carried out using coke as a reductant. Thermogravimetric analysis was used to understand the correlation between milling and catalyst addition parameters with the reduction temperatures. DTG analysis of pyrolusite pellet reduction showed three distinctive peaks associated with a three-step reduction mechanism (i.e., MnO2→Mn2O3→Mn3O4→MnO). The results showed that the grinding and addition of the catalyst have a significant effect on lowering the MnO2 reduction temperature independently. But maximum reduction temperature drop is obtained when combining grinding and catalyst addition in this work. By 3 h milling and 10 wt% catalyst addition, the reduction temperatures were reduced by more than 200 °C compared to the raw ore pellets. These results obtained from the DTG analysis were further supported by XRD analysis of the reduced samples. |
