Peningkatan kadar dan rasio pasir kromit kadar rendah melalui proses benefisiasi dengan variabel jumlah reduktor batubara dan aditif caso4 pada reduction roasting = The enhancement of chromium grade and its ratio from local low grade chromite sand through beneficiation process with the variation of reductant and caso4 as additive dosage on reduction roasting process

Peningkatan kadar dan rasio mangan pada bijih mangan lokal kadar rendah melalui proses benefisiasi dengan variabel temperatur pada reduction roasting = The enhancement of manganese grade and its ratio from local low grade manganese ore through beneficiation process with the variation of temperature on reduction roasting process

Peningkatan kadar dan rasio pasir kromit kadar rendah melalui proses benefisiasi dengan variabel jumlah penambahan reduktor coal dan aditif caco3 pada reduction roasting = The enhancement of local low grade chromite sand through beneficiation process with the variation of reductant coal and caco3 as additive dosage on reduction roasting process

Peningkatan kadar mangan dan rasio mangan/besi dari bijih mangan kadar rendah lokal melalui proses benefisiasi dengan vasriasi waktu reductio roasting = Enhancement of mn fe ratio from local low grade manganese ore through beneficiation with reduction roasting time as a variant

Peningkatan kadar dan rasio pasir kromit kadar rendah melalui proses benefisiasi dengan variabel jenis reduktor dan jumlah aditif caco3 pada reduction roasting = Enhancing ratio and chromite content of low grade chromite ore through beneficiation with variable type of reductor and amount of additive caco3 reduction roasting