Studi pengaruh jumlah kalium hidroksida yang digunakan dalam proses recovery timah dari terak timah dengan metode roasting menggunakan pelindian air hangat = Study of effect of potassium hydroxide used in tin recovery process from tin slags with roasting method using warm water leaching / Ferdinand Mangasi

Studi pengaruh pemanggangan pada 700 oc dan variasi konsentrasi larutan naoh dan hcl pada proses pelindian terhadap peningkatan kadar tantalum dan niobium oksida dalam terak timah = The study of effect 700 oc roasting and leaching process with concentration variable of naoh and hcl solutions for increasing tantalum and niobium oxide s grade in tin slag

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

Studi pengaruh proses reduksi pemanggangan dan waktu pelindian amonium bikarbonat terhadap perolehan nikel dari bijih limonit

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