Studi pengaruh kadar pH terhadap pengambilan Ni dan Co pada ekstraksi terak nikel melalui proses double stage leaching = Study of pH effect on extract Ni and Co in nickel slag extraction with double stage leaching

Studi pengaruh konsentrasi NaOH pada pelindian limonit terhadap kadar akhir nikel dan kobalt = Study on the effect of NaOH concentration on limonite leaching toward final contents of nickel and cobalt

Studi pengaruh ukuran partikel, temperatur, waktu tahan, dan kadar reduktor terhadap proses pra-reduksi Bijih Nikel Laterit = Study of the effect of particle size, temperature, reduction time, and reductor concentration on the pre-reduction process of Nickel Laterite Ore

Pengaruh Konsentrasi, Temperatur, dan Waktu Pada Proses Pelindian HCl Terhadap Ekstraksi Besi dan Magnesium Dari Terak Feronikel = The Effect of Leaching Agent Concentration, Leaching Time, and Leaching Temperature in HCl Leaching Process to Extraction of Iron and Magnesium from Ferronickel Slag

Studi pengaruh penambahan batubara pada proses roasting reduction bijih nikel saprolit dan pelindian (leaching) dalam larutan asam sulfat 1 molar = Study of coal addition effect on roasting reduction process of saprolitic nickel ore and leaching in sulfuric acid 1 molar