OPTIMALISASI PROSES PEMURNIAN SILIKON TINGKAT METALURGI MENGGUNAKAN CAMPURAN LARUTAN ASAM HCl DAN HF
DOI:
https://doi.org/10.30556/jtmb.Vol14.No1.2018.148Kata Kunci:
silikon tingkat metalurgi, pelindian, efisiensi ekstraksi, efektivitas larutanAbstrak
Telah dilakukan percobaan pemurnian Metallurgical Grade Silicon (MG-Si) atau silikon tingkat metalurgi melalui proses pelindian. Proses pelindian menggunakan campuran larutan asam pada konsentrasi 2,45 mol/L HCl + 1,2 mol/L HF yang dilakukan dengan memvariasikan waktu pelindian pada suhu 60°C dengan kecepatan putar 300 rpm. Hasil percobaan menunjukkan bahwa proses pelindian MG-Si dengan menggunakan campuran larutan asam pada konsentrasi 2,45M HCl + 1,2M HF dapat menurunkan unsur pengotor yang terkandung di dalam MG-Si dan meningkatkan kemurnian seiring peningkatan waktu pelindian. Pada proses pelindian 12 jam, efisiensi ekstraksi unsur pengotor Al dan Fe mencapai 99,99%, sedangkan untuk unsur Ti mencapai 99,96%. Persentase efektivitas dari larutan pelindian selama 12 jam mencapai 99,96%.Pencapaian tersebut berpeluang untuk ditingkatkan dengan memvariasikan konsentrasi maupun waktu pelindian sehingga diperoleh nilai optimal.
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