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Isyatun Rodliyah, Isyatun
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Aglomerasi minyak-batubara untuk perolehan batubara halus Rodliyah, Isyatun; Ardha, Ngurah
Jurnal Teknologi Mineral dan Batubara Vol 4, No 12 (2008)
Publisher : Puslitbang tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (16.273 KB)

Abstract

Batubara halus umumnya  terdapat sebagai limbah pencucian dan/atau pemanfaatan batubara yang sepertinya mengurangi perolehan batubara dan mencemari lingkungan. Aglomerasi minyak-batubara (COA) adalah salah satu metode memperoleh batubara halus dengan cara aglomerasi dan kemudian memisahkan aglomerat batubara halus dari mineral berat. Metode ini juga bermanfaat untuk meminimalisasi masalah lingkungan akibat pembuangan batubara halus. Percobaan ini mempelajari pengambilan batubara halus dalam bentuk aglomerat minyak-batubara.. Variable proses yang telah dicoba pengaruhnya  adalah; waktu kontak/aduk campuran minyak- batubara-air, konsentrasi minyak, jenis minyak dan jenis batubara. Dari karakteristik proses aglomerasi diketahui bahwa pengaruh kandungan karbon pada batubara/kokas terhadap perolehan aglomerat kurang berarti, dibandingkan dengan pengaruh kandungan abu rendah pada batubara/kokas. Kata kunci : batubara, batubara halus, aglomerasi minyak batubara.
STUDI PERBANDINGAN PROSES PELINDIAN UNTUK EKSTRAKSI SKANDIUM DARI TERAK RESIDU BAUKSIT Sariman; Rochani, Siti; Saleh, Nuryadi; Rodliyah, Isyatun; Dianawati, Erika Arum; Wijayanti, Retno
Jurnal Teknologi Mineral dan Batubara Vol 19 No 3 (2023): Jurnal Teknologi Mineral dan Batubara Edisi September 2023
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/jtmb.Vol19.No3.2023.1509

Abstract

Scandium is classified as a rare earth element. Its existences are geochemically in small amounts as associate minerals. Consequently, scandium production is minimally from processing residues of major minerals. Indonesia has large bauxite deposits, and it is processed into alumina, producing bauxite residue as a by-product. The bauxite residue contains rare earth metals, including scandium. In this study, various ways of extracting scandium from bauxite residue slag were carried out. The bauxite residue beneficiation process was done through a smelting reduction process followed by magnetic separation. Scandium extractions were carried out from the bauxite residue slag through a leaching process with concentrated sulfuric, sulfation, alkali fusion, and a 2-stage acid leaching. The best percentage of scandium extracted was obtained at 88.40%, using the 2-stage acid leaching at the acid concentration of 500 g/kg, the temperature of 90oC, and the leaching time at 3 hours for each leaching stage. In addition, the best neodymium extracted achieved  76,97%, using the alkali fusion, fused in NaOH at 700oC for 3 hours.
STUDI PERBANDINGAN PROSES PELINDIAN UNTUK EKSTRAKSI SKANDIUM DARI TERAK RESIDU BAUKSIT Sariman; Rochani, Siti; Saleh, Nuryadi; Rodliyah, Isyatun; Dianawati, Erika Arum; Wijayanti, Retno
Jurnal Teknologi Mineral dan Batubara Vol 19 No 3 (2023): Jurnal Teknologi Mineral dan Batubara Edisi September 2023
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/jtmb.Vol19.No3.2023.1509

Abstract

Scandium is classified as a rare earth element. Its existences are geochemically in small amounts as associate minerals. Consequently, scandium production is minimally from processing residues of major minerals. Indonesia has large bauxite deposits, and it is processed into alumina, producing bauxite residue as a by-product. The bauxite residue contains rare earth metals, including scandium. In this study, various ways of extracting scandium from bauxite residue slag were carried out. The bauxite residue beneficiation process was done through a smelting reduction process followed by magnetic separation. Scandium extractions were carried out from the bauxite residue slag through a leaching process with concentrated sulfuric, sulfation, alkali fusion, and a 2-stage acid leaching. The best percentage of scandium extracted was obtained at 88.40%, using the 2-stage acid leaching at the acid concentration of 500 g/kg, the temperature of 90oC, and the leaching time at 3 hours for each leaching stage. In addition, the best neodymium extracted achieved  76,97%, using the alkali fusion, fused in NaOH at 700oC for 3 hours.
Co-Authors . Sariman Dianawati, Erika Arum Ngurah Ardha, Ngurah Nuryadi Saleh, Nuryadi Retno Wijayanti SARIMAN Siti Rochani, Siti