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Sari, Erlin Purwita
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Chemical Engineering, Chemistry & Bioengineering Chemistry

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Pemisahan Zirkon dari Tailing Tambang Timah Menggunakan Magnetic Separator Sajima, Sajima; Sudaryadi, Sudaryadi; Sari, Erlin Purwita
Indonesian Journal of Chemical Science Vol 9 No 3 (2020)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/ijcs.v9i3.41648

Abstract

Abstrak PEMISAHAN ZIRKON DARI TAILING TAMBANG TIMAH MENGGUNAKAN MAGNETIK SEPARATOR. Telah dilakukan pengambilan mineral zirkon dari tailing tambang timah menggunakan magnetic separator. Tahapan proses diawali dengan pembuatan umpan dengan cara memasukkan air ke dalam feeder, dilanjutkan penambahan mineral tailing tambang timah kemudian diaduk. Sumber magnet dihidupkan dan diatur arus listrik yang digunakan. Umpan dicurahkan ke dalam bejana untuk proses pemisahan. Hasil proses berupa konsentrat non-magnetik dan magnetik diambil kemudian dikeringkan menggunakan oven pada tempratur 105 °C kemudian dianalisis kandungan zirkonnya menggunakan spektrometer pendar sinar X. Penelitian ini mempelajari pengaruh arus listrik dan waktu pemisahan terhadap mineral non-magnetik yang terambil serta kandungan zirkonnya. Hasil percobaan menunjukkan bahwa kuat arus optimal pada 16 A dan lama pemisahan 6 menit. Pada kondisi tersebut mineral non-magnetik terpisahkan sebesar 48,5% dengan kandungan ZrO2 sebanyak 47,9%. Kata Kunci: Kuat arus, pemisah magnetik, tailing tambang timah, pasir zirkon Abstract ZIRCON SEPARATION FROM THE TIN MINE TAILING USING MAGNETIC SEPARATOR. Zircon mineral extraction has been carried out from tin mine tailings using a magnetic separator. The process stage begins with making the bait by putting water into the feeder, continued with adding the mineral mine tailings and followed by stirring process. The magnetic source was turned on and the electric current used was controlled. Bait is poured into the vessel for the separation process. The results of process in the form of non-magnetic and magnetic concentrates were taken and dried using an oven at 105 °C and then the zircon content be analyzed using an X-ray fluorescent spectrometer. The experimental results show that the optimal current strength is 16 A and separation time of 6 min. Under these conditions the non-magnetic minerals were separated by 48.5% with a ZrO2 content of 47.9%. Key words: Currents, magnetic separator, tin mine tailings, zircon sand
Extraction of Zr in Gold Mine Tailings to Produce TENORM Free Zirconium Oxychloride Octahidrate (ZOC) Sari, Erlin Purwita; Sajima, Sajima; Prabasiwi, Devi Swasti; Poernomo, Herry
Indonesian Journal of Chemical Science Vol 10 No 2 (2021)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/ijcs.v10i2.47923

Abstract

Gold mine tailings causes environmental problems if disposed without previous processing. Nowadays, secondary resources recycling has become people worldwide consideration because the increasing awareness of the sustainable development urgency. This study aims to extract the valuable mineral content in gold mine tailings to produce ZOC. The research begins with an alkaline fusion process using NaOH. The water leaching process was performed to the smelted alkaline with ratio of solids mass to water volume of 1:30. The resulted solid was dried for further used in the synthesis of ZOC. A number of ZOCs were reacted with HCl at a ratio of solid mass to HCl volume of 1:20, HCl 4N, and temperature of 60 °C for 1.5 hours. The solution then be crystallized to obtain ZOC solids without centrifugation process. This reaction was done using 1-step ZOC synthesis method without passing over zirconium base sulfate (ZBS) manufacturing phase. The ZOC crystals were analyzed using FTIR, XRD, and XRF. The data indicated that the synthesized product was identified as zirconium oxychloride octahydrate (ZrOCl2·8H2O). The compound showed 0% of ThO2 and U3O8 content or could be called TENORM free. The calculation results showed that the % recovery of Zr was 85.94%.
PREPARASI DAN KARAKTERISASI SILIKA LIMBAH LEACHING ZIRKON SEBAGAI ADSORBEN ION Fe(III) Uriastanti, Octavia; Mahatmanti, F. Widhi Tri; Prasetya, Agung Tri; Sari, Erlin Purwita
Indonesian Journal of Chemical Science Vol 5 No 3 (2016)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/ijcs.v5i3.10413

Abstract

Studi tentang preparasi silika dari limbah leaching zirkon untuk proses adsorpsi ion Fe(III) telah dilakukan. Hasil preparasi silika di manfaatkan dalam proses adsorpsi ion Fe(III). Limbah leaching zirkon dipreparasi melalui 3 tahap yaitu leaching, pencucian dan pengeringan. Hasil penelitian menunjukkan bahwa karakteristik silika hasil preparasi memiliki struktur amorf sesuai hasil analisis XRD, dan analisis SAA menunjukkan luas permukaan sebesar 232,6872 m2/g serta ukuran mesopori. Pemanfaatan silika dalam proses adsorpsi ion Fe(III), diperoleh kapasitas adsorpsi terbesar pada variasi konsentrasi 150 ppm. Adsorpsi ion Fe(III) menggunakan silika dari limbah leaching zirkon mengikuti isoterm Freundlich dengan harga Kf yaitu 41,557 dan n sebesar 6,9252.
Pemisahan Zirkon dari Tailing Tambang Timah Menggunakan Magnetic Separator Sajima, Sajima; Sudaryadi, Sudaryadi; Sari, Erlin Purwita
Indonesian Journal of Chemical Science Vol 9 No 3 (2020)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/ijcs.v9i3.41648

Abstract

Abstrak PEMISAHAN ZIRKON DARI TAILING TAMBANG TIMAH MENGGUNAKAN MAGNETIK SEPARATOR. Telah dilakukan pengambilan mineral zirkon dari tailing tambang timah menggunakan magnetic separator. Tahapan proses diawali dengan pembuatan umpan dengan cara memasukkan air ke dalam feeder, dilanjutkan penambahan mineral tailing tambang timah kemudian diaduk. Sumber magnet dihidupkan dan diatur arus listrik yang digunakan. Umpan dicurahkan ke dalam bejana untuk proses pemisahan. Hasil proses berupa konsentrat non-magnetik dan magnetik diambil kemudian dikeringkan menggunakan oven pada tempratur 105 °C kemudian dianalisis kandungan zirkonnya menggunakan spektrometer pendar sinar X. Penelitian ini mempelajari pengaruh arus listrik dan waktu pemisahan terhadap mineral non-magnetik yang terambil serta kandungan zirkonnya. Hasil percobaan menunjukkan bahwa kuat arus optimal pada 16 A dan lama pemisahan 6 menit. Pada kondisi tersebut mineral non-magnetik terpisahkan sebesar 48,5% dengan kandungan ZrO2 sebanyak 47,9%. Kata Kunci: Kuat arus, pemisah magnetik, tailing tambang timah, pasir zirkon Abstract ZIRCON SEPARATION FROM THE TIN MINE TAILING USING MAGNETIC SEPARATOR. Zircon mineral extraction has been carried out from tin mine tailings using a magnetic separator. The process stage begins with making the bait by putting water into the feeder, continued with adding the mineral mine tailings and followed by stirring process. The magnetic source was turned on and the electric current used was controlled. Bait is poured into the vessel for the separation process. The results of process in the form of non-magnetic and magnetic concentrates were taken and dried using an oven at 105 °C and then the zircon content be analyzed using an X-ray fluorescent spectrometer. The experimental results show that the optimal current strength is 16 A and separation time of 6 min. Under these conditions the non-magnetic minerals were separated by 48.5% with a ZrO2 content of 47.9%. Key words: Currents, magnetic separator, tin mine tailings, zircon sand
Extraction of Zr in Gold Mine Tailings to Produce TENORM Free Zirconium Oxychloride Octahidrate (ZOC) Sari, Erlin Purwita; Sajima, Sajima; Prabasiwi, Devi Swasti; Poernomo, Herry
Indonesian Journal of Chemical Science Vol 10 No 2 (2021)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/ijcs.v10i2.47923

Abstract

Gold mine tailings causes environmental problems if disposed without previous processing. Nowadays, secondary resources recycling has become people worldwide consideration because the increasing awareness of the sustainable development urgency. This study aims to extract the valuable mineral content in gold mine tailings to produce ZOC. The research begins with an alkaline fusion process using NaOH. The water leaching process was performed to the smelted alkaline with ratio of solids mass to water volume of 1:30. The resulted solid was dried for further used in the synthesis of ZOC. A number of ZOCs were reacted with HCl at a ratio of solid mass to HCl volume of 1:20, HCl 4N, and temperature of 60 °C for 1.5 hours. The solution then be crystallized to obtain ZOC solids without centrifugation process. This reaction was done using 1-step ZOC synthesis method without passing over zirconium base sulfate (ZBS) manufacturing phase. The ZOC crystals were analyzed using FTIR, XRD, and XRF. The data indicated that the synthesized product was identified as zirconium oxychloride octahydrate (ZrOCl2·8H2O). The compound showed 0% of ThO2 and U3O8 content or could be called TENORM free. The calculation results showed that the % recovery of Zr was 85.94%.
Co-Authors Agung Tri Prasetya F Widhi Mahatmanti Herry Poernomo octavia uriastanti, octavia Prabasiwi, Devi Swasti Sajima, Sajima Sudaryadi, Sudaryadi