SYAHRIAL, MUTYA HAFADZA HAYA (2023) ANALISIS PROSES RETREATMENT MIDDLING HASIL DARI PENGOLAHAN MINERAL MENGGUNAKAN THREE DISC MAGNETIC SEPARATOR DENGAN VARIASI KUAT MEDAN MAGNET DAN KETEBALAN LAPISAN FEED DI PT TIMAH TBK. Other thesis, UPN "Veteran" Yogyajarta.
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Abstract
iv
ABSTRAK
Penelitian ini dilakukan untuk melakukan proses retreatment middling
berupa ilmenite yang masih bercampur dengan cassiterite yang memiliki
kandungan Sn kurang dari 3% menggunakan alat three disc magnetic separator.
Metodologi penelitian melibatkan eksperimentasi dengan berbagai variasi kuat
medan magnet dan ketebalan lapisan feed, serta analisis kuantitatif
menggunakan XRF.
Penelitian ini bertujuan untuk mendalami pengaruh dari variasi kuat medan
magnet (0,6 Tesla – 2 Tesla) dan ketebalan lapisan feed (2 lapisan dan 3 lapisan)
terhadap nilai recovery dan kadar konsentrat timah (Sn) dan juga menganalisis
kadar dan recovery optimum yang dihasilkan berdasarkan pengaruh kuat medan
magnet dan ketebalan lapisan feed pada proses retreatment middling. Hasil
penelitian menunjukkan distribusi persebaran timah pada setiap fraksi ukuran
sampel. Selain itu, nisbah konsentrasi dan kadar Sn juga bervariasi untuk setiap
variasi pengujian. Salah satu temuan kunci adalah bahwa terdapat hubungan
terbalik antara kadar Sn dengan recovery: semakin tinggi kadar yang
didapatkan, maka perolehan recovery semakin kecil. Kadar Sn (%) tertinggi,
sebesar 27,64%, diperoleh pada pengujian dengan variasi kuat medan magnet
tertinggi dan ketebalan lapisan feed terkecil. Sementara itu, recovery tertinggi
sebesar 43,08% ditemukan pada pengujian dengan kuat medan magnet terkecil
dan ketebalan lapisan feed yang lebih besar.
Berdasarkan hasil penelitian, dapat ditarik beberapa kesimpulan penting,
yaitu untuk mendapatkan kadar Sn tertinggi, dianjurkan untuk menggunakan
ketebalan lapisan feed yang lebih tipis dengan kuat medan magnet yang lebih
tinggi. Namun, untuk mencapai recovery tertinggi, kombinasi yang optimal
adalah ketebalan lapisan feed yang lebih tebal dengan kuat medan magnet yang
lebih rendah. Hasil penelitian ini memberikan wawasan penting bagi industri
pertambangan dan pengolahan mineral, khususnya dalam mengoptimalkan
proses retreatment middling untuk meningkatkan kadar dan recovery timah.
Kata Kunci: Three Disc Magnetic Separator, Retreatment middling, Kuat
Medan Magnet, Ketebalan Lapisan Feed, Kadar & Recovery Timah (Sn)
v
ABSTRACT
This research was conducted to carry out the retreatment process of
middlings in the form of ilmenite mixed with cassiterite that contains Sn of less
than 3% using a three-disc magnetic separator. The research methodology
involved experimentation with various magnetic field strengths and feed layer
thicknesses, as well as a quantitative analysis using XRF.
This research aims to explore the influence of variation in magnetic field
strength (0.6 Tesla – 2 Tesla) and feed layer thickness (2 layers and 3 layers) on
the recovery rate and tin (Sn) concentrate grade. It also analyzes the optimal
grade and recovery produced based on the influence of the magnetic field
strength and feed layer thickness in the retreatment middling process. The
results showed the distribution of tin in each sample size fraction. Moreover,
the concentration ratio and Sn garde also varied for each testing variation. A
key finding is that there's an inverse relationship between Sn grade and
recovery: the higher the grade achieved, the lower the recovery. The highest Sn
grade (%) of 27.64% was obtained in the test with the highest magnetic field
strength and the thinnest feed layer. Meanwhile, the highest recovery rate of
43.08% was found in the test with the lowest magnetic field strength and a
thicker feed layer.
Based on the research results, several important conclusions can be drawn.
To obtain the highest Sn grade, it's recommended to use a thinner feed layer
with a higher magnetic field strength. However, to achieve the highest recovery,
the optimal combination is a thicker feed layer with a lower magnetic field
strength. This research provides valuable insights for the mining and mineral
processing industry, especially in optimizing the retreatment middling process
to increase the grade and recovery of tin.
Keywords: Three Disc Magnetic Separator, Retreatment middling, Magnetic
Field Strength, Feed Layer Thickness, Tin (Sn) Grade & Recovery
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Three Disc Magnetic Separator, Retreatment middling, Magnetic Field Strength, Feed Layer Thickness, Tin (Sn) Grade & Recovery |
| Subjects: | T Technology > T Technology (General) |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | Eko Yuli |
| Date Deposited: | 28 Nov 2023 01:54 |
| Last Modified: | 28 Nov 2023 01:54 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/38235 |
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