Kesetimbangan Cair-cair untuk Perhitungan Jumlah Tingkat Mixer Settler pada Pemisahan Konsentrat Neodimium dari Itrium

Nur Dewi Pusporini, Wahyudi Budi Sediawan, Hary Sulistyo, Wahyu Rachmi Pusparini

Abstract


Neodymium (Nd) as raw material for permanent magnet begins to globally develop in various fields. The magnetic quality is far better than other materials such as iron, Al-Ni-Co, Sm-Co, and Sm-Fe-N alloy. However, Nd must be separated from other elements especially yttrium (Y). The presence of Y can reduce the quality of permanent magnet produced since Y has magnetic properties opposite to Nd. One of the separating methods that can be applied is liquid – liquid extraction. Extraction was carried out by using 10% of di-ethyl-hexyl-phosphate (D2EHPA) as the solvent. Information on the phase equilibrium is of importance in the design of large scale extraction system. With a stirring speed of 200 rpm the phase equilibrium conditions were reached after 25 minutes. This study aimed to generate phase equilibrium data and to develop mathematical model to quantitatively describe the phase equilibrium, then to predict the number of extraction stages for the separation. The calculation was done by using stage to stage calculation method based on the mass balance and liquid-liquid equilibrium model proposed. The result shown the number of stages to separate Y from Nd concentrated by using mixer settler is 6 stages with the total recovery of Y is 93%.


Keywords


mixer settler, extraction, neodymium concentrate, yttrium, stage to stage calculation

Full Text:

PDF (Indonesian)

References


Desai DD dan Shinde VM. Liquid Anion-Exchange Extraction and Separation of Yttrium, Neodymium and Samarium. Analytica Chimica Acta 1985; 165: 413-417.

Kraikaew J, Srinuttrakul W dan Chayavadhanakur C. Solvent Extraction Study of Rare Earths from Nitrate Medium by the Mixtures of TBP and D2EHPA in Kerosene. Journal of Metals, Materials and Minerals 2005; 15(2): 89–95.

Mohammadi M, Forsberg K, Kloo L, Cruz JMDL dan Rasmuson Å. Separation of ND(III), DY(III) and Y(III) by solvent extraction using D2EHPA and EHEHPA. Hydrometallurgy 2015; 156: 215–24.

Panda N, Devi N dan Mishra S. Solvent extraction of neodymium (III) from acidic nitrate medium using Cyanex 921 in Kerosene. Journal of Rare Earths 2012; 30(8): 794–97.

Parhi PK, Sethy TR, Rout dan Sarangi K. Separation and recovery of neodymium and praseodymium from permanent magnet scrap through hydrometallurgical route. Separation Science and Technology. 2016.

Sato T. Liquid-liquid extraction of rare-earth element from aqueous acid solutions by acid organophosphorus compounds. Hydrometallurgy 1989; 22: 121-140.

Seaman J. Rare Earths and Clean Energy: Analyzing China’s Upper Hand. 2010.

Skokov KP dan Gut O. Heavy rare earth free, free rare earth and rare earth free magnets - Vision and reality. Scripta Materialia 2018; 1–6.

TDK Corporation. Ferrite Magnets FB Series. 2014.

Terpstra M. Improving The Properties of Permanent Magnets. Elsevier Inc, New York, USA. 1999.

Tim LTJ PSTA - PTBGN, BATAN. Penyusunan Disain Konsep Dan Tekno-Ekonomi Pabrik Pengolahan Monasit Menjadi Cerium Oksida, Lantanum Oksida Dan Konsentrat Neodimium Kapasitas 1000 Ton/ Tahun. Yogyakarta. 2018.

Tjokrokardono, Soeprapto, Soetopo B dan Ngadenin. Tinjauan Sumberdaya Monasit Di Indonesia Sebagai Pendukung Litbang/Industri Superkonduktor. Seminar Iptek Nuklir dan Pengelolaan Sumber Daya Tambang. 2002.

Xie F, Zhang TA, Dreisinger D dan Doyle F. A critical review on solvent extraction of rare earths from aqueous solutions. Minerals Engineering 2014; 56: 10–28.


Refbacks

  • There are currently no refbacks.