ABSTRAKKeberadaan zirkon (ZrSiO 4 ) di alam kebanyakan berasosiasi dengan beberapa senyawa oksida berharga (SOB) seperti TiO 2 dan oksida logam tanah jarang atau rare earth oxides (REO). Keterdapatan mineral alam di Indonesia yang mengandung zirkonium (Zr) dan REO tersebar di 13 wilayah mulai dari Provinsi Aceh sampai Papua Barat. Berdasarkan hal tersebut, maka tujuan penelitian adalah melakukan kajian integrasi teknologi pengolahan pasir zirkon lokal yang mengandung TiO 2 dan REO. 4 dalam satu kawasan pilot plant atau pabrik yang terintegrasi. Hasil kajian disimpulkan bahwa konsep pengolahan pasir zirkon lokal yang mengandung monasit, senotim, dan ilmenit dapat dilakukan secara terintegrasi dalam satu kawasan pabrik dengan hasil multi produk. Jika hal tersebut dapat direalisasikan di Indonesia dengan tambahan sistem pengolahan air limbah terpadu, maka selain aman bagi lingkungan juga dapat menghemat biaya produksi dan memberikan nilai tambah ekonomi bagi para pemegang izin usaha pertambangan zirkon.Kata kunci:pengolahan, pasir zirkon, ilmenit, monasit, senotim ABSTRACT The existence of zircon (ZrSiO 4 ) in the nature is mostly associated with some of the valuable oxide compounds (VOC), such as TiO 2 and rare earth oxides (REO). The existence of natural minerals in Indonesia containing zirconium (Zr) and REO lies in 13 regions, ranging from Aceh to West Papua province. Based on those aforementioned aspects, the goal of this research is to conduct the study of integrated technology of local zircon sand processing containing TiO 2 and REO. The study was conducted by analyzing the content of VOC in zircon sand samples from the areas of Landak and Tumbang Titi West Kalimantan and Bangka by using XRF. Based on the content of VOC in this zircon sand, it can be predicted that the zircon sand from the area of Landak and Tumbang Titi West Kalimantan and Bangka contains mineral zircon (ZrSiO 4 ), ilmenite (FeTiO
THERMAL DECOMPOSITION KINETICS OF LANTHANUM OXALATE HYDRATE PRODUCT TREATMENT FROM MONAZITE. Unreacted shrinking core model variation was developed for calcination and solid thermal decomposition reaction to non-catalytic gas and no gas reactants were involved. In this research, thermal decomposition of lanthanum oxalate hydrate product treatment of monazite was studied. The parameters for modeling are time and temperature of thermal decomposition. The time was between 0-150 minutes with 30 minutes intervals and the temperature range between 600-700 o C with 100 o C intervals. Based on the experimental data it can be concluded that the most suitable model was unreacted core sphere ash diffusion controls and obtained the relation between temperature o C with diffusion coefficient following equation = 0.0011 + 0.5175 with linearity R² = 0.9561. Another possible model was the sphere reaction control and obtained the relationship between 1/ (K) and reaction rate constant was = 48873.e-4.88 / with activation energy = 4.88 kJ. The relationship between time t with (radius of particles at time t) at various temperatures and the relation between temperature and at various times follows the exponential line equation. If temperature and time parameters were combined, the relation between time and temperature with following the equation ln =-0.9536 (9E-04 + 0.005) + 4.9976 will be found.
Telah dilakukan penelitian pelindian ilmenit dari tailing pengolahan pasir zirkon. Tailing pengolahan pasir zirkon mengandung Zr, Ti, Nb dan Fe. Pada penelitian ini akan dilakukan penentuan kimetika pelindian (leaching) Ti dalam ilmenit memakai HCl. Pada penentuan laju reaksi meliputi pengaruh perbandingan HCl dengan berat ilmenit, M HCl dan suhu reaksi. Percobaan untuk menentukan tetapan laju reaksi dilakukan dengan memvariasi suhu reaksi dengan parameter waktu mulai 0 sampai 250 menit dan suhu proses mulai 700C sampai 1080C. Dari hasil penelitian pelindian Ti dalam ilmenit memakai HCl, dapat diambil kesimpulan bahwa semakin besar perbandingan HCl dengan berat ilmenit, M HCl dan suhu reaksi, laju reaksi semakin cepat. Laju reaksi pada 50 menit pertama berkisar antara 0,0021 – 0,0032 gmol/l.menit dan laju reaksi pada 250 menit berkisar antara 0,0005 – 0,0007 gmol/l.menit untuk variasi perbandingan HCl dengan berat ilmenit = 4 – 20. Laju reaksi pada 50 menit pertama berkisar antara 0,0012 – 0,0026 gmol/l.menit dan laju reaksi pada 250 menit berkisar antara 0,0004 – 0,0006 gmol/l.menit untuk M HCl = 8 – 12,23 M.. Laju reaksi pada 50 menit pertama berkisar antara 0,0012 – 0,0032 gmol/l.menit dan laju reaksi pada 250 menit berkisar antara 0,0002 – 0,0006 gmol/l.menit pada reaksi = 70 – 1080C. Reaksi pelindian Ti dalam ilmenit merupakan reaksi orde kedua. hubungan antara suhu (T) dengan tetapan laju reaksi (k). ln k = -5383,5/T + 6,6149 atau k = 6,6149.e- 5383,5/T, faktor frekuensi A = 746,130, energi aktivasi E = 44758,419 kj/mol.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.