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All Journal Indonesian Mining Journal Indonesian Mining Journal
AGUS WAHYUDI
R & D Centre for Mineral and Coal Technology
Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Energy Engineering Environmental Science Materials Science & Nanotechnology

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Journal : Indonesian Mining Journal

 1 
A LITERATURE STUDY OF BENEFITING K-BEARING SILICATE ROCKS AS RAW MATERIALS FOR POTASSIUM FERTILIZER Agus Wahyudi; Tatang Wahyudi
Indonesian Mining Journal Vol 16 No 2 (2013): INDONESIAN MINING JOURNAL Vol. 16 No. 2 June 2013
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol16.No2.2013.428

Abstract

As an agricultural country Indonesia requires NPK fertilizer up to 2.6 million tons per year. However, such a number is mostly fulfilled by imports, particularly potassium (K) fertilizer. Almost a 100% of K-fertilizer comes from Canada and Russia in the form of KCl (sylvite) salt. Indonesia does not have sylvite mineral, but retains some K-bearing minerals such as K-feldspar and leucite. Both are different in characteristics from sylvite. K-feldspar and leucite are the alumino-silicate minerals. They require special treatment to process them into K-fertilizer. Several techniques can be applied to process both minerals, such as by mechano-chemistry, leaching, alkali fusion and bioleaching. Research on the utilization of K-source minerals as a raw material for K fertilizer is rela- tively rare. The opportunity to conduct such a research is widely open, as currently conducted by the Research and Development Centre for Mineral and Coal Technology.
EXTRACTION OF POTASSIUM FROM FELDSPAR AND LEUCITE BY TWO DIFFERENT ACTIVATION METH- ODS: MECHANICAL ACTIVATION (MILLING) AND HIGH TEMPERATURE ACTIVATION (ROASTING) AGUS WAHYUDI; DESSY AMALIA; HADI PURNOMO
Indonesian Mining Journal Vol 14 No 2 (2011): INDONESIAN MINING JOURNAL Vol. 14 No. 2 June 2011
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol14.No2.2011.496

Abstract

One of the most important elements in fertilizers is potassium that can be devided from felsdpar and leucite minerals. Both are composed of various minerals and need to be separated from its impurities to get the desired minerals. In this research, test of mineral activation was performed using two different methods, namely mechanical activation (milling) and activation that used high temperature (roasting). The results were followed by potassium extraction process through leaching using sulfuric acid 6 N, 20% solids for 2 hours without heating. The best result was obtained from a 60-hour mechanically, activated leucite in leaching condition and conducted without heating. To evaluate potassium dissolution with soil when applied as fertilizer, the test of solubility in citric acid-the analogy of acid humus within soil-was conducted. The product with the best solubility was obtained from a 60-hour milling process. The results show that leucite, activated by milling process, was more easily extracted its potassium. However, further research is still needed to optimize the leachability of potassium extraction.
STUDI PENDAHULUAN: EKSTRAKSI LITIUM DARI FLUIDA PANAS BUMI DIENG MELALUI EKSTRAKSI PELARUT Agus Wahyudi; Andina Septiarani; Hairunnisa; Isyatun Rodliyah
Indonesian Mining Journal Vol 26 No 1 (2023): Indonesian Mining Journal, April 2023
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol26.No1.2023.1477

Abstract

This preliminary study aims to obtain the lithium compounds from a geothermal brine through a solvent extraction. The brine samples were collected from PT Geodipa Energi Geothermal Power Plant in Dieng, Central Java, Indonesia. The ICP analysis was conducted to measure brine chemical composition. Brine’s lithium content was 62.73 ppm with the dominant impurities silica (Si), calcium (Ca), potassium (K), sodium (Na), and boron (B). Silica removal was conducted by centrifugation technic with the addition of flocculants, while calcium removal was achieved by adding sodium carbonate. The CYANEX® 936P was used for the extraction process and was diluted in kerosene (1:1 O/A ratio). The extraction pH was adjusted by adding 10% H2SO4 solution (acid condition) and 10% NH4OH (alkaline condition). The optimum condition for lithium extraction was observed at pH = 11, with the highest lithium recovery of 90%. The eluate from the stripping process was then precipitated by adding Na2CO3 to produce lithium carbonate powder.
Co-Authors Andina Septiarani DESSY AMALIA HADI PURNOMO Hairunnisa Isyatun Rodliyah TATANG WAHYUDI