ANALISIS UNSUR ENDAPAN BAUKSIT MENGGUNAKAN X-RAY FLUORESCENCE (XRF) PT. ANTAM TBK. UNIT GEOMIN DAERAH KENCO KABUPATEN LANDAK PROVINSI KALIMANTAN BARAT

  • Jafar N
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Abstract

INTISARI Bauksit terbentuk dari batuan yang mempunyai kadar aluminium (Al) nisbi tinggi, kadar besi (Fe) rendah dan tidak atau sedikit mengandung kuarsa (SiO2). Bentuknya menyerupai tanah liat/cellular dan kadang-kadang berstruktur pisolitik. Secara makroskopis bauksit berbentuk amorf, kekerasan bauksit berkisar antara 1-3 Skala Mohs dan berat jenis berkisar antara 2,5-2,6. Bauksit merupakan bahan heterogen yang mempunyai mineral dengan susunan terutama dari oksida aluminium, yaitu berupa mineral gibbsite (Al2O3.3H2O), mineral boehmit (Al2O.3H2O), mineral diaspor (Al2O3.3H2O). Secara umum bauksit layak tambang mengandung Al2O3 sebanyak 45-65%, SiO2 1-12%, Fe2O3 2-25%, TiO2 >3%, dan H2O 14-36%. Persentase unsur bauksit akan menentukan langkah selanjutnya seperti perhitungan cadangan dan perancangan metode penambangan. Kandungan bauksit pada daerah penelitian adalah aluminium (Al2O3), besi (Fe2O3), silika (SiO2) dan titanium (TiO2). Kata Kunci: Bauksit, Aluminium, Silika, XRF, PT. Antam Tbk Unit Geomin. ABSTRACK Bauxite is formed from rocks that have high aluminum (Al), low iron (Fe) levels and no or little quartz (SiO2). The shape resembles clay/cellular and sometimes structured pisolitik. Macroscopically bauxite is amorphous, bauxite hardness ranges from 1-3 Mohs Scale and the specific gravity ranges from 2.5 to 2.6. Bauxite is a heterogeneous material, which has a mineral with an arrangement mainly of aluminum oxide, which is gibbsite mineral (Al2O3.3H2O, mineral boehmit (Al2O.3H2O), mineral diaspor (Al2O3.3H2O). Generally, the mine-worthy bauxite containing Al2O3 contains 45-65%, SiO2 1-12%, Fe2O3 2-25%, TiO2 > 3%, and H2O 14-36%. The percentage of the bauxite element will determine the next steps such as the calculation of reserves and the design of mining methods. The bauxite content in the study area was aluminum (Al2O3), iron (Fe2O3), silica (SiO2) and titanium (TiO2).

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APA

Jafar, N. (2017). ANALISIS UNSUR ENDAPAN BAUKSIT MENGGUNAKAN X-RAY FLUORESCENCE (XRF) PT. ANTAM TBK. UNIT GEOMIN DAERAH KENCO KABUPATEN LANDAK PROVINSI KALIMANTAN BARAT. Journal Of Chemical Process Engineering, 2(1), 46. https://doi.org/10.33536/jcpe.v2i1.115

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