Karakterisasi dan pengujian sifat kemagnetan pasir besi ekstraksi di Wilayah Lampung Tengah telah dilakukan. Penelitian ini bertujuan untuk mengetahui kandungan mineral dan sifat kemagnetan dari pasir besi di daerah Bekri Kabupaten Lampung Tengah dengan menggunakan metode presipitasi basa. Penelitian ini dilakukan di Laboratorium Fisika, Institut Teknologi Sumatera pada bulan Juni hingga September 2018. Kandungan mineral pasir dianalisis menggunakan X-Ray Diffractometer (XRD). Hasil analisis ekstraksi pasir besi dengan variasi suhu 80oC, 120oC, dan 160oC berturut-turut berukuran 33.76 nm, 11.84 nm dan 11.14 nm. Sedangkan hasil analisis ekstraksi pasir besi dengan lama pengadukan yaitu 2 jam, 4 jam, dan 6 jam berturut-turut memiliki ukuran partikel 43.12 nm, 11.14 nm, dan 11.32 nm. Hasil analisis kandungan mineral pasir besi di wilayah Lampung Tengah didominasi oleh Ilmenite dan Potassium Chloride. Kurva histerisis Vibrating Sample Magnetometer (VSM) menunjukkan bahwa pasir besi ekstraksi dari Lampung Tengah merupakan material antiferomagnetik dengan nilai magnetisasi saturasi maksimum (Ms) sebesar 5.78 memu (mili emu), magnetisasi remanen (Mr) 1.13 memu dan nilai medan koersivitas sebesar 851.68 Oe.
Characteristics and Mineral Content of Lampung Tengah Ironsands. This study is carried out to investigate the characteristics and mineral content of ironsands from Bekri, Lampung Tengah Regency by using precipitation method. The research was conducted in Physics Laboratory of Institut Teknologi Sumatera from June to September 2018. Mineral content of sand is analayzed with X-Ray Diffractometer. The extraction was varied in temperature and stirring time. The temperature is varied in 80oC, 120oC, dan 160oC and yields different size; 33.76 nm, 11.84 nm and 11.14 nm. Meanwhile, the extraction is varied for 2 hours, 4 hours and 6 hours stirring and yields particle with 43.12 nm, 11.14 nm and 11.32 size. Mineral content of ironsands in Lampung Tengah are dominated by Ilmenite and Potassium Chloride.
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