Komposisi Unsur Dan Mineral Dalam Pasir Besi, Residu Bauksit Di Pt. Indonesia Chemical Alumina (Ica) (Elemental Composition and Minerals in Iron Sand, Bauxite Residue at Pt. Indonesia Chemical Alumina (Ica)

Silalahi, Imelda Hotmarisi; Khasanah, Nikmatun; Zaharah, Titin Anita

doi:10.26418/ijopac.v4i3.48986

Cited by 1 publication

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“…Sementara itu, air yang mengalir ke area pembuangan akan mengendap membentuk residu pasir. Berdasarkan hasil analisis XRF, komposisi utama pasir tersebut yaitu unsur besi sebanyak 70,75%, silikon sebanyak 15,297% dan unsur aluminium masih ditemui dalam pasir besi, residu bauksit, sebesar 8,86% dan kadar titanium sebanyak 2,514% [3] . Kandungan tertinggi dalam residu tersebut yaitu unsur besi, sehingga material ini disebut sebagai pasir besi.…”

Section: Pendahuluanunclassified

“…Sisa sampel yang tidak tertarik, ditarik kembali menggunakan magnet batang neodium sehingga diperoleh pasir tertarik magnet neodium sebanyak 128,040 gram yang berwarna hitam kecoklatan (Gambar 1) dan yang tidak tertarik sebanyak 46,359 gram. Pemisahan ini bertujuan untuk memisahkan mineral ilmenit dari mineral non magnetik seperti alumina dan silika [3] . Pasir tertarik magnet kuat tersebut dihaluskan dan digerus, lalu diayak dengan ukuran 200 mesh [4] .…”

Section: Preparasi Sampel Pasir Besiunclassified

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Extraction of Titanium Compounds From Chloride Acid Solution of Bauxite Residue Using Acid-Base Precipitation Method

Ernilia,

Silalahi,

Zaharah

2024

indonesian

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The bauxite residue from the Bayer process can be categorized into red cake and iron sand. In this paper the iron sand has been characterized and used as a research object in order to obtain material with a higher concentration of the titanium element. Iron sand has a dominant chemical content of 60% iron and 10% titanium. Titanium can be extracted by several methods, one of which is the precipitation method. The precipitation process involves dissolving minerals in an acidic solution and extracting them with a base. The type of base and the pH are factors that affect the precipitation process. The aim of this study is to determine the effect of variations in pH and type of base on the extraction of TiO2 from a solution of iron sand in hydrochloric acid and to determine the elemental composition of the precipitation product. The first treatment of the iron sands was magnetic separation, which yielded 31.76% of relatively weakly magnetic sand. The magnetic sand was leached by using HCl (25%) to result in a solid with a percentage recovery of 40.8%, followed by an alkali fusion reaction with NaOH to give 56.85% of material. This material was then dissolved in the concentrated HCl and precipitated with NH4OH and NaOH at various pH values. The elemental analysis by using XRF of the precipitation products shows that the precipitation in NH4OH and pH 8 gives the material with the highest content of the element Ti, which is 49.5%, increases from only 10% in the iron sand. The selectivity of titanium for the iron element seems to be higher for the precipitation in NaOH, pH 8 than in NH4OH, pH 8, with Ti/Fe ratios of 1.50 and 1.44, respectively

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Section: Pendahuluanunclassified

Section: Preparasi Sampel Pasir Besiunclassified