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All Journal INTEKNA Journal of Metallurgical Engineering and Processing Technology Jurnal Teknologi Sumberdaya Mineral
Mantika, Sabrina
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Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Mechanical Engineering Other

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EVALUASI PENAMBAHAN BAHAN IMBUH SILIKA PADA PROSES CONVERTER NIKEL MENGGUNAKAN FACTSAGE DI PT VALE INDONESIA Ni'immallaili Hadining, Wanidya; Mantika, Sabrina
INTEKNA Jurnal Informasi Teknik dan Niaga Vol 25 No 1 (2025): Jurnal INTEKNA, Volume 25, No. 1, Mei 2025
Publisher : P3M Politeknik Negeri Banjarmasin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31961/intekna.v25i1.14890

Abstract

Proses pemurnian nikel matte di unit converter PT. Vale Indonesia melibatkan penambahan bahan imbuh silika (SiO2) untuk mengikat FeO membentuk terak stabil berupa fayalite. Penelitian ini bertujuan untuk mengevaluasi efisiensi penambahan fluks silika terhadap performa proses konversi menggunakan simulasi termodinamika Factsage dan log operasional lapangan. Metode yang digunakan meliputi karakterisasi kimia menggunakan XRF pada berbagai material input dan slag hasil konversi. Simulasi kesetimbangan fasa pada 1200oC menggunakan modul Equilib dari Factsage, serta perhitungan rasio massa slag terhadap logam hilang. Hasil menunjukkan bahwa penambahan silika menurunkan kadar Fe dan S dalam matte secara signifikan, sekaligus meningkatkan kadar Ni hingga 78%. Namun, deviasi penambahan fluks yang terlalu tinggi, khususnya pada blow ke-10 menyebabkan akumulasi SiO2 bebas dalam slag dan berpotensi meningkatkan viskositas serta menurunkan efisiensi pemisahan. Evaluasi terhadap diagram terner dan perbandingan rasio massa menunjukkan pentingnya kontrol rasio Fe/SiO2 agar posisi komposisi slag tetap berada dalam zona slag cair dan fasa fayalit.
AAS and XRD Analysis of Gold Ore Bioflotation Results with Aloe Vera as an Environmentally Friendly Reagent Mantika, Sabrina; Prillasasti, Farra Diva; Nugrah Aurigha, Evan; Amelia, Rike; Rickiadi, M. Fajar; Wahyuningsih, Tri
Journal of Metallurgical Engineering and Processing Technology Vol 4, No 2 (February 2024)
Publisher : Universitas Pembangunan Nasional "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v4i2.11394

Abstract

Flotation is a mineral concentration method that involves floating the minerals so that they can be separated from the gangue by the addition of reagents. The reagents used are chemicals such as frother and collector, which can potentially contaminate the environment. This research explores the potential use of aloe vera as a separating reagent in environmentally friendly gold ore flotation. The feed used consists of 300 grams of gold ore, and the flotation time is set at 15 minutes. XRD analysis is employed to determine the types of minerals contained in the sample, revealing that the sample consists of 97.64% quartz; Enstatite, syn 1.21%; and Clinochlore-1A 1.16%. Atomic Absorption Spectrophotometry (AAS) is the technique used to determine the metal concentration in a sample. AAS analysis indicates an Au concentration in the feed of 3.94 ppm. The Au concentration in the concentrate with the addition of aloe vera extract is 10.57, and in the tailings, it is 0.92, higher than the concentration in the concentrate without the addition of aloe vera extract, which is 10.11, with 1.89 in the tailings. The %recovery from these concentrations with the addition of aloe vera extract is 84.06%, while without the addition of aloe vera extract, it is 63.78%. This study provides evidence that the use of aloe vera in the gold ore flotation process can be a sustainable and environmentally friendly alternative in the effort to improve the separation of valuable minerals from impurities.
Optimalisasi Pengendalian Rasio ICP Boat dengan Limbah Brick Ladle Converter Matte (Al2O3-SiO2) Menggunakan Simulasi Factsage Mantika, Sabrina; Mirahati, Riria Zendy
Jurnal Teknologi Sumberdaya Mineral Vol. 5 No. 1 (2024)
Publisher : Program Studi Teknik Pertambangan Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/jeneral.v5i1.45489

Abstract

The purification process to increase the nickel content is carried out in a Pierce Smith converter through several stages, including charging, blowing, skimming, dry up, and casting, resulting in a nickel matte with a 75-78% nickel content. After casting, the nickel matte is stored in ladles, with each converter being able to accommodate the casting of 7 ladles, each with a capacity of about 15.5 tons. These ladles are made of carbon steel with a brick lining, consisting of castables on the walls and alumina brick on the bottom. Repeated pouring of matte into the ladles can cause surface erosion due to high heat input and matte friction, as well as chemical issues such as build-up. The refractory material in these ladles will undergo a total relining scheme, resulting in waste brick classified as B3 waste. The potential of the waste brick in the ladles is still quite high in producing residual nickel matte in a homogenized form. Therefore, the waste brick from the ladles will be considered to be mixed with ICP Boat with specific composition and distribution. The resulting mixture will be used as feed in the converter purification process by reviewing the variation of the waste brick to ICP Boat ratio using FactSage software simulation and validating the results through field experiments. FactSage software simulation recommends an improvement in the waste brick to ICP Boat mixture ratio of about 4.6-12% at a temperature of 1200°C to prevent the formation of spinel and olivine Keywords: Converter, ladle, brick, ICP boat, FactSage
Co-Authors Amelia, Rike Mirahati, Riria Zendy Ni'immallaili Hadining, Wanidya Nugrah Aurigha, Evan Prillasasti, Farra Diva Rickiadi, M. Fajar Tri Wahyuningsih