Evaluasi Performa Batu Magnesia – Chromite Sebagai Refractory Flash Smelting Furnace Area Industri Peleburan Tembaga

Sebayang, Dedy Permana Gunari (2025) Evaluasi Performa Batu Magnesia – Chromite Sebagai Refractory Flash Smelting Furnace Area Industri Peleburan Tembaga. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Permintaan terhadap material tahan api (refraktori) terus meningkat, terutama dalam industri peleburan tembaga, Flash Smelting Furnace (FSF) memerlukan refraktori yang mampu menahan suhu tinggi dan interaksi kimia agresif. Penelitian ini mengevaluasi performa batu magnesia – chromite sebagai refraktori pada FSF melalui uji XRD, XRF, SEM – EDX serta uji mekanik seperti Permanent Linear Change, Crushing Strength, Bulk Density, Porosity dan Thermal Conductivity.
Hasil pengujian awal menunjukkan batu ini memiliki ketahanan tinggi terhadap thermal shock dengan nilai thermal expansion -0,3%, cold crushing strength 63,4 Mpa, bulk density 3,22 g/cm3, porosity 12,76% dan thermal conductivity 2,8 – 2,9 W/m.K. Setelah simulasi operasi FSF, terbentuk fasa forsterite akibat reaksi MgO dan SiO2 dari slag, yang mempercepat degradasi karena ketahanannya lebih rendah terhadap suhu tinggi. XRF menunjukkan penurunan MgO dan peningkatan Si dan Fe, menandakan difusi unsur slag ke dalam refraktori.
Meskipun terjadi perubahan mikrostruktur, fasa spinel MgCr2O4 tetap stabil, dengan kadar Cr meningkat dari 11, 55% menjadi 13,47 % dan oksigen sekitar 39%. Ini menunjukkan bahwa Magnesia – Chromite tetap memiliki ketahanan parsial terhadap kondisi ekstrem dalam FSF dan layak digunakan dengan desain material yang tepat.
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The Demand For Refractory Materials Continues To Increase, Particularly In The Copper Smelting Industry. Flash Smelting Funaces (FSF) Require Refractories That Can Withstand High Temperatures And Aggressive Chemical Interactions. This Study Evaluates The Performance Of Magnesia – Chromite Brick As Refractory Materials In FSF Through XRD, XRF, SEM – EDX Analyses, As Well As Mechanical Tests Such As Permanent Linear Change, Cold Crushing Strength, Bulk Density And Thermal Conductivity. Initial Test Results Show That The Brick Has High Resistance To Thermal Shock, With A Thermal Expansion Value Of -0.3% Cold Crushing Strength Of 63.4 Mpa, Bulk Density Of 3.22 G/Cm3, Porosity Of 12.76% And Thermal Conductivity Ranging From 2.8 To 2.9 W/M.K. After FSF Operation Simulation, The Formation Of Forsterite Phase Was Observed Due To The Reaction Between Mgo And Sio2 From The Slag, Which Accelerates Degredation Due To Its Lower Resistance To High Temperatures. XRF Analysis Indicated A Decrease In Mgo And An Increase In Si And Fe, Suggesting Element Diffusion From The Slag Into The Refractory. Although Microstructural Changes Occurred, The Mgcr2o4 Spinel Phase Remained Stable, With Cr Content Increasing From 11.55% To 13.47% And Oxygen Content Around 39%. This Indicates That Magnesia – Chromite Still Maintains Partial Resistance Under Extreme FSF Conditions And Is Suitable For Use With Proper Material Design.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Refractory , Magnesia – Chromite Stone, FSF, XRD, SEM - EDX
Subjects:	T Technology > TN Mining engineering. Metallurgy > TN690 Metallography. Physical metallurgy
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 27101-(S2) Master Thesis
Depositing User:	Dedy Permana Gunari Sebayang
Date Deposited:	08 Aug 2025 06:18
Last Modified:	08 Aug 2025 06:18
URI:	http://repository.its.ac.id/id/eprint/127973

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