Muhammad Asri Idris
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Preferred name
Muhammad Asri Idris
Official Name
Muhammad Asri , Idris
Alternative Name
Idris, Muhammad Asri
Idris, M. A.
Idris, M. Asri
Asri Idris, Muhammad
in Idris, Muhammad Asri
Main Affiliation
Scopus Author ID
24802030700
Researcher ID
N-1142-2017

Research Output
Now showing 1 - 3 of 3
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Mineralogical characterizations of Langkawi ilmenite ore for carbothermal reduction

2022-01-01 , Mohammed A.I. , Nur Farhana Diyana Mohd Yunos , Muhammad Asri Idris , Zul Azhar Zahid Jamal , Nur Farhana Hayazi , Nomura T.

The mineralogical characterizations of Langkawi’s ilmenite were investigated using XRD, XRF and SEM/EDS for morphological analysis. The minerals mainly consisted the phases of FeTiO3, Fe3O4 and TiO2 and Rietveld refinement indicated that the ore contained 35.85% of TiO2 and 26.52% of Fe3O4. The amount of the elements calculated form the quantitative and XRF analysis are reliable and in acceptable ranges. The morphology of the ore showed that the ore is formed mainly in sub-rounded grains with titanium and iron as main elements. The ore was categorized as a low-grade ore, but it can be upgraded for TiO2 production using carbothermal reduction reactions, where the results of XRD, XRF, SEM showed extractable amount of TiO2 more than 32wt%.

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Phase transformations of Langkawi ilmenite ore during carbothermal reduction using palm char as renewable reductant

2022-02-01 , Mohammed A.I. , Nur Farhana Diyana Mohd Yunos , Muhammad Asri Idris , Nur Hazira Najmi , Zul Azhar Zahid Jamal , Nomura, Takahiro

The phase transformations of carbothermal reduction of Langkawi ilmenite ore by palm char were studied in reduction temperatures ranging from 1200 °C, 1300 °C, and 1400 °C using a horizontal tube furnace with inert argon gas. The palm shells as renewable carbon reductant for carbothermal reduction of ilmenite ore were converted into palm char using pyrolysis techniques to improve and increase the surface area and carbon content. The present study aims to reduce oxides in ilmenite ore from our local mining to produce titanium oxides by carbothermal reduction process and recycled agricultural waste from palm shell as renewable reductant. The phase and chemical compositions of ilmenite ore and reduced samples were analyzed by XRD and XRF. It was found that ilmenite ore mainly contained titanomagnetite, hematite, and titanium dioxide phases. After carbothermal reduction, the titanomagnetite phase from ilmenite ore was transformed into titanium dioxide, iron titania, iron, and titanium carbide at the highest reduction temperature (1400 °C) via XRD analysis. The phase transformation revealed the porous structure with wider pore size distribution and high carbon from palm char was able to reduce the oxides in ilmenite ore. According to XRF analysis, the TiO2 amount was increased with the temperature; from 25.7 wt.% at 1200 °C up to 50.8 wt.% with the extent of reduction of TiO2 was 78.56% at 1400 °C. The carbothermal reduction of ilmenite ore using palm char as a renewable reductant was possible and promising in mineral ore extractions.

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Phase evolution during carbothermal reduction of langkawi ilmenite ore at different reaction times

2020-01-01 , Nur Farhana Diyana Mohd Yunos , Chong J.H. , Mohamed A.I. , Muhammad Asri Idris

In this research, the carbothermal reduction of Langkawi ilmenite ore, FeTiO3 had been conducted by using coke as carbon reductant. All samples were grinded into size of ≤ 63 µm and pelletized using 2.5 g mixture of ilmenite ore with coke based on C/O molar ratio of 1:3 (carbon to reducible oxygen). The carbothermal reduction was conducted in a horizontal tube furnace using 0.1 L/min of argon gas flow at temperature of 1200°C. The ultimate and proximate analysis of carbon reductant was investigated using carbon, hydrogen, oxygen, nitrogen and sulfur (CHONS) analyzer. The phase evolutions and chemical composition analysis was conducted using X-ray diffraction (XRD) and X-ray fluorescence (XRF) for raw ilmenite and reduced ilmenite with coke, respectively. The reduction time was set with 2, 3 and 4 hours to understand the phase evolutions. It was found that Langkawi ilmenite ore contained mainly higher TiO2 and hematite, Fe2O3 where the phases of FeTiO3 and titanomagnetite, (Fe2TiO4-Fe3O4) were detected using XRD. The phase of FeTiO3 evolved into the production of Fe, FeO, TiC, TiO2 and Fe3C when increased the reduction time from 2 to 4 hours. The amount of Fe2O3 production was decreased from 59.16 to 47.02 wt%, while higher value of TiO2 was obtained, increasing from 25.2 to 29.1 wt% due to the reduction of TiO2 to Ti3O5 as the reduction time increased. TiC content is also detected when the reduction time increased by reducing TiCxOy into TiC.

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