Studi Pengaruh Penambahan Massa CaO Terhadap Stabilitas Termal dan Ketahanan Mekanis Refraktori MgO-SiO2 pada Cement Rotary Kiln

Pratama, Varian Aditya (2025) Studi Pengaruh Penambahan Massa CaO Terhadap Stabilitas Termal dan Ketahanan Mekanis Refraktori MgO-SiO2 pada Cement Rotary Kiln. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Industri semen dan metalurgi membutuhkan material refraktori yang tahan terhadap suhu tinggi dan memiliki ketahanan mekanik yang baik. Forsterite (Mg₂SiO₄) dikenal sebagai material refraktori berbasis MgO–SiO₂ dengan kestabilan termal yang baik, namun masih memiliki kekurangan pada kekuatan mekanik dan ketahanan aus. Penelitian ini bertujuan untuk mengevaluasi pengaruh penambahan CaO terhadap pembentukan fasa dan performa termal-mekanik material refraktori MgO–SiO₂. Tiga variasi komposisi CaO (0%, 5%, dan 10%), dengan kode sampel MGS, MGSC5, dan MGSC10 disintesis melalui metode sintering pada suhu 1300°C, menghasilkan tiga sampel dengan kode MGS, MGSC5, dan MGSC10. Karakterisasi dilakukan melalui XRF untuk CaO sintesis, XRD, SEM, serta pengujian kekuatan tekan dingin (CCS), abrasi, dan stabilitas termal (TGA). Hasil XRF menunjukkan kadar CaO dalam proses sintesis melalui CaCO3 sebesar 89,9%. XRD mengidentifikasi forsterite sebagai fasa dominan di seluruh sampel, sementara fasa sekunder monticellite mulai muncul pada MGSC10. Citra SEM menunjukkan bahwa penambahan CaO mengurangi porositas, menandakan peningkatan densifikasi butir, terlihat dari pengujian SEM-EDX pada ketiga sampel. Hasil uji CCS menunjukkan peningkatan signifikan dari 2,787 MPa (MGS) menjadi 4,240 MPa (MGSC10), sedangkan laju abrasi menurun dari 43,386 cm3/min pada sampel MGS menjadi 14,68 cm3/min pada kode sampel MGSC10. Stabilitas termal berdasarkan TGA menunjukkan penurunan massa sebesar 0,396% pada MGS menjadi hanya 0,044% pada MGSC10. Secara keseluruhan, penambahan CaO hingga 10% secara signifikan meningkatkan pembentukan fasa sekunder yang memperkuat ikatan butir, meningkatkan kekuatan tekan, menurunkan abrasi, serta meningkatkan stabilitas termal, menjadikan material ini lebih layak digunakan dalam aplikasi suhu tinggi seperti Cement Rotary Kiln.
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The cement and metallurgy industries require refractory materials that are resistant to high temperatures and have good mechanical strength. Forsterite (Mg₂SiO₄) is known as an MgO–SiO₂-based refractory material with good thermal stability, but it still has shortcomings in terms of mechanical strength and wear resistance. This study aims to evaluate the effect of CaO addition on phase formation and the thermal-mechanical performance of MgO–SiO₂ refractory materials. Three variations of CaO composition (0%, 5%, and 10%), with sample codes MGS, MGSC5, and MGSC10, were synthesized using the sintering method at 1300°C, resulting in three samples with codes MGS, MGSC5, and MGSC10. Characterization was performed using XRF for CaO synthesis, XRD, SEM, as well as cold compressive strength (CCS), abrasion, and thermal stability (TGA) testing. XRF results showed a CaO content of 89.9% in the synthesis process using CaCO₃. XRD identified forsterite as the dominant phase in all samples, while the secondary phase monticellite began to appear in MGSC10. SEM images showed that the addition of CaO reduced Porosity, indicating increased grain densification, as observed in SEM-EDX testing of the three samples. CCS test results showed a significant increase from 2.787 MPa (MGS) to 4.240 MPa (MGSC10), while the abrasion rate decreased from 43.386 cm³/min in the MGS sample to 14.68 cm³/min in the MGSC10 sample. Thermal stability based on TGA analysis showed a decrease in mass from 0.396% in MGS to only 0.044% in MGSC10. Overall, the addition of CaO up to 10% significantly enhances the formation of secondary phases that strengthen grain bonding, increase compressive strength, reduce abrasion, and improve thermal stability, making this material more suitable for high-temperature applications such as Cement Rotary Kilns.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	CaO, forsterite, ketahanan mekanis, material refraktori, MgO–SiO₂, sintering, stabilitas termal, CaO, forsterite, mechanical resistance, refractory material, MgO–SiO₂, sintering, thermal stability
Subjects:	Q Science > QD Chemistry T Technology > TA Engineering (General). Civil engineering (General) > TA169.5 Failure analysis T Technology > TP Chemical technology > TP245.C3 Calcium carbonate. T Technology > TS Manufactures > TS170 New products. Product Development
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Physics Engineering > 30201-(S1) Undergraduate Thesis
Depositing User:	Varian Aditya Pratama
Date Deposited:	01 Aug 2025 03:15
Last Modified:	01 Aug 2025 03:15
URI:	http://repository.its.ac.id/id/eprint/124972

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