Laporan Magang Mandiri 14 Juli-14 November 2025 Di PT. Magnesium Gosari Internasional

Denya, Alfidah Nur (2025) Laporan Magang Mandiri 14 Juli-14 November 2025 Di PT. Magnesium Gosari Internasional. Project Report. [s.n]. (Unpublished)

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Abstract

Proses pengeringan batuan dolomit pada Vertical Roll Mill (VRM) di PT Magnesium Gosari Internasional memerlukan energi panas yang besar sehingga pengendalian suhu operasi menjadi faktor penting dalam menentukan efisiensi proses. Kondisi operasi aktual menunjukkan penggunaan energi yang belum optimal dan berdampak pada tingginya konsumsi bahan bakar kayu. Penelitian ini bertujuan menentukan suhu operasi hot air inlet yang mampu meningkatkan efisiensi termal proses pengeringan tanpa mengurangi kualitas produk. Analisis dilakukan menggunakan pendekatan neraca massa, neraca energi, perhitungan kebutuhan energi pengeringan, dan efisiensi termal berdasarkan data operasi aktual perusahaan. Hasil analisis menunjukkan bahwa suhu hot air inlet optimum sebesar 220°C, lebih rendah dibandingkan kondisi aktual sebesar 288°C. Pada kondisi tersebut diperoleh efisiensi termal sebesar 99,85% dengan heat loss sebesar 0,15%. Optimasi suhu juga menurunkan konsumsi kayu bakar dari 48 ton/hari menjadi 25,61 ton/hari atau sebesar 46,66%, serta mengurangi biaya pembelian kayu bakar dari Rp540.000.000/bulan menjadi Rp315.000.000/bulan atau sebesar 41,66%. Hasil penelitian menunjukkan bahwa optimasi suhu operasi pada sistem pengeringan VRM mampu meningkatkan efisiensi energi, menekan konsumsi bahan bakar dan biaya operasional, serta tetap mempertahankan kualitas produk sesuai standar perusahaan.
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The dolomite rock drying process in the Vertical Roll Mill (VRM) at PT Magnesium Gosari Internasional requires a significant amount of thermal energy, making control of the operating temperature a critical factor in determining process efficiency. Actual operating conditions indicate that energy use is not yet optimal, resulting in high wood fuel consumption. This study aims to determine the optimal hot air inlet temperature that can improve the thermal efficiency of the drying process without compromising product quality. The analysis was conducted using mass balance and energy balance approaches, calculations of drying energy requirements, and thermal efficiency assessments based on the company’s actual operating data. The results indicate that the optimal hot air inlet temperature is 220°C, which is lower than the current operating temperature of 288°C. Under these conditions, a thermal efficiency of 99.85% was achieved, with a heat loss of 0.15%. Temperature optimization also reduced firewood consumption from 48 metric tons/day to 25.61 metric tons/day a 46.66% decrease and lowered firewood procurement costs from Rp540,000,000/month to Rp315,000,000/month, representing a 41.66% reduction. The research results show that optimizing the operating temperature of the VRM drying system can improve energy efficiency, reduce fuel consumption and operating costs, and maintain product quality in accordance with company standards.

Item Type:	Monograph (Project Report)
Uncontrolled Keywords:	Vertical Roll Mill (VRM); pengeringan dolomit; efisiensi termal; optimasi suhu; konsumsi bahan bakar=======================================================Vertical Roll Mill (VRM); dolomite drying; thermal efficiency; temperature optimization; fuel consumption.
Subjects:	T Technology > T Technology (General) T Technology > T Technology (General) > T57.5 Data Processing T Technology > TP Chemical technology T Technology > TP Chemical technology > TP155.7 Chemical processes. T Technology > TP Chemical technology > TP245.C3 Calcium carbonate. T Technology > TS Manufactures
Divisions:	Faculty of Vocational > 24305-Industrial Chemical Engineering
Depositing User:	Alfidah Nur Denya
Date Deposited:	17 Jul 2026 06:21
Last Modified:	17 Jul 2026 06:21
URI:	http://repository.its.ac.id/id/eprint/135119

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