Electronic Theses and Dissertation

Prarancangan pabrik Magnesium Karbonat (MgCO₃) dari dolomit dengan proses hidrasi dan karbonisasi dirancang dengan kapasitas produksi 300.000 ton/tahun dan beroperasi selama 330 hari/tahun. Pabrik berlokasi di Desa Temandang, Kecamatan Merakurak, Kabupaten Tuban, Provinsi Jawa Timur dengan luas lahan 24.085 m². Bentuk badan usaha yang dipilih adalah Perseroan Terbatas (PT) dengan struktur organisasi garis dan staf serta kebutuhan tenaga kerja sebanyak 180 orang.

Produk utama yang dihasilkan adalah Magnesium Karbonat (MgCO₃) dengan kemurnian 98% sebesar 315.618,81 ton/tahun , sedangkan produk samping berupa Kalsium Karbonat (CaCO₃) dengan kemurnian 89% sebesar 389.952,31 ton/tahun . Kebutuhan air sebesar 107.968,49 kg/jam dipenuhi dari Sungai Bengawan Solo, sedangkan kebutuhan listrik sebesar 1.171,72 kW dipasok dari PLN dengan generator sebagai sumber listrik cadangan. Kebutuhan bahan bakar solar untuk generator sebesar 145,42 L/jam .

Hasil analisis ekonomi menunjukkan bahwa:

1. Fixed Capital Investment (FCI) = Rp644.271.008.234,45
2. Working Capital Investment (WCI) = Rp71.585.667.581,63
3. Total Capital Investment (TCI) = Rp715.856.675.816,08
4. Total Biaya Produksi = Rp1.088.770.283.723,95/tahun
5. Hasil Penjualan = Rp1.282.980.012.785,00/tahun
6. Laba Bersih = Rp136.256.778.834,60/tahun
7. Pay Out Time (POT) = 2,87 tahun
8. Internal Rate of Return (IRR) = 34,00%
9. Break-even Point (BEP) = 36,07%

Berdasarkan hasil analisis teknis dan ekonomis, prarancangan pabrik Magnesium Karbonat (MgCO₃) dari dolomit dengan proses hidrasi dan karbonisasi dinyatakan layak untuk dilanjutkan ke tahap perancangan rinci dan pembangunan pabrik. Selain itu, pabrik ini diharapkan mampu memenuhi kebutuhan Magnesium Karbonat dalam negeri sekaligus meningkatkan nilai tambah sumber daya dolomit di Indonesia.

The preliminary design of a Magnesium Carbonate (MgCO₃) plant using dolomite as the raw material through a hydration–carbonization process is designed with a production capacity of 300,000 tons/year and an operating period of 330 days/year . The plant is planned to be located in Temandang Village, Merakurak District, Tuban Regency, East Java Province, with a total land area of 24,085 m² . The selected business entity is a Limited Liability Company (Perseroan Terbatas/PT) with a line-and-staff organizational structure employing 180 personnel . The main product is Magnesium Carbonate (MgCO₃) with a purity of 98% , amounting to 315,618.81 tons/year , while the by-product is Calcium Carbonate (CaCO₃) with a purity of 89% , amounting to 389,952.31 tons/year . The plant requires 107,968.49 kg/h of water supplied from the Bengawan Solo River. The electricity demand of 1,171.72 kW is provided by the national electricity company (PLN), with a generator serving as a backup power source. The diesel fuel consumption for the generator is 145.42 L/h . The economic evaluation of the proposed plant yields the following results: 1. Fixed Capital Investment (FCI) = Rp644,271,008,234.45 2. Working Capital Investment (WCI) = Rp71,585,667,581.63 3. Total Capital Investment (TCI) = Rp715,856,675,816.08 4. Total Production Cost = Rp1,088,770,283,723.95/year 5. Total Sales Revenue = Rp1,282,980,012,785.00/year 6. Net Profit = Rp136,256,778,834.60/year 7. Pay Out Time (POT) = 2.87 years 8. Internal Rate of Return (IRR) = 34.00% 9. Break-even Point (BEP) = 36.07% Based on the results of the technical and economic feasibility analyses, the preliminary design of the Magnesium Carbonate (MgCO₃) plant using dolomite through the hydration–carbonization process is considered feasible to proceed to the detailed engineering design and plant construction stages. Furthermore, the proposed plant is expected to satisfy domestic demand for Magnesium Carbonate while enhancing the added value of Indonesia's dolomite resources.