Electronic Theses and Dissertation

Prarancangan pabrik Magnesium Oksida (MgO) menggunakan dolomit (CaMg(CO3)2¬), asam klrorida (HCl), dan ammonium hidroksida (NH4OH) sebagai bahan baku. Proses produksi secara keseluruhan menggunakan proses Leaching-Precipitation-Pyrohydrolysis. Kapasitas produksi sebesar 40.000 ton/tahun dengan waktu operasi 330 hari/tahun dan waktu 24 jam/hari. Pabrik ini direncanakan dibangun di Manyarejo, Kecamatan Manyar, Kabupaten Gresik, Jawa Timur, Indonesia dengan luas area pabrik 20.275 m2. Bentuk perusahaan yang direncanakan adalah Perseroan Terbatas (PT) dengan menggunakan metode struktur organisasi garis dan staf dan tenaga kerja sebanyak 128 orang. Kebutuhan air untuk pabrik berasal dari Sungai Bengawan Solo dengan laju alir 41.968,08 kg/jam, dan untuk kebutuhan listrik diperoleh dari generator dengan daya 1.622,37 kW. Hasil analisis ekonomi diperoleh sebagai berikut:
a. Fixed Capital Invesment = Rp 435.973.430.945
b. Working Capital Invesment = Rp 76.936.487.814
c. Total Capital Invesment = Rp 512.909.918.758
d. Total Production Cost = Rp 4.433.656.861.083
e. Hasil Penjualan = Rp 4.570.365.132.021
f. Laba bersih = Rp 106.632.451.332
g. Pay Out Time (POT) = 6 tahun 9 bulan
h. Break Event Point (BEP) = 65,7%
i. Internal Rate of Return (IRR) = 14,23%
Berdasarkan studi kelayakan teknis dan ekonomis diatas, maka dapat disimpulkan bahwa prarancangan pabrik magnesium oksida ini layak untuk dilanjutkan ke tahap rancangan.

This preliminary design of a magnesium oxide (MgO) plant uses dolomite (CaMg(CO₃)₂), hydrochloric acid (HCl), and ammonium hydroxide (NH₄OH) as raw materials. The overall production process uses the Leaching–Precipitation–Pyrohydrolysis method. The production capacity is 40,000 tons/year with an operating time of 330 working days/year and 24 hours/day. This factory is planned to be built in Manyarejo, Manyar District, Gresik Regency, East Java, Indonesia with a factory area of 20.275 m². The planned form of the company is a Limited Liability Company (PT) using the line and staff organizational structure method and a workforce of 128 people. The water requirement for the factory comes from the Bengawan Solo River with a flow rate of 41.968,08 kg/hours and for electricity needs it is obtained from a generator with a power of 1.622,37 kW. The results of the economic analysis are obtained as follows: a. Fixed Capital Invesment = Rp 435.973.430.945 b. Working Capital Invesment = Rp 76.936.487.814 c. Total Capital Invesment = Rp 512.909.918.758 d. Total Production Cost = Rp 4.433.656.861.083 e. Sales Cost = Rp 4.570.365.132.021 f. Net Profit = Rp 106.632.451.332 g. Pay Out Time (POT) = 6 years 9 months h. Break Event Point (BEP) = 65,7% i. Internal Rate of Return (IRR) = 14,23% Based on the technical and economic feasibility studies above, it can be concluded that the Preliminary Plant Design of the magnesium oxide Plant is feasible to proceed to the design stage.