Prarancangan Pabrik Pembuatan Kalsium Fluorida dari Amonium Fluorida dan Kalsium Hidroksida Melalui Proses Presipitasi Amonium Fluorida dan Kalsium Hidroksida dengan Kapasitas 150.000 Ton/Tahun

Abstract

The chemical industry in Indonesia is a very vital factor which can act as an intermediary between upstream and downstream industries. One example of results from upstream industry is calcium fluoride chemical products. The use of calcium fluoride in the industrial sector is very broad, namely in the glass, ceramics, steel, aluminum and cosmetics industrial sectors. Indonesia currently imports calcium fluoride, and taking into account the predicted imports for the next few years and factories in several countries that are already running, a calcium fluoride factory can be established in Indonesia and start operating in 2031. The pre-designed calcium fluoride manufacturing plant operates for 330 days a year. In designing a calcium fluoride manufacturing plant using ammonium fluoride and calcium hydroxide as raw materials through ammonium fluoride and calcium hydroxide precipitation processes with a capacity of 150,000 tons/year uses five stages, namely: raw material storage stage, raw material mixing stage, product formation reaction stage, filtrate and cake separation stage in centrifugation, printing stage and product drying. The planned factory location is a factory location in the Petis Sari Village area, Bunga District, Gresik Regency, East Java, Indonesia with a required land area of 33,942.9910 m2. The workforce required is 144 people with the factory business entity being a Limited Liability Company (PT) with a line and staff organizational structure. The economic evaluation shows that the total investment capital is IDR "748,080,085,982.21", Total Production Costs IDR. 1,531,539,715,385.17, Sales Proceeds Rp. 1,926,375,000,000.00, Net Profit Rp. 262,620,464,268.86, Profit Margin (PM) of 12.78%, Break Even Point (BEP) of 42,65%, Return on Investment (ROI) of 21,67%, Pay Out Time (POT) of 4,61 years ≈ 4 years, 6 months, Return on Network (RON) of 36,12%, Internal Rate of Return (IRR) of 22,80%. From the results of the economic aspect analysis, it can be concluded that this factory is feasible to establish.

Key words: Ammonium Fluoride, Calcium Fluoride, Calcium Hydroxide, Precipitation.