Plant Design of Gypsum Using Limestone and Sulfuric Acid with Capacity 150,000 Tons/Year

Munarsyah, Tryas and -, Kusmiyati, S.T., M.T., Ph.D. and -, Eni Budiyati, S.T., M.Eng (2017) Plant Design of Gypsum Using Limestone and Sulfuric Acid with Capacity 150,000 Tons/Year. Skripsi thesis, Universitas Muhammadiyah Surakarta.

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Abstract

Gypsum demand in Indonesia came from domestic production and imported from abroad. But gypsum production in this country is still not sufficient to gain the demand of gypsum in Indonesia. This happen because the increasing of demand for cement including wallboard as building material. So that, with the establishment of gypsum plant with a capacity 150,000 tons/year can fulfil demand of gypsum and make incame to Indonesia. In this plant design, gypsum obtained from limestone reacted with dilute sulfuric acid 50% of weight in Tubular Tank Reactor (RATB). The operation condition of reactor at 95 °C of tempertature and pressure at 1 atm with weight ratio between the limestone and sulfuric acid are 1:1 in kilograms and conversion is 90% at 0.589 hours of residence time of reaction. Production of gypsum (92%) as 18,939.394 kg/hours needs raw material limestone as 11, 324.314 kg/hours and 10,348.097 kg/hours of sulfuric acid. The resulting product from reactor then inserted into separator and resize equipment’s to remove its impurity and obtained the same size of product such as rotary drum vacuum filter, rotary dryer, ball mill and vibrating screen. This plant is planed at Indarung city 2020 year with large of area 50,000 m2 and need 220 of employee’s. Plant of gypsum used fix capital invesment Rp 1,194,144,151,670.040 and manufacturing cost as Rp 740,273,364,660.05. From economic analysis this plant shows profit before and after tax are Rp 780,529,055,232 and Rp 546,370,338,662. Return on Investment (ROI) before and after tax are 65% and 46%. Pay Out Time (POT) before and after tax during 1.33 year and 1.79 year. Break Even Point (BEP) as 49.97%, Shut Down Point (SDP) as 34.48%, Internal Ret Return (i) obtained as 43%. According to the economic analysis we can resume that this plant is apropriate to esthablished.

Item Type: Thesis (Skripsi)
Uncontrolled Keywords: continues stirred tank reactor, gypsum, limestone, sulfuric acid.
Subjects: Q Science > QD Chemistry
Divisions: Fakultas Teknik > Teknik Kimia
Depositing User: TRYAS MUNARSYAH
Date Deposited: 20 Oct 2017 03:04
Last Modified: 20 Oct 2017 03:04
URI: http://eprints.ums.ac.id/id/eprint/56371

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