Pra Rancangan Pabrik Pembuatan Silika Gel dari Fly Ash Batubara dengan Kapasitas 30.000 Ton/Tahun dan Tugas Khusus Rancangan Keteknikan Detail Reaktor

Abstract

This thesis for making silica gel from coal fly ash was prepared with a production capacity of 30,000 tons/year using the Supra Yield process. This process takes place in a reactor with a temperature of 100°C and a pressure of 1 atm. In the reactor, the hydrolysis process of silicon dioxide with sodium hydroxide occurs to produce sodium silicate. The specific task in this thesis is the detailed design of the reactor. The company in this thesis is planned to be a Limited Liability Company (PT) using a line and staff organizational structure. The number of workers needed to run the factory is 145 people. The factory location is planned to be in Bhinor Village, Paiton District, Probolinggo Regency, East Java Province, Indonesia. With a total land area of 20,000 m2. The water requirements for this factory are planned to be obtained from the Jabung River with a total water demand of 188,583.39 kg/hour. The results of the economic analysis of this thesis are as follows: Total investment capital is Rp. 1,515,590,383,374.50 and total production costs Rp. 2,492,551,160,976.59. Sales proceeds Rp. 3,000,000,000,000. Net profit Rp. 348.164.903.570. Profit margin (PM) 16,91%. Break even point (BEP) 21,03 % . Return on investment (ROI) 22,97 %. Pay out time (POT) 4.35 Tahun. Return on network (RON) 38,29 %. Internal rate of return (IRR) 25,64 %. From the results of the economic analysis, it can be concluded that making Silica Gel from Coal Fly Ash is feasible for setting up a factory.