Safira, Lutfia Rima (2025) Perhitungan Neraca Massa dan Neraca Energi Tangki Pre-Neutralizer Pabrik Pupuk NPK Phonska IV Departemen Produksi IIB di PT. Petrokimia Gresik. Project Report (Praktek Kerja Lapang). UPN "VETERAN" JAWA TIMUR, UPN "VETERAN" JAWA TIMUR. (Unpublished)
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Abstract
PT. Petrokimia Gresik is one of the fertilizer producers in Indonesia which is a subsidiary of a state-owned company, namely PT. Pupuk Indonesia. PT. Petrokimia Gresik has 3 factories, namely Production I, II, and III. Production II is divided into two, namely Production Compartment IIA and Production Compartment IIB. Production Compartment II-B is part of factory compartment II. Production IIB consists of Phonska IV production units, NPK Granulation II, III, and IV and ZK. Phonska IV Fertilizer (15:15:15) is one of the NPK fertilizer products that has been circulating in the market with a Nitrogen (N) content of 15%, Phosphorus (P2O5) 15%, Potassium (K2O) of 15%, Sulfur (S) 10%, and a maximum water content of 3%. This fertilizer is in solid, granular form with a grain size of 70% US Mesh -4 + 10. This compound fertilizer is almost completely soluble in water, so that the nutrients it contains can be immediately absorbed and used by plants effectively. The application of Phonska fertilizer to rice plants has a very significant effect on vegetative growth (plant height and number of rice grains per clump) and generative (number of panicles and production). The process of making NPK Phonska IV fertilizer generally consists of several process stages, namely preparation of raw materials, preparation of slurry, granulation process, drying, screening, cooling, and coating. The main tools used in the process of making Phonska IV fertilizer are pre-neutralizer and granulator. In the Pre-Neutralizer, two reactions occur, namely the reaction between ammonia and sulfuric acid to form ammonium sulfate (ZA) and the reaction between ammonia and phosphoric acid to form monoammonium phosphate (MAP). The reaction that occurs is a neutralization reaction and is exothermic. In the granulator, further reactions occur, namely the reaction between ammonia and sulfuric acid to form ammonium sulfate (ZA) and the reaction between ammonia and monoammonium phosphate (MAP) to form diammonium phosphate (DAP). In the Phonska IV fertilizer product, coating is carried out because the hygroscopic nature of the raw material can accelerate the caking process, especially if there are variations in air temperature and water content. The coating agent is made of silica powder or dolomite and coating oil, to increase anticaking properties, one of the coating agents is added with a termination compound so that it can provide extra resistance to water absorption. In this coating, the addition of a coating agent aims to increase the Critical Relative Humidity (CRH) value of the product to be the same as the environmental CRH, so that the resulting product has reduced hygroscopic properties. Keywords: Granulation, NPK Phonska IV, Pre-Neutralizer, Petrokimia Gresik
| Item Type: | Monograph (Project Report (Praktek Kerja Lapang)) |
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| Subjects: | Q Science > Q Science (General) Q Science > QD Chemistry |
| Divisions: | Faculty of Engineering > Departement of Chemical Engineering |
| Depositing User: | Lutfia Rima Safira |
| Date Deposited: | 23 Jun 2025 03:49 |
| Last Modified: | 23 Jun 2025 03:49 |
| URI: | https://repository.upnjatim.ac.id/id/eprint/38978 |
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