Dewi Arifilla, Tiffanie (2025) Pra Rancangan Pabrik Aluminium Hidroksida dari Bauxite dan Natrium Hidroksida dengan Proses Double Digesting Kapasitas 70.000 Ton/Tahun. Undergraduate thesis, UPN Veteran Jawa Timur.
![[img]](https://repository.upnjatim.ac.id/style/images/fileicons/text.png) |
Text (Cover)
20031010104.-cover.pdf Download (870kB) |
|
Text (Bab 1)
20031010104.-bab1.pdf Download (395kB) |
|
Text (Bab 2)
20031010104.-bab2.pdf Download (373kB) |
|
Text (Bab 3)
20031010104.-bab3.pdf Restricted to Repository staff only until 5 December 2028. Download (350kB) |
|
Text (Bab 4)
20031010104.-bab4.pdf Restricted to Repository staff only until 5 December 2028. Download (335kB) |
|
Text (Bab 5)
20031010104.-bab5.pdf Restricted to Repository staff only until 5 December 2028. Download (393kB) |
|
Text (Bab 6)
20031010104.-bab6.pdf Restricted to Repository staff only until 5 December 2028. Download (168kB) |
|
Text (Bab 7)
20031010104.-bab7.pdf Restricted to Repository staff only until 5 December 2028. Download (924kB) |
|
Text (Bab 8)
20031010104.-bab8.pdf Restricted to Repository staff only until 5 December 2028. Download (436kB) |
|
Text (Bab 9)
20031010104.-bab9.pdf Restricted to Repository staff only until 5 December 2028. Download (301kB) |
|
Text (Bab 10)
20031010104.-bab10.pdf Restricted to Repository staff only until 5 December 2028. Download (699kB) |
|
Text (Bab 11)
20031010104.-bab11.pdf Restricted to Repository staff only until 5 December 2028. Download (168kB) |
|
Text (Daftar pustaka)
20031010104.-daftarpustaka.pdf Download (201kB) |
|
Text (Appendix (Lampiran))
20031010104.-lampiran.pdf Restricted to Repository staff only until 5 December 2028. Download (1MB) |
|
Text (Flowsheet)
20031010104.-flowsheet.pdf Download (446kB) |
Abstract
This plant is designed to produce 70,000 tons per year of aluminum hydroxide using bauxite and sodium hydroxide as raw materials through the double-digesting Bayer-based process. The facility will be located in the Ketapang Industrial Estate (Kawasan Industri Ketapang, KIK) on Jl. Mekar Utama, Kendawangan District, Ketapang Regency, West Kalimantan. The site selection is based on strategic factors that support production efficiency and reliability, including proximity to key raw material suppliers. The plant is planned to operate in affiliation with PT Well Harvest Winning Alumina Refinery as the bauxite supplier and PT Pakerin as the sodium hydroxide supplier. The process begins with the preparation of the main raw materials. Bauxite with an Al₂O₃·3H₂O content of 61.8% is stored in the Bauxite Warehouse (F-110), while 48% NaOH from PT Pakerin is stored in Tank F-130 at 30°C and 1 atm. Prior to digestion, bauxite is mixed with spent liquor— the filtrate obtained from the centrifugation stage— in Mixing Tank 1 (M-120) to enhance dissolution efficiency. Meanwhile, NaOH is diluted to 18% in Mixing Tank 2 (M-140) to obtain the optimum concentration for digestion. The digestion stage consists of two reactors. In Digester 1 (R-210), the bauxite slurry reacts with dilute NaOH at 100°C and 1 atm for 2 hours, forming sodium aluminate (NaAlO₂). The product is then heated to 200°C in Heater 2 (E-212) before entering Digester 2 (R-220), where the reaction continues for 1 hour to dissolve remaining alumina. This stage generates red mud, consisting of insoluble iron, silica, titania, and residual alumina. In the separation stage, red mud is removed from the sodium aluminate liquor using a Clarifier (H-230). The underflow containing red mud (pH 11–12) is discharged to a holding tank, while the clarified sodium aluminate overflow is cooled to 90°C in Cooler 1 (E-233) prior to precipitation. The precipitation stage takes place in the Precipitation Tank (R-240) at 90°C and 1 atm for 1 hour, where sodium aluminate reacts with water to form aluminum hydroxide crystals and regenerates NaOH. The filtrate produced is reused as spent liquor in the bauxite dissolution step. In the finishing stage, aluminum hydroxide solids are separated from the slurry using a Rotary Drum Vacuum Filter (H-310) and a Centrifuge (H-320). The spent liquor is cooled in Cooler 2 (E-322) and returned to Mixing Tank 1. The filter cake is dried in a Rotary Dryer (B-330) at 140°C, and fine particles entrained in the exhaust gas are recovered in a Cyclone (H-334). The dried product is cooled to 30°C in a Cooling Screw Conveyor (E-335), milled to 150 mesh in a Ball Mill (C-340), temporarily stored in Bin F-341, and finally packaged in 50-kg bags (P-342) before being transferred to the Product Warehouse (F-350).
| Item Type: | Thesis (Undergraduate) | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Contributors: |
|
||||||||
| Subjects: | T Technology > TP Chemical technology > TP155 Chemical engineering | ||||||||
| Divisions: | Faculty of Engineering > Departement of Chemical Engineering | ||||||||
| Depositing User: | TIFFANIE DEWI ARIFILLA | ||||||||
| Date Deposited: | 05 Dec 2025 09:15 | ||||||||
| Last Modified: | 05 Dec 2025 09:15 | ||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/47947 |
Actions (login required)
 |
View Item |