Faizatin, Rina Yuliana Nur and Disty, Vinora Chyntia (2025) Desain Pabrik Precipitated Calcium Carbonate (PCC) Berbasis Pemanfaatan Steel Slag dan CO₂ dari Blast Furnace Gas (BFG) Pabrik Baja. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Precipitated Calcium Carbonate (PCC) merupakan bahan penting dalam industri kertas sebagai filler dan pigmen pelapis. Kebutuhan PCC di Indonesia terus meningkat, sementara pasokan dalam negeri masih terbatas, sehingga impor masih diperlukan. Tugas akhir ini bertujuan merancang pra-desain pabrik PCC berbasis pemanfaatan limbah industri baja, yaitu steel slag dan CO₂ dari Blast Furnace Gas (BFG), sebagai upaya mendukung ekonomi sirkular dan mengurangi ketergantungan impor. Proses produksi yang dipilih adalah metode Sky-Cycle, karena mampu menghasilkan PCC berkualitas tinggi dengan morfologi kristal skalenohedral yang unggul untuk industri kertas. Proses ini melibatkan reaksi antara larutan Mg(OH)₂ dan CO₂ untuk membentuk Mg(HCO₃)₂, yang kemudian direaksikan dengan CaCl₂ hasil leaching steel slag menggunakan HCl. Pemilihan HCl didasarkan pada efisiensi ekstraksi CaO yang tinggi dan kemampuannya untuk diregenerasi. Pabrik dirancang dengan kapasitas produksi 2.100 ton/tahun dan berlokasi di Kawasan Industri Krakatau, Cilegon, karena dekat dengan sumber bahan baku dari PT Krakatau Posco. Berdasarkan evaluasi ekonomi, pabrik ini menunjukkan kelayakan investasi dengan nilai Internal Rate of Return sebesar 8,8%. Jangka waktu pengendalian modal (Pay Out Time) sebesar 12,76 tahun. Dari aspek lingkungan, proses ini berpotensi mengurangi emisi CO₂ dan limbah padat slag, sekaligus memberikan nilai tambah dari limbah industri.
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recipitated Calcium Carbonate (PCC) is widely used as a filler and coating pigment in the paper industry. The demand for PCC in Indonesia continues to increase, while domestic supply remains limited, making imports still necessary. This final project aims to develop a pre-design for a PCC plant utilizing steel slag and carbon dioxide (CO₂) from blast furnace gas (BFG) as an effort to support a circular economy and reduce import dependence. The chosen production process is the Sky-Cycle method, which can produce high-quality PCC with scalenohedral crystal morphology, making it ideal for paper applications. This process involves a reaction between Mg(OH)₂ solution and CO₂ to form Mg(HCO₃)₂, which is then reacted with CaCl₂ obtained from steel slag leaching using HCl. Hydrochloric acid was selected due to its high CaO extraction efficiency and regenerability. The plant is designed with a production capacity of 2,100 tons/year and is planned to be located in the Krakatau Industrial Estate, Cilegon, due to its proximity to raw material sources from PT Krakatau Posco. Based on the economic evaluation, the project is considered feasible with an Internal Rate of Return (IRR) of 8.8% and a Pay Out Time (POT) of 12.76 years. From an environmental perspective, the process has the potential to reduce CO₂ emissions and solid slag waste, while simultaneously adding value to industrial by-products.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Blast furnace gas (BFG), Precipitated Calcium Carbonate (PCC), Steel slag,Blast Furnace Gas (BFG), Precipitated Calcium Carbonate (PCC), Steel Slag |
| Subjects: | T Technology > T Technology (General) T Technology > TP Chemical technology T Technology > TP Chemical technology > TP155.5 Chemical plants--Design and construction T Technology > TP Chemical technology > TP245.C3 Calcium carbonate. |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Chemical Engineering > 24201-(S1) Undergraduate Thesis |
| Depositing User: | Rina Yuliana Nur Faizatin |
| Date Deposited: | 24 Jul 2025 06:33 |
| Last Modified: | 24 Jul 2025 06:33 |
| URI: | http://repository.its.ac.id/id/eprint/121089 |
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