Masyahid, Habli (2019) Analisa Pengaruh Rasio Massa Limestone dan Dolomit Terhadap Kadar Ni, Kekuatan dan Perolehan Sinter Pada Proses Sintering Bijih Nikel Laterit. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Ketersediaan cadangan bijih nikel laterit yang berlimpah di Indonesia belum mampu dimanfaatkan secara maksimal untuk memenuhi permintaan nikel yang terus meningkat. Untuk menjajaki kemungkinan penggunaan bijih nikel laterit tersebut, saat ini sedang dikembangkan satu proses alternatif yakni sintering-blast furnace yang akan menghasilkan feronikel. Proses blast furnace yang optimal membutuhkan produk sinter yang berkualitas. Salah satu faktor yang mempengaruhi kualitas produk sinter adalah penggunaan fluks. Penelitian sintering bijih nikel laterit ini dilakukan dengan menggunakan fluks limestone dan dolomit serta bahan bakar arang. Dilakukan perhitungan kebutuhan arang dan limestone menggunakan neraca panas dan neraca massa, kemudian ditambahkan massa limestone dan dolomit pada rasio: 100% limestone tanpa dolomit, 75% limestone 25% dolomit, 50% limestone 50% dolomit, 25% limestone 75% dolomit, serta 100% dolomit dan tanpa limestone pada feed material. Feed material dimasukkan dalam furnace, lalu dipanaskan hingga temperatur 1200oC dengan waktu sintering selama 4 jam. Selanjutnya dilakukan perhitungan perolehan sinter dan pengujian EDX, XRD serta Drop Test untuk mengetahui kadar Ni, senyawa dalam sinter dan kekuatan sinter. Dari pengujian tersebut dapat diketahui penggunaan rasio limestone dan dolomit yang optimal dalam proses sintering. Kadar Ni tertinggi didapatkan pada penggunaan 100% limestone yakni sebesar 2,5%. Kekuatan dan perolehan sinter tertinggi juga pada penggunaan 100% limestone yakni sebesar 68,85% dan 86,44%.
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The availability of abundant laterite nickel ore reserves in Indonesia has not been able to be fully utilized to meet the increasing demand for nickel. To explore the possibility of using laterite nickel ore, an alternative process is being developed, the namely sintering-blast furnace which will produce ferronickel. The optimal blast furnace process requires good quality sintered products. One of the factors that influence the quality of sintered products is the use of flux. The research on the sintering of laterite nickel ore was carried out using limestone and dolomite flux and charcoal fuel. Calculations of charcoal and limestone requirements are carried out using a heat balance and mass balance, then the limestone and dolomite are added on ratio: 100% limestone without dolomite, 75% limestone 25% dolomite, 50% limestone 50% dolomite, 25% limestone 75% dolomite, and 100% dolomite without limestone in the feed material. Feed material is inserted in the furnace, then heated to a temperature of 1200oC with the sintering time for 4 hours. Then the calculation of the sintering and testing of EDX, XRD and Drop test was performed to determine the content of Ni, compounds in sinter product, and sintered strength. From these tests, the optimal use of limestone and dolomite ratios in the sintering process can be obtained. The highest Ni content is obtained at the use of 100% limestone which is equal to 2.5%. The highest strength and acquisition of sintered is also the use of 100% limestone which is equal to 68.85% and 86.44%.
| Item Type: | Thesis (Other) |
|---|---|
| Additional Information: | RSMt 671.373 Mas a-1 2019 |
| Uncontrolled Keywords: | Sintering, Laterite Nickel, Limestone, Dolomite, Ni Grade, Sinter Strength, Sinter Yield. |
| Subjects: | T Technology > TN Mining engineering. Metallurgy > TN677 Blast furnaces. |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | Habli Masyahid |
| Date Deposited: | 03 Dec 2024 03:40 |
| Last Modified: | 03 Dec 2024 03:40 |
| URI: | http://repository.its.ac.id/id/eprint/65422 |
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