Riyanto, Aldi Putra (2019) Analisa Pengaruh Rasio Arang dan Batubara terhadap Kadar Ni, Kekuatan, dan Perolehan Sinter pada Proses Sintering Bijih Nikel Laterit. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Nikel adalah unsur paduan utama dari stainless steel, dan mengalami pertumbuhan penggunaan yang sangat cepat seiring dengan peningkatan permintaan stainless steel. Bijih nikel dapat diklasifikasikan menjadi dua jenis yaitu bijih nikel sulfida dan bijih nikel laterit. Namun saat ini ketersediaan bijih nikel sulfida semakin menipis seiiring dengan meningkatnya permintaan stainless steel. Maka dari itu akan sangat bijaksana untuk mengoptimalkan pemanfaatan bijih nikel laterit. Akan tetapi perlu proses pre treatment pada nikel laterit untuk mendapatkan sifat yang sesuai untuk diumpankan ke blast furnace, yaitu dengan dilakukan proses sintering. Penelitian sintering yang dilakukan ini menggunakan bahan bakar arang dan batubara ,dimana dalam penggunannya nanti akan divariasikan rasio antara arang dan batubara. Penggunaan arang lebih ramah lingkungan dari pada batubara oleh karena itu penelitian ini bertujuan untuk mendapatkan rasio bahan bakar arang dan batubara yang optimal untuk proses sintering sehingga sesuai untuk diumpankan ke blast furnace. Laju perubahan rasio batubara dan arang yang digunakan sebesar 0%, 25%, 50%, 75%, dan 100%. Kemudian dilakukan perhitungan perolehan sinter dan pengujian EDX, XRD serta drop test untuk mengetahui kadar nikel, senyawa dalam sinter serta kekuatan sinter. Kadar nikel tertinggi didapatkan oleh variabel kelima yaitu sebesar 2,8%. Kekuatan dan perolehan sinter tertinggi didapatkan oleh variabel kelima juga sebesar 72,21% dan 78,59%.
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Nickel is the main alloying element of stainless steel, and has experienced very fast usage growth along with the increased demand for stainless steel. Nickel ore can be classified into two types, there are nickel sulphide ore and laterite nickel ore. However, currently the availability of nickel sulfide ore is running low as the demand for stainless steel increases. Therefore, it would be wise to optimize the use of laterite nickel ore. But a pre-treatment process for laterite nickel is needed to obtain the appropriate properties to be fed to the blast furnace. The process is namely sintering. The fuel used in the sintering process this time is charcoal and coal, in which the ratio will be varied between the charcoal and coal. The use of charcoal produces less SOx and NOx gas than coal, therefore this study aims to obtain the optimal ratio of charcoal and coal to the sintering process so that it is suitable for feeding into the blast furnace. The rate of change in the ratio of coal and charcoal used is 0%, 25%, 50%, 75%, 100%. To determine the mix sintering needs of the materials used in the sintering process, the mass balance and heat balance are determined first. Then the sintered yield is calculated and the EDX, XRD and Drop tests were tested to determine the content of Ni, phases in sinter product and sintered strength. Sintered strength obtained from variables one to five is 49.24% , 59.98% , 62.95% , 63.52% , dan 72.21%. While the sintered yield is obtained from the first to the fifth variable which is 49.23% , 60.51% , 72.80% , 76.82% ,and 78.59%. The Ni content obtained from the first variable to the fifth variable is 2.5% , 2.52% , 2.63% , 2.68% ,and 2.8%. For compoud contained in sintered products are pyroxene, diopside, hedenbergite, olivine, magnetite, magnesiochromite, nickel iron oxide, quartz.
| Item Type: | Thesis (Other) |
|---|---|
| Additional Information: | RSMt 671.373 Riy a-1 2019 |
| Uncontrolled Keywords: | Sintering, Nikel Laterit, Kekuatan Sinter, Sinter Yield. |
| Subjects: | T Technology > T Technology (General) T Technology > TN Mining engineering. Metallurgy T Technology > TN Mining engineering. Metallurgy > TN677 Blast furnaces. |
| Divisions: | Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | Aldi Putra Riyanto |
| Date Deposited: | 26 Apr 2024 07:13 |
| Last Modified: | 26 Apr 2024 07:13 |
| URI: | http://repository.its.ac.id/id/eprint/65149 |
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