Analisa Pengaruh Variasi Tebal Bed terhadap Kadar Ni, Kekuatan Sinter, dan Perolehan Sinter pada Proses SIntering Bijih Nikel Laterit

Putra, Galih Dwiyan (2019) Analisa Pengaruh Variasi Tebal Bed terhadap Kadar Ni, Kekuatan Sinter, dan Perolehan Sinter pada Proses SIntering Bijih Nikel Laterit. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Nikel banyak digunakan dalam pembuatan stainless steel. Salah satu proses untuk mendapatkan nikel dari bijih nikel yaitu dengan menggunakan metode pirometalurgi. Salah satu proses dari pirometalurgi adalah blast furnace. Untuk meningkatkan optimalisasi kerja blast furnace maka proses sintering diperlukan. Proses sintering adalah proses aglomerasi dari campuran bijih, fluks, serta bahan bakar yang hasil dari proses tersebut menjadi umpan di proses blast furnace. Sebelum diumpankan, hasil dari proses sintering harus memiliki kekuatan sinter dan perolehan sinter yang sesuai standar. Faktor yang mempengaruhi kekuatan sinter dan perolehan sinter salah satunya adalah tebal bed. Hal utama dalam proses sintering adalah kalor panas yang terjadi pada bed. Maka, dilakukan penelitian tebal bed pada variasi 15 cm, 20 cm, dan 25 cm. Penelitian ini dilakukan dengan sintering bijih nikel laterit, arang, dan fluks. Sebelum melakukan penelitian perlu menghitung neraca massa dan neraca panas untuk mengetahui kebutuhan pemakaian arang dan fluks pada proses sintering tersebut. Feed material yang digunakan menyesuaikan dengan tebal bed yang divariasikan. Feed material dipanaskan hingga temperatur 1200o C selama 4 jam. Selanjutnya, dilakukan perhitungan perolehan sinter dan pengujian EDX, XRD serta Drop test untuk mengetahui kadar Ni, senyawa sinter, dan kekuatan sinter. Kadar Ni tertinggi didapatkan pada tebal bed 25 cm yakni sebesar 3,28%. Kekuatan sinter tertinggi didapatkan pada variasi tebal bed 15 cm sebesar 72,30%. Perolehan sinter tertinggi didapatkan pada variasi tebal bed 20 cm yakni sebesar 67,95%. Fasa dominan dari semua variasi tebal bed adalah diopside. Dilihat dari segi kadar Ni, kekuatan dan perolehan sinter, maka variasi tebal bed yang optimal adalah variasi tebal bed 20 cm.
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Nickel is widely used in the stainless-steel manufacturing. One of the techniques to obtain nickel from nickel ore is pyrometallurgical method. One of the processes in pirometallurgy is blast furnace. To improve the optimization of blast furnace work, sintering process is needed. Sintering process is the agglomeration of ores, fluxes, and fuels mixture which the results of the process is fed to blast furnace. Before being fed, the results of the sintering process must have certain sinter strength and sinter yield according to the standard. One of the factors that has effect on the sinter strength and sinter yield is bed thickness. The main factor in the sintering process is the heat that occurs in the bed. Thus, a bed thickness study is carried out with variations of 15 cm, 20 cm, and 25 cm. This research is carried out by sintering laterite nickel ore, charcoal, and flux. Before conducting research, calculation of mass balance and heat balance is necessary to determine the amount of charcoal and flux that will be used in the sintering process. Feed material that is being used adjusts to the variety of bed thickness. Feed material is heated to temperature of 1200o C for 4 hours. Afterwards, the calculation of sinter yield and a series of testing consists of EDX, XRD and Drop Test is carried out to determine Ni content, sinter compounds, and sinter strength. The highest Ni content of 3,28% is found in the bed thickness variation of 25 cm. The highest sinter strength is found in bed thickness variation of 15 cm with shatter index obtained at 72.44%. The highest sinter yield is found in the bed thickness variation of 20 cm with the obtained sinter yield of 67.95%. The dominant phase of all bed thickness variations is diopside. In terms of Ni content, sinter strength and sinter yield, the optimal variation in bed thickness is the variation of 20 cm bed thickness.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Kekuatan Sinter, Nikel Laterit, Perolehan Sinter, Sintering, Tebal Bed.
Subjects:	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:	Galih Dwiyan Putra
Date Deposited:	22 Jul 2026 06:07
Last Modified:	22 Jul 2026 06:07
URI:	http://repository.its.ac.id/id/eprint/65396

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