Studi Pengaruh Variasi Komposisi Batu Bara Pada Proses Pembriketan Nikel Laterit Terhadap Derajat Reduksi Dan Kekuatan Tekan Pada Mini Blast Furnace

Rasyidi, Muhammad Iqbal (2016) Studi Pengaruh Variasi Komposisi Batu Bara Pada Proses Pembriketan Nikel Laterit Terhadap Derajat Reduksi Dan Kekuatan Tekan Pada Mini Blast Furnace. Undergraduate thesis, Institut Technology Sepuluh Nopember.

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Abstract

Pembriketan bijih nikel laterit dilakukan untuk burden material yang sesuai mini blast furnace. Bahan utama yaitu bijih nikel laterit beserta bahan tambahan berupa batu bara sebagai reduktor, batu kapur, Natrium sulfat dan pengikat kanji dengan komposisi tertentu berdasarkan perhitungan teoritis Kemudian diroasting pada temperatur 1100 °C. Penelitian ini bertujuan untuk menganalisa pengaruh variasi jumlah batu bara terhadap derajat reduksi, kadar unsur dan kekuatan tekan sehingga ditemukan komposisi batu bara yang optimal. Jumlah perhitungan teoritis yaitu perbandingan 7,5 batu bara setiap 100 ore laterit, kemudian divariasikan menjadi 2,5 dan 12,5. Hasil dari proses roasting briket diuji dengan XRD dan XRF untuk mengetahui kadar unsur Fe, Ni, dan senyawa yang terbentuk serta derajat reduksi yang terjadi pada briket. Dan diuji tekan untuk mengetahui kekuatan tekan briket. Dari beberapa variasi yang telah disebutkan, nilai yang optimal terdapat pada variasi jumlah batu bara 12,5 yaitu rasio komposisi ore : batu bara : Na2SO4 : kapur : kanji sebesar 100 : 12,5 : 15,5 : 13 : 4,2, dimana derajat reduksi sebesar 49,9 %, kadar Fe 10,92 % dan Ni 1,863 %. Fasa dalam briket didominasi oleh Spinel (Mg,Ni)(Fe,Al,Cr)2O4 dan Forsterite (Mg,Fe)2SiO4 dengan kekuatan tekan sebesar 72,4905 kgf ======================================================================================================= Lateritic nickel ore briquetting is done to obtain the suitable burden material with mini blast furnace. The main ingredient is nickel laterite ore along with additional materials such as reductant coal, limestone, sodium sulfate and starch as binder with a specific composition is based on theoretical calculations. Then the briquette is roast at a temperature of 1100 °C. This study aimed to analyze the effect of variations in the amount of coal to the degree of reduction, the content of the element and the compressive strength thus found that the optimal composition of the coal. Number of theoretical calculation, namely coal ratio of 7,5 per 100 laterite ore, then varied to 2,5 and 12,5. Results of the roasting process briquettes were tested by XRD and XRF to determine content of the elements Fe, Ni, and compounds formed, and also the degree of reduction that occurs in briquettes. Compressive test are also conducted to determine the compressive strength of the briquettes. From some variations have been mentioned, there is an optimal value on the variation of the ratio of the amount of coal 12,5, that has composition ratio of ore : coal : Na2SO4: lime : kanji is 100 : 12.5 : 16.5 : 13 : 4.2, wherein the degree of reduction of 49.9%, 10.92% Fe content and Ni 1.863%. Phase in the briquettes is dominated by Spinel (Mg,Ni)(Fe,Al,Cr)2O4 and Forsterite (Mg,Fe)2SiO4 with the compressive strength of 72.4905 kgf.

Item Type: Thesis (Undergraduate)
Additional Information: RSMt 669.141 3 Ras s
Uncontrolled Keywords: batu bara; briket, derajat reduksi, kekuatan tekan; laterit
Subjects: Q Science > QD Chemistry > QD63 Extraction
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: Mr. Tondo Indra Nyata
Date Deposited: 10 Mar 2020 02:43
Last Modified: 10 Mar 2020 02:43
URI: http://repository.its.ac.id/id/eprint/75388

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