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
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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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