Reduksi Langsung Bijih Nikel Laterit Limonitik dengan Variasi Rasio Batu Bara dan Dolomit pada Reaktor Bed Batu Bara-Dolomit

Purnamasari, Anisya (2018) Reduksi Langsung Bijih Nikel Laterit Limonitik dengan Variasi Rasio Batu Bara dan Dolomit pada Reaktor Bed Batu Bara-Dolomit. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Cadangan nikel sulfida yang terus menipis menyebabkan pengembangan pengolahan pada jenis laterit diperlukan guna memenuhi kebutuhan. Pengolahan nikel laterit menggunakan gas CO sebagai pereduktor pada reduksi langsung terbukti efektif. Penelitian ini dilakukan dengan mereduksi bijih nikel laterit limonitik dengan kadar Ni 1,25%. Adapun pembuatan briket dengan campuran bijih nikel laterit limonitik, batu bara, Na2SO4 dan tepung tapioka yang nantinya dimasukkan ke dalam crucible bed bersama dengan penambahan batu bara dan dolomit (di luar briket) yang kemudian direduksi pada temperatur 1400oC dengan variasi rasio batu bara dan dolomit 1,19; 1,48 dan 2,09. Pengujian EDX, XRD dan SEM dilakukan untuk mengetahui kadar Ni dan Fe hasil reduksi, fasa-fasa yang terbentuk dan morfologi pada hasil proses reduksi. Dari hasil reduksi didapatkan peningkatan kadar Ni tertinggi didapat dengan rasio 1,48 dengan peningkatan sebesar 11,49%, serta recovery Ni tertinggi diperoleh rasio 2,09 sebesar 99,10%. Sedangkan, peningkatan kadar Fe tertinggi sebesar 13,29% dari rasio 1,48 dan recovery Fe paling tinggi didapat dengan rasio 2,09 sebesar 14,24%.
==============================================================================================
Nickel sulfide reserves which keeps thinning
causes the
development of processing on this type o
f laterite
required
to meet
needs
. Nickel laterite processing using gas CO as
reducing agent
in the direct
reduction proved effective. This research was
conducted with the reduct
ion of nickel laterite l
imoniti
c
ore
s with
1.25% Ni. As for
making briquettes with a mixed nickel laterite
limonitic
, coal, Na
2
SO
4
and tapioca flour which was later
incorporated into the crucible bed
along with the addition of coal
and dolomites (outside of briquettes) which is then reduced at
temperatures 1400
o
C with variation rat
io of coal and dolomite
1,1
9
; 1,48
and 2,09. EDX test
, XRD test and
SEM test
is carried
out to find out the
grade
of Ni and Fe reduction results, phases
that are formed and morphology on the results of the process of
reduction
. From the results obtain
ed by the reduction of elevated
grades
of the hig
h
est
Ni
with
ratio
1,48
with an increase of
11
,
49%, as well as the recovery of Ni hig
h
est ratio
2
,
09
with
result 99
,
10%.
Meanwhile, increased
grades
of Fe hig
h
est o
f
13,29%
from the ratio 1,4
8
and
recovery Fe hig
h
est gained with
ratio 2,09
by
14,24
%
.

Item Type:	Thesis (Undergraduate)
Additional Information:	RSMt 620.188 Pur r-1 3100018074235
Uncontrolled Keywords:	Nikel laterit limonitik, Reduksi langsung, Rasio batu bara/Dolomit, Kadar CO/CO2, Direct Reduction, Ratio of Coal/Dolomite
Subjects:	T Technology > TN Mining engineering. Metallurgy
Divisions:	Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User:	Purnamasari Anisya
Date Deposited:	05 Feb 2018 02:52
Last Modified:	29 Jul 2025 03:43
URI:	http://repository.its.ac.id/id/eprint/49269

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