a. Menghitung Panas Masuk
SiO
2
: Qi
SiO2
= N
19 SiO2
.
303 298
2
dT Cp
SiO
= 56,8640 kmoljam. 1840,5824 Jmol = 104.662,8578 kJjam
C : Qi
C
= N
19 C
.
303 298
dT Cp
C
= 171,1204 kmoljam. 529,4370 Jmol = 90.597,4426 kJmol
FePO
4
: Qi
FePO4
= N
19 FePO4
.
303 298
4
dT Cp
FePO
= 0,3785 kmoljam. 474,5705 Jmol = 179,6469 kJjam
Na
2
O : Qi
Na2O
= N
19 Na2O
.
303 298
2
dT Cp
O Na
= 1,0595 kmoljam. 346,4530 Jmol = 367,0758 kJjam
H
2
O : Qi
H2O
= N
H2O
.
303 298
2
dT Cp
O H
= 6,3453 kmoljam. 374,6878 kJmol = 2.377,4888 kJjam
b. Menghitung Panas Keluar
SiO
2
: Qo
SiO2
= N
20 SiO2
.
313 298
2
dT Cp
SiO
= 56,8640 kmoljam. 2.301,5507 Jmol = 130.875,3542 kJjam
C : Qo
C
= N
20 C
.
313 298
dT Cp
C
= 171,1204 kmoljam. 621,9829 Jmol = 106.433,9294 kJmol
UNIVERSITAS SUMATERA UTARA
FePO
4
: Qo
FePO4
= N
20 FePO4
.
313 298
4
dT Cp
FePO
= 0,3785 kmoljam. 1.461,4185 Jmol = 553,6239 kJjam
Na
2
O : Qo
Na2O
= N
20 Na2O
.
313 298
2
dT Cp
O Na
= 1,0595 kmoljam. 1.050,3585 Jmol = 1.112,5017 kJjam
H
2
O : Qo
H2O
= N
20 H2O
.
313 298
2
dT Cp
O H
= 6,3453 kmoljam. 1.125,7408 kJmol = 7.143,1090 kJjam
Tabel B.5 Neraca Energi pada Pelletizing Machine L-102
Komponen Masuk kJ
Keluar kJ
SiO
2
104.662,8578 130.875,3542
C 90.597,4426
106.433,9294 Na
2
O 367,0758
1.112,5017 FePO
4
179,6469 553,6239
H
2
O 2.377,4888
7.143,1090 Jumlah
198.184,5119 246.118,5182
∆Hr -
- Q
47.934,0063 -
Total 246.118,5182
246.118,5182
UNIVERSITAS SUMATERA UTARA
B.2.2 Bucket Elevator C-110
Fungsi: Mengangkut bahan baku dari pelletizing machine ke rotary kiln pre-heater. Asumsi terjadi penurunan suhu bahan menjadi 35
C, selama pengangkutan.
20 21
40
o
C, 1 atm 35
o
C, 1 atm
SiO
2
C FePO
4
10Na
2
O.30SiO
2
.60H
2
O SiO
2
C FePO
4
10Na
2
O.30SiO
2
.60H
2
O H
2
O H
2
O
a. Menghitung Panas Masuk
Panas masuk bucket elevator sama dengan panas keluar pelletizing machine pada alur 20, yaitu = 246.118,5182 kJjam.
b. Menghitung Panas Keluar
SiO
2
: Qo
SiO2
= N
21 SiO2
.
308 298
2
dT Cp
SiO
= 56,8640 kmoljam. 2.069,7463 kJmol = 117.694,0320 kJjam
C : Qo
C
= N
21 C
.
308 298
2
dT Cp
SiO
= 171,1204 kmoljam. 575,1541 Jmol = 98.420,5688 kJmol
FePO
4
: Qo
FePO4
= N
21 FePO4
.
308 298
2
dT Cp
SiO
= 0,3785 kmoljam. 961,7110 Jmol = 364,0521 kJjam
Na
2
O : Qo
Na2O
= N
21 Na2O
.
308 298
2
dT Cp
SiO
= 1,0595 kmoljam. 696,5830 Jmol = 738,0474 kJjam
UNIVERSITAS SUMATERA UTARA
H
2
O : Qo
H2O
= N
21 H2O
.
308 298
2
dT Cp
SiO
= 6,3453 kmoljam. 749,9460 Jmol = 4.758,5962 kJjam
Tabel B.6 Neraca Energi pada Bucket Elevator C-110
Komponen Masuk kJjam
Keluar kJjam H
20
H
21
SiO
2
104.662,8578 117.694,0320
C 90.597,4426
98.420,5688 Na
2
O 367,0758
738,0474 FePO
4
179,6469 364,0521
H
2
O 2.377,4888
4.758,5962 Jumlah
198.184,5119 221.975,2965
∆Hr -
- Q
- 24.143,2217
Total 246.118,5182
246.118,5182
UNIVERSITAS SUMATERA UTARA
B.2.3 Burner B-101
Fungsi : Tempat pembakaran gas alam sebagai sumber panas preheater B-102
Udara
E-139
Gas Alam
24
B-101
30
o
C, 2 atm 30
o
C, 2 atm 863
o
C, 1 atm
O
2
N
2
CO
2
H
2
O
FC
CpdT N
CpdT N
C H
r dT
dQ
in s
out s
r 303
298 1135
298
30 .
a. Menghitung Panas Reaksi Pemb akaran Gas Alam ∆Hr
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