raw materials requirement for tunnel kiln DRI
|
|||||
Concentrated iron
|
TFe
|
SiO2+Al2O3
|
CaO
|
MgO
|
matrix
|
≥66.5%
|
≤5.5%
|
≤2.5%
|
≤1.5%
|
≤8%
|
|
S
|
P
|
wet
|
|
|
|
≤0.06%
|
≤0.06%
|
≤10%
|
|
|
|
anthracite
|
fixed carbon
|
volatile
|
ash
|
S
|
ash melting temperature
|
≥60%
|
≤10%
|
<25%
|
<1.0%
|
≥1250℃
|
|
水分
|
limestone
|
CaO
|
|
|
|
<15%
|
≥50%
|
|
|
||
coal for gas stove
|
weak sticking
|
size
|
30-50mm
|
powder
|
≤5%
|
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