LOW CARBON FERROCHROME FURNACE

The main raw materials for smelting low-carbon ferrochromium using the electro
silicothermic method include chromium ore, silicon chromium alloy, and lime.
Some also come with fluorite and iron scales.

Chromium ore should be a dry, clean lump or concentrate with a lump size of
less than 50mm; Containing Cr2O3>40%, Cr2O3/ Σ FeO>2.0, phosphorus content
should not exceed 0.03%. Select silicon chromium alloys with different carbon
contents based on the grade of the micro carbon engraved iron smelted. When
smelting low-carbon iron with a carbon content of 0.06%, the carbon content of
silicon chromium alloy should be less than 0.06%; When smelting submerged arc
furnace for ferrochrome production with a carbon content of 0.03%, the carbon
content of the silicon chromium alloy should be less than 0.03%. Silicon
chromium alloy shall not contain slag, and the block size shall not exceed
15mm. Fragments less than 1mm shall be sieved out. Lime requires a CaO content
greater than 88% and a phosphorus content less than 0.02%. Newly burned lime
with a block size of 10-50mm should be used.

FEATURES
CHNZBTECH TECHNOLOGY FOR A MATURE 4000KVA FURNACE
CHNZBTECH Technology for a Mature 4000KVA Furnace
Productivity：35t/day;

Cooling water consumption: 150m³ / h, cooling water can be recycled,

Secondary current: 10500A,

4000KVA LCFC furnace fume amount: 90000m³/h, bag filter recommended;

HP electrode 400mm, consumption of each ton of alloy electrode is 16-18 kg.

Ton products raw material chrome ore 1.35t, siliconchrome 0.56t, lime 1.20t

Power consumption：2200-2800KW.H/t, depends on melting process;

SPECIFICATIONS
LOW CARBON FERROCHROME FURNACE SPECIFICATIONS
Grades and ingredients of some products in China
C Grade Chemical %
Cr C Si P S
Range Ⅰ Ⅱ Ⅰ Ⅱ Ⅰ Ⅱ
Ⅰ Ⅱ
≥ ≤
micro FeCr65 C0.03 63.0～75.0 0.03 1.0
0.03 0.025
FeCr55 C0.03 60.0 52.0 0.03 1.5 2.0 0.03
0.04 0.03
FeCr65 C0.06 63.0～75.0 0.06 1.0
0.03 0.025
FeCr55 C0.06 60.0 52.0 0.06 1.5 2.0 0.04
0.06 0.03
FeCr65 C0.1 63.0～75.0 0.10 1.0
0.03 0.025
FeCr55 C0.1 60.0 52.0 0.10 1.5 2.0 0.04
0.06 0.03
FeCr65 C0.15 63.0～75.0 0.15 1.0
0.03 0.025
FeCr55 C0.15 60.0 52.0 0.15 1.5 2.0 0.04
0.06 0.03

Low FeCr65 C0.25 63.0～75.0 0.25 1.5
0.03 0.025
FeCr55 C0.25 60.0 52.0 0.25 2.0 3.0 0.04
0.06 0.03 0.05
FeCr65 C0.5 63.0～75.0 0.5 1.5
0.03 0.025
FeCr55 C0.5 60.0 52.0 0.5 2.0 3.0 0.04
0.06 0.03 0.05

4000KVA Furnace for LCFC furnace
No. Item Unit Data Remark
1 TR capacity KVA 4000 3phase
Power factor Cos ≮0.9
2 End products LCFC Low, micro
3 TPD t 35
4 Tapping time d 10
5 Max tapping t 3.5
6 Electrode Graphite HP
7 Electrode diameter mm 400
8 Water M³/h 150 Circulation water

For more information about low carbon ferro chrome manufacturing process and
low carbon ferrochrome production, please feel free to contact us!

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