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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