21mva Submerged Arc Furnace (SAF)

Specifications
1. Submerged Arc Furnace
2. Low power consumtion
3. Resonable price
4. Energy-saving
5. CCC. CE, ISO
1. Product usage
The Submerged Arc Furnace is mainly used for Producing ferroalloy (including ferrotungsten, high carbonferromanganese, high carbon silicon iron, high-carbon Cr, Nickel Iron Alloy) and Silicon, calcium carbide, corundum, Yellow Phosphorous, etc.
2. Main Features:
It can be divided into three kinds according to mode of power supply:
1) AC Submerged Arc Furnace
2) DC Submerged Arc Furnace
3) Low-frequency Submerged Arc Furnace
3. Main Compositions:
Mechanism System:
Furnace Shell
Furnace Cover
Fume exhaust system
Electrode System: Electrode holder, electrode lifting device and electrode clamping/ releasing device
Charging System
Hydraulic System
High Current System
Water-cycling system
Tapping System
Electric system:
Transformer
High-voltage control protection system
Low-voltage control protection system
Computer operating system
Heavy gauge water-cooled cable

Electric arc furnace uses electricity as fuel source and utilizes the arc high temperature produced by electrode and furnace charge to heat and melt the furnace charge. It is widely using in production of normal steel, high quality carbon steel, various alloy steel, stainless, various ferroalloys. It is the key equipment in steel making factories, foundry factories, ferrous alloys making factories and etc.
Characteristic:
1, Smelting temperature is flexible to be controlled, to meet different steel grade production needs.
2, High heat efficiency, atmosphere inside furnace can be controlled.
3, Remove the phosphorus, sulfur, oxygen and other impurities and improve steel quality.
4, Easy to control the chemical composition of steel, stable and high recovery rate of alloys.
5, Equipment is simple and shorter technological process.
Adoption of new technology:
1, Optimization design
2, Tubular water cooled furnace wall and furnace lid
Eccentric bottom tapping (EBT)
Copper-steel combined electrode arm
3, Cluster type large sectional area water cooled cables
Optimize large current system structure (energy-saving type)
Proportional valves hydraulic system
Basic level (PLC) + procedure level ( Industrial control computer) Control system
Frequency control technique

Category			Main raw−material	Final products	Reacyion temperature (Celsius Degree)	Power consumption   kWh/t
Ferroalloy  Furnace	Ferrosilicon        Furnace	(45%)           Ferrosilicon	Ferrosilicon, scrap iron,coke	Ferrosilicon	1550−1770	2100−5500
		(75%)            Ferrosilicon				8000−11000
	Ferromanganese Furnace		Manganese ore,scrap iron,coke,lime	Ferromanganese	1500−1400	2400−4000
	Ferrochrome Furnace		Chrome ore, silica,coke	Ferrochrome	1600−1750	3200−6000
	Ferrotungstem Furnace		Tungsten crystal ore, coke	Ferrotungsten	2400−2900	3000−5000
	Silicon chromium Furnace		Ferrochrome, silica, coke	Silicon chrome	1600−1750	3500−6500
	Silicon manganese Furnace		Manganese ore, silica,iron scrap, coke	Silicon manganese	1350−1400	3500−4000
Steelmaking electric furnace			Iron ore, coke	Pig iron	1500−1600	1800−2500
Calcium carbide furnace			Limestone, coke	Calcium carbide	1900−2000	2900−3200
Boron carbide furnace			Boron oxide, coke	Boron carbide	1800−2500