Submerged Arc Furnace

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Submerged Arc Furnace

Submerged Arc Furnace Profile
Submerged arc furnace—it’s also known as electric arc furnace or resistance electric furnace. It is mainly used to reducing smelting ore, carbonaceous reducing agent and solvent etc. Mainly adapts to production of ferrosilicon, ferromanganese, ferrochrome, ferrotungsten, silicon manganese alloy and other ferrous alloys, it is an important smelting furnace in metallurgical industry for production of industrial raw materials and calcium carbide and so on chemical raw materials. The working character is to use carbon or magnesia refractory materials as furnace lining, use self roasting electrode. Electrode inserts into the materials inside the furnace for submerged arc operation, using arc energy and current through the materials, and due to the resistance of the materials and produce energy to melt metal. It’s a kind of industrial furnace which is worked continuously, charged material in succession, and tapped out metal or slag in intermittent.

Submerged Arc Furnace---Major categories and application

Category

Main raw-material

Final products

Reaction
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

Ferrotungsten 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

 



Notes: The above is roughly value. According to the difference of the raw material composition, finished product components, electric furnace capacity and etc. the power consumption value will be much different.

Submerged Arc Furnace---Structure characteristics
Submerged arc furnace is a kind of industrial furnace which consumes much power. Full set equipment mainly consists of furnace shell, fume hoods, lining, short net, cooling system, exhaust system, de-dusting system, electrode shell, electrode lifting system, loading and unloading system, electrode holder, arc burner, hydraulic systems, submerged arc furnace transformer and various of electrical equipments.

Submerged arc furnace equipment is divided into three layer arrangement
The 1st layer is furnace body (including furnace bottom support, furnace shell, furnace lining), tapping system (including the ladle and ladle car.), arc burner etc.

The 2nd layer


1、Fume hood: At present, mostly of submerged arc furnace adopts closed or semi-closed low hood structure, with the characteristics of environmental protection, facilitate maintenance and improve the operation environment. The closed structure can also collect the exhaust gas (main ingredient is carbon monoxide) which is generated in the production and used in synthetically. Also can reduce the heat loss of the circuit, decrease the temperature of the electrode, and improve the operating environment.

2、Electrode holder: Most of submerged arc furnace with three-phase power supply. Electrode in triangle or inverted triangle, symmetrical position placed in the middle of furnace chamber. Large submerged arc furnace generally adopts anthracite, coke and coal tar pitch mixed as electrode material, in the process of smelting , it roasting by itself as electrode.

3、Short net

4、Copper tile

5、Electrode shell

6、Unloading system

7、Stoking machine

8、Fume exhaust system

9、Water-cooling system

10、Submerged arc furnace transformer

11、Operating system


The 3rd layer


1、Hydraulic system

2、Electrode press and release device

3、Electrode lifting system

4、Steel platform

5、Hopper and cycle material distribution car

Other additional: skew Bridge feeding system, electronic batching system, etc.


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Q:What is the difference between industrial furnace masonry and ordinary masonry?
Furnace industry is not generally Mason walls, needs to have a professional operation and rich construction experience, high level of industrial furnace is difficult to get.
Q:Heat treatment equipment (industrial furnace), which products generally contain what kind of, which industries need to use heat treatment industrial furnace equipment.
Heat treatment furnace is mainly for the mechanical processing and casting industry workpiece annealing, quenching, carburizing, quenching and tempering, heat treatment equipment.
Q:What's the role of anchor bricks in industrial furnaces?
These layers need to be joined and anchored. Anchor brick is this role. The heat insulation layer at the horizontal section of the flue is mostly a narrow cavity.
Q:What are the companies in the world that are currently engaged in metallurgical furnaces?
Basically, no industrial furnace manufacturer can do all types of stoves.Often associated with the industry is very large,so your ranking is basically meaningless.
Q:What is the difference in structure between industrial furnace and boiler?
At the same time, the working environment is relatively poor, the structure should be sturdy and durable, the transfer mechanism (generally) to stable and durable low failure rate, the insulation layer must be thick enough and the economy, the steel structure housing materials used to be enough.
Q:What is the difference between industrial furnaces and boilers?
Industrial kilns and industrial furnaces are collectively referred to as industrial furnaces. Industrial furnaces mainly refer to devices that heat materials by combustion reactions.
Q:Why does the burner of industrial furnace burn occasionally?
The basic structure of the complete ignition system is the ignition device and flameout protection device. The ignition burner includes an ignition electrode and an igniter (equipped with some external type transformer, voltage transformer) through the above 10kV, the ignition electrode spark ignition of high voltage discharge to ignite gas column.
Q:What is an industrial furnace pit?
The creation and development of industrial kilns play an important role in the progress of mankind. Chinese appeared more perfect in the Shang Dynasty copper smelting furnace, furnace temperature is up to 1200 DEG C, up to 0.8 meters in diameter kiln stove.
Q:How to use industrial furnace equipment?
The protection device of the exposed transmission department shall be installed with the correct installation position. The structure is reasonable. The wire rope pulley of the furnace car shall be intact and undamaged. All the pulleys and sprockets on the furnace are in good condition, without defects and flexible in rolling.
Q:Selection of heat preservation material for industrial furnace
Micro nano heat insulation board.The thermal conductivity of micro nano heat insulation board is very low, only a fraction of the traditional thermal insulation material, and the insulation effect is very efficient.

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