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1.Basic principles
Refining principle: While decarbonizing, the high temperature and
specific slag composition in the furnace are utilized to oxidize
other impurities (such as silicon, phosphorus, etc.) in the
manganese iron and enter the slag, achieving refining of the
manganese iron and improving product quality.
2.Structural composition
Furnace body: Generally constructed with high-quality refractory materials to
withstand high temperatures and erosion from slag. The furnace body
is usually circular or elliptical, with different capacity
specifications, commonly ranging from a few tons to tens of tons.
The furnace shell is generally made of steel plate, which plays a
role in protecting the furnace lining and supporting it.
Electrode system: Usually graphite electrodes or self baking electrodes are used.
The electrode is connected to the power source through a conductive
device, which introduces electrical energy into the furnace and
generates an arc between the electrode and the furnace charge,
providing the high temperature required for smelting. The number,
diameter, and arrangement of electrodes depend on the capacity and
process requirements of the electric furnace, and commonly there
are three electrodes arranged in a triangular shape.
Furnace top device: including feeding port, exhaust port, observation hole, etc. The
feeding port is used to add furnace materials into the furnace, the
exhaust port is used to discharge the waste gas generated during
the smelting process, and the observation hole is convenient for
operators to observe the reaction situation inside the furnace. The
furnace top is also equipped with a sealing device to ensure stable
atmosphere and pressure inside the furnace.
Iron outlet and slag outlet: The iron outlet is located on one side of the bottom of the
furnace and is used to discharge the smelted medium low carbon
manganese iron alloy liquid. The slag outlet is used to discharge
the slag generated during the smelting process, usually located at
a higher position in the furnace body, in order to discharge most
of the slag before tapping.
Electrical system: composed of transformers, control cabinets, conductive busbars,
etc. The transformer converts high-voltage electrical energy into
low-voltage high current suitable for the operation of the electric
furnace. The control cabinet is used to control the input power,
voltage, current and other parameters of the electric furnace, and
adjust them accurately according to the needs of the smelting
process to ensure the stable operation of the electric furnace.
3. Process design features:
(1) Meet the requirements of hot charging and hot mixing production process
(2) Meet the production needs of medium carbon ferromanganese to low and micro carbon ferromanganese and metallic manganese products
(3) Meet the needs of matching with the existing silicon manganese alloy electric furnace
(4) Meet the needs of safety production
(5) The demand for increasing furnace age and reducing refractory material consumption
(6) The demand for reducing product power consumption and increasing recycling rate
(7) The demand for smooth process layout and improved work efficiency
(8) The demand for easy operation, improved labor efficiency, and reduced labor intensity
(9) Reliable operation of equipment reduces the need for investment
4.Shake bag parameters:
Capacity | Weight of molten iron (t) | Eccentri-city (mm) | Shake speed(r/min) | Motor power (kW) |
5m3 | 4-5 | 80-120 | 45-60 | 55 |
8m3 | 6-8 | 80-120 | 45-60 | 75 |
10m3 | 8-10 | 100-140 | 45-60 | 100 |
15m3 | 10-13 | 100-140 | 45-60 | 110 |
20m3 | 16-18 | 100-140 | 45-60 | 200 |
30m3 | 30-35 | 100-140 | 45-60 | 220 |
5. Advantages and Applications
Advantages: Compared with the traditional blast furnace method for producing
low-carbon manganese iron, low-carbon manganese iron furnaces have
the advantages of high production flexibility, stable product
quality, low energy consumption, and low environmental pollution.
It can quickly adjust the carbon content and other components of
products according to market demand, producing different
specifications of medium and low carbon manganese iron products to
meet the needs of different users.
Application: Low carbon ferromanganese is an important ferroalloy product
widely used in the steel industry. In the steelmaking process, it
serves as a deoxidizer and alloy additive, which can improve the
strength, toughness, wear resistance, and corrosion resistance of
steel. It is commonly used in the production of high-quality carbon
steel, alloy steel, stainless steel and other steel varieties. In
addition, medium and low carbon ferromanganese has certain
applications in fields such as casting and non-ferrous metal
smelting.