Introduction to the Pure Oxygen Vertical AOD Refining Furnace Baking Device: AOD furnace baking is a refining process currently widely used in China's metallurgical enterprises for refining stainless steel. Its characteristics are: baking is carried out using a fully covered or semi-open cover method, using a laminar premixed low-pressure burner with gas as fuel. The high-temperature flame from combustion directly hits the bottom of the furnace, and then the high-temperature flue gas returns along the bottom of the vessel, forming a flow with the subsequently sprayed high-temperature flue gas, making the temperature inside the vessel uniform, preventing the furnace from cracking due to local high temperatures, improving the service life of the furnace lining materials, and reducing material and labor costs.

The AOD furnace all-oxygen intelligent baking device mainly consists of a baking support, a cover, an elevation drive winch, a cantilever beam, an all-oxygen burner, a PLC intelligent combustion control system, and a fuel pipeline system.

The working process is: The cantilever beam is rotated 85° by the winch (or hydraulic push rod), and then the AOD furnace is lifted away by the crane. Oxygen and coal gas are passed through Hollow rotating shaft Input to the all-oxygen burner. Because AOD furnaces are generally deep In order to achieve overall baking of the AOD furnace internal refractory materials to the furnace body temperature used for refining, a custom-made AOD furnace baking device from Zhengzhou Zhongwei Environmental Protection Equipment Co., Ltd. is used. The long flame reaches the bottom of the vessel, ensuring uniform heating of the furnace lining and extending the service life of the furnace lining.

Baking capacity: 4T~65T AOD furnace Fuel medium: Various combustible gases Fuel pressure: 4~15Kpa Baking temperature: 800~1100℃.

Features of Zhongwei Energy-Saving AOD Furnace Baking Device:

1. Wide range of applicability for fuel media, including various coal gases (blast furnace gas, mixed coal gas, converter gas, coke oven gas, and natural gas), etc.
2. The frame adopts a triangular frame design, with reasonable stress distribution, good bending and anti-bending performance, stable and firm, reducing the requirements for the foundation.
3. Reliable performance and long lifespan. Key parts of the all-oxygen burner adopt a double-layer design, with high-temperature castable refractory materials filled inside, made of stainless steel and Q235 steel, with stable combustion performance.
4. Low baking cost. Because the Zhongwei energy-saving all-oxygen baking device can use low calorific value fuels such as blast furnace gas, converter gas, and producer gas, it reduces the baking cost.
5. It can meet the requirements of rapid temperature rise and can also be baked according to the curve. During offline drying and baking, depending on the combustion medium used, the furnace body temperature can be baked from room temperature to around 1000℃ in about 4h~6h. During online temperature increase baking, the molten steel can be quickly raised to above 900℃-1000℃;
6. Small temperature difference inside the AOD furnace. The burner uses a laminar high-speed nozzle, and the high-speed hot gas flow directly hits the bottom of the vessel, strengthening the convective heat transfer to the lining, resulting in a temperature difference of ≤50℃ between the top and bottom of the lining:
7. Stable and reliable operation. The lifting winch is equipped with a pulley group and a speed reduction and load reduction mechanism, and is equipped with mechanical and electrical double limit switches, making the equipment run smoothly, with low noise, and safe and reliable;
8. The baking device cover is easy to open, with a maximum of 85°, facilitating operation;
9. Convenient ignition of the baking device (constant flame, no need for repeated ignition after one-time ignition.

PLC computer precisely controls the fuel-air ratio, resulting in higher combustion efficiency. All-oxygen combustion saves 40-70% gas compared to general baking technology, and the baking cost is lower.

Scope of application Used for online/offline baking of AOD furnaces, steel (iron) ladles, and continuous casting tundishes, including drying newly built vessels, fast or slow baking of circulating vessels, and fast baking of online ladles (tundishes).

Offline AOD furnace baking For fast or slow baking of newly built AOD furnaces and circulating AOD furnaces.

The heating temperature can reach above 1000°℃, the maximum heating rate is 50℃/min, the maximum temperature difference in the furnace is 50℃, and the offline baking of the cold furnace takes 2.5 hours, and the lining temperature reaches around 800℃-1000℃.

Online AOD furnace temperature increase baking For rapid baking of molten steel in online AOD furnaces, heating to above 1000℃, with a maximum heating rate of ≥50℃/min, and a maximum temperature difference of 50℃ in the furnace. Baking the refractory materials of the online AOD furnace for 30-50min, the lining temperature can reach around 800℃-1000℃.

Technical data source: Zhengzhou Zhongwei Environmental Protection Equipment Co., Ltd.

Address: No. 118, Fengqing Road, Jinshui District, Zhengzhou City
Tel:+86-371-60960056
Mobile:+8613849187223
Email:zhongweigongyelu@126.com