One 、 Alloy Baking Furnace This is a special equipment for baking ferroalloys. It dehydrates ferroalloys such as ferrosilicon, ferromanganese, ferrochromium, ferromolybdenum, ferrotitanium, and ferrovanadium by baking at 200℃ to remove free water and at 400-600℃ to remove crystalline water, so that the alloy reaches the required temperature and meets the requirements of steelmaking process, shortening the smelting time and improving the quality of steel.

Technical Description: Since the alloy removes free water at around 300℃ and crystalline water at 300-600℃, the alloy needs to be dehydrated, and the heating temperature must reach above 400℃.

As a special equipment for baking ferroalloys, it must meet the following requirements ：

1. The alloy material is heated to 300-600℃;

2. Heating method: Indirect heating method, using annular combustion chamber baking method. The flame sprayed from the inner spray holes of the annular combustion chamber directly bakes the alloy material in the material bin, and the baking temperature can reach 500-600℃.

3. The combustion adopts oxygen-enriched combustion, and the coal gas combustion rate is above 99%, forming harmless flue gas;

4. The burner mouth uses heat-resistant steel to extend its service life;

5. Control method: Manual control, automatic control (optional)

6. Ignition method: Manual ignition, automatic ignition (optional, automatic ignition must have a high calorific value gas source)

7. Combustion medium: Coke oven gas, converter gas, natural gas;

Two, Working Principle and Characteristics of Alloy Baking Equipment ：

1. Coal gas is burned through the burner to produce a high-temperature flame of about 1300℃, which is blown into the annular combustion chamber. In the combustion chamber, it is preliminarily mixed with the matched cold air, and further reacts at high temperature, burning out the carbon monoxide in the coal gas to form a non-toxic high-temperature flame above 1000℃.

2. Due to the intermittent discharge of steelmaking in alloy use and continuous heating, and the heating temperature is at the bottom of the alloy bin, countercurrent heating is formed from bottom to top, so that the discharged material from the bin is close to the baking temperature, reaching 300-600℃.

3. Due to the high baking temperature, refractory materials can be built in the furnace body for heat preservation to ensure thermal efficiency.

Three, Alloy Baking Equipment Composition It consists of a special gas burner, an annular combustion chamber, a circular furnace body, a furnace body support and operating platform, an auxiliary air blower, air-gas pipelines, an automatic and manual adjustment system, a gas pressure control system, a gas quick-cut system, and an electrical control system, etc.

1. The burner includes an automatic ignition nozzle: The automatic ignition nozzle and the gas nozzle are both made of stainless steel;

2. The alloy baking furnace consists of an annular combustion chamber, inner lining (shaped refractory material), and a burner to achieve the required baking temperature.

3. The observation hole can clearly observe the flame pattern and control the flame combustion situation.

4. The auxiliary air blower supplies air for burner combustion.

5. The electrical control system consists of a quick-cut valve, a detection system, and an alarm system; controlled by PLC, operated by a touch screen, realizing automatic ignition; flameout protection, flow monitoring, automatic temperature control, and rapid gas shutoff.

Four, Function Realization:

1. Automatic ignition: Realizing electronic automatic ignition.

2. Flame detection, flameout protection: Equipped with a flame detector, if a flameout is detected, the gas will be immediately cut off, and an audible and visual alarm will be triggered.

3. Low pressure alarm: When the gas pressure is below 5 kPa and the air pressure is below 3 kPa, an audible and visual alarm will be triggered for low pressure.

4. Power failure protection: When the power is off, the gas will be quickly cut off to prevent danger.

5. Flow monitoring: The gas is equipped with a flow meter to display the gas flow at any time.

6. Temperature detection, automatic temperature control: According to the collected temperature data, the PLC automatically controls the frequency conversion fan to adjust the hot air temperature.

7. Gas quick-cut valve: Equipped with a gas quick-cut valve, which can automatically cut off when a fault occurs and cannot be adjusted by itself.

Five, Safe Operation Procedure of Alloy Baking Equipment ：

1. Check for gas leaks in the pipeline and check if the electrical connections are normal. Check if all valves are in the closed position.

2. After completing step 1 and confirming that everything is normal, start the auxiliary air blower, open the air valve, and purge for 2 minutes.

3. After completing step 2, press the ignition button. First, open the auxiliary air valve and purge for 60 seconds. After 60 seconds, close the air valve and start ignition. The ignition time is 9 seconds, and the ignition solenoid valve opens at the same time. If a flame fault alarm occurs after 9 seconds, the ignition solenoid valve closes. If no flame fault alarm occurs after 9 seconds, normal combustion occurs.

4. If the auxiliary air blower is running normally and there is no fault in the igniter flame, the gas quick-cut valve can be opened.

5. 5 seconds after starting the gas quick-cut valve, if no flame fault is detected, open the main gas valve and auxiliary air valve at the same time, then close the ignition solenoid valve;

6. When the hot air temperature exceeds a certain value (e.g., 520℃, this value can be set arbitrarily), the supplementary air fan turns on and begins to adjust automatically. When the hot air temperature is below a certain value (e.g., 490℃, this value can be set arbitrarily), the supplementary air fan turns off.

7. When the baking temperature exceeds a certain value (e.g., 600℃, this value can be set arbitrarily) and continues for a certain period of time (e.g., 10 minutes, this value can be set arbitrarily), and the variable frequency opening reaches more than 95%, the gas and auxiliary air regulating valves are closed simultaneously. After the temperature drops, the valves automatically open again.

8. When shutting down, turn off the gas first, purge for 5-10 minutes, stop the fan, and check all valves to ensure they are in the closed position.

VI. Equipment Maintenance:

1. Regularly check the air intake filter of the fan for damage or blockage, and clean or replace it as needed.

2. Check for dust accumulation on electrical components and ensure all connections are secure.

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