Hot Melt Slag Granulation Holding Furnace Equipment

Hot melt Slag Granulation Holding Furnace

Equipment use:

  Used to receive hot melt slag from blast furnace, as blast furnace slag insulation, storage, heating facilities.

Equipment overview:

  After the intermittent discharge of blast-furnace slag is temporarily stored in the equipment, it is supplied to the granulation device according to a certain flow rate to achieve the purpose of stable and continuous granulation. At the same time, in order to reduce the slag temperature during the temporary storage and affect the subsequent granulation, the blast-furnace slag can be heated.

Product features:

  Thermal insulation furnace body and furnace cover design, minimize heat loss, maximize preheating utilization.

Main parameters and indicators:

1, slag storage amount: about 75t;
2, slag capacity 30 ~ 60 tons/hour;
3, slag discharge temperature ≧1420℃;
4, slag temperature ~ 1500℃ (to be measured);
5, heating capacity: slag maximum hourly temperature rise ≧50℃;
6, furnace body heat dissipation requirements (normal operation) :
  Furnace wall temperature: ≤ 80℃;
  Top temperature: ≤120℃;
  Furnace bottom temperature: ≤ 80℃.

Equipment structure description:

1. Furnace body;

2. Furnace lining;

3. Water cooling flow control sliding nozzle;

4.Heat preservation furnace cover and hanging device;

5. Electrode lifting system; 6, hydraulic system;

7.Short network system;

8.Water tank and water dispenser;

9.Slag inlet device;

10.Water-cooled smoke outlet;

11.Furnace opening machine;

12.Electric furnace transformer;

13.High voltage switch cabinet;

14.Electric furnace control system.

Equipment Function

• Receiving and Storing Slag: It is used to receive hot melt slag from blast furnaces or other smelting equipment and temporarily store it to buffer the intermittent discharge of slag and provide a continuous slag source for the subsequent granulation process.
• Heat Preservation and Temperature Control: By adopting effective heat preservation measures and heating devices, the temperature of the slag is maintained at a relatively high level (such as above 1400°C). This prevents the slag from solidifying during storage and ensures its fluidity, which is conducive to subsequent granulation operations.
• Controlled Discharge: According to the production requirements of the granulation system, the slag in the furnace is discharged at a certain flow rate and speed to ensure the stability and quality of the granulation process.

Structural Composition

• Furnace Body: The furnace body structure includes the furnace shell, lining, etc. The furnace shell is usually made of steel plates to ensure the strength and stability of the furnace body. The lining is composed of multiple layers of refractory materials. For example, the side lining of the furnace may include an asbestos board layer, a rammed material layer, and a carbon brick layer from the outside to the inside, and the bottom of the furnace includes a high - alumina brick layer, a refractory aggregate layer, and a carbon brick layer. This structure can effectively reduce heat loss and improve the service life of the furnace lining.
• Heating System: Electric - arc heating or other electric - heating methods are often used. The electrode lifting system is an important part of electric - arc heating, which can adjust the position of the electrode to control the heating power and heating area to ensure uniform heating of the slag in the furnace.
• Slag Inlet and Outlet Devices: The slag inlet device is used to connect with the slag - tapping equipment of the upstream smelting furnace to ensure the smooth entry of molten slag into the holding furnace. The slag outlet device is equipped with a water - cooled flow - control sliding nozzle or other flow - control devices to accurately control the slag - discharge flow rate.
• Auxiliary Systems: Including hydraulic systems, short - net systems, water - cooling systems, electrical equipment, and control systems. The hydraulic system is used to drive the electrode lifting device and other movable parts; the short - net system is responsible for transmitting electric energy; the water - cooling system is used to cool key components such as electrodes and furnace covers to prevent overheating; the electrical equipment and control system are used to control the entire operation process of the equipment, including temperature control, electrode movement control, and slag - discharge control.

Technical Characteristics

• Large Slag Storage Capacity: Generally, the slag storage capacity can reach about 75 tons, and the slag - handling capacity is 30 - 60 tons per hour, which can meet the production needs of large - and medium - sized granulation systems.
• Low Heat Loss: The heat - preservation furnace body and furnace - cover design minimize heat loss, and the heat - preservation performance is excellent. For example, when the equipment is operating normally, the furnace - wall temperature is ≤ 80°C, and the top temperature is ≤ 120°C.
• Good Temperature - Rising Performance: It has a certain heating capacity, and the maximum hourly temperature rise of the slag can be ≥ 50°C, which can quickly raise the slag temperature to the required range and maintain the stability of the slag temperature.