Tech Team · Kintek Solution

Batch furnaces are used for heat treatment of steel and come in various types, each designed for specific applications and processes. Here are the seven main types:

1. Box-Type Batch Furnace: This is the most common and basic type, resembling a highly insulated steel box with a door on one end. It is used for small to medium-sized parts and can be heated using electric resistance or fuel. These furnaces are versatile and can be used for annealing, pack-carburising, and hardening of low alloy steels. The furnace chamber is typically rectangular and loading/unloading is often done manually.

2. Bogie-Hearth Furnace: These furnaces are designed for larger components and feature a movable hearth that can be loaded and unloaded using cranes. This design allows for efficient handling of heavy loads and is suitable for processes requiring precise temperature control.

3. Muffle Furnace: Muffle furnaces use a separate heating element that does not come into direct contact with the material being treated. This design helps in achieving cleaner and more controlled heat treatments, especially useful for processes that require high purity or specific atmospheres.

4. Pit Furnace (Vertical Furnace): These furnaces are installed below ground level, which reduces the space required for their operation. They are suitable for large components and can be accessed by lowering materials into the pit. This type is often used in applications where space is a constraint.

5. Bell Furnaces: Bell furnaces consist of a bell-shaped cover that is lowered over the material to be treated. This design is particularly useful for processes that require a controlled atmosphere or when treating large batches of smaller items.

6. Salt Bath Furnaces: These furnaces use a bath of molten salt as the heating medium. The material to be treated is immersed in the salt, which provides rapid and uniform heating. Salt bath furnaces are ideal for processes requiring rapid heating or specific thermal cycles.

7. Fluidized-Bed Furnaces: In these furnaces, a bed of particles is fluidized by a flow of gas, typically air or nitrogen. The fluidized bed acts as a heating medium, providing rapid and uniform heating. This type is particularly effective for processes that require rapid heating and cooling cycles.

Each type of batch furnace offers specific advantages and is chosen based on the requirements of the heat treatment process, the size and type of components being treated, and the specific operational needs of the manufacturing process.

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