Continuous Casting Machine: A Professional Introduction

What is a Continuous Casting Machine?

Continuous casting is a production process that involves continuously casting high-temperature molten steel into billets with specific cross-sectional shapes and sizes. The equipment essential for executing this process is known as a continuous casting complete set of equipment. This electromechanical-hydraulic integration encompasses steel pouring equipment, caster body apparatus, cutting area equipment, and dummy bar collection and transportation systems, collectively forming the core of what is traditionally referred to as a continuous caster.

Components of a Continuous Caster

The continuous caster comprises several key components, including:

• Turret or Ladle Car: Transports the ladle containing refined molten steel.
• Central Package (Tundish): Acts as a reservoir that distributes molten steel to multiple crystallizers.
• Stopper Hoist Device: Controls the flow of molten steel from the tundish.
• Mold: A water-cooled copper component where the molten steel begins to solidify.
• Vibration Device: Vibrates the mold to enhance the quality of the solidifying shell.
• Hoisting Operation Support Device: Supports the lifting and lowering operations during casting.
• Cold Spray Device: Applies cooling water to the solidifying billet.
• Slab-Oriented Straightening Machine: Straightens the billet after it exits the mold.
• Dummy Bar and Storage Track: Used to initiate the casting process and store the dummy bar when not in use.
• Cooling Bed: Provides additional cooling for the billet after straightening.
• Pusher Machine: Pushes the billet along the cooling bed.
• Water System and Cold Pumping Steam System: Manage cooling water circulation and steam removal.
• Electronic Control and Hydraulic Systems: Control various operations and movements within the caster.

Technological Process of Bloom Caster

The process begins with a ladle containing refined molten steel being transported to the rotary table. Once the rotary table rotates to the pouring position, the molten steel is poured into the tundish. From there, the molten steel is distributed to each crystallizer via water nozzles. The mold, a core component of the continuous casting machine, facilitates rapid solidification of the casting. The tension leveler and crystallization vibration device work in tandem to pull the castings out of the mold. After undergoing cooling and electromagnetic stirring, the castings are cut into slabs of predetermined lengths.

Automatic control in continuous casting primarily involves speed control of the drawing rollers, vibration frequency control of the mold, fixed-length cutting control, and other advanced control technologies.

Production Process of Billet Caster

In the billet casting process, high-temperature molten steel is continuously poured into one or a group of water-cooled copper crystallizers. The molten steel gradually solidifies into a billet shell along the periphery of the crystallizer. Once the steel level rises to a certain height and the billet shell solidifies to a specific thickness, the tension leveler pulls the billet out. The billet is then cooled by water spraying in the secondary cooling area to ensure complete solidification. Finally, the cutting device cuts the billet to a fixed length according to steel rolling requirements.

This process, known as continuous casting, fundamentally transformed the traditional one-off rolling process of steel ingots, which had dominated for a century. Continuous casting simplifies the production process, enhances production efficiency and metal yield, saves energy consumption, significantly reduces production costs, and yields high-quality billets. As a result, it has experienced rapid development and is now an indispensable piece of equipment in steelmaking enterprises, whether they employ long-process or short-process steelmaking methods.
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