Types Of Continuous Casting Machine

Hani Metallurgy takes you to understand their characteristics.

Characteristics & Types of Continuous Casting Machine

Vertical continuous casting machine

Its billet shell is cooled evenly and is not affected by bending and straightening, so it is not easy to produce internal cracks and surface cracks, which is more conducive to floating inclusions;

However, the height of the equipment is very high, which causes inconvenience in operation, increases the cost, and increases the difficulty of maintenance and handling of the equipment. In addition, the cross-section, fixed length and drawing speed of the slab are limited, and the problem of deformation of the slab belly due to the high hydrostatic pressure of the slab is more prominent.

Vertical bending continuous casting machine

The tundish, crystallizer, guide roll and dummy bar of the casting machine are distributed along the vertical line.

The cutting machine is arranged horizontally, and the pouring and cooling and solidification are completed in the vertical direction. After being completely solidified, it is bent at 90° and enters the bending section, and the blank is released in the horizontal direction. The height of the casting machine is lower than that of the vertical casting machine, which is convenient for transportation. , can be suitable for longer length requirements, but due to the addition of a bending and straightening, it will cause cracks.

Arc continuous casting machines

It is divided into three types: single-point straightening arc continuous casting machine, multi-point straightening arc continuous casting machine and straight mold arc continuous caster.

Describe the strengths and weaknesses of these three in detail.

Single point straightening arc continuous casting machine

Преимущество

Its height is lower than that of the vertical type and the vertical bending type, so the equipment is light in weight, low in cost, convenient in installation and maintenance, and the static pressure of the molten steel on the billet is small, which can reduce the inner row and segregation caused by the stock belly, and is beneficial to improve the tensile strength. Quickly improve the quality of billet.

Shortcoming

During the solidification process of molten steel, non-metallic inclusions tend to focus in the arc, which can easily cause uneven distribution of impurities inside the slab;

Multi-point straightening arc continuous casting machine

Преимущество

The deformation rate of the solid-liquid interface is reduced. When the slab is straightened with a liquid core, no internal cracks will occur, which is beneficial to increase the casting speed;

Straight Mold Arc Continuous Caster

Преимущество

It has the advantages of vertical type, which is beneficial to the floating of large inclusions and the average distribution of inclusions in steel. It is higher in height than vertical bending type, and the construction cost is low.

Shortcoming

The slab shell on the outer arc side of the slab is stretched, and the two-phase area is easy to cause crack defects. The equipment structure is complicated, and it is difficult to overhaul and maintain.

Oval continuous casting machine

Compared with the curved shape, its height is greatly reduced, the static pressure of molten steel is low, the amount of slab stock is small, the segregation of the internal crack center is improved, and the cost can be saved by 20% to 30% compared with the curved shape. However, the inclusions in molten steel in the crystallizer have almost no chance of floating, so the requirements for molten steel are relatively strict.

Horizontal continuous casting machine

Its advantage is that the height of the equipment is low, the molten steel is oxidized twice, the quality of the slab is improved, it is not subject to bending and straightening, it is beneficial to prevent cracks, the equipment is easy to maintain, and the problem is convenient to deal with;

However, relatively speaking, the separation between the tundish and the crystallizer is more expensive, the lubrication between the mold and the billet is difficult, and the mold does not vibrate during casting, suitable for small billets, multiple castings, square billets below 200mm, round billets, Special Steel.

Among the five types of continuous casting machine, horizontal continuous casting machines, vertical continuous casting machines, and arc continuous casting machines are the most popular among customers.

When we choose CCM, we must choose the appropriate type according to the requirements of our own products, and at the same time pay attention to choosing high-quality and good after-sales manufacturers.