Introduction of crystallizer

The mold is a continuous steel casting equipment that accepts molten steel injected from the intermediate tank and solidifies it into a solid shell according to the specified cross-sectional shape. It is the most critical component of the continuous casting machine, and its structure, material and performance parameters play a decisive role in the quality of the slab and the production capacity of the casting machine.

Introduce

The Crystallizer is a tank-shaped vessel with a jacket on the wall or a coiled tube in the vessel to heat or cool the solution in the tank. Crystallization tanks can be used as evaporative crystallizers or cooling crystallizers. In order to improve the strength of crystal production, a stirrer can be added in the tank. Crystallization tanks can be used for continuous operation or batch operation. The crystals obtained by intermittent operation are larger, but the crystals are easily connected into crystal clusters, and the mother liquor is entrained, which affects the purity of the product. The crystallizer has a simple structure and low production intensity, and is suitable for the production of small batches of products (such as chemical reagents and biochemical reagents, etc.).

Classification

There are two types of linear crystallizers on the inner wall of the section in the direction of billet drawing: arc and straight; according to their overall structure, whether arc or straight, there are two types of casing type and combined type.

Casing

The inner copper tube, the cooling water jacket composed of inner and outer water jackets and the foot roller are its main components. The outside of the straight or arc-shaped copper pipe is composed of a cooling water jacket, flanges and sealing elements to form a water supply and oil supply system. In order to ensure that the billet has regular dimensions, 2 to 3 sets of foot rolls are installed at the bottom of the mold to improve the pulling speed and prevent the billet from falling out of the square.

Combined

It is composed of 4 composite wall panels and an outer frame with wide and narrow sides. It is mostly used for slab continuous casting, large section billet continuous casting and special-shaped billet continuous casting. Each composite wall plate of the combined crystallizer is composed of an inner wall copper plate (the outer side is milled with a cooling water ditch) connected by studs and an outer wall steel water tank. A cooling water gap is formed between the inner wall copper plate and the outer wall for cooling through water. The 4 composite walls are compressed by a clamping mechanism. In order to realize the online width adjustment of the mold and to form the required reverse taper, four sets of adjustment devices are installed on the upper and lower parts of the narrow wall of the mold. When the assembled mold and outer frame are placed on the vibrating table, all the water inlet and outlet pipes are connected by themselves. In order to better protect the lower mouth of the mold and prevent premature and rapid wear and tear, a foot roller or a protective grid is installed next to the lower mouth of the mold. Foot rollers or protective grids vibrate together with the mold. The crystallizer and the second cooling first section (straight line or sector) are directly centered through the vibration frame, which facilitates the accurate positioning of the crystallizer and the second cooling first section. The two form a whole, which can be lifted quickly.