Composed of four composite wall panels and an outer frame with wide and narrow faces. Mainly used for slab continuous casting, large cross-section square billet continuous casting, and special shaped billet continuous casting. Each composite wall panel of the combined crystallizer is composed of an inner copper plate connected by bolts (with a cooling water channel milled on the outer surface) and an outer steel water tank. A cooling water gap is formed between the inner copper plate and the outer wall for water cooling. Use a clamping mechanism to compress the four composite walls. In order to achieve online width adjustment of the crystallizer and form the required inverted taper, four sets of adjustment devices are installed on the upper and lower parts of the narrow wall panel of the crystallizer. When the assembled crystallizer and outer frame are placed on the vibration table, all inlet and outlet pipes are automatically connected. In order to better protect the lower mouth of the crystallizer and prevent premature and rapid wear, foot rollers or protective grids are installed next to the lower mouth of the crystallizer. The foot roller or protective grating vibrates together with the crystallizer. The crystallizer is directly aligned with the first section of the secondary cooling system (straight or fan-shaped) through a vibrating frame, facilitating accurate positioning of the crystallizer and the first section of the secondary cooling system. The two form a whole and can be quickly lifted.

There are two types of crystallizers according to the linear division of the inner wall of the section in the direction of casting: curved and straight; According to its overall structure, there are both sleeve and combination types for both curved and straight shapes.

The cooling water jacket composed of inner wall copper pipes, inner and outer water jackets, and foot rollers are its main components. The outer surface of straight or curved copper pipes consists of cooling water jackets, flanges, and sealing elements, forming a water supply and oil supply system. In order to ensure a regular appearance of the billet, 2-3 sets of foot rollers are installed at the bottom of the mold to improve the casting speed and prevent the billet from falling off square.