The main function of the casting system in the strip casting and rolling production line is to transport the liquid aluminum from the static furnace to the feed nozzle, remove the oxides and gases in the aluminum liquid, and keep the metal pressure in the feed nozzle unchanged to ensure aluminum The liquid can be smoothly continuously supplied to the casting and rolling system from the static furnace.
The casting system is composed of launder, front box and liquid level control device, feed nozzle, aluminum titanium boron wire feeding device, refining and degassing device outside the furnace, etc. As the assembly position of the feed nozzle directly affects its service life and the quality of the cast-rolled billet, in order to ensure the tolerance between the feed nozzle and the casting roll, a feed nozzle adjustment device must be installed.
Casting system used in down-casting rolling mills. The front box is mounted on the trolley. There is a buoy above the front box to control the level of the melt. The structure of this casting system is complicated. Manufacturing, assembly, adjustment and operation are quite difficult.
The casting system used by the inclined strip casting and rolling mill installs the front box, the cross runner and the feed nozzle on the bottom plate and merges them into a whole, which is convenient to use the casting system adjustment mechanism. Precise positioning of the feed nozzle.
The casting system structure used in the horizontal strip casting and rolling mill. It is mainly composed of launder, ceramic plug, buoy, vertical pipe, front box and feed nozzle. The exterior of the launder is welded by steel plate, and the inner lining is made of aluminum silicate clay, and the aluminum liquid is made of aluminum silicate clay. The manufactured vertical tube flows into the front box, and the lower end of the vertical tube has a buoy made of aluminum silicate clay, which floats on the aluminum liquid surface to control the height of the metal liquid surface of the front box. In addition, in order to blow nitrogen into the aluminum liquid, two ceramic plugs that can be porous and gas-permeable are installed at the bottom of the launder. Nitrogen can be blown into the aluminum liquid through the two ceramic plugs. In blowing, according to the different nitrogen consumption, choose ceramic plugs of different structures, and adopt different installation methods accordingly.