Aluminum ingot continuous casting process

Continuous casting can be divided into two ways of mixing furnace casting and casting. Both use continuous casting machines. Mixing furnace casting is the casting of aluminum liquid into the mixing furnace and casting by the mixing furnace. It is mainly used to produce aluminum ingots for remelting and casting alloys.

Outer casting is carried out directly from the bag to the casting machine. It is mainly used when the casting equipment cannot meet the production requirements, or the quality of the incoming material cannot be directly introduced into the furnace. Since there is no external heating source, the bag is required to have a certain temperature, generally 690 to 740° C. in summer and 700 to 760° C. in winter, to ensure a better appearance of the aluminum ingot. Mixing furnace casting, first through the ingredients, and then poured into the mixing furnace, stir evenly, then add the flux refining. The cast alloy ingot must be clarified for more than 30 minutes, and the slag can be cast after clarification.

During casting, the furnace furnace eye is aligned with the second and third casting molds of the casting machine. This ensures that the fluid flow changes and there is a certain degree of maneuverability during mold change. The furnace eye and the casting machine are connected by a runner, and the runner is shorter, which can reduce the oxidation of aluminum and avoid vortexing and splashing. When the casting machine is deactivated for more than 48 hours, the mold is to be preheated for 4 hours before being restarted. The molten aluminum flows into the mold through the flow cell, and the oxide film on the surface of the aluminum liquid is removed with a shovel, which is called slag. After a full mold is reached, the runner is moved to the next mold and the caster continues to advance.

The mold advances in sequence and the aluminum liquid gradually cools. When it reaches the middle of the casting machine, the aluminum melt has solidified into an aluminum ingot, and the printer prints the melting number. When the aluminum ingot reaches the top of the casting machine, it has been completely solidified into aluminum ingots. At this time, the mold is turned over, the aluminum ingot is ejected from the mold, and it falls on the automatic splice car, and is automatically stacked and bundled by the stacker to become finished aluminum. ingot. The casting machine is cooled by the spray of water, but the water must be supplied only after the casting machine is fully turned. About 8 to 10 tons of water are consumed per ton of aluminum liquid, and it is necessary to add a blower for surface cooling in the summer. The ingot is cast in a flat mold. The solidification direction of the aluminum liquid is from bottom to top, and the upper middle is solidified later, leaving a groove-shaped depression. The solidification time and conditions of the various parts of the aluminum ingot are not the same, so the chemical composition will also be different, but it is in line with the standard as a whole.