Refining agents are added in the smelting of aluminum alloys to remove gases from the melt, thereby increasing the density of aluminum liquid during die casting. In addition, refining agents can also remove impurities from aluminum alloy melt, making the melt purer. After adding refining agents, a layer of floating slag can be formed on the liquid surface to avoid contact oxidation with air.

      Removing impurities is to achieve the purpose of refining, and commonly used refining agents include chloride salts, dehydrated zinc chloride, manganese chloride, ferric chloride, etc., to remove gas and slag in a timely manner. The main process is to decompose hydrogen gas, add it at high temperatures, and then react to remove the gas in a timely manner, achieving the purpose of refining. The amount of refining agent added needs to be controlled, and accurate calculations should be made before adding.

      In addition to adding refining agents during smelting of aluminum alloy melt, covering agents, slag cleaning agents, etc. are also added. Refining agents are added when the aluminum alloy melt reaches 720 degrees, and tools are used to press it to the bottom and slowly move it until it no longer bubbles. Hydrogen gas in the aluminum alloy melt can be removed in a timely manner, and then slag cleaning agents can be added. Tools need to be used for thorough stirring to remove impurities in a timely manner. In addition, a covering agent should be sprinkled on the surface to prevent hydrogen gas from entering the aluminum melt and causing further pollution.

      Refining agents play a very important role in smelting aluminum alloys, and manufacturers should add them according to their needs. During the addition process, attention should be paid to problem control, and professional personnel should be involved to ensure the safety of the operation.