This product is processed through a special technique using various salt compounds and specific types of rare earths. It is sprayed evenly into the aluminum melt using a powder sprayer with nitrogen or argon as the carrier gas, thereby achieving dual purification of the aluminum melt by both gas and flux.
·Characteristics: white powder, 2.5kg/bag.
·Applicable alloy: Used for melting pure aluminum and various commonly used grades of aluminum alloys.
·Processing temperature: 700℃~760℃.
Recommended dosage: Add (0.1~0.4)% based on the weight of the aluminum liquid.
Packaging and Storage: Packed in cardboard boxes or woven bags lined with plastic bags, each weighing 20kg or 25kg. Properly stored and strictly protected from moisture.
main advantages
Purifying aluminum liquid: Rare earths have a strong affinity for hydrogen, capable of adsorbing and dissolving a large amount of hydrogen, significantly reducing the hydrogen content and porosity of aluminum.
◀ Grain refinement: Rare earth element metals have large atomic radii, which can fill the surface of new phases in aluminum and its alloy grains, forming a film that hinders grain growth, thus refining the grains. The addition of A/TiB leads to the formation of AlTiRe compounds, providing a longer-lasting refinement effect.
Improve the performance of cast eutectic (Al-Si eutectic) alloys, and enhance the casting and mechanical properties of aluminum alloys.
Improve polishing performance, make the aluminum alloy surface brighter, enhance oxidation resistance, and prolong the service life of the alloy.
Instructions for use
Within the refining temperature range, load a fixed amount of refining agent into the powder injector's storage tank and secure it. First, introduce nitrogen [at a pressure of (1.2~1.8) kg/cm²]. Then, open the switch beneath the refining tank. When the iron tube starts discharging refining agent, insert it into the aluminum liquid and move it horizontally. The ideal insertion depth is such that the end of the iron tube is at 3/4 of the aluminum liquid's depth. Move the iron tube around, avoiding contact with the furnace wall to prevent blockage. During the refining process (10-15 minutes for 6-20 tons), spray all the flux and then withdraw the iron tube from the aluminum liquid. Finally, turn off the nitrogen supply.
Precautions
A. Control the speed of powder feeding by adjusting the size of the switch at the bottom of the refining tank, ensuring that flux is sprayed out as much as possible within the refining time.
B. By controlling the nitrogen pressure, we can regulate the agitation height of the aluminum liquid. Under the premise of not blocking the tube, a lower agitation level is preferable, ideally below 15cm.
