Online refining equipment outside the furnace is an advanced melt purification method, compared with the refining process in the furnace. The purification effect is good and does not pollute the environment. After purification, the melt can directly enter the casting machine or rolling mill without secondary pollution and improve production efficiency. The purity of aluminum melt directly affects the processing quality of aluminum, and the refining treatment of raw aluminum liquid is only carried out in the melting furnace or holding furnace. In order to reduce costs, increase output, and ensure the high quality and stability of products, many primary aluminum production and processing enterprises use off-furnace online refining (also known as online purification treatment).
In recent years, the aluminum casting company has introduced AdTech on-line refining devices outside the furnace, which are used in continuous casting and rolling production lines and aluminum alloy casting production systems. Good results have been achieved through production and operation.
Online Refining Equipment Refining Process
Air → nitrogen generator → nitrogen purification device → gas storage tank → online refining device gas control cabinet → rotating graphite rotor nozzle → aluminum melt in the refining device → purification treatment
An on-line degassing unit outside the furnace is placed between the stationary furnace and the casting machine. In the degassing box, the nitrogen blown into the aluminum melt is chopped by the rotating graphite rotor to form a large number of dispersed bubbles, so that the aluminum liquid and the inert gas are fully contacted in the furnace. Bubbles use the partial pressure difference and surface absorption principle in the melt to absorb hydrogen in the melt. And adsorption of oxidized slag. The hydrogen present in the molten aluminum is diffused into the inert gas bubbles whose hydrogen partial pressure is zero. And as the bubbles rise, they are taken out of the melt surface and escape. The solid oxide slag suspended in the aluminum liquid will also be adsorbed on the surface of the bubbles. They are removed together to achieve the purpose of purifying the aluminum melt.
AdTech online refining equipment has been successfully used in continuous casting and rolling production lines and aluminum alloy casting production systems. The performance of the equipment is stable, and it has a good purification effect on the aluminum melt, and the outgassing rate is more than 60%. The quality of the treated aluminum melt is greatly improved, the gas defects such as pores and slag inclusions of aluminum rods and aluminum alloy ingots are significantly reduced, and the yield rate is greatly improved, which creates considerable economic benefits for the enterprise.