Aluminum ingot slag removal nitrogen cooling treatment method

Abstract

The invention belongs to the technical field of aluminum alloy processing and discloses an aluminum ingot slag removal nitrogen cooling treatment method. The method comprises the following steps thatin a molten aluminum solution of a casting ladle, firstly, nitrogen is used for blowing a slag removal agent into the molten aluminum for 12 minutes continuously, then hydrogen is used for blowing theslag removal agent into the molten aluminum for 3 minutes continuously, molten aluminum slag discharged from a furnace is fed into a porous rotary barrel of a rotary barrel granulator, along with thehigh-speed rotation of the porous rotary barrel, the molten aluminum slag is thrown out from holes, and then the molten aluminum slag is granulated into particles in a nitrogen atmosphere to obtain the granulated aluminum slag. According to the method, procedures of preparation of a slag basin or a slag tank, slag lifting, crushing of slag blocks and the like in a traditional working procedure are omitted, process flows after the aluminum slag discharging from the furnace are greatly simplified, cooling treatment time of the aluminum slag is saved, the cooling efficiency is improved by 3-4 times, the cooling cost of the aluminum slag is reduced, and a novel method which is high in efficiency, easy to operate and economical and practical is provided for the cooling treatment of the moltenaluminum slag.

Description

technical field [0001] The invention specifically relates to a nitrogen cooling treatment method for removing slag from aluminum ingots, and belongs to the technical field of aluminum alloy processing. Background technique [0002] At present, with the application of aluminum profiles in the industrial field more and more widely, the requirements for the shape, dimensional accuracy and surface quality of aluminum profiles are getting higher and higher, and the market competition is becoming more and more fierce. cost, increase production efficiency, and improve the extrusion production line. In the transformation process of the extrusion production line, in addition to trying to reduce the auxiliary time of the extrusion machine, the speed-up extrusion method is also adopted. In China, the traditional method of increasing the extrusion speed is Using low-temperature extrusion technology, in foreign countries, advanced extrusion production lines often use mold or extrusion ba...