Method for recycling aluminum ash

Abstract

The invention provides a method for recycling aluminum ash. The method comprises the following steps: (1) digging out hot aluminum ash positioned on the surface of a smelting furnace, and conveying the hot aluminum ash into an aluminum ash frying pot within 5 minutes for stirring; (2) controlling the temperature of the aluminum ash inside the aluminum ash frying pot to 720-760 so that aluminum contained in the aluminum ash is melted into molten aluminum and layered with slag; (3) draining the molten aluminum from an open pore formed in the bottom of the aluminum ash frying pot till no molten aluminum is drained from the open pore formed in the bottom of the aluminum ash frying pot; and (4) discharging the slag from the aluminum ash frying pot, and conveying into a cooling barrel provided with cooling equipment for cooling, cooling the slag to 60-100 DEG C within 30 minutes, continuously crushing and grinding the slag in a cooling process, conveying the crushed and ground slag into a screening barrel for screening, and screening to obtain fine ash, medium screened ash and coarse ash. According to the method for recycling the aluminum ash, which is provided by the invention, the oxidation of the aluminum ash in a recovery process can be effectively reduced and the recovery rate of aluminum contained in the aluminum ash is increased.

Description

technical field [0001] The invention relates to the technical field of aluminum ash recycling, in particular to a method for recycling aluminum ash. Background technique [0002] In the casting process of aluminum profiles, when aluminum ingots are smelted into molten aluminum in a smelting furnace, slag will be generated, and these slag will float above the molten aluminum, also known as aluminum ash. Aluminum ash has a large output in the field of aluminum profile production. If it is not used reasonably, it will not only waste resources, but also cause serious pollution. Aluminum ash contains a certain content of aluminum, which has recycling value. The traditional method of recycling aluminum ash is to re-melt the aluminum ash through a crucible furnace or an aluminum ash frying pan (referred to as frying pan for short), and then recover the molten aluminum formed by remelting. This method of recycling aluminum ash has some defects. The use of crucible furnace to proce...

AI Technical Summary

Problems solved by technology

There are some defects in this aluminum ash recovery method. Using a crucible furnace to process aluminum ash is not only inefficient, but also inconvenient to operate, which consumes a lot of manpower and material resources, and cannot adapt to large-scale production; the aluminum recovery rate of this aluminum ash recovery method is low, and it is not very good. The recycling effect of aluminum ash is not perfect; because the process of aluminum ash recycling is not perfect, resulting in high-temperature aluminum ash (up to about 700 ℃) from the melting furnace for reuse, the oxidation of aluminum ash is serious, which affects the recovery of aluminum ash Aluminum purity

Moreover, after the molten aluminum in the lower layer is smelted and recovered in a crucible furnace or ash frying pot, the slag in the upper layer is usually not utilized, but is discarded. Slow natural cooling causes serious oxidation and waste of resources