Technology for treating cold aluminous ash by utilization of tilting furnace

Abstract

The invention relates to a technology for treating cold aluminous ash by the utilization of a tilting furnace and is characterized in that the treatment technology comprises the following steps of: crushing the cold aluminous ash, screening to coarse grains for later use; adding a special fluxing agent which accounts for 5-20% of the total addition amount into the tilting furnace with a heating device arranged on the furnace mouth, wherein the special fluxing agent is made from 90-96% of chloride and 4-10% of fluoride; turning on a combustor, beginning heating, simultaneously rotating the tilting furnace, adding the cold aluminous ash coarse grains which account for 80-95% of the total addition amount after the special fluxing agent is melted in the tilting furnace; rotating and heating until an aluminium alloy liquid and the ash in the cold aluminous ash are separated, the aluminium alloy liquid is collected on the bottom and the ash flows on the surface of the aluminium alloy liquid, pouring out the aluminium liquid, and pouring out solid ash while rotating the tilting furnace. The special fluxing agent is used to improve the interfacial tension between the ash and the aluminium alloy and make it easy to separate the ash and the aluminium alloy. In the meantime, the covered aluminium will not be further oxidized. Therefore, the technology provided by the invention helps raise metal recovery rate and is suitable for scale production.

Description

technical field [0001] The invention relates to a process for processing cold aluminum ash slag by using a rotary furnace, in particular to a process for processing cold aluminum ash slag produced in aluminum alloy production by using a rotary furnace, and belongs to the field of aluminum alloy processing. Background technique [0002] At present, to deal with the aluminum ash produced in aluminum alloy, one is to cool and separate, enrich into cold ash with higher aluminum content, and then smelt and recover the aluminum alloy components in a crucible furnace; the other is to use a rotary barrel in a hot state. Or slag pressing machine or ash mixing machine and other equipment for processing and recycling; these methods have the following problems: 1. The crucible furnace handles cold ash, the production capacity is small, it cannot adapt to large-scale production, and the pollution is relatively large; 2. The rotary drum can only handle hot ash The slag cannot be handled f...

AI Technical Summary

Problems solved by technology

[0002] At present, to deal with the aluminum ash produced in aluminum alloy, one is to cool and separate, enrich into cold ash with higher aluminum content, and then smelt and recover the aluminum alloy components in a crucible furnace; the other is to use a rotary barrel in a hot state. Or slag pressing machine or ash mixing machine and other equipment for processing and recycling; these methods have the following problems: 1. The crucible furnace handles cold ash, the production capacity is small, it cannot adapt to large-scale production, and the pollution is relatively large; 2. The rotary drum can only handle hot ash slag, which cannot be processed for cold ash; 3. It is also difficult for slag presses or ash mixers to adapt to large-scale production

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