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Waste aluminum recycling method

A pretreatment and crucible technology, applied in the field of waste aluminum recycling, can solve the problems of complex process and a large amount of aluminum slag, and achieve the effects of reducing production cost, good thermal stability, and realizing carbon emission reduction and recycling.

Active Publication Date: 2020-01-31
SUZHOU UNIV
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  • Claims
  • Application Information

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Problems solved by technology

The traditional processing method is not only complicated in process, but also produces a large amount of aluminum slag during the smelting process

Method used

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  • Waste aluminum recycling method
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Examples

Experimental program
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Effect test

Embodiment 1

[0058] The discarded aluminum pop cans were broken into 2mm×2mm aluminum flakes, the aluminum flakes were cleaned and dried, and then treated in a high-temperature furnace at 500°C for 30 minutes for paint removal.

[0059] After mixing the above-mentioned aluminum flakes with lithium carbonate molten salt evenly, place them in the reaction furnace, pass 200ml / min high-purity argon gas for 12 hours, and blow away the remaining air in the reaction furnace and pipeline. Then the reaction furnace was raised to 900°C at a rate of 5°C / min, and 40ml / min CO was introduced at 500°C. 2 The gas reacts.

[0060] The generated tail gas is removed by soda lime and dried by silica gel, and then enters the gas chromatograph to record the change of carbon monoxide concentration.

[0061] Collect solid product, and carry out X-ray diffraction phase analysis, the result sees image 3 and using a scanning electron microscope to observe the morphology of the solid product, the results are shown...

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Abstract

The invention discloses a waste aluminum recycling method. The waste aluminum recycling method comprises the following steps that waste aluminum is pretreated; mixing the pretreated waste aluminum with lithium carbonate molten salt, then putting the mixture into a crucible, putting the crucible into a reaction furnace, and introducing an inert gas to exhaust air in the reaction furnace; heating toa reaction temperature and introducing carbon dioxide for reaction; and collecting the reacted tail gas and solid products. According to the waste aluminum recycling method, firstly, the generated solid product is gamma-LiAlO2, and the gamma-LiAlO2 material has good thermal stability and molten carbonate corrosion resistance and can be used as an electrolyte substrate material of an MCFC. According to the gamma-LiAlO2 material prepared by the waste aluminum recycling method disclosed by the invention, the waste aluminum is used for replacing primary aluminum, so that the production cost of the gamma-LiAlO2 material can be greatly reduced, and the gamma-LiAlO2 material can be popularized and applied on a large scale. Secondly, the carbon dioxide is consumed in the reaction process and converted into a carbon monoxide fuel, and carbon emission reduction and cyclic utilization are achieved.

Description

technical field [0001] The invention belongs to the technical field of recycling aluminum waste, and relates to a recycling method for aluminum waste. Background technique [0002] During the production and processing of metal aluminum and the circulation and use of related aluminum products, a large amount of scrap aluminum is produced every year. The following is an example of waste aluminum cans. China’s annual production capacity of waste aluminum cans is about 160,000 to 200,000 tons; although most of the waste aluminum cans are recycled, the recovery rate can reach more than 85%, but recycled waste aluminum It is difficult to reuse cans, and most of them are downgraded for use, and the added value of aluminum resource utilization is greatly reduced. [0003] The traditional processing methods for waste aluminum cans are: through smelting, composition adjustment, filtration, casting and other processes. The traditional processing method is not only complex in process,...

Claims

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Application Information

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IPC IPC(8): C01F7/04C01B32/40C22B7/00
CPCC01F7/043C22B7/001C01B32/40Y02W30/20Y02P10/20
Inventor 李鹏杨墨瞳国宏伟闫炳基陈栋
Owner SUZHOU UNIV
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