A kind of method of recycling aluminum and aluminum slag to produce alumina

A technology of aluminum ash slag and alumina, which is applied in the field of recycled aluminum ash slag to produce alumina, can solve the problems of ineffective acid leaching treatment, long acid leaching time, and increased dosage, so as to reduce time, The effect of shortening the time and reducing the working time
CN108383142BActive Publication Date: 2020-08-04SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
Publication Date
2020-08-04

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Abstract

The invention discloses a method for resource production of aluminum oxide by aluminum ash residues of recycled aluminum. The method comprises the following steps: grinding and cleaning the aluminum ash residues; performing low-temperature alkaline smelting; performing water leaching, and removing impurities of a leaching liquid; introducing excessive CO2 to obtain an aluminum hydroxide precipitate; and performing high-temperature roasting. Cleaning apparatus used in the method comprises a shell, a shaking device, a grinding device, a cleaning device, drying devices and a heating device; the shell comprises a grinding chamber and a cleaning chamber; the shaking device is arranged at the upper end of the grinding chamber; the grinding device is arranged in the grinding chamber; the cleaningdevice is arranged in the cleaning chamber; the two drying devices are separately arranged on the left and right sides of the upper end of the cleaning chamber; and the shaking device, the grinding device, the cleaning device, the drying devices and the heating device are controlled by an automatic PLC. The method provided by the invention has higher efficiency, shorter time and a higher resourceutilization degree.
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Description

technical field

[0001] The invention relates to the technical field of metal recovery and utilization, in particular to a method for recycling aluminum and aluminum ash to produce alumina. Background technique

[0002] At present, my country's aluminum products mainly come from the smelting of bauxite (primary aluminum) and the regeneration of waste aluminum (recycled aluminum). Among them, primary aluminum requires high-intensity mining and consumption of bauxite resources, and its reserves have been difficult to meet the needs of aluminum and aluminum. There is a huge demand for aluminum alloys; and recycled aluminum adopts the model of "resources-production-consumption-renewable resources", using waste aluminum as raw material, and producing metal aluminum through pretreatment, melting, refining, casting and other processes, making aluminum a kind of Resources that can be recycled. Compared with primary aluminum, recycled aluminum has the advantages of simple process, low ...

Claims

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