Work

Intensifying recovery of metallic aluminum in secondary aluminum dross by alkali roasting−water leaching

Year: 2024

Type: article

Abstract: An innovative process was proposed to recover metallic aluminum from secondary aluminum dross (SAD) by alkali roasting−water leaching. Thermodynamic calculations and experimental results were used to illustrate the phase transformation and reaction mechanism of the alkali roasting process. The leaching behaviors of roasted residue were also analyzed. Under optimal conditions, the aluminum extraction rate reached 93.08%. In addition, the kinetics of the water leaching of roasted products was studied through shrinking core model, and it was revealed that the leaching process of aluminum was in accord with diffusion control. The apparent activation energy of the leaching process was calculated to be 3.44 kJ/mol. Based on the above study, the underlying mechanism of the alkali roasting−water leaching was clarified.

Source: Transactions of Nonferrous Metals Society of China

DOI: 10.1016/s1003-6326(24)66658-6

Authors: Chen LI, Wei LIU, Fen JIAO, Liang-min DONG, Shi-yang LIU, Wen-qing QIN

Institution: Central South University

Language: English

Topic: Extraction and Separation Processes

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Responsible consumption and production

Open Access status: diamond

Funders: National Natural Science Foundation of China, Central South University, National Key Research and Development Program of China