Work

Study on the Recovery of Rubidium from Lepidolite Slag by Sulfuric Acid Leaching

Year: 2025

Type: article

Abstract: The lepidolite slag from Jiangxi contains 0.51% rubidium. Utilizing lepidolite slag in cement production does not enable the efficient recovery of the rubidium it contains. This study investigates the feasibility of extracting rubidium from lepidolite slag through sulfuric acid leaching. The research method involved initially conducting single-factor experiments, followed by the application of response surface methodology to determine the optimal conditions. The optimization results revealed that the leaching rate of rubidium could reach 86.26% under the following conditions: a temperature of 85 °C, a rotational speed of 480 r/min, a sulfuric acid concentration of 3.53 mol/L, a duration of 91.64 min, and a liquid–solid ratio of 5.86. The experimental results closely matched the model’s predicted value of 86.32%. The results demonstrate the effectiveness of the response surface methodology in modeling the rubidium leaching process and provide a reference for the recycling of rubidium from lepidolite slag.

Source: Minerals

DOI: 10.3390/min15030202

Authors: Yuncheng Zhong, Xuebin Peng, Mingliang Yang, Xuefeng Liu, Shichao Wang, Tao Qu

Institutions: Kunming University of Science and Technology, Yunnan Open University

Language: English

Topic: Extraction and Separation Processes

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Responsible consumption and production

Open Access status: gold

Estimated APC paid: $2,896