EVALUATION OF THE ABILITY TO SEPARATE COPPER FROM MOBILE PHONE WASTE BY PYROMETALLURGICAL PROCESS COMBINED WITH HYDROMETALLURGICAL PROCESS

Nguyễn Thị Hồng Hoa; Nguyễn Thị Huệ; Bùi Minh Quý; Nguyễn Thị Ngọc Linh

doi:10.34238/tnu-jst.5851

EVALUATION OF THE ABILITY TO SEPARATE COPPER FROM MOBILE PHONE WASTE BY PYROMETALLURGICAL PROCESS COMBINED WITH HYDROMETALLURGICAL PROCESS

About this article

Received: 14/04/22 Revised: 14/07/22 Published: 14/07/22

Authors

1. Nguyen Thi Hong Hoa , TNU - University of Sciences
2. Nguyen Thi Hue, Vocational Education – Continuing Education Center Tien Du, Bac Ninh
3. Bui Minh Quy, TNU - University of Sciences
4. Nguyen Thi Ngoc Linh, TNU - University of Sciences

Abstract

The recovery of metals in mobile phone waste is a matter of concern due to environmental issues and the increasingly depleted metal resources. There are many methods to separate metal from mobile phone waste such as: pyrometallurgical method, hydrometallurgical method, electrometallurgical method.... Promoting the advantages of pyrometallurgical method and hydrometallurgical method, the article presents a copper separation process that minimizes the release of harmful gases to the environment, but effectively recovers copper, which is a combination of pyrometallurgical method and hydrometallurgical method. Pyrometallurgical stage: mobile phone waste is chopped and calcined at 750 ^oC in a closed furnace that can recover the released gas in 2 hours. Hydrometallurgical stage: the solid is dissolved in a solution of sulfuric acid (H₂SO₄) in the presence of hydrogen peroxide (H₂O₂). The factors affecting the copper separation process were studied such as H₂SO₄ concentration, H₂O₂ concentration, solid/liquid ratio and temperature showing that H₂SO₄ 4M, H₂O₂15%, solid-liquid ratio 0.025 and the temperature 40 ^oC, the copper (II) sulfate (CuSO₄) solution obtained has a high concentration with separation efficiency of 71.64% after 1 hour.

Keywords

Mobile phone waste; Pyrometallurgical process; Hydrometallurgical process; Copper; Separation process

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DOI: https://doi.org/10.34238/tnu-jst.5851

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