Chiết xuất nhôm từ chất thải than bằng phương pháp kích hoạt cơ nhiệt

Springer Science and Business Media LLC - Tập 9 - Trang 216-223 - 2015
Xiaoxue Sun1, Yuzhu Sun1, Jianguo Yu1
1State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, China

Tóm tắt

Quá trình kích hoạt chất thải than (CS) nhằm thu hồi nhôm như một sản phẩm có giá trị cao đã được nghiên cứu. Chất thải than đã được xác định đặc trưng trước bằng phổ huỳnh quang tia X (XRF), nhiễu xạ tia X (XRD) và phân tích nhiệt trọng lượng - nhiệt vi sai (TGA-DSC) để xác định thành phần hóa học và khoáng vật của chất thải than. Sau đó, một phương pháp kích hoạt cơ nhiệt đã được áp dụng để tăng cường hoạt tính nhôm trong chất thải than. Hơn 95% nhôm trong chất thải than có thể được chiết xuất bằng phương pháp kích hoạt này. Quá trình kích hoạt cơ nhiệt đã thúc đẩy sự phá hủy cấu trúc kaolinite và cản trở sự hình thành γ-Al2O3 không kết tinh. Điều này dẫn đến hoạt tính rửa nhôm cao trong chất thải than đã được kích hoạt cơ nhiệt.

Từ khóa

#kích hoạt cơ nhiệt #chiết xuất nhôm #chất thải than #hoạt tính nhôm #phân tích nhiệt

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