COLLOID-CHEMICAL PROPERTIES OF COAL AND COAL ASH PROCESSING AND THE EXTRACTION OF METAL COMPOUNDS
Authors
Kucharov Azizbek, Khalilov Sanjar, Yusupov Farkhod
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Coal ash contains economically valuable metal oxides such as aluminum, iron, titanium, and others, making their extraction a key focus of modern industrial technologies. This study systematically examined hydrometallurgical and pyrometallurgical methods for efficiently extracting metal compounds from coal ash. Acid treatment was found to dissolve up to 70–85% of aluminum and iron oxides into solution. Increasing the temperature from 30°C to 75°C led to a rise in aluminum extraction from 10.0% to 23.5%. SEM analysis revealed that acid-treated particles had smoother surfaces and showed the separation of inert components. Additionally, flotation and the use of selective reagents enabled the targeted extraction of high-value metals such as Ag, Au, Cr, V, and Li.
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Authors
Kucharov Azizbek, Khalilov Sanjar, Yusupov Farkhod
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