Current Status of Magnesium Smelting and Recycling Technology

Recycling processes of spent copper wires cosisnt of several steps of cutting and chopping processes for peeling covering materials followed by gravity separation processes, where copper is recovered. Because copper thin wires could be lost during further recycling processes, the wire may need to be further treated. In the present study, the copper thin wire was treated with ball milling to prevent the loss. Since the aggregation of the copper wire could be formed by bending and entangling the copper wire each other, the degree of flexion of the copper wire was measured after ball milling. When the 0.5 cm and 3 cm copper wires were used, the 0.5 cm copper wire was not bent and the 3 cm copper wires were aggregated regardless of the ball addition. When the 1 cm and 2 cm copper wires were used, the degree of flexion was remarkable when the balls were added. In the tests using 2 cm copper wires, the aggregation ratio of the copper wire gradually increased with the amount of the 20 mm alumina ball, and when 200 ml of 30 mm alumina ball was used, the aggregation ratio increased to 89.29 %, but after increasing the ball amount further, the aggregation ratio decreased. Thus, it is expected that the loss of the copper wire could be reducedif when the copper thin wire is treated with ball milling by the aggregation of copper thin wires.

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Study for Seperation Process of Copper from the Low-grade Copper Ore by Hydrometallrugical Process

Shin¹,

Joo²,

Lee

et al. 2021

Resour. Recycl.

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In this study, we attempted to separate and recover Cu from low-grade copper ore by a hydrometallurgical process. The leaching sample obtained after crushing and sieving by 0.355 mm of low-grade copper ore contained 1.5% Cu, 4.7% Fe, 1.0% Mn, and 0.3% Zn. The Cu in the oxide ore was very well leached into sulfuric acid and 97% Cu leaching efficiency was achieved at 80°C and 3 M sulfuric acid (H 2 SO 4 ). From the leaching solution, Cu was separated by solvent extraction from Fe, Mn, and Zn using LIX984N. The separation tendency between Cu and other metals was confirmed through the distribution ratio and separation factor. By plotting the McCabe-Thiele Diagram, the optimum condition for recovering Cu is 5 vol.% LIX984N, 2-stage counter-current solvent extraction, and an O/A ratio of 0.5. Using this method, 99% of the Cu was extracted and a CuSO 4 solution was finally obtained that contained 1.6 g/L Cu after the stripping process using 2 M H 2 SO 4 .

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Current Status of Magnesium Smelting and Recycling Technology

Cited by 4 publications

References 13 publications

The Gravity Separation of Speiss and Limestone Granules Using Vibrating Zirconia Ball Bed

The Gravity Separation of Speiss and Limestone Granules Using Vibrating Zirconia Ball Bed

Aggregation of Thin Copper Wire by Ball Milling Treatment

Study for Seperation Process of Copper from the Low-grade Copper Ore by Hydrometallrugical Process

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