Recycling of copper flue dust via leaching-solvent extraction processing

Abstract

A laboratory/bench scale investigation relating the copper recovery from a Chilean copper flue dust is described. Since the dust contained a high amount of copper (near 24 %), the considered option consists in the leaching of the metallic material with ammonium chloride solution, thus enabling the dissolution of copper via either of its ammoniacal complexes, and also rendering, due to the almost neutral conditions of the leaching solution, a near complete lean solution with respect to the presence of other copper metal-accompanying in the dust. Copper enters the solvent extractionelectrowinning circuit due to the next equilibrium:

Application of Response Surface Methodology for Optimization of the Biosorption Process from Copper-Containing Wastewater

“…We selected adsorbtion to treat copper-containing wastewater due to its advantages, such as low initial cost and process simplicity [ 6 , 7 ]. However, the instability of the adsorbents and difficulty in the separation still limit their practical applications.…”

Development of a Sustainable Metallurgical Process to Valorize Copper Smelting Wastes with Olive Stones-Based Biochar

“…Several treatments have been reported for the refining of these flue dusts, which can be categorized into hydrometallurgical or pyrometallurgical treatments. Regarding the hydrometallurgical treatments, leaching using different reagents (water, acid or alkaline) [2][3][4][5][6][7][8] is the most studied process; but a combination of roasting and leaching [9,10] has been also investigated. In the case of pyrometallurgical treatments, a Waelz process followed by a hydrometallurgical process can be found [11].…”