Hydrochloride extraction processing of zinc clinker

Abstract

Data on the mineral, phase, and elemental compositions of a zinc clinker as zinc production waste have been given and the possibility of hydrometallurgical processing using HCl solutions has been investigated. The kinetics of the clinker interacting with HCl solutions of 50–200 g/L in the temperature range of 50–90°C has been studied. The high efficiency of the muriatic acid for the decomposition of both the magnetic fraction and the general clinker sample with the 95–99% extraction of iron and nonferrous metal in solution and the more than 3.5-fold reduction in the clinker mass have been determined. The possibility of processing the filtrate extraction from the decomposition of the clinker by HCl using 100% tributyl phosphate as an extracting agent while obtaining oxide product containing >97% Fe suitable for producing iron-oxide pigment has been shown.