Assessing the Feasibility of Utilizing a Method for Processing Oxidized Zinc Ores

Raigul Ramazanova1

Natalya Seraya1,Email

Gulzhan Daumova1

Aksaule Mamayeva2

Bekzat Saurbayeva1

Zhanat Idrisheva1

1D. Serikbayev East Kazakhstan Technical University, Oskemen 070001, Kazakhstan.
2Institute of Metallurgy and Ore Beneficiation, Almaty 050010, Kazakhstan.

Abstract

To address the challenge of depleting reserves of sulfide ores, we investigated an efficient four-stage countercurrent sulfuric acid leaching method for oxidized zinc mineral processing. This recommended approach enables the achievement of a zinc content in the target solution of 61.55 g/dm3 concentration and zinc extraction efficiency from the ore into the sulfate solution of approximately 95.00%. The specific consumption capacity of sulfuric acid for ore leaching amounted to 0.56 g/g ore. Comparing the developed method with the direct-flow method, it allows for a 12.5% reduction in sulfuric acid consumption. Optimal parameters for the proposed leaching method were selected for the studied ore. Throughout the entire experiment, a solid-to-liquid phase was maintained at a ratio of 1:4 with the initial ore, at a temperature of 40°C for the first three stages of leaching and 25°C for the fourth and final stage. The concentration of sulfuric acid solutions at the first three stages were 98 g/dm3, 28 g/dm3, and 14 g/dm3 respectively, while the fourth stage treatment was carried out with water. Each leaching stage had a duration of 10 minutes. Based on our experimental studies, we have developed the fundamental process scheme for the four-stage countercurrent sulfuric acid leaching of oxidized zinc ore.

Assessing the Feasibility of Utilizing a Method for Processing Oxidized Zinc Ores