Shaimerden oxidized zinc ore containing more than 21% wt.% zinc is studied in this work. When the first research on hydrometallurgical processing of this ore was conducted the authors of this research determined the following parameters for ore leaching: the size of ore reduction, sulfuric acid concentration, temperature, and leaching duration. These tests serve as a basis for zinc recovery from the given ore with a size of – 2.5 mm and a regime is recommended providing zinc recovery into solution at the level 93.5%. However, the production regime proposed for sulfuric-acid leaching of this zinc ore requires further development as this process is characterized by inadequate production, high energy consumption for heating leaching pulp, and considerable sulfuric acid consumption. In order to avoid these disadvantages the authors develop a production regime of four-stage sulfuric-acid leaching of Shaimerden ore – 1.0 mm in size. The regime developed in this article provides zinc recovery from ore into solution at the level 94.65% compared with the regime of sulfuric-acid leaching developed previously. At the same time, consumption of sulfuric acid for leaching is reduced by 22%, the leaching period is six times shorter, and energy consumed for heating leaching pulp is lower by approximately a factor of three.

中文翻译：

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富氧化锌矿硫酸浸出新方法

在这项工作中研究了含有超过 21% wt.% 锌的 Shaimerden 氧化锌矿石。在对该矿石进行湿法冶金加工的第一次研究时，该研究的作者确定了以下矿石浸出参数：矿石还原的大小、硫酸浓度、温度和浸出持续时间。这些测试是从给定矿石中回收锌的基础，尺寸为 – 2.5 毫米，建议采用一种方案，使溶液中的锌回收率为 93.5%。然而，该锌矿硫酸浸出的生产方案需要进一步发展，因为该工艺的特点是产量不足，加热浸出浆能耗高，硫酸消耗量大。为了避免这些缺点，作者开发了 Shaimerden 矿石 - 1.0 毫米四级硫酸浸出的生产方案。与之前开发的硫酸浸出方案相比，本文开发的方案提供了 94.65% 的锌从矿石到溶液中的回收率。同时，浸出硫酸消耗量降低22%，浸出周期缩短6倍，加热浸出浆能耗降低约3倍。