Zinc smelting technology for low-zinc high-iron roasting ore by wet method

Abstract

The invention relates to a zinc smelting technology for a low-zinc high-iron roasting ore by a wet method. The technology comprises a leaching process, a purifying process and an electrolyzing process. The technology employs a smelting method that a wet method can solve the problem of lean impurity high-iron raw material, iron removal efficiency is high, and various production consumption and production cost are not increased. The quality of 58% qualified high-purity zinc is greater than or equal to 99.995%, and quality of 42% qualified high purity zinc is greater than or equal to 99.99%.

Description

technical field [0001] The invention relates to a wet zinc smelting process of low-zinc and high-iron roasted ore. Background technique [0002] In recent years, with the acceleration of the industrialization process and the continuous development and expansion of the zinc smelting industry, zinc-containing raw materials at home and abroad have become increasingly scarce, and the quality of zinc raw materials has gradually declined. After decades of mining and smelting, mineral resources have continued to decrease and Exhausted, the ore grade continues to decline, increasing the difficulty of smelting. In this situation, the raw materials of low-grade high-speed iron are paid more and more attention to and used. Therefore, the development and research of smelting technology for low-grade high-speed iron raw materials is imperative. [0003] High-temperature and high-acid leaching of high-iron-zinc roasted ores was developed in the late 1960s with the successful development ...

AI Technical Summary

Problems solved by technology

However, there are also some disadvantages, such as the need to consume alkali, low iron content in slag, large amount of slag and poor storage performance of slag, which is not conducive to environmental protection. Aiming at the shortcomings of the conventional jarosite method, a new type of low-pollution The jarosite method, that is, no neutralizing agent is added during the precipitation process, which reduces the loss of valuable metals in the slag and improves the environmental pollution of the alum slag. The basic principle is to adjust the composition of the solution before the jarosite precipitation. Satisfactory iron removal effect can be achieved without adding neutralizer in the alum sinking process, which can be achieved by low temperature pre-neutralization or using neutral leaching solution as diluent, or a combination of both