Method for removing iron from iron-containing zinc sulfate solution

Abstract

The invention discloses a method for removing iron from an iron-containing zinc sulfate solution. The method comprises the following steps: supplying the iron-containing zinc sulfate solution to a vertical reaction kettle, and introducing steam and oxygen into the vertical reaction kettle so as to perform primary iron removal treatment in the vertical reaction kettle to obtain first iron-removed slurry; supplying the first iron-removed slurry to a horizontal reaction kettle, and introducing steam and oxygen to the horizontal reaction kettle so as to perform secondary iron removal treatment in the horizontal reaction kettle to obtain second iron-removed slurry. According to the method of removing iron from the iron-containing zinc sulfate solution disclosed by the embodiment of the invention, the vertical reaction kettle and the horizontal reaction kettle are combined for use so as to effectively solve the production interruption caused by the problems of scaling in the kettles in the iron removal process and ensure the continuous and stable operation of production, thereby significantly improving the iron removal efficiency and the equipment utilization rate.

Description

technical field [0001] The invention belongs to the fields of chemical industry and metallurgy, in particular, the invention relates to a method for removing iron from an iron-containing zinc sulfate solution. Background technique [0002] Iron usually enters the solution in the form of impurities in the zinc hydrometallurgy process. In order to obtain a purer zinc product, the iron precipitation in the solution will be removed before the product recovery process during the smelting process. The commonly used methods are neutralization method, goethite method, goethite method and iron oxide method, wherein the neutralization method, goethite method, goethite method iron removal slag iron content is low, iron slag is usually stored in tailings ponds, iron oxide method The obtained product can be used as a raw material for cement and ironmaking or to produce iron red products due to its high iron content, which can not only solve the problem of environmental pollution, but als...

AI Technical Summary

Problems solved by technology

For this reason, an object of the present invention is to propose a kind of method that iron-containing zinc sulfate solution is carried out iron removal, and this method can effectively solve the production interruption that causes because scaling etc. At the same time, it can not only effectively solve the problems of iron slag tailings pond occupation and environmental pollution, but also effectively improve the recovery rate of metal zinc and increase the economic benefits of enterprises

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