A method for recovering zinc enrichment and potassium chloride by using rotary hearth furnace dust

Abstract

The invention discloses a method for recycling zinc-enriched objects and potassium chloride through rotary hearth furnace dust. The method comprises the following steps of pretreatment, slurrying, leaching and extracting, solid-liquid separating, cleaning and drying. By means of the method, the problem that the collected dust of a rotary hearth furnace of an iron and steel enterprise is difficult to treat is effectively solved. According to the method, the process steps are simple, the recycling rate of the zinc-enriched objects is high, resource regeneration is achieved, and the waste is turned into treasure; and a circulation production line can be formed in the iron and steel enterprise, and a large amount of production cost is reduced.

Description

technical field

[0001] The invention belongs to the field of dust treatment of rotary hearth furnaces in iron and steel enterprises, and in particular relates to a method for recovering zinc enrichment and potassium chloride by utilizing the dust of rotary hearth furnaces. Background technique

[0002] The use of dust collected by rotary hearth furnaces in iron and steel enterprises has always been a research topic at home and abroad. Using rotary hearth furnaces to treat waste produced by iron and steel enterprises is an important application direction of direct reduction technology in recent years. Because of its economy, applicability and environmental protection, it has been rapidly promoted and applied at home and abroad. Rotary hearth furnace dust collected from gas mud (ash) mainly contains valuable components such as zinc and alkali metal salts. How to realize the separation and complete recycling of these valuable components is a goal that iron and steel enterprise...