Kiln slag processing technology of zinc volatilizing kiln

Abstract

The invention relates to a kiln slag processing technology of a zinc volatilizing kiln, which is characterized by comprising the technological steps of crude crushing and prescreening, medium crushing and fine crushing, two-section and three-stage magnetic separating Fe fined powder, four-stage magnetic separating and re-separating carbon refined powder by an air medium. The invention has the advantages of simple technology, high production efficiency, stable product quality and low energy consumption and enhances the utilization rate of resources, the Fe content of the finally separated Fe refined powder can be about 60%, and the Fe refined powder according with the national requirements can be separated without secondary processing.

Description

technical field [0001] The invention relates to an all-dry beneficiation technology, in particular to a zinc volatilization kiln slag processing technology. Background technique [0002] With the continuous improvement of the level of zinc smelting technology in my country, the properties of zinc slag are also changing, and there are more and more types of zinc slag, and the properties are becoming more and more complex. , sorting, dehydration process) has been difficult to adapt to this compound smelting process. At the same time, the major non-ferrous metal smelters in my country not only consume a large amount of mineral resources but also generate a large amount of solid waste in the process of zinc smelting, which seriously pollutes the environment, especially in the Huludao zinc smelter in Liaoning and the Zhuzhou smelter in Hunan. . In view of the increasing pressure on environmental protection, the increase in processing and dumping costs, and the massive dumping aft...

AI Technical Summary

Problems solved by technology

[0007] The above-mentioned kiln slag treatment process uses a combination of dry and wet methods. Wet purification is carried out on the basis of dry pre-selection. The front stage does not require water resources, and the latter stage requires a lot of water resources, which not only increases the complexity of the process. , and a waste of water resources, especially in the case of circulating water infiltration of the surface, causing secondary pollution of the environment

At the same time, when the magnetic substances in the zinc slag are recovered by magnetic separation, the magnetic separation process used is short, and the process cannot be conveniently and effectively replaced according to the magnetic difference of the kiln slag. The concentrate recovery rate and grade cannot be improved, and the ore dressing efficiency is low

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