Metallurgical molten slag dry-type processing device and processing method thereof

Abstract

The invention discloses a metallurgical molten slag dry-type processing device and a molten slag dry-type processing method. The processing device comprises a molten slag lead-in unit and a processing furnace, wherein the processing furnace comprises a granulating cooling nozzle, a multi-section fluidized bed device for secondarily cooling hot slag particles, a slag discharging pipe which is arranged nearby a multi-section fluidized bed top layer fluidized plate and is used for accidental maintenance and a rotary sealing valve which is arranged at a discharging outlet below the multi-section fluidized bed; in the processing furnace, the rapid granulating and cooling of the molten slag are completed inside a drum area on the upper part of the furnace body, the secondary cooling of the falling hot slag particles is completed through multi-section circular heat exchange with the ascending gas from the multi-section fluidized bed inside the multi-section fluidized bed, so the rapid granulating and the cooling of the molten slag as well as the secondary cooling of the hot slag particles can be continuously completed inside one processing furnace. The dry-type processing device reduces the heat loss of the system, improves the total recycling efficiency of the molten slag heat, and improves the installation feasibility near the main smelting device since the land occupation area is reduced.

Description

technical field [0001] The invention relates to a metallurgical slag dry processing device, which is used for granulating and cooling the metallurgical slag to achieve the purpose of recycling sensible heat in the slag. In addition, the invention also relates to a dry processing method for metallurgical slag. Background technique [0002] A large amount of slag produced in the existing metallurgical process is usually treated by water quenching process. In addition to consuming a large amount of precious water resources, most of the sensible heat in the slag is lost with the evaporation of water, so the sensible heat in the slag Basically not recycled. In order to recycle the sensible heat in the high-temperature slag and avoid the waste of water resources, since the 1980s, people began to study various dry treatment processes of slag. Since the thermal conductivity of metallurgical slag is very low (<1W / mk), in order to improve the recovery efficiency of sensible heat ...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to aim at the disadvantages of low heat recovery efficiency and large equipment footprint in the dry processing device of the wind quenching granulation method that has been studied, and improve the apparent efficiency of slag through a more reasonable dry processing device and processing method. Heat recovery efficiency and reduced equipment footprint

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