Wind Tower Pellet Ring Cooler

Abstract

The invention discloses a wind-tower pellet circular cooler, wherein an air box (4) is directly connected to a cooling stock bin (5) in a sealed manner; a fixed air duct (1) is disposed at an air inlet of a rotary tower (2) and is connected to the air inlet in a movable sealing manner; an air inlet end of an air branch tube (3) communicates with an air chamber of the rotary tower (2), and an air outlet end communicates with an air inlet of the air box (4); an air control valve (10) is disposed on a pipeline; and the rotary tower (2), the air branch tube (3), the air box (4) and the cooling stock bin (5) are successively connected to form an integrated structure and can be rotated together around a gyration center during running. The circular cooler is characterized in that no air leakage point exists at each link, so that sealing problems are thoroughly solved, and the circular cooler is applicable to cooling of direct-reduction pellets. In this way, a lot of residual heat in pellet products can be applied effectively; and the circular cooler plays a significant role in carrying out clean production, saving energy and reducing emission.

Description

technical field [0001] The invention relates to the technical field of metallurgical equipment, in particular to a wind tower type pellet ring cooler. Background technique [0002] The direct reduction ironmaking method is one of the cutting-edge technologies in the iron and steel industry. This technology reduces the ore below its soft melting point to obtain solid metallic iron. The product of this process forms a microporous structure during the reduction process, so it is called sponge iron, and because sponge iron mostly appears in the form of pellets, it is also called direct reduction pellets, or reduction pellets for short, and the reduction pellets contain less impurities. , is the main raw material for the production of high-quality pure steel. [0003] The temperature when the reduced pellets leave the kiln is about 900-1000°C. In order to prevent oxidation in an oxygen-containing environment, the reduced pellets are cooled by a cooling cylinder with better seali...

AI Technical Summary

Problems solved by technology

[0005] Since direct reduction pellets have extremely high sealing requirements, the oxidation pellet annular cooler cannot be directly used to cool the direct reduction pellets. One of the important technical points is that during the cooling process of the material, the oxidation pellet annular cooler It is difficult to ensure the sealing performance of various components such as the air supply system, the ring cooler body, and the hot air collection system, which will cause oxygen in the air to enter the ring cooler, and then oxidize the high-temperature pellets, resulting in the failure of the work task. At the same time, the sealing performance Lack of it will also cause the high-temperature gas inside the ring cooler to leak, resulting in loss of cooling gas and deterioration of the working environment

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