Efficient cooling barrel body of reduced iron rotary barrel type cooling machine

Abstract

The invention relates to an efficient cooling barrel body of a reduced iron rotary barrel type cooling machine, and the efficient cooling barrel body is mainly used for cooling reduced iron pellets and sintered pellets in metallurgical mine industry. The efficient cooling barrel body comprises a barrel body (1), a plurality of half cooling pipes (3) and a plurality of round cooling pipes (4), wherein the half cooling pipes (3) are uniformly arranged on the inner wall of the barrel body (1) and fixedly connected with the inner wall of the barrel body (1) to form a plurality of water channels; the round cooling pipes (4) are arranged on the inner side of a circumferential rotary body defined by the half cooling pipes (3); the half cooling pipes (3) and the round cooling pipes (4) are connected with a water supply unit and a water return unit. The half cooling pipes (3) and the round cooling pipes (4) are arranged in the barrel body (1), so that the heat exchange area is effectively enlarged, blending and heat transfer of materials are enhanced, and the efficient cooling barrel body has the advantages of good material cooling effect and small deformation of the barrel body.

Description

technical field [0001] The invention relates to a reduced iron rotary drum cooler, in particular to a high-efficiency cooling cylinder of the reduced iron rotary drum cooler, which is mainly used for cooling reduced iron pellets and sintered pellets in metallurgical and mining industries. Background technique [0002] The temperature of the direct reduced iron pellets at the outlet of the rotary hearth furnace or rotary kiln is as high as 1100°C. Most iron and steel companies use rotary drum coolers to cool the high temperature pellets: the high temperature pellets enter the cooling drum with an inclination through the chute, and are cooled. The cylinder rotates, and the material moves from the feed end to the discharge end; the cooling water is directly sprayed on the outside of the cylinder to achieve the cooling effect. This cooling method has some disadvantages: (1) The heat transfer method is mainly based on the heat conduction between the material and the cylinder and ...

AI Technical Summary

Problems solved by technology

This cooling method has some disadvantages: (1) The heat transfer method is mainly based on the heat conduction between the material and the cylinder and the heat convection between the cooling water and the cylinder, and the comprehensive heat transfer coefficient is relatively low; (2) The cylinder is in the When rotating, the material is easy to slide at the bottom of the cylinder, and the contact heat transfer area between the material and the cylinder is relatively small; (3) The heat of the material needs to be transferred to the cooling water through the cylinder. High body temperature, serious deformation

However, this technology does not improve the material movement inside the cylinder and the heat transfer between the material and the cylinder.

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