A closed-circuit circulation iron and steel sintered red ore cooling device and its technological method

Abstract

The invention discloses a closed-loop steel sintered red ore cooling device. The device comprises a device body, a heat exchange cavity arranged in the device body, a feeding inlet formed in the upper end of the device body, a uniform distributor arranged at the lower end of the feeding inlet, a discharging outlet formed in the lower end of the body, a uniform temperature device and at least one fire grate. The uniform temperature device is arranged on the device body and communicates with a cold air outlet. The at least one fire grate is movably installed in the heat exchange cavity. Each fire grate and the heat exchange cavity form an obliquely-downward angle, and the fire grates are parallel to each other. A pushing device is arranged at the front end of each fire grate. A hopper is arranged at the tail end of each fire grate. The device replaces a cooling section of an original sintering machine or a ring cooling machine. Compared with an original cooling mode, the device is high in yield, good in quality and low in energy consumption. Compared with the original cooling mode, the yield of a marching type sintering machine can be increased by 30%-40%, zone firing is increased by 5%-10%, and energy consumption only accounts for about 50% of the original cooling mode.

Description

technical field [0001] The invention belongs to the field of thermodynamics, and in particular relates to a closed-circuit circulation iron and steel sintered red ore cooling device and a process method thereof. Background technique [0002] At present, there are mainly two types of sintering machines in my country's iron and steel industry, one is a step-by-step sintering machine, and the other is a belt-type sintering machine. [0003] The structure of the walking sintering machine consists of two parts: a sintering section and a cooling section. The cooling time is short, the cooling effect is not good, and even red ore is produced, so that the quality of the sintering ore cannot be guaranteed, and it has adverse effects on belt transportation and ore screening. At the same time, affected by the sealing structure of the step-by-step sintering machine, the air leakage rate of the sintering machine is very high, which can reach more than 50%, which requires a large amount o...

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Problems solved by technology

[0003] The structure of the walking sintering machine consists of two parts: a sintering section and a cooling section. The cooling time is short, the cooling effect is not good, and even red ore is produced, so that the quality of the sintering ore cannot be guaranteed, and it has adverse effects on belt transportation and ore screening. At the same time, affected by the sealing structure of the step-by-step sintering machine, the air leakage rate of the sintering machine is very high, which can reach more than 50%, which requires a large amount of air for cooling, consumes a lot of energy, and is difficult to recycle

[0004] Belt-type sintering machines are generally cooled by ring coolers. Ring coolers are also affected by the sealing structure. The air leakage rate of the sintering machine is over 50%, which requires a large amount of air for cooling, consumes a lot of energy, and causes recycling. difficult question

[0005] At present, the waste heat recovery of sintering machines in my country's iron and steel industry can only reach 10-18 degrees per ton of ore, and the heat extraction is low and cannot be fully utilized.

At the same time, a large amount of smoke is discharged outside, which produces a large amount of carbon emissions and pollutes the environment

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