Converter molten red slag sensible heat recovery device and afterheat recovery method

Abstract

The invention discloses a converter molten red slag sensible heat recovery device and an afterheat recovery method. The device comprises a charging opening dust collecting cover, a vertical cooling device, a desorption agent spraying coating device, a slag disintegrating sealing chamber, a cold air pipeline system, a hot air pipeline system, an afterheat boiler heat exchange device and a return air pipeline system; the charging opening dust collecting cover is arranged above a charging opening of the vertical cooling device; the desorption agent spraying coating device is arranged at the upper end of the vertical cooling device and communicates with the interior of the vertical cooling device; the slag sealing chamber sealing chamber is formed below a discharging opening of the vertical cooling device; a vapour-water pipeline system of the vertical cooling device communicates with the slag disintegrating sealing chamber; the hot air pipeline system and the cold air pipeline system communicate with the vertical cooling device; and the hot air pipeline system is connected with the return air pipeline system through the afterheat boiler heat exchange device. According to the converter molten red slag sensible heat recovery device and the afterheat recovery method, quick cooling of molten slag, gradient utilization of temperature, a continuous afterheat recovery process, high automation degree of device operation, energy conversation, and emission reduction are realized, and meanwhile, the economy of subsequent comprehensive utilization of converter molten slag is met.

Description

technical field [0001] The invention relates to the field of waste heat recovery of sensible heat of high-temperature molten red slag, a by-product of a smelting process in the iron and steel smelting industry or non-ferrous smelting industry, in particular to a recovery device and a waste heat recovery method for molten red slag sensible heat of a steelmaking converter. Background technique [0002] Converter slag is a by-product of the converter steelmaking process, which concentrates the oxides and sulfides formed after the iron and steel smelting raw materials are oxidized. In the steelmaking process, the converter slag produced per ton of converter steel is 80-120kg. It can be seen that the converter slag is the main waste in the iron and steel metallurgical industry, and the annual discharge is very large. [0003] A large amount of high-temperature molten slag produced in the steel production process has a temperature as high as 1300-1600°C, and the specific heat of t...

AI Technical Summary

Problems solved by technology

In the existing domestic molten slag treatment process, the cooling process of steel slag is mainly based on water cooling, and a large amount of harmful steam is generated during the cooling process, and the steam pressure is low, the quality is low, it is difficult to use it, and it is scattered into the atmosphere, which pollutes the environment. , and consume a lot of water resources

Therefore, none of the existing domestic steel slag treatment processes can realize the recovery and utilization of liquid slag sensible heat, but only consider the comprehensive utilization of the extraction of elemental iron and tailings minerals

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