Steel slag dry processing and waste heat recovery and power generation method

Abstract

The invention relates to a molten steel slag dry processing and waste heat recovery and power generation method. According to the method, a cooling mode using a large amount of water in wet processingis completely abandoned, sealed equipment is used, air is used as a medium so as to perform dry processing on high-temperature steel slag, the steel slag is cut and granulated by an air knife in thesealed equipment, solid-gas waste heat exchange is completed at the same time, the steel slag is cooled, waste heat is carried by hot smoke after heat exchange so as to enter a waste heat boiler afterbeing dedusted, and then gas-liquid heat exchange is completed so as to obtain saturated steam which can be used for supplying heat, drying and generating power. By adopting the method, the problemsof waste of heat resources, high consumption of water resources and dust blowing in the wet processing can be solved, the method is suitable for reforming steel slag processing lines of existing coldabandon methods, hot splashing methods, water granulation methods, air granulation methods, hot stuffy methods and the like, short for a two-step air brittle method, and the method is a novel technique of completely utilizing three resources including steel slag, waste heat and tailings in a comprehensive utilization technique of smelting steel slag resources at present.

Description

technical field [0001] The invention relates to the treatment of metallurgical molten steel slag and the utilization of waste heat. Background technique [0002] Currently known smelting steel slag treatment methods include cold disposal method, hot pouring method, box-type hot pouring method, water quenching method, wind crushing method, hot stuffing method, hot stuffing tank method, drum method, etc. Among them, the drum method, the hot stuffing method, the water quenching method, and the wind crushing method all belong to the "wet" processing range of cooling steel slag with a large amount of water. The cold disposal method, hot splash method, box-type hot splash method, and hot stuffy tank method reduce the water consumption by nearly half compared with the "wet" treatment, and belong to the "semi-dry" treatment range. Regardless of the "wet method" or "semi-dry method", the cooling medium is "water". After use, a separate water treatment system needs to be set up. How...

AI Technical Summary

Problems solved by technology

However, the fine powder in the tailings is prone to chemical reactions under the mixing action of water, precipitation, compaction, and blockage of the water treatment system

However, due to the rise and rise of hot and humid steam in the workplace, severe dust is generated, which will corrode the plant structure and production equipment, accelerate aging, cause environmental pollution in the operating area, and deteriorate the environment.

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