A steel slag dry processing equipment

Abstract

The invention provides a steel slag dry processing equipment. The liquid steel slag flows out from the tundish nozzle through the slag guide groove and enters the double-shell processing equipment. It is blown, cut and granulated by high-pressure air and cooled for the first time. It flies in a parabolic trajectory along the spraying direction. Entering the granulation buffer chamber, under the action of the buffer gas, the flight speed of the slag particles is slowed down, and the residence time is increased, so that the slag particles have enough time to undergo a phase change, the surface condenses into a shell and has sufficient thickness to produce sufficient strength; when the slag particles are buffered by the granulation The chamber slides down to the cooling roller mechanism along the inclined bottom plate, and the slag particles are conveyed along the blowing direction through the rollers rotating in the same direction, and are cooled once every time they pass through a roller, and finally fall down through the light slag outlet, and are transported by the conveying equipment The next process of transfer; after the light slag injection, the heavy slag is directly injected, and the heavy slag falls directly into the heavy slag outlet, which greatly shortens the treatment cycle. At the same time, the waste heat appears in the form of hot air, hot water and steam, which is very convenient for industrial use.

Description

technical field [0001] The invention relates to the technical field of liquid molten steel slag processing in the metallurgical industry, in particular to a steel slag dry processing equipment. Background technique [0002] The development of smelting technology in the iron and steel industry needs to upgrade, transform and upgrade the smelting steel slag treatment technology of its components. According to the urgent need of the current steel slag treatment technology, according to the different treatment properties, methods and intermediate heat exchange media, it can be divided into two categories: "dry method" treatment technology and "wet method" treatment technology. The "wet method" treatment technology is a treatment method that completely uses "liquid water" as the cooling medium. The typical one is Baosteel's drum method, which is characterized by a short process and fast speed in the slag treatment process, but the subsequent water treatment system is huge and con...

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Problems solved by technology

[0002] The development of smelting technology in the iron and steel industry needs to upgrade, transform and upgrade the smelting steel slag treatment technology of its components. According to the urgent need of the current steel slag treatment technology, according to the different treatment properties, methods and intermediate heat exchange media, it can be divided into two categories: "dry method" treatment technology and "wet method" treatment technology

The "wet method" treatment technology is a treatment method that completely uses "liquid water" as the cooling medium. The typical one is Baosteel's drum method, which is characterized by a short process and fast speed in the slag treatment process, but the subsequent water treatment system is huge and consumes a lot of water; "Dry processing" technology is divided into "semi-dry" processing technology and "completely dry" processing technology. Water, although it has not reached the level of "wet" treatment technology using liquid water to wash slag, but the process is long, the treatment is slow, the consumption is large, and the pollution caused by the conversion between processes is high

"Wet method" and "semi-dry method" use liquid "water" as the cooling medium, and water will generate water vapor when heated, causing secondary pollution to plant equipment and regional environment

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