Method and device for recovering sensible heat of blast furnace slag

Abstract

The invention provides a method for recovering sensible heat of blast furnace slag and a device for realizing the method. In the method for recovering sensible heat of blast furnace slag, sensible heat of blast furnace slag is recovered as chemical energy for pyrolytic reaction of a printed circuit board substrate, thereby avoiding wasting water resources; and thus, the invention has the advantage of high recovery rate of sensible heat of blast furnace slag, solves the problems of high consumption of water and low recovery rate of sensible heat in the existing water quenching treatment process for blast furnace slag, avoids the problem of secondary energy consumption in the pyrolytic treatment of the printed circuit board substrate, can be used for industrial treatment of printed circuit board substrate materials in electronic waste, and is beneficial to realizing energy saving and emission reduction. In addition, the obtained gas products and solid residues can be further utilized, and thus, the product utilization ratio is high. The device for recovering sensible heat of blast furnace slag comprises a pyrolyzing furnace, a dry-type granulating device, a powder container and a gas collection container. The device for recovering sensible heat of blast furnace slag has the advantage of simple structure, is easy to operate and is suitable for industrial application.

Description

technical field [0001] The invention relates to the technical fields of metallurgical engineering and energy recovery, in particular to a method for recovering and utilizing sensible heat of blast furnace slag, and a device for realizing the method. [0002] Background technique [0003] The metallurgical industry is an industry with high energy consumption and high emissions. Blast furnace slag is the main by-product of blast furnace ironmaking, with a temperature as high as 1400-1550°C, containing a large amount of sensible heat, and is a good secondary resource. However, due to the lack of efficient and reliable dry-type sensible heat recovery technology, my country currently mainly adopts the traditional water quenching process for the blast furnace slag produced in the blast furnace ironmaking process, resulting in a large loss of sensible heat contained in the blast furnace slag and low recovery efficiency. Taking 2009 as an example, the output of blast furnace pig i...

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Problems solved by technology

[0006] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to solve the problems of large water consumption and low recovery rate of sensible heat in the existing blast furnace slag treatment method, and provide a method that does not need to consume water resources and has a higher recovery rate of sensible heat. A method for recycling sensible heat of blast furnace slag; in addition, the present invention also provides a device for recycling sensible heat of blast furnace slag to realize the aforementioned method

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