Slag combined centrifugal gas quenching granulation device and method with heat protection function

Abstract

The invention discloses a slag combined type centrifuging and air quenching granulating plant with a thermal protection function and a method. The slag combined type centrifuging and air quenching granulating plant with the thermal protection function comprises a slag storage bin, a material injecting pipe, a granulating bin and a slag outlet, wherein the material injecting pipe is located on the lower portion of the slag storage bin, and the slag outlet is formed in the lower portion of the granulating bin; the slag combined type centrifuging and air quenching granulating plant with the thermal protection function is characterized in that a centrifuging and air quenching granulator is arranged inside the granulating bin, the centrifuging and air quenching granulator is located below the material injecting pipe, the top of a hollow rotating shaft is fixedly sleeved with the centrifuging and air quenching granulator, a sealing part is sleeved with the bottom of the hollow rotating shaft, the hollow rotating shaft communicates with an air outlet of a draught fan through the sealing part, and the hollow rotating shaft is driven by a motor; and a plurality of fins are arranged on the surface of the centrifuging and air quenching granulator 4, a plurality of air-quenching-wind nozzles communicating with the inner portion of the centrifuging and air quenching granulator are arranged on the periphery of the top of the centrifuging and air quenching granulator in the circumferential direction, and the air inlets of the air-quenching-wind nozzles are located at the inner side of the centrifuging and air quenching granulator. The slag combined type centrifuging and air quenching granulating plant with the thermal protection function can be widely applied to the fields of steel, metallurgy and the like.

Description

technical field [0001] The invention relates to a molten slag granulation device and method, in particular to a molten slag combined centrifugal gas quenching granulation device and method with thermal protection function. Background technique [0002] A large amount of high-temperature slag is produced in the process of blast furnace ironmaking. The traditional high-temperature slag water quenching process can quickly cool the slag, and the obtained slag particles with high glass content can be used as high-quality cement additives. However, this method will cause the waste heat of the slag to be insufficient Recycling, water waste, environmental pollution and other issues. In order to solve many shortcomings of the high-temperature slag water quenching treatment process, domestic and foreign scholars have proposed a variety of high-temperature slag dry treatment methods. The common idea is to use physical methods to granulate high-temperature slag to obtain fine particles,...

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Problems solved by technology

However, in the current centrifugal granulation technology, there are still industrial application bottlenecks such as large amount of slag wool, low granulation quality and efficiency, and high-temperature corrosion caused by long-term operation of the granulator, which need to be solved urgently

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