Furnace slag granulation system with automatic cleaning function

Abstract

The invention relates to a furnace slag granulation system with an automatic cleaning function. The furnace slag granulation system comprises a slag tank, a slag gap adjusting device and a granulation device; an opening is formed in the bottom of the slag tank; the slag gap adjusting device includes a first roller and a second roller; a gap is formed between the first roller and the second roller to form a slag gap; the slag gap is positioned rightly below the bottom opening of the slag tank; the first roller and / or the second roller can move in the horizontal direction; the first roller and the second roller rotate in the furnace slag incoming direction, and are opposite in rotating direction; the granulation device is arranged below the slag gap adjusting device, and is provided with a spraying outlet; the spraying outlet of the granulation device is towards the lower side of the slag gap; and the granulation device is a high-pressure spraying device. The system is simple in structure and small in size, is simple in operation and high in reliability when granulating slag, is ideal in granulation effect, realizes automatic cleaning in the granulation process, and largely reduces the equipment investment and operation costs.

Description

technical field [0001] The invention relates to the field of high-temperature slag granulation, in particular to a slag granulation system with automatic cleaning function. Background technique [0002] Blast furnace ironmaking in the metallurgical industry produces a large amount of high-temperature liquid slag. At present, the water quenching method is mainly used to treat the slag. This method consumes a large amount of water during the treatment process, and a large amount of H will be produced during the treatment process. 2 S and SO x and other harmful gases, causing serious environmental pollution. The dry granulation that has appeared so far is more representative of the wind quenching method and the centrifugal method. The wind quenching method uses a high-power granulation fan to generate high-speed airflow to blow off and granulate the liquid blast furnace slag, which consumes a lot of power and has huge and complicated equipment. , large area, high investment ...

AI Technical Summary

Problems solved by technology

[0002] Blast furnace ironmaking in the metallurgical industry produces a large amount of high-temperature liquid slag. At present, the water quenching method is mainly used to treat the slag. This method consumes a large amount of water during the treatment process, and a large amount of H will be produced during the treatment process. 2 S and SO x and other harmful gases, serious environmental pollution

The dry granulation that has appeared so far is more representative of the wind quenching method and the centrifugal method. The wind quenching method uses a high-power granulation fan to generate high-speed airflow to blow off and granulate the liquid blast furnace slag, which consumes a lot of power and has huge and complicated equipment. , large area, high investment and operating costs, when the flow of liquid blast furnace slag changes, the wind speed and air volume are not easy to coordinate

The centrifugal method relies on the centrifugal force generated by the high-speed rotation of the turntable or cup to granulate the liquid blast furnace slag. The particle size distribution of the granulated slag is relatively uniform, but the reliability of the granulation device rotating at high speed at high temperature is poor, and the granulation effect It is sensitive to the temperature and flow changes of liquid blast furnace slag, and the effect of adjusting the speed alone is not ideal

[0003] Due to the cohesiveness of the slag, it will inevitably stick to the equipment during the treatment process. In the existing slag treatment device, self-cleaning cannot be achieved during the slag treatment process.

Images