A liquid slag granulation system

Abstract

The invention relates to a molten furnace slag granulation system. The granulation system comprises a slag tank, a slag seam adjusting device, a granulating device and a slag tank lining; an opening is formed in the bottom of the slag tank; the slag seam adjusting device comprises a first roller and a second roller which are respectively arranged at the bottom of the slag tank; a gap is kept between the first roller and the second roller to form a slag seam; the slag seam is positioned under the opening in the bottom of the slag tank; the first roller and / or the second roller can move in the horizontal direction; the granulating device is arranged below the slag seam adjusting device; an ejection outlet of the granulating device is towards the lower portion of the slag seam; the granulating device is a high-pressure ejecting device; the slag tank lining is placed inside the slag tank and is matched with the slag tank in shape. The system provided by the invention is simple in structure, small in size, simple to operate during a molten slag granulation process, high in reliability, ideal in granulation effect and capable of guaranteeing sustainability of furnace slag granulation, realizing automatic cleaning during a granulation process and also greatly lowering the equipment investment and operating cost.

Description

technical field [0001] The invention relates to the field of high-temperature slag granulation, in particular to a liquid slag granulation system. 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 and operating costs, when ...

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] Since the blast furnace slag is intermittently discharged at the same blast furnace slag outlet, that is, one slag outlet is discharged after about 2 hours for another slag discharge, and the existing granulation system takes a long time to clean, and it is difficult to achieve granulation Sustainability

Moreover, the slag is cohesive, and it will inevitably stick to the equipment during the treatment process. In the existing slag treatment device, automatic cleaning cannot be realized during the slag treatment process.

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