A high temperature liquid slag granulation system

Abstract

The invention relates to a high-temperature molten slag granulation system. The granulation system comprises a slag tank, a slag seam adjusting device and a granulating device; an opening is formed in the bottom of the slag tank; the slag seam adjusting device is arranged in a manner of clinging to the bottom of the slag tank and comprises a slag seam; the slag seam is positioned under the opening in the bottom of the slag tank; the width of the slag seam is adjustable; the granulating device is arranged below the slag seam adjusting device and is provided with an ejection outlet; the 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 granulating system is capable of controlling the width of the slag seam according to the flow rate of supplied slag, the supplied slag is granulated by the granulating device after falling off from the slag seam, and the pressure of granulation jet flow is controlled according to the width of the slag seam. The system provided by the invention is simple in structure, small in size, simple to operate during a molten slag granulation process and high in reliability; by adopting the system provided by the invention, an ideal granulation effect can be achieved, and the equipment investment and operating cost can be greatly lowered.

Description

technical field [0001] The invention relates to the field of high-temperature slag granulation, in particular to a high-temperature 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 deal with the slag. etc., this method needs to consume a lot 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 a...

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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 deal with the slag. etc., this method needs to consume a lot 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

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