Slag buffering system with flow control function

Abstract

The invention discloses a slag buffering system with a flow control function. The slag buffering system comprises a slag ladle shell, stopper rods, stopper rod control mechanisms and slag falling pipes. A slag inlet is formed in the upper portion of the slag ladle shell, and a plurality of water openings are formed in the bottom of the slag ladle shell. The slag falling pipes with flow meters are arranged at the lower portions of the water openings. Each water opening is correspondingly provided with a stopper rod. The stopper rods are arranged over the corresponding water openings. The stopper rod control mechanisms are used for controlling the circulation area between the stopper rods and the water openings. Slag flows into a slag ladle from a slag inlet above the slag ladle and is stored in the slag ladle, and the slag flows out of the slag falling pipes from the water openings in the bottom of the slag ladle. The flow of the slag is controlled by controlling the circulation area through cooperation of the stopper rods and the water openings. The flow meters are arranged on the slag falling pipes to detect the flow of the slag, and detection signals are fed back to the stopper rod control mechanisms. According to the slag buffering system, the temporary slag storage function and the flow control function are achieved, the following pelletization process can be continuously and stably conducted on the slag, and the slag buffering system can be widely applied to a slag pelletization waste heat recycling system.

Description

technical field [0001] The invention relates to the technical field of slag waste heat recovery, in particular to a slag buffer system with a flow control function. Background technique [0002] China is currently the world's largest steel producer, and its steel output has remained the world's largest for 17 consecutive years. In 2014, China's pig iron output reached 711 million tons, accounting for about 60% of the world's total output. In the process of smelting pig iron, slag containing huge heat will be produced at the same time. The temperature of the molten slag is generally between 1400 and 1550 ° C, and each ton of slag contains (1260 to 1880) × 10 3 The sensible heat of kJ is equivalent to 60kg standard coal. Under the current ironmaking technology in my country, 0.3 tons of slag is produced for every ton of pig iron produced. Based on the current pig iron production in my country of 711 million tons, it can be converted into more than 213 million tons of slag, a...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a slag buffer system with a flow control function to overcome the serious waste of high-quality slag waste heat resources

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