A control device for controlling the flow rate of liquid slag

Abstract

The invention discloses a control device for controlling flow of liquid molten slags. The control device comprises a slag ladle outer shell, brick cups, fixed diameter nozzles and stopper rods, wherein a slag inlet is formed in the upper part of the slag ladle outer shell; a plurality of slag outlets are formed in the side surface of the bottom of the slag ladle outer shell; the slag outlets are composed of the brick cups and the fixed diameter nozzles; the slag outlets and the stopper rods are in one-to-one correspondence; the stopper rods comprise stopper rod heads, stopper rod bars and stopper rod control devices; brick cup runners and fixed diameter nozzle accommodating cavities which communicate with each other are formed in the brick cups; the fixed diameter nozzles are mounted in the fixed diameter nozzle accommodating cavities; one ends of the brick cup runners communicate with an inner cavity used for accommodating the molten slags in the slag ladle outer shell; the other ends of the brick cup runners communicate with inlets of fixed diameter nozzle inner runners of the fixed diameter nozzles; one ends of the stopper rod bars are connected with the stopper rod heads; the other ends of the stopper rod bars are connected with the stopper rod control devices; and the stopper rod control devices are used for controlling the through-flow area between the stopper rod heads and the fixed diameter nozzles. According to the control device, the function of controlling the flow of the molten slags can be achieved, the service life of the stopper rods is prolonged, and the molten slags are continuously and stably subjected to follow-up pelletization.

Description

technical field [0001] The invention relates to the technical field of slag waste heat recovery, in particular to a control device for controlling the flow of liquid slag. 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 ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a control device for controlling the flow rate of liquid slag, so as to overcome the current problems of slag flow fluctuations and stopper rods being easily corroded by slag and having a short service life

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