An operation method of a liquid slag flow control device with quick replacement and accident handling functions

Abstract

The invention discloses an operation method of a liquid slag flow control device with quick replacement and accident handling functions. The control device includes a slag ladle; a slag dropping device with a turntable is installed at the bottom of the slag ladle; The sizing nozzle; the outside of the sizing nozzle in normal operation is covered with a sealing cover; the first direction of the sealing cover is provided with the outer cavity of the stopper rod pushing device; the second direction of the sealing cover is provided with the inner cavity of the accident diversion groove device and the accident outlet The slag outlet; the slag dropping device with a turntable includes a turntable and a number of spare slag drop pipe straight pipe sections installed on the turntable; the operation method of the present invention, in addition to meeting the accident handling functions of cutting off slag and discharging slag, also It has the characteristics of high safety, high feasibility and simple operation, which can effectively ensure the safety and convenience of operators during operation. It can specifically realize 4 operations, namely quick replacement operation, accident slag discharge operation, and rapid emergency discharge Slag operation and flow control operation.

Description

technical field [0001] The invention belongs to the technical field of waste heat recovery of blast furnace slag, and in particular relates to an operation method of a liquid slag flow control device with quick replacement and accident handling functions. Background technique [0002] After nearly 30 years of development, my country's steel production has increased significantly. Vertically, my country's crude steel output increased from 66 million tons in 1990 to 810 million tons in 2016, with a compound growth rate of 10.1%. Horizontally, my country's crude steel output reached 810 million tons in 2016, accounting for 50.5% of global output. During the iron and steel smelting process, a large amount of high temperature slag will be produced. It is estimated that the slag temperature of blast furnace slag can be as high as 1400-1550°C, and the sensible heat value per ton of high-temperature blast furnace slag can be as high as 1260-1880MJ / ton, which is equivalent to 60kg ...

AI Technical Summary

Problems solved by technology

At this time, the high-temperature slag will corrode the high-temperature buffer device of the liquid slag and its auxiliary pipelines at high temperature

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