A liquid slag flow control device with quick replacement and accident handling functions

A flow control device and a technology for liquid slag, applied in the field of blast furnace slag waste heat recovery, can solve problems such as high temperature corrosion, and achieve the effects of deteriorating the operating environment, preventing splashing, and preventing cooling and condensation
CN108300822BActive Publication Date: 2019-10-11XI AN JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
XI AN JIAOTONG UNIV
Publication Date
2019-10-11

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Abstract

The invention discloses a liquid-state slag flow control device having rapid replacement and accident disposal functions. The liquid-state slag flow control device having the rapid replacement and accident disposal functions comprises a slag ladle. A liquid-state slag inlet is formed in the upper portion of the slag ladle and allows liquid-state slag to flow into the slag ladle. The bottom of theslag ladle is provided with a slag falling device provided with a rotating disk. The side wall of the bottom of the slag ladle is provided with a slag ladle accident deslagging metering nozzle and a normal work metering nozzle. A seal cover covers the outside of the normal work metering nozzle. A stopper rod pushing device outer cavity is formed in the seal cover in the first direction. An accident flow guide groove device inner cavity and an accident slag outlet are formed in the seal cover in the second direction. The first direction is perpendicular to the second direction. The slag fallingdevice provided with the rotating disk comprises the rotating disk and a plurality of slag falling straight pipe sections installed on the rotating disk, wherein only one slag falling straight pipe section is in use, and others are standby. The liquid-state slag flow control device can achieve the liquid-state slag accident disposal function, the flow and temperature monitoring and controlling functions and the slag falling straight pipe section rapid replacement function, and therefore a system can cooperate more stably, more safely and more reliably. The liquid-state slag flow control device can be widely applied to liquid-state slag pelletization waste heat recycling systems.
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Description

technical field

[0001] The invention belongs to the technical field of waste heat recovery of blast furnace slag, and in particular relates to a liquid slag flow control device with functions of quick replacement and accident handling. 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 standard coal / ton. ...

Claims

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