Secondary liquid slag temporary storage system with flow temperature monitoring and controlling functions

Abstract

The invention discloses a secondary liquid slag temporary storage system with flow temperature monitoring and controlling functions. A slag inlet is formed in the upper portion of a slag ladle shell. A plurality of slag outlets are formed in the side face of the bottom of the slag ladle shell. Each slag outlet is composed of a brick cup and a fixed-diameter nozzle. A stopper is arranged in each slag outlet, and each stopper comprises a stopper head, a stopper rod and a stopper control device. Each brick cup is provided with a brick cup runner and a fixed-diameter nozzle containing cavity communicating with the brick cup runner. Each fixed-diameter nozzle is installed in the corresponding fixed-diameter nozzle containing cavity. Each brick cup runner communicates with the slag ladle shell and an inlet of a fixed-diameter nozzle inner runner of the corresponding fixed-diameter nozzle. Each stopper rod is connected with the corresponding stopper head and the corresponding stopper control device. Each stopper control device is used for controlling the flow passage area between the corresponding stopper head and the corresponding fixed-diameter water nozzle. A sealing cover is arranged outside each fixed-diameter nozzle, and the bottom of the sealing cover is provided with a slag falling pipe. According to the secondary liquid slag temporary storage system, the liquid slag temporary storage function and the flow temperature monitoring and controlling functions can be achieved, the liquid slag is subjected to subsequent pelletizing process continuously and stably, and the secondary liquid slag temporary storage system can be widely applied to liquid slag pelletizing waste heat recycling systems.

Description

technical field [0001] The invention relates to the technical field of liquid slag waste heat recovery, in particular to a secondary liquid slag buffer system with flow temperature monitoring and control functions. 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, liquid 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 (1260~1880)×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 liquid slag is produced as a by-product for every ton of pig iron produced. Based on the current pig iron production in my country of 711 mil...

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Problems solved by technology

[0004] The high-temperature slag rotary cup granulation recovery system is a system that recovers the high-temperature sensible heat of slag. However, the flow control of slag is a key part of the system. If the flow control of slag is not good, it will affect the subsequent granulation. The chemical process is carried out continuously and stably

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