Introduction to the method of improving the argon blowing rate of ladle permeable bricks

Today, the professional ladle breathable brick manufacturer of Luoyang Quantong Kiln Industry Co., Ltd. will show you how to improve the argon blowing rate of ladle breathable bricks:

A: Improve the masonry process. Before repairing the tank, investigate and check the breathable bricks. It is stipulated that the working surface of the breathable bricks should not be lower than 30mm at the bottom of the tank to avoid cold steel; check whether the metal hose is burned out and whether the screws at the two ends are loose. In order to ensure the strength of argon blowing and reduce the penetration and blockage of molten steel, use a feeler gauge to check the air passage of the breathable brick slit before masonry, and select a breathable brick with an air passage width suitable for the working conditions; check the tail pipe of the breathable brick before masonry Whether the thread is damaged. During the process of building the breathable brick, make sure that the tail pipe does not enter the dust and debris. After the ladle is repaired, the garbage at the head of the breathable brick should be cleaned up.

B: It is better to choose a breathable brick with a longer lifespan and less steel penetration in the airway under certain working conditions.

C: Careful use. During the application of the breathable bricks, the argon gas flow is strictly controlled at different processing stages to avoid the high flow of bottom blowing to accelerate the corrosion of the bottom-blown breathable bricks. During the application process, the connection of the gas pipeline is often investigated and found Leakage of the joint is dealt with immediately to avoid gas leakage, which will reduce the pressure in the pipeline and cause the bottom blowing failure.

D: Strengthen the maintenance of air-permeable bricks. Because the bottom-blown air-permeable bricks are corroded, the concave parts are easy to accumulate steel and condense. After the steel is poured, the air source (argon or compressed air) is immediately connected to the large ladle turntable. Condensed infiltrated steel and accumulated steel in depressions of bottom-blown ventilation bricks.

E: In order to prevent molten steel from infiltrating into the air-permeable brick due to positive pressure during the stop of argon blowing, equipment for reverse infiltration—one-way stop valve, air bag, etc. on the argon blowing pipeline. In the air-permeable brick core 150mm from the lower part Set up an alarm block to ensure that the safe use of the breathable bricks can be fully used, reduce the leakage accident of the breathable bricks caused by the ladle inspection error, and enable the breathable bricks to be replaced regularly. Dynamic management of the breathable bricks, laying Each link of construction, use, inspection, backflushing, backburning, testing, and dismantling should have detailed records, so that problems can be found in time.

F: The purity of argon used for ladle blowing argon mixing should be 99.99%, and its content should be strictly controlled below 8ppm. Fluxing will speed up the high temperature melting loss of the breathable brick, which will generally reduce the life of the breathable brick, and in severe cases will lead to a steel leakage accident of the breathable brick.

The above is the relevant introduction of how to improve the argon blowing rate of ladle breathable bricks