Performance and requirements of refractory materials for ladle

Ladle is to undertake the molten steel, continuous casting of the necessary equipment. Because many steel grades need to be refined in the ladle, including blast argon tempering, fine-grained alloy composition, powder refining and vacuum treatment, Ladle Permeable Brick lining working conditions worse and worse, the working environment is:

(1) The temperature of the molten steel is higher than that of the molded ladle.
(2) The residence time of the molten steel in the ladle is prolonged.
(3) Ladle liner itself volatilizes under high temperature vacuum and undergoes the stirring action of molten steel.
(4) lining to undertake the impact of the role of steel received.
(5) slag erosion of the lining.

Therefore, the requirements for ladle refractory are:
(1) high temperature, can withstand high temperature molten steel for a long time without melting softening.
(2) heat shock, can be repeated to withstand the installation of molten steel, without cracking peeling.
(3) resistance to slag erosion, can withstand slag and slag basicity changes on the erosion of the lining.
(4) has sufficient high temperature mechanical strength, can withstand the stirring and erosion of molten steel.
(5) lining has a certain expansion of the role of high-temperature molten steel, so close contact between the liner into a whole.

Refractory company Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory materials,refractory brick, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.

Analysis on Performance Requirement of Refractory material in Heat Treatment Furnace

The qualified of anchor brick is similar to the material of furnace lining castables and formed by preeing and being fired at high temperature. Characterized by good thermal shock resistance and high strength, it is used for several heating furnace and has good effect.

Refractory: Any material capable of resisting high temperatures and capable of withstanding high temperature physical and chemical effects.
Heat treatment furnace refractory material performance requirements:
1 has sufficient refractoriness. Refers to the refractory material after heating to a certain degree of softening temperature, but not its melting point.
According to the level of refractoriness, ladle refractory can be divided into ordinary refractories (refractory degree of 1580 ~ 1700 ℃), advanced refractories (refractory degree of 1770 ~ 2000 ℃) and special refractories (refractoriness greater than 2000 ℃).
2 has a certain high temperature structural strength. The structural strength at high temperature is evaluated by the softening point of the load, and the softening point of the load is the pattern
(The size of φ36 * 50mm) under a certain pressure (0.2MPa) conditions, a certain heating rate of heating, measured the sample began to deformation (deformation of the original sample 0.6%) temperature, the temperature is called refractory castable Of the load softening point starting point.
3 high temperature chemical stability.
4 has good resistance to abrupt heat.
5 volume stability at high temperatures.

The reasons that the damage of ladle upper nozzle and its reventive measures

Ladle nozzle is widely used in steel plant.

1. The reasons that the damage of ladle upper nozzle
1) Under the scouring and erosion of liquid steel and steel slag, the slag erosion will occur under wrong operation process.
2) Mechanical damage during installation process.
2. To prevent the damages of refractory material sliding gate nozzle system, measures should be taken as below:

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