2024.04.02

What is the main component of quartz

Quartz is one of the main rock-forming minerals, generally refers to low-temperature quartz (α-quartz), which is the most widely distributed mineral in the quartz group. The generalized quartz also includes high-temperature quartz (β-quartz) and cogite. The main component is SiO2, colorless and transparent, often contains a small amount of impurities, and become translucent or opaque crystals, hard texture.

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2024.04.02

Understanding Submerged Nozzle

In the continuous casting technology, in order to improve the quality of the cast billet, there is a submerged nozzle between the tundish and the mold, its main functions are:(1) to prevent the secondary oxidation and nitriding of molten steel and the splash of molten steel;(4) It has a decisive influence on the yield and quality of cast billets.

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2024.04.02

What is long water mouth

When molten steel is poured from the ladle to the tundish, in order to avoid oxidation and splash, a long water port is installed at the lower end of the sliding water port at the bottom of the ladle, one end is connected to the water port, and the other end is inserted into the molten steel of the tundish for sealed protection pouring. The functions of the long water mouth are as follows:(1) to prevent the secondary oxidation of molten steel and improve the quality of steel;(2) to reduce the oxidation products of the easily oxidized elements in the steel on the inner wall of the nozzle and prolong its service life;(3) the long water mouth can be used many times to reduce the consumption of refractory materials.

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2024.04.02

Anti-blocking measures for stopper

Plug rod anti-blocking measures: 1, plug rod blowing argon. When casting special steel with Ti, Ca or Si elements, the joint part of the rod end and the nozzle is easy to form inclusion blockage. The plug head is porous and slit, and argon is blown to the submerged nozzle from here to prevent nodulation and blockage. 2. Air wash long water mouth. The argon gas is blown from the upper end of the core tube of the tundish plug rod and enters the injection flow through the porous plug brick, which not only prevents the nozzle from being blocked, but also has the effect of refining the inclusion and reducing the inclusion. 3, spinel-carbon plug rod anti-blocking. The calcium treated steel corrodes the aluminum carbonaceous material, and the newly developed spinel-carbon plug rod is serious. It does not react with mCaO · nAl2O3, and the material has high strength and good corrosion resistance.

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2024.04.02

The characteristics of the whole plug rod

The characteristics of the whole plug rod: the whole plug rod is formed by isostatic pressing, and its shape and size depend on the capacity of the tundish, the height of the steel water surface and the horn shape and aperture size of the tundish nozzle. The plug rod head has a hollow, with argon blowing hole or with a vent plug of the whole stopper rod. The fixing method is the key, one is fixed by metal mining pin and the other is fixed by thread.

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2024.04.02

What are the three pieces of continuous casting

Functional refractory elements such as integral stopper rod, long water mouth (large bag long water mouth), immersion nozzle (water mouth used in the middle bag), and middle bag nozzle are collectively referred to as the three major pieces of continuous casting. Its material is mainly aluminum carbon, aluminum zirconium carbon, magnesium carbon or magnesium aluminum spinel carbon, molding method using isostatic pressing molding. The molding pressure is generally divided into 50Mpa, 100Mpa, 125Mpa, etc. Different pressures are used according to different parts of the nozzle and different particle gradation.

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