Process requirements and composition of breathable bricks

In the process of molten steel smelting, the bottom of the converter ladle will be smelted with 通気性のあるレンガ to blow inert gas, mainly for purging the gas and solid impurities in the molten steel, so as to achieve the purpose of uniform molten steel composition and temperature; in short, breathable bricks are installed in the converter ladle A very important air supply element at the bottom.

（写真）不浸透性の通気性レンガ

During the smelting process of steelmaking plants, there are three main reasons for the damage of breathable bricks. They are cracks and spalling caused by thermal shock caused by the temperature difference between molten steel and ladle, erosion and penetration of molten slag in molten steel, and erosion caused by molten steel agitating and flowing. And erosion. Therefore, the breathable brick is required to have high heat resistance, thermal shock stability, abrasion resistance, erosion resistance, and corrosion resistance. In addition, it must be safe to use and good in air permeability.

The slit-type ventilating brick has a large adjustable range of air supply, which can meet the requirements of gas flow in different periods of smelting, and the reverse impact is small when blowing, so the slit-type ventilating brick is more and more popular. Breathable bricks are made of corundum as the main raw material by combining seat bricks, breathable brick cores and steel sleeves. Install a stainless steel sleeve with an argon blowing tube on the prepared ventilating brick core, and then put it into the hole of the seat brick, and fill the gap between the steel sleeve assembly and the seat brick with refractory mud to form a complete ventilating brick .

（写真）スプリット通気性レンガ

Luoyang firstfurnace@gmil.com Co., Ltd. produces breathable bricks with rich experience and superb technology. Professional manufacturers are trustworthy! Among them, the patented product FS series of anti-seepage type ladle bottom argon-blowing ventilating bricks, due to less or no cleaning during use, reduces manual intervention, and can effectively reduce the abnormal melting loss of ventilated bricks caused by the effect of oxygen burning; The patented products DW series and GW series slit type ladle bottom argon-blowing breathable bricks developed and produced can effectively reduce the loss of breathable bricks caused by thermal stress, mechanical abrasion and chemical erosion due to their unique formula. Through personalized customization on the customer site, to meet the different on-site process requirements of different customers, effectively extend the service life of the ventilating brick, reduce customer costs, and increase customer profits. Luoyang firstfurnace@gmil.com Co., Ltd. focuses on the R&D, production and sales of breathable bricks. It is a professional manufacturer of breathable bricks. Welcome to inquire.