Breathable bricks and tundish refractories for steelmaking

The material of the ventilated bricks used by steel-making factories is corundum, spinel, etc., and the main compound contained is Al2O3 (content ≥90%), and also contains a small amount of MgO and Cr2O3. The function of the ladle breathable brick is to remove impurities (unwanted elements, gases, etc.) in the molten steel and increase the temperature of the molten steel. Some ladles are double breathable bricks, in which the breathable core can be replaced.

(Picture) Slit-type breathable brick

The tundish is a refractory container. Generally, a buffer device used by steel manufacturers is used to buffer the falling impact of molten steel after the low argon blowing process of the breathable brick. First of all, it can accept molten steel pouring down to reduce the splash strength of molten steel. After buffering is completed, it will be distributed to each mold from the nozzle. This is not only beneficial to the safety and reliability of ladle refining, but also beneficial to the physical and chemical properties of molten steel. . The tundish mainly plays the role of reducing pressure, stabilizing flow, removing inclusions, storing, and diverting molten steel. The refractory materials for the tundish include impact plates, flow stabilizers, ventilating water inlets, slag retaining wall weirs, etc.

Similar to the material of ladle air-permeable bricks, the tundish materials used by manufacturers are mainly corundum, etc., and also contain a certain amount of magnesium oxide. There are three main variants of the homogeneity of corundum Al2O3, namely α-Al2O3, β-Al2O3, and γ-Al2O3. The hardness of corundum is second only to diamond. Corundum is mainly used for high-grade abrasive materials, watch and precision machinery bearing materials. Ruby-based artificial crystal as a laser emitting material. Rubies and sapphires are both corundum minerals. Except for the starlight effect, only translucent-transparent and brightly colored corundum can be used as gemstones. The red color is called ruby, while the other colors of corundum are collectively called sapphire in business.

Ladle air-permeable bricks and tundish refractories are very important to steel manufacturers and have an irreplaceable role. Firstfurnace@gmil.com, as a professional manufacturer of breathable bricks, has produced breathable bricks for 18 years. It has rich experience, superb technology, patented formula, unique design, domestic leading production equipment and first-class production technology, and has a production capacity of 120,000 sets. The country’s largest manufacturer of argon blowing and venting components.