In modern steel plants, torpedo mixing tank cars are not only containers for transporting and storing molten iron, but are also used as equipment for pretreatment of molten iron.
When the molten iron flows in and out, the lining on the loading side is directly impacted and worn by the molten iron; the refractory material in the slag line is severely chemically corroded by the pretreatment agent; the temperature of the empty tank of the mixing tank truck is 700℃~800℃, and the temperature of the empty tank of the iron mixing tank truck is 700℃~800℃. The temperature of the blast furnace molten iron in the tank is 1450℃~1500℃, which causes the refractory lining to suffer severe thermal shock. Due to the strong airflow stirring during the injection treatment, the refractory lining is eroded and worn by the molten iron and slag.
The refractory lining of torpedo tank cars can be roughly divided into: insulating safety lining, tank mouth, tank roof, slag line, below the slag line and molten iron impact lining, etc. Usually, torpedo tank cars are lined with refractory materials, and different materials are used for comprehensive masonry construction in different parts. The linings of torpedo tank cars without molten iron pretreatment are generally constructed with high-quality clay bricks and high-alumina bricks. There is a tendency to use Al2O3-SiC-C bricks instead of aluminum silicate refractory bricks in the slag line. In the torpedo tank cars undergoing molten iron pretreatment, Al2O3-SiC-C bricks with good corrosion resistance have been widely used as linings.
Specializing in refractory materials for over 20 years, we provide professional refractory solutions for the global high temperature industry.