In 30 years, the maximum volume of Japanese blast furnaces has increased from about 1,000 m3 to more than 5,000 m3, the air supply temperature of hot blast stoves has increased from nearly 430° to over 1200°C, and the air supply pressure has increased from about 0.8 kg/cm to 3 kg. /Cm2 or more. This shows that with the large-scale blast furnace, the smelting intensity has increased, and the operating conditions have become increasingly harsh, and the life of the blast furnace has dropped from about 10 years to 5 to 7 years.
The structure of the blast furnace hot blast stove has developed from an internal combustion type to an external combustion type or a top combustion type. At present, the most widely used is the external combustion type hot blast stove, that is, the regenerator and the combustion chamber are separated and are respectively arranged in two cylinders. Connect with bridge channel. The top temperature of this kind of hot blast stove is 1500~1560℃, and the average temperature of hot blast is about 1200℃. In this case, the upper part of the checker brick and its wall and dome will work under high temperature conditions for a long time. Therefore, refractory materials with good high temperature creep characteristics and volume stability should be selected.
Founded in 2003, our company is located in Xinshiji Industrial Park, Huantai County, Zibo City, with convenient transportation. It is an enterprise specializing in the production of unshaped refractory materials integrating R&D, production, sales and construction.
Our company has a professional engineering construction team, which can carry out the overall contracting, repairing, and maintenance of the iron-making blast furnace tap chute. Our company has successively repaired and maintained iron-making blast furnace tapping ditch for iron and steel enterprises such as Tianjin Tianfeng Iron and Steel, Hebei Jiujiang Qian'an Iron and Steel, and Chuanyang Group, and has won unanimous praise from customers.