According to the composition of the amorphous refractory, the amorphous refractory is divided into two categories: heavy and light. The lightweight amorphous material has a physical energy density of less than 1800 kg/m 3 , and the heavy amorphous refractory has a physical energy density of 1800 kg/m 3 or more . According to the product form of the amorphous refractory material, the unshaped refractory material is divided into three categories: shaped products, special materials and bulk materials. In addition, under the guidance of the above classification, we classify according to the type of bonding agent, refractory orthopedic varieties and construction methods. This classification is very practical, and the most applied is classified according to the construction method, such as castables and spreads. Plastics, press-in materials, projection materials and pre-formed blocks are classified according to this method. The production of amorphous refractories is produced in two major categories: the production of shaped products and the production of bulk materials. Production methods are different depending on the variety. (1) Production of refractory castables. The production of refractory castables mainly includes the following processes: crushing, pulverizing, sieving, batching, mixing, dispensing and inspection of refractory raw materials . (2) Production of refractory plastics. The difference between the production of refractory plastics and refractory castables is that the production of refractory plastics increases the processes of mixing, squeezing, cutting, and packaging, thus increasing the equipment such as the squeezing machine and the cutting machine. (3) Production of prefabricated blocks. The precast block is a shaped product produced using refractory castable or refractory plastic, and is one of the varieties of the amorphous refractory. Compared with the unshaped refractory materials on site, the prefabricated blocks have the advantages of accurate size, stable performance and short construction period. Compared with fired refractory bricks, the advantages of prefabricated blocks are good integrity, no high temperature firing, and simple construction. In some cases the preforms can be used without baking. The production of preforms increases the wet mixing, forming, curing and baking processes compared to refractory castables and plastics. The forming of the preform is usually carried out on a vibrating table. 1. Ironmaking system The ironmaking system includes sintering, coking and blast furnaces and their associated equipment. In the sintering process of iron ore fines, the sintering machine holding furnace is usually lined with two materials, namely refractory fiber felt or lightweight heat-insulating castable. The ironmaking blast furnace is a continuous production equipment. Previously, high-aluminum cement and high-alumina refractory-burning materials were used to build small blast furnaces. Nowadays, all of them are made of resin-bonded aluminum-carbon non-fired bricks. The use of castables as refractory materials for furnace walls of large blast furnaces is a trend in the future. 2. Steelmaking system Steelmaking systems include open hearth furnaces, converters, electric furnaces, refining furnaces, ladle and tundishes, and other equipment. In the past, clay bags, high-aluminum bricks, and semi-silica bricks were generally used to build ladle, so that the ladle of the masonry has a service life of 10 to 70 times. In recent years, water glass aluminum-magnesium-carbon non-fired bricks have been widely used for masonry ladle, which has a service life of 35 to 80 times. At present, Al 2 O 3 - spinel castable has become the protagonist of refractories for ladle. It is well known that its corrosion resistance is good and its service life is relatively long, which improves the quality of steel to some extent. Advanced and diversified are the development direction of refractory materials for continuous casting, and the development of continuous casting steel has promoted the formation of this development direction. 3, rolling system The industrial furnaces in the rolling system have many types and large quantities, and the use temperature is generally lower than 1500 ° C, all of which are flame furnaces. The high-aluminum refractory plastic or clay combined with refractory castables is used as the overall lining of the initial rolling soaking furnace wall, which has a service life of 3 to 6 years, which is 1 to 4 times higher than that of the high aluminum brick. Conclusion Development of metallurgical industry in promoting the development of refractories. The actual demand for industrial production determines the development trend of shaped and unshaped refractories, and the two are basically compatible. In recent years, unconventional refractory materials have undergone rapid changes at home and abroad, and have achieved enormous economic benefits in various application fields. Ultra-Thin Ball Valve,Industrial Ultra-Thin Ball Valve,Thread Globe Valves,Threaded Swing Check Valve ZHITONG PIPE VALVE TECHNOLOGY CO.,LTD , https://www.ztpipevalve.com
The amorphous refractory material has the following advantages: the production process is simple, the system saves energy, the product performance is excellent, the shape can be arbitrarily shaped, and the service life is long. At the same time, the application field has also expanded from a low-medium temperature atmosphere furnace to a high-temperature melting furnace, so that the application range of the amorphous refractory material is different, and has a good economic benefit. Classification of unshaped refractories Production process of amorphous refractory Application of amorphous refractories