1. Zirconia is a special refractory material. Zirconia is an acidic refractory material with a melting point of 2650°C. Because of its high temperature chemical stability, it can be used as furnace lining material for vacuum furnaces, molybdenum wire furnaces, gas furnaces, medium- and high-frequency electric furnaces, and single crystal furnaces. In the metallurgical industry, it is used as the sizing nozzle and separation ring of horizontal continuous casting. In single crystal furnace, it can make heat shield and lining.
Zirconium hollow spheres and zirconium fiber products are advanced insulation and energy-saving furnace lining materials in the current oxide. In the high-temperature furnace not only do insulation materials, and directly do the furnace lining materials.
2. Thorium oxide special refractories, although the melting point is very high, 3050 ° C, but the operating temperature can be as high as 2700 ° C, but radioactive. It can be used as melting uranium, osmium, rhodium, radium crucible, as a nuclear reactor nuclear fuel, but also as a high-temperature furnace heating element. Cerium oxide is a special kind of refractory material, which is easily reduced though its melting point is very high. Its products are used as containers for melting rare earth metals, low-resistance semiconductor devices and abrasive materials.
Many elements and compounds, although the melting point is very high, but as a raw material for special refractories, there are certain limitations, such as the decomposition of some raw materials in the heating process, some raw materials have great toxicity or radioactivity, and some raw materials are very expensive, so they should be fully considered in the application.
Zhen'an Refractories Co., Ltd, subordinate to Gnee Group, is committed to the research and development and manufacture of refractories, and is a comprehensive enterprise integrating science, industry and trade. The company's main products include high alumina bricks, clay bricks, lightweight insulation bricks, wear-resistant castables, corundum castables, low cement high-strength castables, seepage-proof materials, self-flowing materials, wear-resistant plastics, refractory balls and various grades of refractory cements and other shaped and unshaped refractories, which are widely used in the metallurgy, non-ferrous metals, building materials, electricity, petrochemical and other industries, and the products are sold to more than 60 countries all over the world, and have won the customers' wide acclaim.
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