What are refractory materials?
Refractory materials are the basis for all high-temperature industrial implementations, with a wide variety and wide application. This article summarizes the application of refractory materials in the four major downstream: steel industry, cement industry, non-ferrous metal smelting industry and glass industry, including blast furnace, converter, electric furnace, pot furnace, LF furnace, RH vacuum refining equipment, Selection of different types of refractory materials for high-temperature equipment such as cement kilns, glass kilns, and non-ferrous metal smelting furnaces. If you are as confused as the previous editor, then come and take a look at this article.
Refractory materials, according to international standards, refer to non-metallic materials and products that have stable chemical and physical properties and can be used normally under high-temperature environments (does not exclude a certain proportion of metal) materials and products. The American standard definition of refractory materials: According to its chemical and physical properties, it can be made into non-metallic materials for structures and devices in environments with temperatures exceeding 1000 ℉. According to Japanese standards, refractory materials are defined as shaped refractories that can be used at temperatures above 1500°C, as well as unshaped refractories, refractory slurries, and refractory insulation bricks that can be used at temperatures above 800°C. China has followed the international standards. Refractories are defined as non-metallic materials with physical and chemical properties suitable for use at high temperatures, but it does not rule out that certain products may contain a certain amount of metallic materials.
Refractory materials have a variety of classification methods. According to chemical properties, they can be divided into three categories: acidic refractories, alkaline refractories and neutral refractories.
According to the main mineral chemical components of refractories, it can be divided into: siliceous refractories, aluminosilicate refractories, magnesia refractories, magnesia spinel refractories, magnesia chromium refractories, magnesia dolomite refractories Refractories, dolomite refractories, carbon composite refractories, high alumina refractories, chromium refractories, zirconium refractories, etc.
Classified according to the form of supply, it can be divided into two types: shaped and unshaped refractories.
According to different classifications of refractoriness, they are divided into ordinary/advanced/super-grade/super refractory materials; those with a temperature resistance of 1580~1770℃ are called ordinary refractories, advanced refractories can withstand high temperatures of 1770~2000℃, and those with high temperature resistance of 2000~3000℃ are called Special-grade refractories, those above 3000℃ are called super refractories.
According to the classification of bulk density, it can also be divided into light/heavy refractories.
According to the different classification of nature and size, it is divided into standard type / general type / special type / special type refractories, etc.