China used clay with less impurities to burn pottery more than 4,000 years ago, and it has been able to cast bronzes. During the Eastern Han Dynasty (25~220 AD), clay refractory materials were used as kiln materials and saggers for burning porcelain. At the beginning of the 20th century, refractory materials developed in the direction of high purity, high density and ultra-high temperature products. At the same time, unshaped refractories and high refractory fibers (used in industrial kilns above 1600°C) without firing and low energy consumption were developed. ). The former, such as alumina refractory concrete, is often used in the inner wall of the second-stage reformer of a large-scale synthetic ammonia production unit in a large chemical plant, and the effect is good. Since the 1950s, the rapid development of atomic energy technology, space technology, new energy development technology, etc. requires the use of special refractory materials with comprehensive excellent properties such as high temperature resistance, corrosion resistance, heat shock resistance, and erosion resistance, such as those with a melting point higher than 2000°C. Oxides, refractory compounds and high-temperature composite refractory materials, etc.
Refractories in the ancient, medieval, and Renaissance eras, refractories for blast furnaces, coke ovens, and hot blast stoves before and after the Industrial Revolution, new refractories and their manufacturing processes in the late modern period, modern refractory manufacturing technology and major technological advances, and future refractory materials Prospects for development, refractory materials and high-temperature technology appeared together, roughly originating in the middle of the Bronze Age. During the Eastern Han Dynasty of China, clay refractory materials have been used as kiln materials and saggers for burning porcelain. At the beginning of the 20th century, refractory materials developed in the direction of high-purity, high-density and ultra-high temperature products. At the same time, amorphous refractory materials and refractory fibers that do not require firing and have low energy consumption appeared. In modern times, with the development of nuclear energy technology, space technology, and new energy technology, it has high temperature resistance, corrosion resistance, thermal vibration resistance, and
Refractory materials with comprehensive excellent performance such as scouring have been applied. There are many factories in China producing refractory products. China has abundant resources, and for this reason, major foreign investors have also come to China to show their talents and show their prowess. In the northeast of China, it is an extremely prosperous area for refractory suppliers, which caused other foreign investors to question their low export prices. As a result, the European Union proposed anti-dumping against new refractory products from China in 2003, which restricted the products. Exports to the European Union. In 2006, in order to protect the massive loss of raw material resources, China reduced or exempted the export tax rebate in some industries, thereby greatly restricting the export of products. But this does not limit the sales of some foreign brands to a large extent, because they have dozens or even hundreds of years of sales and production experience, and they have greatly occupied the market, and they have also created their brand effects on all continents.
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