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To introduce the history of refractories - alumina magnesia carbon bricks

Date:2017-11-21 Author: Click:

  More than 4,000 years ago, China used less impurities in clay, aluminum magnesia carbon brick fired pottery, and has been able to cast bronzes. The Eastern Han Dynasty (AD 25~220) had used clay refractories as kiln materials and casket for firing porcelain. At the beginning of the 20th century, refractories developed towards high-purity, high-density and ultra-high-temperature products, and amorphous refractories and high-refractory fibers (used in industrial kilns above 1600 C) with no need for 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 ammonia plant in a large chemical plant, and the effect is good. Since the 1950s, the rapid development of atomic energy technology, space technology and new energy development technology requires the use of high temperature resistance, corrosion resistance, heat shock resistance, erosion resistance and other special refractories with comprehensive excellent properties, such as oxides whose melting point is higher than 2000', refractory compounds and high temperature composite refractories.alumina-magnesia-carbon brick

 

Refractories in ancient, medieval and Renaissance times, 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 refractories manufacturing technology and major technological advances, and prospects for future development of refractories, refractories and high temperature technology The concomitant appearance originated in the middle of the bronze age.




China's Eastern Han Dynasty has used clay refractories as kiln materials and casket for firing porcelain. At the beginning of the 20th century, refractories developed toward high-purity, high-density and ultra-high-temperature products. At the same time, unshaped refractories and refractory fibers with no need for firing and low energy consumption appeared. With the development of atomic energy technology, space technology and new energy technology, refractories with excellent comprehensive properties such as high temperature resistance, corrosion resistance, thermal vibration resistance, erosion resistance have been applied. Many factories in China produce refractory products. China has abundant resources, and it is for this reason that major foreign investors have come to China to show their skills. Northeast China is an area with abundant suppliers of refractories, which has led other foreign investors to question its low export prices. In 2003, the European Union initiated an anti-dumping campaign against new refractory products from China, restricting their exports to the European Union.




In 2006, in order to protect the loss of raw material resources, China reduced and exempted the export tax rebate for some industries, thus greatly restricting the export of products. But this does not limit the sales of some foreign brands to a large extent, because they have decades or even hundreds of years of sales and production experience, and greatly occupy the market, but also create their brand effect on all continents.


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