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Show you the history and types of refractories~

wallpapers Industry 2020-12-07
What is

refractory? Refractories refer to inorganic nonmetallic materials with a fire resistance of not less than 1580 ℃. Refractories are widely used in metallurgychemical industrypetroleummachinery manufacturingpower industry so on. At presentthe refractory industry has a good growth posture China's refractory output ranks in the world. Let's take you to underst the development history of refractories the classification of refractories.

the history of refractories

the earliest refractories in China appeared more than 4000 years ago. At that timepeople used clay with less impurities to make porcelain cast bronze wares. In the Eastern Han Dynastyrefractories can be used as kiln materials saggers for firing porcelain. In the early 20th centuryrefractories developed towards high purityhigh density ultra-high temperature products there was no need to add amorphous refractories high refractory fibers with low energy consumption. In the 1950shigh-tech materials further improved the comprehensive performance of the industry.

have been widely used in foreign countries due to the rich market resources raw material resources in China. The production of high temperature resistant materials in China is mainly distributed in Northeast China. Due to the low priceforeign investors have doubts. In 2003the EU restricted the export of refractory materials in China. In 2006in order to protect the loss of resourcesChina reduced taxes on some industries limited the export of refractory materialsbut it did not affect the status of high temperature resistant materials in the international market. Statistics of

refractories in recent years: in 2015the raw materials of refractories were basically self-sufficient the utilization rate of natural minerals was greatly reduced. In 2010the reuse rate of refractories will reach 50% it is expected to reach 75% in 2020. In 2015there were three refractory enterprises that rushed out of the country. It is estimated that the output concentration ratio of the top ten enterprises in China will reach 45% by 2020.

refractories have many kindswhich can be classified according to chemical property classificationchemical mineral composition classificationproduction process classificationmaterial morphology classification so on. According to the refractoriness

can be divided into ordinary refractoryadvanced refractory super refractory.

can be divided into stard typeabnormal type special type according to their shape size.

can be divided into fired productsunfired products amorphous refractories according to their manufacturing materials. According to the chemical realization

can be divided into acid refractoryneutral refractory alkaline refractorywhile

can be divided into carbon composite refractoryzirconium refractoryspecial refractorysilicon refractory corundum refractory according to chemical minerals.

the above is a summary of the development history of refractories the classification of refractorieshoping to be helpful to you http://www.hgqrx.com/article/wjhgyl/8008.html

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