Material of refractory bricks: Cr90 bricks
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The material of the refractory brick is Cr90 brick; what does Cr90 mean here?
It seems to be Cr2O3; the content is 90%. In fact, as long as it’s above 85%, it can be classified as 90-grade brick. The impression isn’t very accurate.
http://bbs.hcbbs.com/thread-125472-1-12.html There is information about refractory bricks there, which might be useful to you
This post was last edited by dddjie on 2010-2-25 21:21. As the friend in the second comment said, Cr90 refers to bricks with a Cr2O3 content of over 86%; in the chemical industry, such bricks are called heat-resistant bricks or fire-facing bricks, while manufacturers refer to them as high-chromium bricks or chromium-aluminum-zirconium bricks. It is generally used as the working lining in gasifiers. For more information, please contact me; I am a technician from a manufacturer of refractory materials for gasification furnaces. :handshake
The main component is Cr2O3, with a content of 85–95%; it possesses properties such as high purity, high strength, high density, corrosion resistance, and wear resistance. It is mainly used in water-coal slurry and petroleum coke pressurized gasification furnaces in the petrochemical industry.
It is commonly referred to as heat-resistant face brick; the required physical and chemical specifications are that Cr2O3 should be 86% or higher, and ZrO2 should be 7% or higher