The General Office of the State Council recently issued the Guiding Opinions on Promoting the Steady Growth of Building Materials Industry and Adjusting the Structure and Increasing the Benefit of Building Materials Industry.
"Opinion" proposed in order to reduce costs and increase efficiency, building materials industry to implement green intelligent development, one of the measures is to promote chromium-free refractories.
Magnesium chromium bricks are often used as lining materials in cement kiln firing zone. However, in high temperature, alkaline and oxidizing atmosphere, Cr3+ in magnesia chromium bricks can transform into water-soluble Cr6+. Cr6+ can severely damage human skin and mucosa, cause papules, ulcers, nasal septum perforation and respiratory tract inflammation, and can also cause skin cancer and lung cancer. Therefore, the development and popularization of chromium-free refractories is very meaningful and necessary, and the chromium-free refractories will also be an important research and development direction of refractories in the future.