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China is rich in magnesite resources with reserves ranking the first in the world.Most of the magnesite resources are distributed in the erea of Liaoning Provicne.Magnesite is used for refractory products production and so Liaoning has been a major production base for magnesia refractory products in China.With the rapid development of refractory industry,a large amount of energy is consumed which brings so many emissions into the atmosphere.