There is no appropriate method or uniform standard for evaluating the pozzolanicity of CFB sulphur-fixed coal ashes,leading to difficulty in use of it as building material,because CFB sulphur-fixed coal ash has higher content of f-CaO and SO_3 than that of ordinary ash.

Fluidized bed combustion (FBC) technology is advanced because it can meet the demand of environment protection, but the byproducts, namely FBC ashes, are still something new to most people.

Due to lack of effective ways to utilize the bottom ashes of circulating fluidized bed combustion (CFB ashes), it is difficult to use widely the advanced technology of circulating fluidized bed combustion and defulfurization.

magnetic-separation Preparation of high quality magnetite concentrate from pyrite cinder by composite pellet reduction-roasting and;

Study on recovering Cu,Zn from pyrite cinder with bioleaching method;

The experiment and industrial application of recovering iron concentrate from pyrite cinder with vertical magnetic separator with pulsating vibration magnetic field were introduced.

Research on preparing potassium compound fertilizer via roasting the mixtrue of potash feldspar with desulfurization ash;

Various comprehensive utilization routes are discussed based on the characters of the desulfurization ash derived from circulating fluidized bed boiler.