Study on the Desulphurization Characteristics of Industry Alkaline Wastes during Coal Combustion

The desulphurization characteristics of industry alkaline wastes and limestone were studied by means of flue gas analyzer and the high temperature tube reactor. Pore structure and desulphurization product characteristic were investigated respectively by mercury porosimeter and XRD diffraction technology. The reasons why wastes and limestone hold the different desulphurization capability were deeply discussed. The result shows that white clay and carbide slag could capture the release of sulfur at 800~1100degC. Salt slurry and red mud could capture the release of sulfur at first stage at 800~900degC. But when the experimental temperature rises to 1000degC, the sulfur capture abilities of them depress. Pore structures of waste are higher than that of limestone. This makes the sulfation reaction goes further. To sum up, wastes have better sulfur capture ability.