CaMg(CO3)(2), CaCO3, Ca(OH)(2), Sorbacal (R) H90 and their mixts. were used as sorbents for desulfurization of flue gases from a bubbling fluidized bed boiler (6.0 MW) fired with a hard coal as a fuel (S content 0.67-0.77%). The process of dry desulfurization was carried out at avg. temp. of 850 degrees C and sorbents were dosed on hard coal screw conveyor at molar ratios of 0.63-2.64 Ca +Mg/S. The efficiency of the desulfurization was 28-79%. Slightly better efficiencies were achieved for sorbent mixts. than for a single sorbent, at similar Ca+Mg/S molar ratios. A mixt. of CaCO3 and Ca(OH)(2) (1:1) allowed for decreasing SO2 concn. below 200 mg/m(3) in a flue gas (6% O-2).