DETERMINATION OF THE DECOMPOSITION RATE OF FLAME EXTINGUISHING POWDERS

The degree of decomposition of NaHCO3 and KHCO3 (particle size above t he critical diameter of 16 and 22 mum) in flame has been investigated. The compounds were introduced into the flame of special burner and th e particles passed through the flame were collected and examined in MO M Derivatograph Q-1500 D. It has benn concluded that: (1) the decompos ition rate above the critical diameter is dependent on the particle si ze, (2) different suppressing mechanism might dominate below and above the size limits.