H2KH-28-C motorreductor flender Helical gearboxes H2

Flender/Flender Gear Units/Helical gearboxes H2

argest proportions of the trace elements are incorporated in the vitreous matrix of the clean- gas dust particles (incl , Cr, Mn, Co, Ni, Cu, Zn, As, , Zr, Nb, Mo, Ag, Cd, Sn, Hg, Pb) 1 The following elements were among those determined in the surface compounds and coatings Li, ,Sc,Ti,,Cr,Mn,Fe,Co,Ni,Cu,Znand Nb Incontrast,elementssuchasGa,Ge,As, Se, Zr, Mo, Cd, Sn, Sb, Hg and TI could not be detected in the surfaces of the vitreous particles Large differences in terms of type and quantity were determined in the content of trace ele- ments in the two different types of coke particle As, Zn, Sn and TI could only be determined in the highly porous "low-temperature coke" particles As far as the other trace and heavy metal elements were concerned, the signal intensities of the res ective elements were, in general, appreciably lower in the "corrugated sheet coke"partic1es tRan in the"low-temperature coke" particles The studies of the particle size-dependence of trace element contents showed that, in contrast to several other authors, but in reement with thermodynamic model calculations by SMITH (, the contents in sub-[MCim and [MCrIm fractions do not differ from one another to great extent In the case ofelements such as , Mn, Cr,Zn, Co and Ni, there is mean relative in- crease from [MCrIm to sub-[MCrIm particles by factor of 2 to 3 It appears that this also applies to the numerous aerosol-like sub-[MCrIm particles occurring in dry furnace dusts,whose com- position is similar to that of the larger vitreous particles Filter dusts from coal-fired power stations Dusts taken from four different filter stages of an electrostatic recipitator,dust froman air pre- heater in the same power station, as well as the filter dust ora power station with slag tap furnace were investigated The analyses were performed using light microscopy, -ray powder diffractometry, SEM/EDS, TEM/EDS, -ray fluorescence analysis, AAS, AES-ICP and image analysis methods The