Experiments on magnetic separation of ash-and-slag mixtures (ASM) of the Apatity thermoelectric plant have shown that they contain easily separable magnetic and nonmagnetic phases with a yield of about 40 and 60%, respectively. The iron content in the fractions on conversion to Fe2O3 is 20 and 8% respectively. The magnetic fraction includes a highly magnetic part (about 5 wt.% of the total mass of the ASM) the iron content of which (Fe2O3) amounts to 44%. The nonmagnetic fraction of the ASM has been used for obtaining refractory materials with a strength and thermal insulation capacity much higher than that of chamotte refractories and the softening properties only somewhat inferior to the latter. The maximum operational temperature of the obtained materials is 1300°C.
Refractories and Industrial Ceramics – Springer Journals
Published: Nov 23, 2007
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