Production of finely dispersed magnesium oxide powders by plasma denitriding nitrate solutions

The results are presented of experimental examination of the plasma process of producing finely dispersed powders of magnesium oxide with the required physico-chemical properties (chemical and grain size composition, specific surface, bulk density, activity of the magnesium oxide powder expresed by its citric number. A method is described of plasma treatment of dispersed solutions of magnesium nitrate yielding the product with a specific composition. To produce the finely dispersed magnesium oxide with the required chemical composition, a particle size of 3-7 m, a specific surface of 42-45 m2/g, a bulk density of 0.3-0.4 g/cm3, and a limonic number of 70-90 s from a magnesium nitrate solution with 150 g MgO/1, the energy required is 25-30 kW.h/kg of Mgo at a holding time of particles in the reaction zone of the reactor of 0.3 s. When using the alloy of the hexahydrate of magnesium nitrate, the energy losses decrease to 10-12 kW.h/kg MgO.