Interaction in sodium sulphate - carbon batches of various dispersity

We studied mixtures in the Na ₂ SO ₄ + C + SiO ₂ system after heat treatment at different temperatures. A characteristic feature of the interaction at 900 ° C is the flotation of quartz grains with the formation of a dense surface silica-containing layer. Layering of the mixture with flotation of lack of penetration is typical for industrial technology with a lack of a reducing agent. A clear dependence of the reactivity of sulfates and coals on their dispersion was observed. The most favorable combination is coarse sulfate and fine carbon.