RESEARCH OF IRON SULFATE HEAT TREATMENT IN PRESENCE OF ALKALINE REAGENTS AND WATER

The results of the research of the composition and properties of products formed during the heat treatment of the iron sulfate in the in the presence of alkaline reagents (CaO and Na2CO3) and H2O are presented. It is shown, that the formation of α-Fe2O3 using CaO and H2O occurs at a temperature 600–650°С, Na2CO3 and H2O at a temperature 350–450°С. Products of heat treatment have pigment properties: saturated color, spreading capacity 10–12 g/m2, oil absorption 30–40 g/100 g