Abstract
Fundamental studies on the application of X-ray diffractometer on the analysis of slags were made in which (1) the conditions for formation of melilite in blast-furnace slag were investigated.
The melilite obtained as crystalline form from a mixture of pure substances was always accompanied with a small amount of merwinite, which could be removed by treating with methanolic bromine or citric acid remaining pure melilite.
By this treatment, the detection of a small amount of dicalcium silicate in blast-furnace slag became more available.
(2) Although the complicate mineral composition of copper slag rendered its rational analysis.difficult, the X-ray diffractometry on the residue after the treatment with methanolic bromine or that with citric acid revealed that the main constitutional minerals in copper slag were 2FeOSiO2, CaO·Fe2O3, α-ZnS, β-ZnS, FeO·Fe2O3, ZnO·Fe2O3.
