Identification of the Iron Compounds in the Clay-Containing Materials

Discrete thermomagnetic analysis allows one to identify the mineral composition of free iron compounds: goethite and hematite (as a result of heating in a reducing environment), iron carbonate and siderite (as a result of heating in an oxidizing environment). New informative criteria were used - the reducing and oxidizing ability of free iron compounds. A classification of clay-containing materials used in the ceramic industry into three groups in accordance with the gradation of the reducing ability of free iron compounds is proposed. Tab. 1, ill. 4, bibliography: 7 titles.