石川県富来鉱山産耐火粘土の2, 3の性質

抄録

Fireclay was found at Togi Mine, which, is a lignite mine in the southwestern part of Noto Peninsula.
The present authors investigated the nature of this clay, such as refractoriness, chemical composition, mineralogical component, d. t. a., electron micrograph, etc. The refractoriness of the clay is about SK 34-29 (1, 750°C-1, 650°C). Chemical composition is SiO₂ 43.72, TiO₂ 0.49, A1₂O₃ 35.68, Fe₂O₃ 2.92, MgO 0.47, CaO 0.62, Na₂O 1.05, K₂0 0.40, Ig. loss 13.08, Total 98.43%. Clay minerals are composed dominantly of disordered kaolinite and partly of illite and montmorillonite. The d. t. a. curves show an endothermic peak at near 560°C and an exothermic peak at 940°C.
The properties of Togi Clay are resemble to those of “Kibushi-Clay” but the former has a higher iron content than the latter.