The investigation on properties of attapulgite clay and its application for mould coating rheopexy agent

摘要

The physicochemical properties and structure of attapulgite clay, Anhui, China, have been studied by various kinds of measurements and compared with those of attapulgite in USA and Japan respectively. By using a rotary viscometer, the rheology and rheopexy of the suspension liquid of attapulgite clay and sodium bentonite arid their influences on the self-made water base coating's rheologic behaviours for cast steel are investigated. And a mathematical model on the rheopexy has been obtained. The results show that attapulgite clay is one of better rheopexy agents used in water-base mould coatings.