What are the main raw material ingredients in ceramic tile & sanitary ware manufacturing process ?

if you do mean for ceramic body the main raw materials for ceramic tiles as well as sanitary ware in generals are clay, feldspar and quartz (silica sand) within these three there are many varieties and different range of physical and chemical properties, thus your selection for the type of for instance clay and it is percentage depend on your desired properties of the products you are intending to produce.

and these are the main ingredients but of course there are  addetives and other materials used in less quantities.

it is clay (en Français argile : slimanite - kaolin, bentonite, montemorillite...)

main rain is clay and feldspath, limestone (calcaire en francais)