Submitted by examrobotsa on Thu, 01/01/1970 - 05:30 The most important raw materials used in the manufacture of cement arepotassium nitrate, charcoal and sulphur limestone, clay and gypsumtransition metal oxides, sodium hydroxide or potassium hydroxidelimestone, sodium carbonate and silicastats: 0,304,104,40,304,24,40