Silicate materials are traditional inorganic nonmetallic materials. The following statements about silicate materials are correct: () A. The main components of ordinary glass

A. The raw materials for making ordinary glass are: soda ash, limestone and timely; Common glass chemical oxides (Na 2 O? Cao? 6SiO 2), the main component is silicon dioxide, so A is wrong;

B. The raw materials for producing cement are limestone, clay and gypsum, so B is correct;

C. Water glass is an aqueous solution of sodium silicate, and the main component is sodium silicate, so C is wrong;

D. Porcelain has a dense structure and hardly absorbs water, so D is wrong.

So choose B.