tin dioxide(sno2) electrodes is widely applied to the smelt of top-grade optical glasses and electrolytic aluminum trades. it is especially applied to the smelt of flint glass, barium flint and barium crown and so on because it can’t make the glass polluted. this achievement has already appraised by the expert of henan province science & technology agency. the whole prosperities lie in the leading position in domestic and main prosperities are up to the international advanced level.