Other answers have attempted to demonstrate that there is no source in the Talmud for pouring lead to remove ayin hara.
I agree with those answers, that there is no such source.
However, this false assertion probably arose via a miscommunication, and a misunderstanding on the part of either the author or editor of the article.
What was likely intended was that ayin hara, or even the idea of nullifying ayin hara, has its source in the gemara. Therefore (so they argue), it should not be cast as superstition.
To give an example of exactly this claim from another article about Blei Gissen and Aidel Miller:
“I don’t believe in superstitions. It’s not Jewish,” I said to my friend.
“It’s not a superstition,” she replied. “Ayin-hore” – the evil eye – is real. The Talmud mentions it a lot.”
So this author, or whoever the author interviewed, tried putting forth the same argument, except it got messed up in transmission.
An example of the Talmud discussing the Evil Eye, and practices to remove it, may be found in Berachot 55b:
The second commenced and said: If a man on going into a town is afraid of the Evil Eye, let him take the thumb of his right hand in his left hand and the thumb of his left hand in his right hand, and say: I, so-and-so, am of the seed of Joseph over which the evil eye has no power, as it says: Joseph is a fruitful vine, a fruitful vine by a fountain. Do not read 'ale 'ayin [by a fountain] but 'ole 'ayin [overcoming the evil eye]. R. Jose b. R. Hanina derived it from here: And let them grow into a multitude [weyidgu] in the midst of the earth; just as the fishes [dagim] in the sea are covered by the waters and the evil eye has no power over them so the evil eye has no power over the seed of Joseph. If he is afraid of his own evil eye, he should look at the side of his left nostril.